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AD7609

更新时间： 2024-11-05 08:17:07
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亚德诺 - ADI /
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36页 788K
描述
8-Channel Differential DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC

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AD7609 数据手册

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8-Channel Differential DAS with 18-Bit,  
Bipolar, Simultaneous Sampling ADC  
Data Sheet  
AD7609  
FEATURES  
APPLICATIONS  
8 simultaneously sampled inputs  
True differential inputs  
Power line monitoring and protection systems  
Multiphase motor control  
True bipolar analog input ranges: 10 V, 5 V  
Single 5 V analog supply and 2.3 V to 5.25 V VDRIVE  
Fully integrated data acquisition solution  
Analog input clamp protection  
Input buffer with 1 MΩ analog input impedance  
Second-order antialiasing analog filter  
On-chip accurate reference and reference buffer  
18-bit ADC with 200 kSPS on all channels  
Oversampling capability with digital filter  
Flexible parallel/serial interface  
SPI/QSPI™/MICROWIRE™/DSP compatible  
Performance  
7 kV ESD rating on analog input channels  
98 dB SNR, −107 dB THD  
Dynamic range: up to 105 dB typical  
Low power: 100 mW  
Standby mode: 25 mW  
64-lead LQFP package  
Instrumentation and control systems  
Multiaxis positioning systems  
Data acquisition systems (DAS)  
COMPANION PRODUCTS  
External References: ADR421, ADR431  
Digital Isolators: ADuM1402, ADuM5000, ADuM5402  
Power: ADIsimPower, Supervisor Parametric Search  
Additional companion products on the AD7609 product page  
Table 1. High Resolution, Bipolar Input, Simultaneous  
Sampling DAS Solutions  
Single-  
Ended  
Inputs  
True  
Number of  
Differential Simultaneous  
Inputs  
AD76091  
Resolution  
18 Bits  
16 Bits  
Sampling Channels  
AD7608  
AD7606  
AD7606-6  
AD7606-4  
AD7607  
8
8
6
4
8
14 Bits  
1 Patent pending.  
FUNCTIONAL BLOCK DIAGRAM  
AVCC  
AVCC  
REGCAP REGCAP REFCAPB REFCAPA  
RFB  
1MΩ  
V1+  
V1–  
CLAMP  
CLAMP  
T/H  
SECOND-  
ORDER LPF  
2.5V  
LDO  
2.5V  
LDO  
RFB  
RFB  
1MΩ  
1MΩ  
REFIN/REFOUT  
V2+  
V2–  
CLAMP  
CLAMP  
T/H  
T/H  
T/H  
T/H  
T/H  
T/H  
T/H  
SECOND-  
ORDER LPF  
RFB  
RFB  
1MΩ  
1MΩ  
REF SELECT  
AGND  
2.5V  
REF  
V3+  
V3–  
CLAMP  
CLAMP  
OS 2  
OS 1  
OS 0  
SECOND-  
ORDER LPF  
RFB  
RFB  
1MΩ  
1MΩ  
V4+  
V4–  
CLAMP  
CLAMP  
DOUT  
A
SECOND-  
ORDER LPF  
SERIAL  
RFB  
RFB  
1MΩ  
1MΩ  
DOUTB  
8:1  
MUX  
PARALLEL/  
SERIAL  
RD/SCLK  
CS  
DIGITAL  
FILTER  
18-BIT  
SAR  
V5+  
V5–  
CLAMP  
CLAMP  
INTERFACE  
SECOND-  
ORDER LPF  
RFB  
RFB  
1MΩ  
1MΩ  
PAR/SER SEL  
VDRIVE  
V6+  
V6–  
CLAMP  
CLAMP  
SECOND-  
ORDER LPF  
PARALLEL  
DB[15:0]  
RFB  
RFB  
1MΩ  
1MΩ  
AD7609  
V7+  
V7–  
CLAMP  
CLAMP  
SECOND-  
ORDER LPF  
CLK OSC  
RFB  
RFB  
1MΩ  
1MΩ  
BUSY  
CONTROL  
INPUTS  
V8+  
V8–  
CLAMP  
CLAMP  
SECOND-  
ORDER LPF  
FRSTDATA  
RFB  
1MΩ  
AGND  
CONVST A CONVST B RESET RANGE  
Figure 1.  
Rev. A  
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.  
Tel: 781.329.4700 www.analog.com  
Fax: 781.461.3113 ©2011–2012 Analog Devices, Inc. All rights reserved.  
 
 
 
 
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