AD7902 Series

Dual Pseudo Differential 16-Bit, 1 MSPS PulSAR ADC 12.0mW in QSOP

Catalog

Dual Pseudo Differential 16-Bit, 1 MSPS PulSAR ADC 12.0mW in QSOP

Part	Number of Inputs	Package / Case [custom]	Package / Case	Package / Case [custom]	Ratio - S/H:ADC	Mounting Type	Configuration	Sampling Rate (Per Second)	Features	Number of Bits	Data Interface	Operating Temperature [Max]	Operating Temperature [Min]	Number of A/D Converters	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Supplier Device Package	Architecture	Input Type	Reference Type	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Contents	Power (Typ) @ Conditions	Utilized IC / Part	Input Range [Max]	Input Range [Min]
Analog Devices AD7902BRQZ-RL7	2	0.154 in	20-SSOP	3.9 mm	1:1	Surface Mount	S/H-ADC	1 M	Simultaneous Sampling	16	DSP SPI	125 °C	-40 °C	2	2.625 V	2.375 V	20-QSOP	SAR	Pseudo-Differential	External	2.375 V	2.625 V
Analog Devices AD7902BRQZ	2	0.154 in	20-SSOP	3.9 mm	1:1	Surface Mount	S/H-ADC	1 M	Simultaneous Sampling	16	DSP SPI	125 °C	-40 °C	2	2.625 V	2.375 V	20-QSOP	SAR	Pseudo-Differential	External	2.375 V	2.625 V
Analog Devices EVAL-AD7902SDZ								1 M		16	DSP MICROWIRE™ QSPI™ Serial SPI™			2									Board(s) Power Supply	12 mW	AD7902	VREF	0

Catalog

Dual Pseudo Differential 16-Bit, 1 MSPS PulSAR ADC 12.0mW in QSOP

Key Features

• 16-bit resolution with no missing codes

• Throughput: 1 MSPS

• Lowpower dissipation7.0 mW at 1 MSPS (VDD1and VDD2only)12.0 mW at 1 MSPS (total)140 µW at 10 kSPS

• INL: ±1.0 LSB typical, ±2.5 LSB maximum

• Pseudodifferential analog input range0 V to VREFwith VREFbetween2.4 V to 5.1 VAllows use of any input rangeEasy 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

Description

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 VREFwith 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.APPLICATIONSBattery-powered equipmentCommunicationsAutomated test equipment (ATE)Data acquisitionMedical instrumentationRedundant measurementSimultaneous sampling