adc14161 National Semiconductor Corporation, adc14161 Datasheet - Page 5

• Manufacturer Part Number: adc14161
• Description: Low-distortion, Self-calibrating 14-bit, 2.5 Msps, 390 Mw A/d Converter
• Manufacturer: National Semiconductor Corporation

Digital Power
NC
12,13
14,19
41,42
16,21
22,39
9,15,
Pin Descriptions and Equivalent Circuits
2, 3,
20
43
34
33
DGND I/O
DGND
V
D
NC
V
D
I/O
Positive digital supply pin. This pin should be connected to the same clean,
quiet +5V source of as is V
monolithic capacitor in parallel with a 10µF capacitor, both located within 1
cm of the power pin.
The ground return for the digital supply. AGND and DGND should be
connected together directly beneath the ADC14161 package. See Section
5 (Layout and Grounding) for more details.
Positive digital supply pin for the ADC14161’s output drivers. This pin
should be connected to a +3V to +5V source and bypassed to DGND I/O
with a 0.1 µF monolithic capacitor. If the supply for this pin is different from
the supply used for V
capacitor. All bypass capacitors should be located within 1 cm of the
supply pin.
The ground return for the digital supply for the ADC14161’s output drivers.
This pin should be connected to the system digital ground, but not be
connected in close proximity to the ADC14161’s DGND or AGND pins. See
Section 5.0 (Layout and Grounding) for more details.
All pins marked NC (no connect) should be left floating. Do not connect the
NC pins to ground, power supplies, or any other potential or signal. These
pins are used for test in the manufacturing process.
5
(Continued)
A
and V
A
and bypassed to DGND with a 0.1 µF
D
, it should also be bypassed with a 10 µF
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