ad73322l Analog Devices, Inc., ad73322l Datasheet - Page 26

• Manufacturer Part Number: ad73322l
• Description: Low Cost, Low Power Cmos General-purpose Dual Analog Front End
• Manufacturer: Analog Devices, Inc.

AD73322L
ANALOG LOOP-BACK MODE
In analog loop-back mode, the differential DAC output is
connected, via a loop-back switch, to the ADC input, as shown
in Figure 22. This mode allows the ADC channel to check
functionality of the DAC channel as the reconstructed output
signal can be monitored using the ADC as a sampler. analog
loop-back is enabled by setting the ALB bit (CRF:7).
Note that analog loop-back can only be enabled if the Analog
Gain Tap is powered down (CRC:1 = 0).
REFOUT
REFCAP
VOUTP1
VOUTN1
VFBN1
VFBP1
VINN1
VINP1
INVERTING
OP AMPS
V
REF
Figure 22. Analog Loop-Back Connectivity
LOOP-BACK
ANALOG
+6/–15dB
SELECT
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PGA
REFERENCE
GAIN
CONTINUOUS
±1
LOW-PASS
FILTER
INVERT
TIME
ANALOG GAIN
TAP POWERED
ENABLE
SINGLE-
AD73322L
ENDED
V
REF
DOWN
0/38dB
PGA