adc12l066civyx National Semiconductor Corporation, adc12l066civyx Datasheet - Page 4

• Manufacturer Part Number: adc12l066civyx
• Description: 12-bit, 66 Msps, 450 Mhz Bandwidth A/d Converter With Internal Sample-and-hold
• Manufacturer: National Semiconductor Corporation

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ANALOG POWER
DIGITAL POWER
Pin Descriptions and Equivalent Circuits
Pin No.
5, 6, 29
4, 7, 28
14–19,
22–27
9, 12
13
21
20
DR GND
D0–D11
Symbol
AGND
DGND
V
V
V
DR
A
D
Equivalent Circuit
4
Digital data output pins that make up the 12-bit conversion
results. D0 is the LSB, while D11 is the MSB of the offset
binary output word.
Positive analog supply pins. These pins should be connected
to a quiet +3.3V source and bypassed to AGND with 0.1 µF
monolithic 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 monolithic capacitor in parallel with a 10
µF capacitor, both located within 1 cm of the power pin.
The ground return for the digital supply.
Positive digital supply pin for the ADC12L066’s output drivers.
This pin should be connected to a voltage source of +1.8V to
V
capacitor. If the supply for this pin is different from the supply
used for V
tantalum capacitor. The voltage at this pin should never
exceed the voltage on V
capacitors should be located within 1 cm of the supply pin.
The ground return for the digital supply for the ADC12L066’s
output drivers. This pin should be connected to the system
digital ground, but not be connected in close proximity to the
ADC12L066’s DGND or AGND pins. See Section 5.0 (Layout
and Grounding) for more details.
D
and bypassed to DR GND with a 0.1 µF monolithic
(Continued)
A
and V
D
, it should also be bypassed with a 10 µF
D
Description
by more than 300 mV. All bypass
A
and bypassed to