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AD7902BRQZ

更新时间： 2024-10-01 01:12:31
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Dual Pseudo Differential 16-Bit, 1 MSPS PulSAR ADC 12.0 mW in QSOP

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AD7902BRQZ 数据手册

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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 (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  
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 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.  
Pseudo differential 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  
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  
18  
AD76911 AD76901  
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  
16  
AD7680  
AD7683  
AD7684  
AD7940  
AD76851 AD76861  
AD76871 AD76881  
AD7694  
AD79421 AD79461  
AD79801  
AD7903  
AD7902  
AD76931  
14  
1 Pin-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.  
Tel: 781.329.4700 ©2014–2015 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
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AD7902BRQZ 替代型号

型号 品牌 替代类型 描述 数据表
AD7902BRQZ-RL7 ADI

完全替代

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

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