ADC081000LEVAL datasheet(3/29 Pages) NSC

3 / 29 page

Pin Descriptions and Equivalent Circuits

Pin Functions

Pin No.

Symbol

Equivalent Circuit

Description

OutV

Output Voltage Amplitude set. Tie this pin high for

normal differential output amplitude. Ground this pin for

a reduced differential output amplitude and reduced

power consumption. See Section 1.5.

OutEdge

Output Edge Select. Sets the edge of the DCLK+ (pin

82) at which the output data transitions. The output

transitions with the DCLK+ rising edge when this pin is

high or on the falling edge when this pin is low. See

Section 5.3.

DC_Coup

DC Coupling select. When this pin is high, the V

IN+ and

IN- analog inputs are d.c. coupled and the input

common mode voltage should equal the V

CMO (pin 7)

output voltage. When this pin is low, the analog input

pins are internally biased and the input signal should be

a.c. coupled to the analog input pins. See Section 3.0.

Power Down Pin. A logic high on this pin puts the ADC

into the Power Down mode. A logic low on this pin

allows normal operation.

CAL

Calibration. A minimum 10 clock cycles low followed by

a minimum of 10 clock cycles high on this pin will

initiate the self calibration sequence. See Section 1.1.

FSR

Full scale Range Select. With a logic low on this pin,

the full-scale differential input is 600 mV

P-P. With a logic

high on this pin, the full-scale differential input is 800

P-P. See Section 1.3.

127

CalDly

Calibration Delay. This sets the number of clock cycles

after power up before calibration begins. See Section

1.1.

CLK+

CLK-

Clock input pins for the ADC. The differential clock

signal must be a.c. coupled to these pins. The input

signal is sampled on the falling edge of CLK+.

IN+

IN-

Analog Signal Differential Inputs to the ADC.

ADC081000LEVAL Datasheet(PDF) 3 Page - National Semiconductor (TI)

ADC081000LEVAL Datasheet(HTML) 3 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

Datasheet Download

Link URL