AD7607 Analog Devices, AD7607 Datasheet - Page 22

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AD7607

Manufacturer Part Number
AD7607
Description
8-Channel DAS with 14-Bit, Bipolar, Simultaneous Sampling ADC
Manufacturer
Analog Devices
Datasheet

Specifications of AD7607

Resolution (bits)
14bit
# Chan
8
Sample Rate
200kSPS
Interface
Par,Ser,SPI
Analog Input Type
SE-Bip
Ain Range
Bip 10V,Bip 5.0V
Adc Architecture
SAR
Pkg Type
QFP

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AD7607
TYPICAL CONNECTION DIAGRAM
Figure 39 shows the typical connection diagram for the AD7607.
There are four AVCC supply pins on the part, and each of the
four pins should be decoupled using a 100 nF capacitor at each
supply pin and a 10 µF capacitor at the supply source. The AD7607
can operate with the internal reference or an externally applied
reference. In this configuration, the AD7607 is configured to
operate with the internal reference. When using a single AD7607
device on the board, the REFIN/REFOUT pin should be decoupled
with a 10 µF capacitor. When using an application with multiple
AD7607 devices, refer to the Internal/External Reference section.
The REFCAPA and REFCAPB pins are shorted together and
decoupled with a 10 µF ceramic capacitor.
The V
processor. The V
output logic signals. For layout, decoupling, and grounding
hints, see the Layout Guidelines section.
POWER-DOWN MODES
Two power-down modes are available on the AD7607: standby
mode and shutdown mode. The STBY pin controls whether
the AD7607 is in normal mode or in one of the two power-
down modes.
DRIVE
supply is connected to the same supply as the
DRIVE
voltage controls the voltage value of the
1
2
INPUTS V1 TO V8
DECOUPLING SHOWN ON THE AV
DECOUPLING CAPACITOR CAN BE SHARED BETWEEN AV
DECOUPLING SHOWN ON THE REGCAP PIN APPLIES TO EACH REGCAP PIN (PIN 36, PIN 39).
EIGHT ANALOG
10µF
+
10µF
REFIN/REFOUT
REFCAPA
REFCAPB
REFGND
V1
V1GND
V2
V2GND
V3
V3GND
V4
V4GND
V5
V5GND
V6
V6GND
V7
V7GND
V8
V8GND
+
Figure 39. Typical Connection Diagram
CC
PIN APPLIES TO EACH AV
1µF
Rev. B | Page 22 of 32
AD7607
REGCAP
AGND
100nF
CONVST A, CONVST B
ANALOG SUPPLY
2
VOLTAGE 5V
AV
PAR/SER SEL
The power-down mode is selected through the state of the RANGE
pin when the STBY pin is low. Table 7 shows the configurations
required to choose the desired power-down mode. When the
AD7607 is placed in standby mode, current consumption is 8 mA
maximum and power-up time is approximately 100 µs because
the capacitor on the REFCAPA and REFCAPB pins must charge
up. In standby mode, the on-chip reference and regulators
remain powered up, and the amplifiers and ADC core are
powered down.
When the AD7607 is placed in shutdown mode, current
consumption is 6 µA maximum and power-up time is
approximately 13 ms (external reference mode). In shutdown
mode, all circuitry is powered down. When the AD7607 is
powered up from shutdown mode, a RESET signal must be
applied to the AD7607 after the required power-up time has
elapsed.
Table 7. Power-Down Mode Selection
Power-Down Mode
Standby
Shutdown
DB0 TO DB15
CC
REF SELECT
CC
PIN 37 AND PIN 38.
CC
RANGE
RESET
V
BUSY
STBY
PIN (PIN 1, PIN 37, PIN 38, PIN 48).
1
OS 2
OS 1
OS 0
DRIVE
CS
RD
DIGITAL SUPPLY
VOLTAGE +2.3V TO +5V
100nF
INTERFACE
PARALLEL
OVERSAMPLING
V
DRIVE
V
DRIVE
STBY
0
0
Data Sheet
RANGE
1
0

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