AD7606/AD7606-6/AD7606-4
The power-down mode is selected through the state of the
TYPICAꢀ CONNECTION DIAGRAM
STBY
RANGE pin when the
pin is low. Table 7 shows the
Figure 43 shows the typical connection diagram for the AD7606/
AD7606-6/AD7606-4. 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 AD7606/AD7606-6/AD7606-4 can operate with the
internal reference or an externally applied reference. In this
configuration, the AD7606 is configured to operate with the
internal reference. When using a single AD7606/AD7606-6/
AD7606-4 device on the board, the REFIN/REFOUT pin
should be decoupled with a 10 μF capacitor. Refer to the
Internal/External Reference section when using an application
with multiple AD7606/AD7606-6/AD7606-4 devices. The
REFCAPA and REFCAPB pins are shorted together and
decoupled with a 10 μF ceramic capacitor.
configurations required to choose the desired power-down mode.
When the AD7606/AD7606-6/AD7606-4 are placed in standby
mode, the 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 AD7606/AD7606-6/AD7606-4 are placed in shutdown
mode, the current consumption is 6 μA maximum and power-up
time is approximately 13 ms (external reference mode). In shut-
down mode, all circuitry is powered down. When the AD7606/
AD7606-6/AD7606-4 are powered up from shutdown mode,
a RESET signal must be applied to the AD7606/AD7606-6/
AD7606-4 after the required power-up time has elapsed.
The VDRIVE supply is connected to the same supply as the
processor. The VDRIVE voltage controls the voltage value of the
output logic signals. For layout, decoupling, and grounding
hints, see the Layout Guidelines section.
Table 7. Power-Down Mode Selection
STBY
Power-Down Mode
Standby
Shutdown
RANGE
0
0
1
0
POWER-DOWN MODES
Two power-down modes are available on the AD7606/AD7606-6/
STBY
AD7606-4: standby mode and shutdown mode. The
pin
controls whether the AD7606/AD7606-6/AD7606-4 are in
normal mode or in one of the two power-down modes.
ANALOG SUPPLY
VOLTAGE 5V1
DIGITAL SUPPLY
VOLTAGE +2.3V TO +5.25V
+
1µF
10µF
100nF
100nF
2
AV
V
DRIVE
REFIN/REFOUT
REFCAPA
REGCAP
CC
PARALLEL
INTERFACE
+
DB0 TO DB15
10µF
REFCAPB
REFGND
CONVST A, CONVST B
CS
RD
BUSY
V1
V1GND
V2
V2GND
V3
V3GND
V4
AD7606
RESET
OS 2
OS 1
OS 0
OVERSAMPLING
EIGHT ANALOG
INPUTS V1 TO V8
V4GND
V5
REF SELECT
PAR/SER SEL
V
DRIVE
V5GND
V6
V6GND
V7
V7GND
V8
V8GND
RANGE
STBY
V
DRIVE
AGND
1
DECOUPLING SHOWN ON THE AV PIN APPLIES TO EACH AV PIN (PIN 1, PIN 37, PIN 38, PIN 48).
CC
CC
DECOUPLING CAPACITOR CAN BE SHARED BETWEEN AV
PIN 37 AND PIN 38.
CC
2
DECOUPLING SHOWN ON THE REGCAP PIN APPLIES TO EACH REGCAP PIN (PIN 36, PIN 39).
Figure 43. AD7606 Typical Connection Diagram
Rev. 0 | Page 25 of 36
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