My Inquiry
My Account
Analog Devices Inc. AD7997BRU-0REEL
- Part No.:
- AD7997BRU-0REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7997BRU-0REEL.pdf
- Description:
- IC ADC 10BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,839
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7997BRU-0REEL from Analog Devices is a 10-bit, 8-channel successive approximation ADC with I²C-compatible serial interface, 2 µs conversion time, 2.7 V to 5.5 V supply range, and −40°C to +85°C operation. It integrates an 8:1 analog multiplexer, track-and-hold amplifier, and out-of-range alert function for sensor monitoring in industrial data acquisition systems.
For engineers reviewing the AD7997BRU-0REEL datasheet, AD7997BRU-0REEL pinout, AD7997BRU-0REEL application, or AD7997BRU-0REEL equivalent, key selection considerations include its I²C address select (AS) pin, 20-lead TSSOP package, 188 kSPS maximum throughput in Mode 2 at 5 V, programmable limit registers, and shutdown current of 1 µA max.
Technical Context
The AD7997BRU-0REEL implements a successive approximation register (SAR) architecture with integrated 8-channel analog multiplexer and track-and-hold, supporting single-ended inputs up to 11 MHz full-power bandwidth. Its I²C interface operates in standard (100 kHz) and fast (400 kHz) modes only - not high-speed mode - as confirmed by the "-0" suffix in the part number.
Conversion control supports three modes: CONVST-triggered (Mode 1), command-mode writes (Mode 2), and automatic cycle interval (Mode 3). The ALERT/BUSY pin is configurable as either an out-of-range interrupt or busy indicator, driven by comparison against user-programmed DATAHIGH/DATALOW registers per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR ADC - delivers 1024 discrete output codes with guaranteed no missing codes. |
| Conversion Time | 2 µs typical - enables high-speed sampling without external timing circuitry. |
| Throughput Rate | Up to 188 kSPS in Mode 2 at 5 V - supports real-time monitoring of fast-changing analog signals. |
| Supply Voltage | 2.7 V to 5.5 V - compatible with both 3.3 V and 5 V system rails without level-shifting. |
| Reference Input | 1.2 V to VDD on REFIN pin - allows flexible scaling of input range (0 to REFIN) and maximizes dynamic range. |
| Shutdown Current | 1 µA maximum - minimizes power in idle states for battery-powered or energy-sensitive applications. |
| I²C Addressing | Pin-selectable via AS pin - supports three distinct I²C addresses (0100001, 0100010, 0100000) for multi-device bus sharing. |
Pinout & Package
AD7997BRU-0REEL is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP) with 0.65 mm lead pitch, RoHS-compliant, and rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AGND (Pins 1, 3, 4, 20) | Analog Ground Reference | Common low-impedance return for all analog circuitry; must be separated from digital ground to minimize noise coupling. |
| VDD (Pins 2, 5) | Power Supply Input | Single 2.7–5.5 V supply powers analog and digital sections; decoupling capacitors required near each VDD pin. |
| REFIN (Pin 6) | External Reference Input | Accepts 1.2 V to VDD reference voltage; determines full-scale input range (0 to REFIN); requires 0.1 µF + 1 µF bypassing. |
| VIN1–VIN8 (Pins 7, 8, 9, 10, 11, 12, 13, 14) | Single-Ended Analog Inputs | Eight independent channels accepting 0–REFIN input; internally multiplexed to SAR core; 30 pF input capacitance. |
| AS (Pin 15) | I²C Address Select | Logic level sets one of three I²C addresses (AGND = 0100001, VDD = 0100010, float = 0100000); enables up to five devices on same bus. |
| CONVST (Pin 16) | Convert Start Trigger | Rising edge powers up device; falling edge initiates conversion; requires ≥1 µs high pulse width for valid result. |
| ALERT/BUSY (Pin 17) | Configurable Open-Drain Output | Software-selectable as out-of-range interrupt (based on limit registers) or BUSY indicator during conversion. |
| SDA (Pin 18) | I²C Bidirectional Data | Open-drain I/O requiring external pull-up; supports standard/fast mode I²C up to 400 kHz (not high-speed). |
| SCL (Pin 19) | I²C Clock Input | Open-drain input requiring external pull-up; clock frequency defines maximum throughput in command/automatic modes. |
Key Features
| Feature | Design Value |
|---|---|
| 2 µs conversion time with 1 µA shutdown current | Enables rapid sampling while maintaining ultra-low quiescent power in intermittent measurement systems. |
| I²C-compatible interface with AS pin addressing | Allows up to five AD7997BRU-0REEL devices on a single 2-wire bus without external address decoding logic. |
| Programmable high/low limit registers per channel | Supports autonomous over/under-range detection without host CPU polling, reducing firmware overhead. |
| Automatic shutdown between conversions | Minimizes average power consumption in burst-mode acquisition by powering down analog circuitry when idle. |
| Out-of-range alert with software enable/disable | Provides configurable interrupt capability for fault detection, improving system reliability in safety-critical monitoring. |
Applications
| Industrial Sensor Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous voltage/current monitoring of multiple temperature, pressure, and flow sensors in PLC-based control cabinets. IC Role / Device Role / Timing Role: 8-channel analog front-end digitizing sensor outputs with I²C readout, enabling compact multi-sensor node design. Use Value: Eliminates need for external multiplexer and level-shifting; 2 µs conversion supports >100 kHz sampling of transient events. |
Use Scenario: Channel-scanning acquisition in benchtop multimeters and calibration instruments requiring stable DC accuracy and low noise. IC Role / Device Role / Timing Role: Precision 10-bit digitizer with programmable limits for pass/fail threshold checking during automated test sequences. Use Value: ALERT/BUSY pin provides hardware-triggered fault response, reducing test cycle latency versus polled status reads. |
| Energy Metering Subsystem | Motor Drive Feedback Interface |
|
Use Scenario: Auxiliary voltage and current sensing for anti-tampering detection and auxiliary supply health monitoring in smart meters. IC Role / Device Role / Timing Role: Low-power ADC handling non-critical but safety-relevant analog measurements alongside primary metrology IC. Use Value: 1 µA shutdown current extends backup battery life; I²C compatibility simplifies integration into existing meter SoC communication fabric. |
Use Scenario: Real-time monitoring of gate driver supply voltages, heatsink thermistors, and bus current shunt feedback in servo drives. IC Role / Device Role / Timing Role: Dedicated auxiliary ADC providing isolated analog supervision signals to MCU via shared I²C bus. Use Value: Pin-selectable addressing avoids bus contention with other I²C peripherals; 20-lead TSSOP fits space-constrained drive PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel, I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7998BRU-0REEL | 12-bit resolution, higher SINAD (70.5 dB vs. 61 dB), wider dynamic range, but higher power in active mode. | Better suited for precision measurement where SNR >70 dB is required; less optimal for ultra-low-power duty-cycled systems. | Select AD7998BRU-0REEL when 12-bit accuracy and improved harmonic distortion performance outweigh power budget constraints. |
| AD7992BRUZ-0REEL | 2-channel version, identical 10-bit resolution and I²C interface, same -0 variant addressing and timing specs. | Applicable where only two analog inputs are needed; reduces board area and BOM count but lacks channel scalability. | Choose AD7992BRUZ-0REEL for cost- and space-sensitive dual-input designs where 8-channel capability is unnecessary. |
Compared with AD7997BRU-0REEL, AD7998BRU-0REEL offers higher resolution and dynamic range at increased power cost, while AD7992BRUZ-0REEL provides identical performance in a smaller 2-channel footprint - both share the same I²C timing, package, and operating temperature range.
Availability
AD7997BRU-0REEL is available at Aetrix Electronics and suitable for industrial sensor monitoring, automated test equipment, energy metering subsystems, and motor drive feedback interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7997BRU-0REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design and manufacturing expertise spanning precision data conversion, amplification, and power management.
The AD7997/AD7998 product line was designed specifically for space- and power-constrained industrial and instrumentation systems requiring multi-channel, I²C-interfaced ADCs with autonomous alerting and flexible reference scaling.
FAQ
What is the maximum I²C clock frequency supported by the AD7997BRU-0REEL?
The AD7997BRU-0REEL supports standard mode (100 kHz) and fast mode (400 kHz) I²C operation only. It does not support high-speed mode (3.4 MHz), as indicated by the "-0" suffix in the part number. Maximum throughput in command mode reaches 147 kSPS at 400 kHz SCL, and 188 kSPS is achievable only at 5 V supply under specific Mode 2 conditions.
Does the AD7997BRU-0REEL require an external reference voltage?
Yes, the AD7997BRU-0REEL requires an external reference applied to the REFIN pin. The reference voltage must be between 1.2 V and VDD, and it directly defines the full-scale input range (0 to REFIN). A 0.1 µF ceramic capacitor plus a 1 µF bulk capacitor are recommended between REFIN and AGND for stability.
How many I²C addresses can be configured on the AD7997BRU-0REEL?
The AD7997BRU-0REEL supports three distinct I²C addresses via the AS pin: logic low (AGND) selects 0100001, logic high (VDD) selects 0100010, and floating selects 0100000. This allows up to five AD7997BRU-0REEL devices on the same I²C bus when combined with the AD7997-1 variant.
What is the purpose of the ALERT/BUSY pin on the AD7997BRU-0REEL?
The ALERT/BUSY pin on the AD7997BRU-0REEL is a software-configurable open-drain output. When set to ALERT mode, it asserts when any channel's conversion result exceeds user-defined high or low limits stored in DATALOW/DATAHIGH registers. In BUSY mode, it indicates active conversion. Both functions reduce host processor polling overhead.
Can the AD7997BRU-0REEL operate from a 3.3 V supply?
Yes, the AD7997BRU-0REEL operates from a single 2.7 V to 5.5 V supply, including 3.3 V. At 3.3 V, it maintains full functionality: 10-bit resolution, 2 µs conversion time, I²C communication, and 1 µA shutdown current. Logic thresholds scale with VDD (e.g., VINH ≥ 0.7×VDD), ensuring robust interface compatibility.
AD7997BRU-0REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 188k
- Number of Inputs:
- 8
- Input Type:
- Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7997BRU-0REEL FAQ
1.How can I place an order for AD7997BRU-0REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7997BRU-0REEL 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 AD7997BRU-0REEL reliable?
The price and inventory of AD7997BRU-0REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7997BRU-0REEL is usually 5 days.
3.What payment methods are accepted for AD7997BRU-0REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7997BRU-0REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7997BRU-0REEL?
AD7997BRU-0REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7997BRU-0REEL 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 AD7997BRU-0REEL?
For technical support, including AD7997BRU-0REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7997BRU-0REEL requirements.
6.How does Aetrix verify that AD7997BRU-0REEL is sourced from the original manufacturer or authorized distributors?
All AD7997BRU-0REEL 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 AD7997BRU-0REEL meets industry standards.
7.What is the process for return or replacement of AD7997BRU-0REEL?
All AD7997BRU-0REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7997BRU-0REEL, 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 AD7997BRU-0REEL part is unused and in its original packaging.
Return procedure for AD7997BRU-0REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7997BRU-0REEL Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
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…
