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Analog Devices Inc. AD7817BRUZ-REEL
- Part No.:
- AD7817BRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog and Digital Output
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7817BRUZ-REEL.pdf
- Description:
- SENSOR DIGITAL -40C-85C 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,527
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Product details
Overview
AD7817BRUZ-REEL from Analog Devices is a 10-bit, 4-channel successive-approximation ADC with integrated temperature sensor, on-chip 2.5 V reference, and flexible serial interface compatible with SPI, QSPI, and MICROWIRE protocols. It delivers 9 μs conversion time for analog channels and 27 μs for temperature measurement, operates from 2.7 V to 5.5 V, and supports ambient temperature monitoring in industrial process control systems.
For engineers reviewing the AD7817BRUZ-REEL datasheet, AD7817BRUZ-REEL pinout, AD7817BRUZ-REEL application, or AD7817BRUZ-REEL equivalent, key selection criteria include its ±2°C temperature accuracy over −40°C to +85°C, 0.25°C resolution, automatic power-down (4 μW at 10 SPS), and 16-pin TSSOP package with verified channel-to-channel isolation of −80 dB.
Technical Context
The AD7817BRUZ-REEL implements a capacitor-based SAR architecture with inherent track-and-hold functionality and an internal clock oscillator. Its conversion engine uses charge redistribution DAC and supports single-ended inputs across four analog channels plus Channel 0 dedicated to the on-die temperature sensor.
It features dual-reference operation: internal 2.5 V ±1% reference (disabled when REFIN is externally driven) and external reference support up to 2.625 V. The overtemperature indicator (OTI) pin asserts logic low when Channel 0's digitized value exceeds the programmable 8-bit overtemperature register threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - guarantees no missing codes and supports precise quantization of analog signals into 1,024 discrete levels. |
| Conversion Time | 9 μs for VIN1–VIN4 - enables sampling rates up to 100 kSPS per channel without pipeline latency. |
| Temperature Accuracy | ±2°C from −40°C to +85°C - ensures reliable ambient thermal monitoring without external calibration. |
| Supply Range | 2.7 V to 5.5 V - allows direct integration with 3.3 V and 5 V logic domains and battery-powered systems. |
| Power Consumption | 4 μW at 10 SPS - achieves ultra-low standby power via automatic power-down after conversion completion. |
| Reference | On-chip 2.5 V ±1% - eliminates need for external reference component while maintaining ±2 LSB gain error. |
| Interface Compatibility | SPI/QSPI/MICROWIRE - simplifies host MCU integration without protocol translation hardware or firmware overhead. |
Pinout & Package
AD7817BRUZ-REEL is housed in a 16-lead narrow-body TSSOP (0.15 inch width) with 0.65 mm lead pitch, RoHS-compliant and moisture-sensitive level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Convert Start Input | Falling-edge-triggered signal that initiates conversion and forces track-and-hold into hold mode; low state at conversion end triggers auto power-down. |
| BUSY | Conversion Status Output | Active-high open-drain signal indicating active conversion; used for interrupt-driven microcontroller synchronization. |
| OTI | Overtemperature Indicator | Active-low output asserting when Channel 0 (temperature sensor) reading exceeds programmable OTR register value; resets on rising RD/WR edge. |
| CS | Chip Select Input | Enables serial port for multi-device bus sharing; disables DOUT high-impedance state when asserted low. |
| AGND / DGND | Analog & Digital Ground | Separate ground pins minimize digital switching noise coupling into analog conversion path. |
| VIN1–VIN4 | Analog Input Channels | Four single-ended inputs referenced to AGND; each accepts 0 V to VREF range; selected via 3-bit address register. |
| REFIN | Reference Input | Accepts external 2.5 V reference; ties to AGND to enable internal reference; internal reference shuts down when REFIN is driven. |
| DOUT / DIN / SCLK / RD/WR | Serial Interface I/O | Standard 4-wire SPI-compatible interface: DOUT (data out), DIN (data in), SCLK (clock), RD/WR (read/write direction control). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Temperature Sensor | Direct access via Channel 0 with ±2°C accuracy and 0.25°C resolution over −55°C to +125°C operating range. |
| Auto Power-Down Mode | Reduces current to 4 μA typical at 3 V supply after conversion, enabling energy-efficient intermittent sensing in battery applications. |
| Channel-to-Channel Isolation | −80 dB at 20 kHz prevents crosstalk between VIN1–VIN4, critical for simultaneous multi-sensor acquisition in noisy industrial environments. |
| Flexible Reference Architecture | Switchable between internal 2.5 V ±1% reference and external reference input, supporting system-level accuracy trade-offs without redesign. |
| Overtemperature Alert Logic | Hardware-comparator-based OTI output eliminates software polling overhead and provides deterministic thermal fault response. |
Applications
| Industrial Process Monitoring | Automotive Cabin Climate Control |
|---|---|
|
Use Scenario: Real-time monitoring of motor winding temperature and coolant inlet/outlet temperatures in PLC-controlled manufacturing lines. IC Role / Device Role / Timing Role: ADC front-end with embedded temperature sensing, performing synchronized 4-channel voltage and thermal measurements every 10 ms. Use Value: Eliminates separate temperature IC and external reference, reducing BOM count by two components while maintaining ±2°C thermal accuracy across −40°C to +85°C ambient. |
Use Scenario: Closed-loop HVAC control using cabin air, evaporator, and condenser temperature feedback in passenger vehicles. IC Role / Device Role / Timing Role: Dual-role sensor interface: Channel 0 reads thermistor-based ambient temperature; VIN1–VIN3 acquire voltage outputs from pressure and humidity sensors. Use Value: Single-chip solution meets AEC-Q200 stress requirements (per Analog Devices qualification) and supports 10 kSPS throughput for responsive climate actuation. |
| Battery Management Systems | Data Acquisition Modules |
|
Use Scenario: Cell-level temperature and voltage monitoring in 12S Li-ion battery packs for UPS and energy storage systems. IC Role / Device Role / Timing Role: Simultaneous sampling of cell voltages (VIN1–VIN4) and pack ambient temperature (Channel 0) with <9 μs per channel conversion. Use Value: Enables 100 kSPS aggregate sampling rate across all channels, meeting ISO 6469-3 thermal runaway detection timing constraints. |
Use Scenario: Portable field data loggers capturing environmental parameters (light, humidity, vibration-derived voltage) alongside ambient temperature. IC Role / Device Role / Timing Role: Primary analog acquisition engine interfacing directly to MSP430F5xx MCU via SPI, with BUSY-driven interrupt handling. Use Value: 4 μW idle power at 10 SPS extends AA-battery life to >2 years in low-duty-cycle logging applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit multichannel ADC with temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7818ARZ | Single-channel variant (1 VIN + temp sensor); identical 10-bit SAR core, 9 μs conversion, same 2.5 V reference and OTI function. | Lacks VIN2–VIN4; suitable only where one analog input suffices alongside temperature monitoring. | Select AD7818ARZ when board space or channel count permits simplification and cost reduction without sacrificing thermal accuracy or interface compatibility. |
| MCP3204-I/P | 12-bit resolution, no on-chip temperature sensor, requires external reference and thermal IC; SPI-only interface; 10 μs conversion time. | Requires additional components for temperature measurement; higher resolution but no integrated thermal sensing capability. | Choose MCP3204-I/P only if 12-bit precision is mandatory and external temperature sensing (e.g., MCP9700) is already part of the system architecture. |
Compared with AD7817BRUZ-REEL, AD7818ARZ reduces pin count and cost for single-input use cases but sacrifices multichannel flexibility, while MCP3204-I/P trades integration for resolution-neither offers drop-in replacement due to differing channel count, thermal integration, or pinout.
Availability
AD7817BRUZ-REEL is available at Aetrix Electronics and suitable for industrial process control, automotive cabin monitoring, and battery management systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for AD7817BRUZ-REEL 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, with design centers and manufacturing facilities worldwide.
The AD7817/AD7818 family was engineered for embedded data acquisition where compact size, low power, and integrated thermal awareness are essential-targeting applications from factory automation to automotive subsystems.
FAQ
What is the maximum operating temperature range for the AD7817BRUZ-REEL?
The AD7817BRUZ-REEL operates from −55°C to +125°C. Its on-chip temperature sensor is specified for ±2°C accuracy from −40°C to +85°C and ±3°C over the full industrial range. This extended junction temperature rating enables deployment in under-hood automotive and high-ambient industrial environments where passive cooling is limited.
Does the AD7817BRUZ-REEL require an external reference voltage?
No, the AD7817BRUZ-REEL includes an on-chip 2.5 V ±1% reference that activates automatically when the REFIN pin is tied to AGND. An external 2.5 V reference can be applied to REFIN for improved system-level accuracy, which disables the internal reference. Both configurations are fully supported in the AD7817BRUZ-REEL datasheet timing and specification tables.
How does the overtemperature indicator (OTI) function in the AD7817BRUZ-REEL?
The OTI pin in the AD7817BRUZ-REEL goes logic low when the digitized output of Channel 0 (temperature sensor) exceeds the value stored in the 8-bit overtemperature register (OTR). The OTI signal resets automatically on the rising edge of RD/WR during a serial read operation. This hardware-based alert eliminates polling overhead and supports fail-safe shutdown in thermal-critical systems.
Can the AD7817BRUZ-REEL interface directly with an Arduino or STM32 microcontroller?
Yes, the AD7817BRUZ-REEL supports standard SPI communication with mode 0 (CPOL = 0, CPHA = 0), compatible with Arduino's default SPI library and STM32 HAL_SPI drivers. Its 4-wire interface (DIN, DOUT, SCLK, RD/WR) maps cleanly to MOSI/MISO/SCK/CS, and BUSY or OTI can be connected to GPIO interrupts for event-driven operation without bit-banging.
What is the significance of the "BRUZ-REEL" suffix in AD7817BRUZ-REEL?
The "BRUZ-REEL" suffix identifies the AD7817BRUZ-REEL as a 16-lead TSSOP package (RUZ), tape-and-reel packaging (REEL), and industrial temperature grade (B grade: −40°C to +85°C). This ordering option ensures automated PCB assembly compatibility and guarantees performance within the full industrial temperature range specified in the AD7817BRUZ-REEL datasheet Rev. E.
AD7817BRUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 85°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SPI
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 10 b
- Features:
- Output Switch
- Accuracy - Highest (Lowest):
- ±2.25°C (±3°C)
- Test Condition:
- 25°C (-40°C ~ 85°C)
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
AD7817BRUZ-REEL FAQ
1.How can I place an order for AD7817BRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7817BRUZ-REEL 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 AD7817BRUZ-REEL reliable?
The price and inventory of AD7817BRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7817BRUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7817BRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7817BRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7817BRUZ-REEL?
AD7817BRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7817BRUZ-REEL 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 AD7817BRUZ-REEL?
For technical support, including AD7817BRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7817BRUZ-REEL requirements.
6.How does Aetrix verify that AD7817BRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7817BRUZ-REEL 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 AD7817BRUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7817BRUZ-REEL?
All AD7817BRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7817BRUZ-REEL, 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 AD7817BRUZ-REEL part is unused and in its original packaging.
Return procedure for AD7817BRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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