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AD7608BSTZ

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32页 684K
描述
8-Channel DAS with 18-Bit, Bipolar, Simultaneous Sampling ADC

AD7608BSTZ 数据手册

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8-Channel DAS with 18-Bit, Bipolar,  
Simultaneous Sampling ADC  
Data Sheet  
AD7608  
FEATURES  
APPLICATIONS  
8 simultaneously sampled inputs  
True bipolar analog input ranges: ±10 V, ±± V  
Single ± V analog supply and 2.3 V to ±.2± V VDRIVE  
Fully integrated data acquisition solution  
Analog input clamp protection  
Power line monitoring and protection systems  
Multiphase motor controls  
Instrumentation and control systems  
Multiaxis positioning systems  
Data acquisition systems (DAS)  
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  
Pin compatible solutions from 14-bits to 18-bits  
Performance  
7 kV ESD rating on analog input channels  
98 dB SNR, −107 dB THD  
Low power: 100 mW  
Standby mode: 2± mW  
64-lead LQFP package  
COMPANION PRODUCTS  
External References: ADR421, ADR431  
Digital Isolators: ADuM1402, ADuM±000, ADuM±402  
Voltage Regulator Design Tool: ADIsimPower, Supervisor  
Parametric Search  
Complete list of complements on AD7608 product page  
Table 1. High Resolution, Bipolar Input, Simultaneous  
Sampling DAS Solutions  
Single-  
Ended  
Resolution Inputs  
True  
Number of  
Differential Simultaneous  
Inputs  
Sampling Channels  
18 Bits  
16 Bits  
AD76081  
AD7606  
AD7609  
8
8
6
4
8
AD7606-6  
AD7606-4  
AD7607  
14 Bits  
FUNCTIONAL BLOCK DIAGRAM  
AV  
CC  
AV  
CC  
REGCAP REGCAP REFCAPB REFCAPA  
R
1M  
FB  
V1  
CLAMP  
CLAMP  
T/H  
SECOND  
ORDER LPF  
V1GND  
2.5V  
LDO  
2.5V  
LDO  
R
R
FB  
FB  
1MΩ  
1MΩ  
REFIN/REFOUT  
V2  
CLAMP  
CLAMP  
T/H  
T/H  
T/H  
T/H  
T/H  
T/H  
T/H  
SECOND  
V2GND  
ORDER LPF  
R
R
FB  
FB  
1MΩ  
1MΩ  
REF SELECT  
AGND  
2.5V  
REF  
V3  
CLAMP  
CLAMP  
OS 2  
OS 1  
OS 0  
SECOND  
ORDER LPF  
V3GND  
R
R
FB  
FB  
1MΩ  
1MΩ  
V4  
CLAMP  
CLAMP  
D
D
A
B
SECOND  
ORDER LPF  
OUT  
V4GND  
SERIAL  
R
R
FB  
FB  
1MΩ  
1MΩ  
OUT  
8:1  
MUX  
PARALLEL/  
SERIAL  
RD/SCLK  
CS  
DIGITAL  
FILTER  
18-BIT  
SAR  
V5  
CLAMP  
CLAMP  
INTERFACE  
SECOND  
ORDER LPF  
V5GND  
R
R
FB  
FB  
1MΩ  
1MΩ  
PAR/SER SEL  
V
DRIVE  
V6  
CLAMP  
CLAMP  
SECOND  
ORDER LPF  
PARALLEL  
DB[15:0]  
V6GND  
R
R
FB  
FB  
1MΩ  
1MΩ  
AD7608  
V7  
CLAMP  
CLAMP  
SECOND  
ORDER LPF  
V7GND  
CLK OSC  
R
R
FB  
FB  
1MΩ  
1MΩ  
BUSY  
CONTROL  
INPUTS  
V8  
CLAMP  
CLAMP  
SECOND  
ORDER LPF  
FRSTDATA  
V8GND  
R
FB  
1MΩ  
AGND  
CONVST A CONVST B RESET RANGE  
Figure 1.  
1 Patent pending.  
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 registeredtrademarks arethe 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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