ADC16061CCVT datasheet(4/21 Pages) NSC

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Pin Descriptions and Equivalent Circuits (Continued)

No.

Symbol

Equivalent Circuit

Description

Digital I/O

CLOCK

Digital clock input. The input voltage is captured t

AD after the fall of

the clock signal. The clock frequency should not be changed or

interrupted during conversion or while reading data output.

CAL

CAL is a level-sensitive digital input that, when pulsed high for at

least two clock cycles, puts the ADC into the CALIBRATE mode.

See Section 2.3 .

RESET

RESET is a level-sensitive digital input that, when pulsed high for

at least 2 CLOCK cycles, results in the resetting of the ADC. This

reset pulse must be applied after ADC power-up, before calibration.

RD is the (READ) digital input that, when low, enables the output

data buffers. When this input pin is high, the output data bus is in a

high impedance state.

PD is the Power Down input that, when low, puts the converter into

the power down mode. When this pin is high, the converter is in

the active mode.

EOC

EOC is a digital output that, when low, indicates the availability of

new conversion results at the data output pins.

21-32

35-38

D00-15

Digital data outputs that make up the 16-bit TRI-STATE conversion

results. D00 is the LSB, while D15 is the MSB (SIGN bit) of the

two’s complement output word.

Analog Power

6, 7, 45

Positive analog supply pins. These pins should be connected to a

clean, quiet +5V source and bypassed to AGND with 0.1 µF

monolithic capacitors in parallel with 10 µF capacitors, both located

within 1 cm of these power pins.

5, 8, 46

AGND

The ground return for the analog supply. AGND and DGND should

be connected together directly beneath the ADC16061 package.

See Section 5 (Layout and grounding) for more details).

Digital Power

Positive digital supply pin. This pin should be connected to the

same clean, quiet +5V source as is V

A and bypassed to DGND

with a 0.1 µF monolithic capacitor in parallel with a 10µF capacitor,

both located within 1 cm of the power pin.

12, 13,

14, 19,

41, 42,

DGND

The ground return for the digital supply. AGND and DGND should

be connected together directly beneath the ADC16061 package.

See Section 5 (Layout and Grounding) for more details.

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