AD7902
Dual Pseudo Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP
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Features
- 16-bit resolution with no missing codes
- Throughput: 1 MSPS
- Lowpower dissipation
7.0 mW at 1 MSPS (VDD1 and VDD2 only)
12.0 mW at 1 MSPS (total)
140 µW at 10 kSPS - INL: ±1.0 LSB typical, ±2.5 LSB maximum
- Pseudodifferential analog input range
0 V to VREF with VREF between
2.4 V to 5.1 V
Allows use of any input range
Easy to drive with the ADA4841-1/ADA4841-2
- SINAD: 91 dB at 1 kHz
- THD: −105 dB at 1 kHz
- No pipeline delay
- Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
- Serial port interface (SPI) QSPI/MICROWIRE/DSP compatible
- 20-lead QSOP package
- Wide operating temperature range: −40°C to +125°C
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The AD7902 is a dual 16-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDDx, per ADC. It contains two low power, high speed, 16-bit sampling ADCs and a versatile serial port interface (SPI). On the CNVx rising edge, the AD7902 samples an analog input, IN+ in the range of 0 V to VREF with respect to a ground sense, IN−. The externally applied reference voltage of the REFx pins (VREF) can be set independently from the supply voltage pins, VDDx. The power of the device scales linearly with throughput.
Using the SDIx inputs, the SPI-compatible serial interface can also daisy-chain multiple ADCs on a single 3-wire bus and provide an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate VIOx supplies.
The AD7902 is available in a 20-lead QSOP package with operation specified from −40°C to +125°C.
APPLICATIONS
- Battery-powered equipment
- Communications
- Automated test equipment (ATE)
- Data acquisition
- Medical instrumentation
- Redundant measurement
- Simultaneous sampling
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AD7902
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Product Highlight 1
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 |
|---|---|---|---|
| AD7902BRQZ |
20-Lead QSOP
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| AD7902BRQZ-RL7 |
20-Lead QSOP
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- AD7902BRQZ
- Pin/Package Drawing
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20-Lead QSOP
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- AD7902BRQZ-RL7
- Pin/Package Drawing
-
20-Lead QSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
Software & Part Ecosystem
| Parts | Product Life Cycle | Description | ||
|---|---|---|---|---|
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High Speed Op Amps (Bandwidth ≥ 50MHz)2 |
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RECOMMENDED FOR NEW DESIGNS |
3.1 nV/√Hz, 1 mA, 180 MHz, Rail-to-Rail Input/Output Amplifier |
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RECOMMENDED FOR NEW DESIGNS |
3.1 nV/√Hz, 1 mA, 180 MHz, Rail-to-Rail Input/Output Amplifier |
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Low Input Bias Current Op Amps (≤100 pA)3 |
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PRODUCTION |
36 V, 19 MHz, Low Noise, Low Bias Current, JFET Op Amp |
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PRODUCTION |
30 V, 80 MHz, Low Noise, Low Bias Current, JFET Op Amp |
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PRODUCTION |
Precision, Low Input Bias Current, Wide BW JFET Single Op Amp |
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Low Noise Op Amps (≤ 10nV/√Hz)2 |
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RECOMMENDED FOR NEW DESIGNS |
1 nV/√Hz, Low Power, Rail-to-Rail Output Amplifiers |
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RECOMMENDED FOR NEW DESIGNS |
1 nV/√Hz, Low Power Operational Amplifier |
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Low Power Op Amps (≤ 1mA/amp) 1 |
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PRODUCTION |
2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Single Amplifier |
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Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C)5 |
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RECOMMENDED FOR NEW DESIGNS |
0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifier |
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RECOMMENDED FOR NEW DESIGNS |
Dual, 0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifier |
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PRODUCTION |
Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
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PRODUCTION |
Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
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PRODUCTION |
Precision, Low Noise, CMOS, RRIO Op Amp (single) |
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Series Voltage References6 |
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PRODUCTION |
Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
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RECOMMENDED FOR NEW DESIGNS |
Ultra-Low-Noise, High-Accuracy 5.0V Voltage Reference |
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PRODUCTION |
Ultralow Noise XFET® 3.0V Voltage Reference w/Current Sink and Source Capability |
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RECOMMENDED FOR NEW DESIGNS |
Ultra-Low-Noise, High-Accuracy 3.3V Voltage Reference |
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PRODUCTION |
Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
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RECOMMENDED FOR NEW DESIGNS |
Ultra-Low-Noise, High-Accuracy 2.5V Voltage Reference |
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Standard Digital Isolators4 |
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PRODUCTION |
Quad-Channel Digital Isolator (3/1 Channel Directionality) |
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PRODUCTION |
Small, 3.75 kV RMS Quad Digital Isolators (3/1 Channel Directionality) |
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PRODUCTION |
Quad-Channel, Digital Isolator, Enhanced System-Level ESD Reliability |
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PRODUCTION |
5 kV RMS Quad-Channel Digital Isolators |
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Can't find the software or driver you need?
Request a Driver/SoftwareEvaluation Kits 1
EVAL-AD7902
AD7902 Evaluation Board
Product Detail
The evaluation board is ideal for use with the Analog Devices, Inc., system demonstration platform (SDP) board, EVAL-SDP-CB1Z. The evaluation board interfaces to the SDP board via a 120-pin connector. SMA Connectors J6, J10, J14, and J15 are provided to connect a low noise analog signal source.
The user PC software executable controls the evaluation board over the USB through the SDP board, EVAL-SDP-CB1Z.
On-board components include the following:
ADR435: high precision, buffered band gap 5.0 V reference
AD8031: reference buffer
ADA4841-1: signal conditioning circuit with op amps
ADP7104 and ADP2301: regulators to derive necessary voltage
levels on board
- Full featured evaluation board for the AD7902
- Versatile analog signal conditioning circuitry
- On-board reference, reference buffers, and ADC drivers
- System demonstration board compatible (EVAL-SDP-CB1Z)
- PC software for control and data analysis of time and frequency domain
Resources
Evaluation Kits1
Tools & Simulations 2
Precision ADC Driver Tool
IBIS Model 1
IBIS Model
