adc12dl066civs National Semiconductor Corporation, adc12dl066civs Datasheet - Page 4

• Manufacturer Part Number: adc12dl066civs
• Description: Dual 12-bit, 66 Msps, 450 Mhz Input Bandwidth A/d Converter W/internal Reference
• Manufacturer: National Semiconductor Corporation

www.national.com
ANALOG POWER
DIGITAL POWER
3, 8, 10, 17,
23, 31, 40,
Pin Descriptions and Equivalent Circuits
20, 61, 64
9, 18, 19,
Pin No.
24–29
34–39
42–47
52–57
62, 63
33, 48
32, 49
30, 51
50, 58
DA0–DA11
DB0–DB11
DR GND
Symbol
DGND
AGND
V
V
V
DR
A
D
Equivalent Circuit
4
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.
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.
The ground return for the analog supply.
Positive digital supply pin. This pin should be connected to
the same quiet +3.3V source as is V
DGND with a 0.1 µF capacitor located within 1 cm of the
power pin and with a 10 µF capacitor.
The ground return for the digital supply.
Positive digital supply pin for the ADC12DL066’s output
drivers. This pin should be connected to a voltage source of
+2.4V to V
capacitor. If the supply for this pin is different from the
supply used for V
a 10 µF capacitor. V
V
the supply pin.
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.
D
. All bypass capacitors should be located within 1 cm of
(Continued)
D
and be bypassed to DR GND with a 0.1 µF
A
and V
DR
should never exceed the voltage on
Description
D
, it should also be bypassed with
A
and be bypassed to