AD7607 Datasheet, PDF (1/32 Pages) Analog Devices – 8-Channel DAS with 14-Bit, Bipolar Input, Simultaneous Sampling ADC

Data Sheet
8-Channel DAS with 14-Bit, Bipolar Input,
Simultaneous Sampling ADC
AD7607
FEATURES
8 simultaneously sampled inputs
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
14-bit ADC with 200 kSPS on all channels
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
Fast throughput rate: 200 kSPS for all channels
85.5 dB SNR at 50 kSPS
INL ±0.25 LSB, DNL ±0.25 LSB
Low power: 100 mW at 200 kSPS
Standby mode: 25 mW typical
64-lead LQFP package
APPLICATIONS
Power-line monitoring and protection systems
Multiphase motor control
Instrumentation and control systems
Multiaxis positioning systems
Data acquisition systems (DAS)
Table 1. High Resolution, Bipolar Input, Simultaneous
Sampling DAS Solutions
Resolution
Single-Ended
Inputs
Number of Simultaneous
Sampling Channels
18 Bits
AD7608
8
16 Bits
AD7606
8
AD7606-6
6
AD7606-4
4
14 Bits
AD7607
8
V1
V1GND
V2
V2GND
V3
V3GND
V4
V4GND
V5
V5GND
V6
V6GND
V7
V7GND
V8
V8GND
1MΩ
CLAMP
CLAMP
1MΩ
CLAMP ^1MΩ
CLAMP
1MΩ
CLAMP ^1MΩ
CLAMP
1MΩ
CLAMP ^1MΩ
CLAMP
1MΩ
1MΩ
CLAMP
CLAMP
1MΩ
CLAMP ^1MΩ
CLAMP
1MΩ
CLAMP ^1MΩ
CLAMP
1MΩ
CLAMP ^1MΩ
CLAMP
1MΩ
FUNCTIONAL BLOCK DIAGRAM
AV_CC
AV_CC
REGCAP REGCAP REFCAPB REFCAPA
R_FB
SECOND- ^T/H
R_FB ^{ORDER LPF}
R_FB
SECOND- ^T/H
R_FB ^{ORDER LPF}
R_FB
SECOND- ^T/H
R_FB ^{ORDER LPF}
R_FB
SECOND- ^T/H
R_FB ^{ORDER LPF}
R_FB
SECOND- ^T/H
R_FB ^{ORDER LPF}
R_FB
SECOND- ^T/H
R_FB ^{ORDER LPF}
R_FB
SECOND- ^T/H
R_FB ^{ORDER LPF}
R_FB
SECOND- ^T/H
R_FB ^{ORDER LPF}
2.5V
LDO
2.5V
LDO
2.5V
REF
8:1
MUX
14-BIT
SAR
SERIAL
DIGITAL
FILTER
PARALLEL/
SERIAL
INTERFACE
AD7607
CLK OSC
CONTROL
INPUTS
PARALLEL
AGND
CONVST A CONVST B RESET RANGE
Figure 1.
REFIN/REFOUT
REF SELECT
AGND
OS 2
OS 1
OS 0
D_OUTA
D_OUTB
RD/SCLK
CS
PAR/SER/BYTE SEL
V_DRIVE
DB[15:0]
BUSY
FRSTDATA
Rev. B
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