AD7997
8-Channel, 10-Bit ADC with I2C Compatible Interface in 20-Lead TSSOP
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Features
- 10-Bit ADC with Fast Conversion Time: 2 µs
- Eight Single-Ended Analog Input Channels
- Specified for VDD of 2.7 V to 5.5 V
- Low Power Consumption
- Fast Throughput Rate: up to 188 kSPS
- Sequencer Operation
- Automatic Cycle Mode
- I2C® Compatible Serial Interface
- I2C® Interface supports:
Standard, Fast, and High-Speed Modes - Out of Range Indicator
- Pin-Selectable Addressing via AS
- Automatic Shutdown Mode: 1 µA max
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The AD7997 / AD7998 are 8-channel, 10- and 12-bit, low power, successive approximation ADCs with an I2C-compatible interface. The parts operate from a single 2.7 V to 5.5 V power supply and feature a 2 µs conversion time. The parts contain an 8-channel multiplexer and track-and-hold amplifier that can handle input frequencies up to 11 MHz.
The AD7997 / AD7998 provide a 2-wire serial interface that is compatible with I2C interfaces. Each part comes in two versions, AD7997-0 / AD7998-0 and AD7997-1 / AD7998-1, and each version allows at least two different I2C addresses. The I2C interface on the AD7997-0 / AD7998-0 supports standard and fast I2C interface modes. The I2C interface on the AD7997-1 / AD7998-1 supports standard, fast, and high speed I2C interface modes.
The AD7997 / AD7998 normally remain in a shutdown state while not converting, and power up only for conversions. The conversion process can be controlled using the CONVST pin, by a command mode where conversions occur across I2C write operations or an automatic conversion interval mode selected through software control.
The AD7997 / AD7998 require an external reference that should be applied to the REFIN pin and can be in the range of 1.2 V to VDD. This allows the widest dynamic input range to the ADC.
On-chip limit registers can be programmed with high and low limits for the conversion result, and an open-drain, out-of-range indicator output (ALERT) becomes active when the programmed high or low limits are violated by the conversion result. This output can be used as an interrupt.
PRODUCT HIGHLIGHTS
- 2 µs conversion time with low power consumption.
- I2C-compatible serial interface with pin-selectable addresses. Two AD7997 / AD7998 versions allow five AD7997 / AD7998 devices to be connected to the same serial bus.
- The parts feature automatic shutdown while not converting to maximize power efficiency. Current consumption is 1 µA max when in shutdown mode at 3V.
- Reference can be driven up to the power supply.
- Out-of-range indicator that can be software disabled or enabled.
- One-shot and automatic conversion rates.
- Registers store minimum and maximum conversion results.
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
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Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
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AD7997
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7997BRUZ-0 |
20-Lead TSSOP
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| AD7997BRUZ-0REEL |
20-Lead TSSOP
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| AD7997BRUZ-1 |
20-Lead TSSOP
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| AD7997BRUZ-1REEL |
20-Lead TSSOP
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- AD7997BRUZ-0
- Pin/Package Drawing
-
20-Lead TSSOP
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
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SamacSys
- AD7997BRUZ-0REEL
- Pin/Package Drawing
-
20-Lead TSSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD7997BRUZ-1
- Pin/Package Drawing
-
20-Lead TSSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD7997BRUZ-1REEL
- Pin/Package Drawing
-
20-Lead TSSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
Apr 5, 2021
- 21_0035
Amkor Philippines as an Alternate Site for TSSOP_4.4
AD7997BRUZ-0
PRODUCTION
AD7997BRUZ-0REEL
PRODUCTION
AD7997BRUZ-1
PRODUCTION
AD7997BRUZ-1REEL
PRODUCTION
Jul 23, 2014
- 13_0241
Qualification of ASE Chungli as an Alternate Assembly Site for Select 16L, 20L and 24L TSSOP Packages
AD7997BRUZ-0
PRODUCTION
AD7997BRUZ-0REEL
PRODUCTION
AD7997BRUZ-1
PRODUCTION
AD7997BRUZ-1REEL
PRODUCTION
Jan 20, 2012
- 11_0218
Halogen Free Material Change for Certain TSSOP Products at Carsem
AD7997BRUZ-0
PRODUCTION
AD7997BRUZ-0REEL
PRODUCTION
AD7997BRUZ-1
PRODUCTION
AD7997BRUZ-1REEL
PRODUCTION
Feb 8, 2010
- 04_0080
Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.
AD7997BRUZ-0
PRODUCTION
AD7997BRUZ-0REEL
PRODUCTION
AD7997BRUZ-1
PRODUCTION
AD7997BRUZ-1REEL
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Apr 5, 2021
- 21_0035
Amkor Philippines as an Alternate Site for TSSOP_4.4
AD7997BRUZ-0
PRODUCTION
AD7997BRUZ-0REEL
PRODUCTION
AD7997BRUZ-1
PRODUCTION
AD7997BRUZ-1REEL
PRODUCTION
Jul 23, 2014
- 13_0241
Qualification of ASE Chungli as an Alternate Assembly Site for Select 16L, 20L and 24L TSSOP Packages
AD7997BRUZ-0
PRODUCTION
AD7997BRUZ-0REEL
PRODUCTION
AD7997BRUZ-1
PRODUCTION
AD7997BRUZ-1REEL
PRODUCTION
Jan 20, 2012
- 11_0218
Halogen Free Material Change for Certain TSSOP Products at Carsem
AD7997BRUZ-0
PRODUCTION
AD7997BRUZ-0REEL
PRODUCTION
AD7997BRUZ-1
PRODUCTION
AD7997BRUZ-1REEL
PRODUCTION
Feb 8, 2010
- 04_0080
Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.
AD7997BRUZ-0
PRODUCTION
AD7997BRUZ-0REEL
PRODUCTION
AD7997BRUZ-1
PRODUCTION
AD7997BRUZ-1REEL
PRODUCTION
Software & Part Ecosystem
Device Drivers
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2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Single Amplifier |
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2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Dual Amplifier |
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Precision, Low Noise, CMOS, RRIO Op Amp (single) |
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Ultralow Distortion, Ultralow Noise Op Amp (Dual) |
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Series Voltage References7 |
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2.048V, Precision Micropower, Low Dropout, Low Voltage Reference |
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Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
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Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
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Ultracompact, Precision 2.5 V Voltage Reference |
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2.5V Micropower, Precisions Series Mode Voltage References |
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2.048 V and 2.5 V Bandgap Voltage References |
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2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown |
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Shunt Voltage References1 |
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PRODUCTION |
2.5 V/3.0 V High Precision Reference |
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Can't find the software or driver you need?
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EVAL-AD7997
AD7997 Evaluation Board
Product Detail
The EVAL-AD7997EBZ is a fully featured evaluation Board for the AD7997. The evaluation board can be operated in complete standalone mode or connected to a PC via a standard USB interface. When operated with a PC, software is provided enabling the user to perform detailed analysis of the ADC's performance. This software includes the technical note describing the operation and set up of the evaluation board.
Please note: This Evaluation software does not run on Windows 8 or Windows 10 (USB driver is non-compliant with OS >Windows 7).
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