Rainbow Electronics ADC11L066 - Manual (Page 4)

Pin Descriptions and Equivalent Circuits
(Continued)
Pin No. Symbol Equivalent Circuit Description
15–19,
22–27
D0–D10
Digital data output pins that make up the 11-bit conversion
results. D0 is the LSB, while D10 is the MSB of the offset
binary output word.
ANALOG POWER
5, 6, 29 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
monolithic capacitors located within 1 cm of these power pins,
and with a 10 µF capacitor.
4, 7, 28 AGND The ground return for the analog supply.
DIGITAL POWER
13 V
D
Positive digital supply pin. This pin should be connected to
the same quiet +3.3V source as is V
A
and bypassed to
DGND with a 0.1 µF monolithic capacitor in parallel with a 10
µF capacitor, both located within 1 cm of the power pin.
9, 12 DGND The ground return for the digital supply.
21 V
DR
Positive digital supply pin for the ADC11L066’s output drivers.
This pin should be connected to a voltage source of +1.8V to
V
D
and bypassed to DR GND with a 0.1 µF monolithic
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
tantalum capacitor. The voltage at this pin should never
exceed the voltage on V
D
by more than 300 mV. All bypass
capacitors should be located within 1 cm of the supply pin.
20 DR GND
The ground return for the digital supply for the ADC11L066’s
output drivers. This pin should be connected to the system
digital ground, but not be connected in close proximity to the
ADC11L066’s DGND or AGND pins. See Section 5.0 (Layout
and Grounding) for more details.
OTHER
14 TEST
This pin is internally tied to DGND. It may be connected to
DGND, or left floating.
ADC1
1L066
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