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AD7992: 2 Channel, 12-Bit ADC with I2C Compatible Interface in 10-Lead MSOP Data Sheet (Rev. 0)9/18/2015PDF928 kB
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AD7992: Errata Sheet (Rev. A)1/21/2004PDF51 kB
Overview
Features and Benefits
- 12-Bit ADC with Fast Conversion Time: 2 µs
- Two Single-Ended Analog Input Channels
- Specified for VDD of 2.7 V to 5.5 V
- Low Power Consumption
- Fast Throughput Rate: - 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
Product Details
The AD7992 is a 12-bit, low power, successive approximation ADC with an I2 C-compatible interface. The part operates from a single 2.7 V to 5.5 V power supply and features a 2 µs conversion time. The part contains a 2-channel multiplexer and track-and-hold amplifier that can handle input frequencies up to 11 MHz.
The AD7992 provides a 2-wire serial interface compatible with I2C interfaces. The part comes in two versions, the AD7992-0 and the AD7992-1, and each version allows for at least two different I2C addresses. The AD7992-0 supports standard and fast I2C interface modes, and the AD7992-1 supports standard, fast, and high speed I2C interface modes.
The AD7992 normally remains in a shutdown state while not converting, and powers 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 AD7992 requires an external reference 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 conversion result violates the programmed high or low limits. This output can be used as an interrupt.
PRODUCT HIGHLIGHTS
- 2 µs conversion time and low power consumption.
- I2C-compatible serial interface with pin-selectable addresses. Two AD7992 versions allow five AD7992 devices to be connected to the same serial bus.
- The part features automatic shutdown while not converting to maximize power efficiency. Current consumption is 1 µA max when in shutdown mode at 3 V.
- 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.
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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Understanding PulSAR ADC Support Circuitry7/30/2020
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AN-686: Implementing an I2C® Reset (Rev. 0)12/16/2003PDF44 kB
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8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog3/8/2008PDF1885 kB
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CN-0301: Universal LVDT Signal Conditioning Circuit12/5/2013PDF313 kB
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CN0288: LVDT Signal Conditioning Circuit3/26/2013PDF284 kB
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Designing Power Supplies for High Speed ADC2/1/2012
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Discrete- and Integrated Control of Power Amplifiers in Base-Station Applications4/1/2008 Analog Dialogue
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Ask The Applications Engineer—38: Better, Faster Open-Loop Gain Measurement11/1/2007 Analog Dialogue
Software & Systems Requirements
Evaluation Software
Device Drivers
Reference Designs (2)
Product Recommendations
AD7992 Companion Parts
Recommended External References - 2.5V
- For cost sensitive applications: AD1582, ADR381, ADR391.
- For applications requiring 2.048V to 4.096V: REF191.
- For wide supply applications: AD780, ADR03, AD780.
- For applications requiring best accuracy, low noise, low drift: ADR421, AD780, AD780.
- For the reference buffer amplifier: AD8605, AD8605.
- For low noise, high output current applications: ADR431.
Recommended Input Buffer Amplifiers
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD7992BRMZ-0 | Material Declaration | Reliability Data | 10-Lead MSOP | |
| AD7992BRMZ-0REEL | Material Declaration | Reliability Data | 10-Lead MSOP | |
| AD7992BRMZ-1 | Material Declaration | Reliability Data | 10-Lead MSOP | |
| AD7992BRMZ-1REEL | Material Declaration | Reliability Data | 10-Lead MSOP | |
| Wafer Fabrication Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.