Datasheet > AD7903

AD7903

更新时间： 2024-11-21 01:09:55

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
29页	1230K
描述
Dual Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP

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AD7903 数据手册

Dual Differential 16-Bit, 1 MSPS

PulSAR ADC 12.0 mW in QSOP

Data Sheet

AD7903

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: 0.5 LSB typical, 2.0 LSB maximum

SINAD: 93.5 dB at 1 kHz

THD: −112 dB at 1 kHz

The AD7903 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 AD7903 samples the voltage

difference between the INx+ and INx− pins. The voltages on

these pins usually swing in opposite phases between 0 V and

_REF. The externally applied reference voltage of the REFx pins

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

True differential analog input range: V_REF

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 ADA4941-1

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

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 AD7903 is available in a 20-lead QSOP package with operation

specified from −40°C to +125°C.

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

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

100

250

400 kSPS

1000

ADC

Bits kSPS

kSPS

to 500 kSPS kSPS

Driver

APPLICATIONS

AD7691¹AD7690¹

AD7982¹

ADA4941-1

ADA4841-x

ADA4941-1

ADA4841-x

Battery-powered equipment

Communications

Automated test equipment (ATE)

Data acquisition

Medical instrumentation

Redundant measurement

Simultaneous sampling

AD7680 AD7685¹AD7686¹

AD7683 AD7687¹AD7688¹

AD7980¹

AD7903

AD7902

AD7684 AD7694

AD7940 AD7942¹AD7946¹

AD7693¹

¹Pin-for-pin compatible.

FUNCTIONAL BLOCK DIAGRAM

REF = 2.5V TO 5V

2.5V

REF1 REF2 VDD1 VDD2

ADA4941-1

VIO1

SDI1

VIO1/VIO2

REF

IN1+

SDI1/SDI2

SCK1/SCK2

CNV1/CNV2

SDO1

SCK1

CNV1

SDO1

ADC1

IN1–

±10V, ±5V, ...

VIO2

SDI2

3-WIRE OR 4-WIRE

INTERFACE

REF

IN2+

(SPI, CS, AND

CHAIN MODES)

SCK2

CNV2

SDO2

ADC2

IN2–

±10V, ±5V, ...

SDO2

GND

AD7903

Figure 1.

Rev. A

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

rights of third parties that may result from its 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 and registered trademarks 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AD7903相关器件

型号	品牌	获取价格	描述	数据表
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
AD7904BRUZ	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRUZ	ROCHESTER	获取价格	4-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16, ROHS COMPLIANT, MO-153AB,
AD7904BRUZ-REEL	ADI	获取价格	4-Channel, 1 MSPS, 8-/10-/12-Bit ADCs with Sequencer in 16-Lead TSSOP
AD7904BRUZ-REEL	ROCHESTER	获取价格	4-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16, ROHS COMPLIANT, MO-153AB,

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