CS5101A datasheet(34/40 Pages) CIRRUS

34 / 40 page

Digital Outputs

STBY - Standby (Calibrating), PIN 5.

Indicates calibration status after reset. Remains low throughout the calibration sequence and

returns high upon completion.

SDATA - Serial Output, PIN 15.

Presents each output data bit on a falling edge of SCLK. Data is valid to be latched on the

rising edge of SCLK.

SSH/SDL - Simultaneous Sample/Hold / Serial Data Latch, PIN 11.

Used to control an external sample/hold amplifier to achieve simultaneous sampling between

channels. In FRN and SSC modes (SCLK is an output), this signal provides a convenient latch

signal which forms the 16 data bits. This can be used to control external serial to parallel

latches, or to control the serial port in a DSP.

TRK1, TRK2 - Tracking Channel 1, Tracking Channel 2, PINS 8 and 9.

Falls low at the end of a conversion cycle, indicating the acquisition phase for the

corresponding channel. The TRK1 or TRK2 pin will return high at the beginning of conversion

for that channel.

Analog Outputs

REFBUF - Reference Buffer Output, PIN 21.

Reference buffer output. A 0.1

µF ceramic capacitor must be tied between this pin and VA-.

Miscellaneous

TEST - Test, PIN 26.

Allows access to the CS5101A’s and the CS5102A’s test functions which are reserved for

factory use. Must be tied to VD+.

CS5101A CS5102A

DS45F2

CS5101A Datasheet(PDF) 34 Page - Cirrus Logic