Rainbow Electronics ADC12DL066 - Manual (Page 4)

Pin Descriptions and Equivalent Circuits
(Continued)
Pin No. Symbol Equivalent Circuit Description
24–29
34–39
DA0–DA11
Digital data output pins that make up the 12-bit conversion
results of their respective converters. DA0 and DB0 are the
LSBs, while DA11 and DB11 are the MSBs of the output
word. Output levels are TTL/CMOS compatible.
42–47
52–57
DB0–DB11
ANALOG POWER
9, 18, 19,
62, 63
V
A
Positive analog supply pins. These pins should be connected
to a quiet +3.3V source and bypassed to AGND with 0.1 µF
capacitors located within 1 cm of these power pins, and with
a 10 µF capacitor.
3, 8, 10, 17,
20, 61, 64
AGND The ground return for the analog supply.
DIGITAL POWER
33, 48 V
D
Positive digital supply pin. This pin should be connected to
the same quiet +3.3V source as is V
A
and be bypassed to
DGND with a 0.1 µF capacitor located within 1 cm of the
power pin and with a 10 µF capacitor.
32, 49 DGND The ground return for the digital supply.
30, 51 V
DR
Positive digital supply pin for the ADC12DL066’s output
drivers. This pin should be connected to a voltage source of
+2.4V to V
D
and be bypassed to DR GND with a 0.1 µF
capacitor. If the supply for this pin is different from the
supply used for V
A
and V
D
, it should also be bypassed with
a 10 µF capacitor. V
DR
should never exceed the voltage on
V
D
. All bypass capacitors should be located within 1 cm of
the supply pin.
23, 31, 40,
50, 58
DR GND
The ground return for the digital supply for the
ADC12DL066’s output drivers. These pins should be
connected to the system digital ground, but not be
connected in close proximity to the ADC12DL066’s DGND or
AGND pins. See Section 5 (Layout and Grounding) for more
details.
ADC12DL066
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