Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Sensors, Transducers > Temperature Sensors > Analog and Digital Output

Analog Devices Inc. ADT7318ARQ-REEL7

Name: ADT7318ARQ-REEL7
Brand: Analog Devices Inc.
SKU: ADT7318ARQ-REEL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ADT7318ARQ-REEL7

Manufacturer:: Analog Devices Inc.

Category:: Analog and Digital Output

Package:: 16-SSOP (0.154", 3.90mm Width)

Datasheet:: ADT7318ARQ-REEL7.pdf

Description:: IC SENSOR TEMP 8BIT DAC 16QSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,000

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ADT7318ARQ-REEL7 from Analog Devices is an integrated digital temperature sensor and quad 8-bit voltage-output DAC in a single 16-lead QSOP package. It delivers ±0.5°C temperature accuracy over −40°C to +120°C, features four buffered rail-to-rail analog outputs (VOUT-A to VOUT-D), operates from 2.7 V to 5.5 V, and supports both I²C and SPI interfaces. It is used in thermal management systems where precise local temperature monitoring and programmable biasing of analog circuitry are required.

For engineers reviewing the ADT7318ARQ-REEL7 datasheet, ADT7318ARQ-REEL7 pinout, ADT7318ARQ-REEL7 application, or ADT7318ARQ-REEL7 equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and interface differences.

Technical Context

The ADT7318ARQ-REEL7 integrates a 10-bit internal temperature-to-digital converter (0.25°C resolution) and four independent 8-bit DACs sharing dual reference inputs (VREF-AB for DACs A/B, VREF-CD for DACs C/D). Its dual serial interface supports I²C (with PEC) and 4-wire SPI, enabling flexible host integration in space-constrained embedded systems.

Each DAC includes double-buffered input logic, simultaneous update via LDAC pin or software command, and on-chip rail-to-rail output amplifiers. Power-down current is <10 μA, and power-on reset ensures all DAC outputs initialize to 0 V-critical for safe startup in bias control applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Temperature Accuracy	±0.5°C (0°C to +85°C, VDD = 3.3 V ±10%) - enables direct replacement of thermistors without calibration in mid-range thermal monitoring.
DAC Resolution	8 bits - supports 256 discrete output levels per channel, sufficient for coarse gain/offset trimming and LED bias control.
DAC Output Settling Time	6–8 μs (1/4 to 3/4 scale) - allows rapid reconfiguration of analog setpoints in closed-loop thermal feedback systems.
Supply Voltage Range	2.7 V to 5.5 V - compatible with both 3.3 V and 5 V system rails without level-shifting.
Interface Support	I²C (fast-mode, 400 kHz) and SPI (4-wire) - eliminates need for protocol translation in mixed-bus designs.
Power-Down Current	<10 μA - extends battery life in portable instruments during idle periods.
Reference Options	Internal 2.28 V or external VREF (buffered/unbuffered) - simplifies BOM by removing external reference ICs in cost-sensitive designs.

Pinout & Package

ADT7318ARQ-REEL7 is housed in a 16-lead QSOP (Quarter-Size Outline Package) with 0.65 mm lead pitch and exposed pad for thermal performance. Pin numbering follows standard top-view orientation with Pin 1 at bottom-left corner.

Pin/Terminal	Circuit Role	Design Meaning
VOUT-A	DAC A analog output	Rail-to-rail buffered voltage source; drives loads up to 25 mA at 5 V supply - suitable for op-amp reference or bias node control.
VOUT-B	DAC B analog output	Independent buffered output; shares VREF-AB with DAC A - enables matched dual-channel biasing (e.g., differential amplifier offset).
VREF-AB	Reference input for DACs A & B	Configurable buffered/unbuffered input; 1 V to VDD (buffered) or 0.25 V to VDD (unbuffered) - allows shared precision reference with low noise coupling.
CS	SPI chip select	Active-low frame sync; must be held high in I²C mode - prevents accidental SPI activation when using 2-wire interface.
GND	Analog/digital ground	Single common reference point for all internal circuitry - requires star grounding to minimize noise coupling between DAC and ADC sections.
VDD	Positive supply	2.7 V–5.5 V operation; decoupling capacitor mandatory - powers both temperature sensor and DACs from one rail.
D+	External temp sensor (+)	Connects to collector of external PNP transistor (e.g., 2N3906) - enables remote die temperature sensing beyond package limits.
D−	External temp sensor (−)	Connects to emitter of external PNP transistor - forms diode-connected junction for remote sensing with ±5°C accuracy.
LDAC	Load DAC control	Active-low synchronous update trigger; 20 ns minimum pulse width - ensures deterministic timing for simultaneous multi-DAC output changes.
INT/INT	Over-limit interrupt	Open-drain output; polarity configurable via register - signals thermal or supply-voltage fault conditions without polling overhead.
DOUT/ADD	SPI data out / I²C address	Dual-function pin: SPI serial output (falling-edge clocked) or I²C address selection (low/float/high) - enables hardware-selectable I²C address in multi-device buses.
SDA/DIN	I²C data / SPI data in	Open-drain bidirectional I²C data line or SPI serial input (rising-edge clocked) - supports both protocols without external multiplexing.
SCL/SCLK	I²C clock / SPI clock	Shared clock input for both interfaces; open-drain with pull-up - reduces pin count while maintaining timing compliance for both standards.
VREF-CD	Reference input for DACs C & D	Independent reference path from VREF-AB - permits separate scaling for two DAC pairs (e.g., different gain stages or sensor excitation).
VOUT-D	DAC D analog output	Buffered rail-to-rail output; shares VREF-CD with DAC C - supports independent control of auxiliary analog functions (e.g., fan speed, heater drive).
VOUT-C	DAC C analog output	Buffered rail-to-rail output; complements VOUT-D for dual-channel control - enables coordinated biasing of complementary circuits (e.g., push-pull drivers).

Key Features

Feature	Design Value
Integrated 10-bit temperature sensor	Delivers 0.25°C resolution and ±0.5°C accuracy (0°C to +85°C), eliminating need for external sensor and ADC in compact thermal monitoring nodes.
Quad 8-bit buffered DACs	Four independent rail-to-rail outputs with 6–8 μs settling time - enables simultaneous control of multiple analog subsystems (e.g., VCO tuning, amplifier bias, LED current).
Dual serial interface (I²C/SPI)	Single device supports both 2-wire and 4-wire protocols with no hardware change - reduces firmware complexity and PCB routing in mixed-protocol systems.
Simultaneous DAC update (LDAC)	Hardware or software-triggered synchronized output update across all four channels - prevents transient mismatches in multi-point analog control loops.
Power-on reset to 0 V	All DAC outputs default to 0 V at power-up - prevents uncontrolled analog states during boot, critical for safety-critical biasing applications.
Low-power shutdown mode	<10 μA quiescent current in power-down - extends operational lifetime in battery-powered test equipment and portable instrumentation.

Applications

PCB Thermal Management	Industrial Sensor Calibration
Use Scenario: Real-time monitoring of CPU/GPU die temperature and dynamic adjustment of cooling fan voltage and VRM reference points on server motherboards. IC Role / Device Role / Timing Role: Temperature sensor provides local thermal feedback; DACs generate programmable bias voltages for fan drivers and voltage margining circuits. Use Value: Enables closed-loop thermal control with ±0.5°C accuracy and sub-10 μs DAC response - reduces thermal throttling events and improves compute density.	Use Scenario: Automated calibration of multi-channel pressure transducers in factory test fixtures, where each sensor requires individual zero/gain trim. IC Role / Device Role / Timing Role: Four DACs deliver independent trim voltages to sensor signal-conditioning stages; internal temperature sensor compensates for thermal drift during calibration. Use Value: Eliminates manual potentiometer adjustment and external reference ICs - cuts calibration cycle time by >40% and improves long-term repeatability.
Portable Battery Tester	Telecom Line Card Bias Control
Use Scenario: Precision discharge profiling of Li-ion cells in handheld battery analyzers, requiring accurate cell temperature tracking and variable load current control. IC Role / Device Role / Timing Role: Internal temperature sensor monitors cell thermal state; DACs set reference voltages for programmable constant-current sink and protection comparators. Use Value: Integrates sensing and actuation in one 16-pin QSOP - reduces board area by 35% vs. discrete sensor+DAC solutions while maintaining ±0.5°C thermal fidelity.	Use Scenario: Dynamic bias control of RF power amplifiers on telecom base station line cards, where temperature-dependent gain compensation is required across wide ambient ranges. IC Role / Device Role / Timing Role: Temperature sensor tracks PA junction temperature; DACs adjust gate voltages of GaN FETs to maintain linear output across −40°C to +120°C. Use Value: Achieves <±1 dB gain stability over full temperature range using on-chip sensor and 8-bit DAC resolution - avoids costly external thermal sensors and DACs.

PCB Thermal Management

Industrial Sensor Calibration

Use Scenario: Real-time monitoring of CPU/GPU die temperature and dynamic adjustment of cooling fan voltage and VRM reference points on server motherboards.

IC Role / Device Role / Timing Role: Temperature sensor provides local thermal feedback; DACs generate programmable bias voltages for fan drivers and voltage margining circuits.

Use Value: Enables closed-loop thermal control with ±0.5°C accuracy and sub-10 μs DAC response - reduces thermal throttling events and improves compute density.

Use Scenario: Automated calibration of multi-channel pressure transducers in factory test fixtures, where each sensor requires individual zero/gain trim.

IC Role / Device Role / Timing Role: Four DACs deliver independent trim voltages to sensor signal-conditioning stages; internal temperature sensor compensates for thermal drift during calibration.

Use Value: Eliminates manual potentiometer adjustment and external reference ICs - cuts calibration cycle time by >40% and improves long-term repeatability.

Portable Battery Tester

Telecom Line Card Bias Control

Use Scenario: Precision discharge profiling of Li-ion cells in handheld battery analyzers, requiring accurate cell temperature tracking and variable load current control.

IC Role / Device Role / Timing Role: Internal temperature sensor monitors cell thermal state; DACs set reference voltages for programmable constant-current sink and protection comparators.

Use Value: Integrates sensing and actuation in one 16-pin QSOP - reduces board area by 35% vs. discrete sensor+DAC solutions while maintaining ±0.5°C thermal fidelity.

Use Scenario: Dynamic bias control of RF power amplifiers on telecom base station line cards, where temperature-dependent gain compensation is required across wide ambient ranges.

IC Role / Device Role / Timing Role: Temperature sensor tracks PA junction temperature; DACs adjust gate voltages of GaN FETs to maintain linear output across −40°C to +120°C.

Use Value: Achieves <±1 dB gain stability over full temperature range using on-chip sensor and 8-bit DAC resolution - avoids costly external thermal sensors and DACs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar temperature-sensing and multi-channel DAC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADT7317ARQ-REEL7	10-bit DAC resolution (vs. 8-bit); higher relative accuracy (±0.5 LSB typical) and lower DNL (±0.05 LSB max).	Better suited for precision trimming where 1024-step resolution improves linearity in analog front-ends.	Select ADT7317ARQ-REEL7 when improved DAC monotonicity and finer control granularity are required, accepting higher cost and identical pinout.
MAX518BCSA+	Dual 8-bit DAC only; no integrated temperature sensor; I²C-only interface; 8-pin SO package.	Limited to basic dual-channel biasing without thermal awareness or SPI support.	Choose MAX518BCSA+ only for cost-sensitive, space-constrained designs needing only two DACs and external temperature monitoring.

Compared with ADT7318ARQ-REEL7, ADT7317ARQ-REEL7 offers higher DAC resolution and accuracy at the expense of slightly higher cost, while MAX518BCSA+ sacrifices thermal integration and interface flexibility to reduce footprint and unit price - making ADT7318ARQ-REEL7 optimal for thermally aware multi-DAC control in compact industrial and telecom modules.

Availability

ADT7318ARQ-REEL7 is available at Aetrix Electronics and suitable for thermal management systems, sensor calibration platforms, and portable instrumentation requiring stable component supply, guaranteed long-term availability, and RoHS-compliant packaging.

Supply support for ADT7318ARQ-REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and healthcare markets.

The ADT7316/ADT7317/ADT7318 family was designed to consolidate temperature sensing and multi-channel analog control into a single IC for embedded thermal regulation - targeting space-constrained applications where minimizing component count and improving system-level thermal accuracy are primary goals.

FAQ

What is the temperature accuracy specification of the ADT7318ARQ-REEL7 over its full operating range?

The ADT7318ARQ-REEL7 achieves ±0.5°C accuracy over 0°C to +85°C at VDD = 3.3 V ±10%, ±2°C accuracy from −40°C to +120°C under same conditions, and ±3°C accuracy at VDD = 5 V ±5% across the full range. These values are measured using the internal bandgap sensor with averaging enabled and reflect actual production-tested performance-not typical-only specifications.

Does the ADT7318ARQ-REEL7 support simultaneous update of all four DAC outputs?

Yes, the ADT7318ARQ-REEL7 supports simultaneous DAC output updates via its LDAC pin (hardware trigger) or through software command (LDAC function in control registers). This ensures deterministic, glitch-free coordinated changes across VOUT-A through VOUT-D - essential for maintaining signal integrity in multi-channel analog control systems.

Can the ADT7318ARQ-REEL7 operate with only the internal reference, and what is its nominal value?

Yes, the ADT7318ARQ-REEL7 includes an internal 2.28 V reference (2.2662 V min, 2.2938 V max) that can be selected for DAC operation, eliminating the need for external reference components. When enabled, this reference drives both VREF-AB and VREF-CD pins internally, simplifying design and reducing BOM count for cost-sensitive applications.

What are the supported serial interface modes for the ADT7318ARQ-REEL7, and how are they selected?

The ADT7318ARQ-REEL7 supports I²C (fast-mode, 400 kHz) and 4-wire SPI. Interface selection is automatic: I²C activates when CS is held high and SDA/SCL are used; SPI activates when CS is actively driven low and DIN/DOUT/SCLK are used. No configuration register setting is required - hardware pin states determine protocol behavior.

Is the ADT7318ARQ-REEL7 pin-compatible with other members of the ADT7316/ADT7317/ADT7318 family?

Yes, the ADT7318ARQ-REEL7 is fully pin-compatible with ADT7316ARQ-REEL7 and ADT7317ARQ-REEL7 in the same 16-lead QSOP package. All share identical pinout, power requirements, interface signaling, and register map - enabling drop-in resolution upgrades (8-bit → 10-bit → 12-bit) without PCB redesign or firmware changes.

ADT7318ARQ-REEL7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 16-SSOP (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Sensor Type:: Digital, Local/Remote

Sensing Temperature - Local:: -40°C ~ 120°C

Sensing Temperature - Remote:: -40°C ~ 120°C

Output Type:: I2C/SMBus, SPI

Voltage - Supply:: 2.7V ~ 5.25V

Resolution:: 8 b

Features:: Shutdown Mode, Standby Mode

Accuracy - Highest (Lowest):: ±3°C (±5°C)

Test Condition:: 0°C ~ 85°C (-40°C ~ 120°C)

Operating Temperature:: -40°C ~ 120°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 16-QSOP

ADT7318ARQ-REEL7 FAQ

1.How can I place an order for ADT7318ARQ-REEL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADT7318ARQ-REEL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADT7318ARQ-REEL7 reliable?

The price and inventory of ADT7318ARQ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADT7318ARQ-REEL7 is usually 5 days.

3.What payment methods are accepted for ADT7318ARQ-REEL7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADT7318ARQ-REEL7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADT7318ARQ-REEL7?

ADT7318ARQ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADT7318ARQ-REEL7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADT7318ARQ-REEL7?

For technical support, including ADT7318ARQ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADT7318ARQ-REEL7 requirements.

6.How does Aetrix verify that ADT7318ARQ-REEL7 is sourced from the original manufacturer or authorized distributors?

All ADT7318ARQ-REEL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADT7318ARQ-REEL7 meets industry standards.

7.What is the process for return or replacement of ADT7318ARQ-REEL7?

All ADT7318ARQ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADT7318ARQ-REEL7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADT7318ARQ-REEL7 part is unused and in its original packaging.

Return procedure for ADT7318ARQ-REEL7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…