Datasheet > AD7902_17

AD7902_17

更新时间： 2024-11-21 01:12:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
29页	681K
描述
Dual Pseudo Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP

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AD7902_17 数据手册

Dual Pseudo Differential 16-Bit, 1 MSPS

PulSAR ADC 12.0 mW in QSOP

Data Sheet

AD7902

FEATURES

GENERAL DESCRIPTION

16-bit resolution with no missing codes

Throughput: 1 MSPS

Low power dissipation

7.0 mW at 1 MSPS (V_DD1and V_DD2only)

12.0 mW at 1 MSPS (total)

140 µW at 10 kSPS

INL: 1.0 LSB typical, 2.5 LSB maximum

SINAD: 91 dB at 1 kHz

THD: −105 dB at 1 kHz

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 V_REFwith respect to a ground sense,

IN−. The externally applied reference voltage of the REFx pins

(V_REF) can be set independently from the supply voltage pins,

VDDx. The power of the device scales linearly with throughput.

Pseudo differential analog input range

0 V to V_REFwith V_REFbetween 2.4 V to 5.1 V

Allows use of any input range

Easy to drive with the ADA4841-1/ADA4841-2

No pipeline delay

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.

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

Table 1. MSOP 14-/16-/18-Bit PulSAR® ADCs

400 kSPS

Bits 100 kSPS

250 kSPS to 500 kSPS 1000 kSPS ADC Driver

Wide operating temperature range: −40°C to +125°C

AD7691¹AD7690¹

AD7982¹

ADA4941-1

ADA4841-1

ADA4841-2

ADA4941-1

ADA4841-1

ADA4841-2

APPLICATIONS

Battery-powered equipment

Communications

Automated test equipment (ATE)

Data acquisition

Medical instrumentation

Redundant measurement

Simultaneous sampling

AD7680

AD7683

AD7684

AD7940

AD7685¹AD7686¹

AD7687¹AD7688¹

AD7694

AD7942¹AD7946¹

AD7980¹

AD7903

AD7902

AD7693¹

¹Pin-for-pin compatible.

FUNCTIONAL BLOCK DIAGRAM

REF = 2.5V TO 5V

2.5V

REF1 REF2 VDD1 VDD2

VIO1

SDI1

VIO1/VIO2

0V TO VREF

IN1+

SDI1/SDI2

SCK1/SCK2

CNV1/CNV2

SDO1

SCK1

CNV1

SDO1

ADC1

IN1–

VIO2

SDI2

3-WIRE OR 4-WIRE

INTERFACE

0V TO VREF

IN2+

(SPI, CS, AND

CHAIN MODES)

SCK2

CNV2

SDO2

ADC2

IN2–

SDO2

GND

AD7902

Figure 1.

Rev. B

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

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与AD7902_17相关器件

型号	品牌	获取价格	描述	数据表
AD79024	ADI	获取价格	LC2MOS 20-Bit Data Acquisition System
AD7902BRQZ	ADI	获取价格	Dual Pseudo Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP
AD7902BRQZ-RL7	ADI	获取价格	Dual Pseudo Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP
AD7903	ADI	获取价格	Dual Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP
AD7903BRQZ	ADI	获取价格	Dual Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP
AD7903BRQZ-RL7	ADI	获取价格	Dual Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP
AD7904	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRU	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRU-REEL	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRU-REEL7	ADI	获取价格	IC 4-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16, MO-153AB, TSSOP-16, Ana

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