8-/6-/4-Channel DAS with 16-Bit, Bipolar
Input, Simultaneous Sampling ADC
AD7606/AD7606-6/AD7606-4
APPꢀICATIONS
FEATURES
8/6/4 simultaneously sampled inputs
True bipolar analog input ranges: ±10 V, ±± V
Single ± V analog supply and 2.3 V to ± V VDRIVE
Fully integrated data acquisition solution
Analog input clamp protection
Power-line monitoring and protection systems
Multiphase motor control
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
16-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
9±.± dB SNR, −107 dB THD
Table 1. High Resolution, Bipolar Input, Simultaneous
Sampling DAS Solutions
Single-
Ended
Inputs
True
Number of
Differential Simultaneous
Inputs
Resolution
18 Bits
Sampling Channels
AD7608
AD7606
AD7606-6
AD7606-4
AD7607
AD7609
8
8
6
4
8
16 Bits
14 Bits
±0.± ꢀSB INꢀ, ±0.± ꢀSB DNꢀ
ꢀow power: 100 mW
Standby mode: 2± mW
64-lead ꢀQFP package
FUNCTIONAꢀ BꢀOCK DIAGRAM
AVCC
AVCC
REGCAP REGCAP
REFCAPB REFCAPA
RFB
1MΩ
V1
CLAMP
CLAMP
T/H
SECOND-
ORDER LPF
V1GND
2.5V
LDO
2.5V
LDO
RFB
RFB
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
RFB
RFB
1MΩ
1MΩ
REF SELECT
AGND
2.5V
REF
V3
CLAMP
CLAMP
OS 2
OS 1
OS 0
SECOND-
ORDER LPF
V3GND
RFB
RFB
1MΩ
1MΩ
V4
CLAMP
CLAMP
DOUT
DOUT
A
B
SECOND-
ORDER LPF
V4GND
SERIAL
RFB
RFB
1MΩ
1MΩ
8:1
MUX
PARALLEL/
SERIAL
RD/SCLK
CS
DIGITAL
16-BIT
SAR
V5
CLAMP
CLAMP
FILTER
INTERFACE
SECOND-
ORDER LPF
V5GND
RFB
RFB
1MΩ
1MΩ
PAR/SER/BYTE SEL
VDRIVE
V6
CLAMP
CLAMP
SECOND-
ORDER LPF
PARALLEL
DB[15:0]
V6GND
RFB
RFB
1MΩ
1MΩ
AD7606
V7
CLAMP
CLAMP
SECOND-
ORDER LPF
V7GND
CLK OSC
RFB
RFB
1MΩ
1MΩ
BUSY
CONTROL
INPUTS
V8
CLAMP
CLAMP
SECOND-
ORDER LPF
FRSTDATA
V8GND
RFB
1MΩ
AGND
CONVST A CONVST B RESET RANGE
Figure 1.
Rev. 0
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
Fax: 781.461.3113
www.analog.com
©2010 Analog Devices, Inc. All rights reserved.