Data Sheet
FEATURES
8 simultaneously sampled inputs
True differential inputs
True bipolar analog input ranges: ±10 V, ±5 V
Single 5 V analog supply and 2.3 V to 5.25 V V
DRIVE
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
8-Channel Differential DAS with 18-Bit,
Bipolar, Simultaneous Sampling ADC
APPLICATIONS
Power line monitoring and protection systems
Multiphase motor control
Instrumentation and control systems
Multiaxis positioning systems
Data acquisition systems (DAS)
COMPANION PRODUCTS
External References:
Digital Isolators:
Power:
Additional companion products on the
Table 1. High Resolution, Bipolar Input, Simultaneous
Sampling DAS Solutions
Resolution
18 Bits
16 Bits
Single-
Ended
Inputs
True
Differential
Inputs
Number of
Simultaneous
Sampling Channels
8
8
6
4
8
14 Bits
1
Patent pending.
FUNCTIONAL BLOCK DIAGRAM
AV
CC
AV
CC
REGCAP
REGCAP
REFCAPB
REFCAPA
V1+
V1–
CLAMP
CLAMP
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
R
FB
SECOND-
ORDER LPF
SECOND-
ORDER LPF
SECOND-
ORDER LPF
SECOND-
ORDER LPF
SECOND-
ORDER LPF
SECOND-
ORDER LPF
SECOND-
ORDER LPF
SECOND-
ORDER LPF
T/H
2.5V
LDO
2.5V
LDO
REFIN/REFOUT
V2+
V2–
CLAMP
CLAMP
T/H
2.5V
REF
REF SELECT
AGND
OS 2
OS 1
OS 0
V3+
V3–
CLAMP
CLAMP
T/H
V4+
V4–
CLAMP
CLAMP
T/H
8:1
MUX
T/H
SERIAL
18-BIT
SAR
DIGITAL
FILTER
PARALLEL/
SERIAL
INTERFACE
D
OUT
A
D
OUT
B
RD/SCLK
CS
PAR/SER SEL
V
DRIVE
V5+
V5–
CLAMP
CLAMP
V6+
V6–
CLAMP
CLAMP
T/H
PARALLEL
DB[15:0]
V7+
V7–
AD7609
T/H
CLK OSC
CONTROL
INPUTS
BUSY
FRSTDATA
09760-001
CLAMP
CLAMP
V8+
V8–
CLAMP
CLAMP
T/H
AGND
CONVST A CONVST B RESET RANGE
Figure 1.
Rev. A
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