CS5460A datasheet(40/54 Pages) CIRRUS

40 / 54 page

CS5460A

DS487F4

4.1.5 Power-Down

The device has two power-down states to conserve power. If the chip is put in stand-by state, all circuitry except the

analog/digital clock generators is turned off. In the sleep state, all circuitry except the digital clock generator and the

instruction decoder is turned off. Waking up the CS5460A out of sleep state requires more time than waking the

device out of stand-by state, because of the extra time needed to re-start and re-stabilize the analog clock signal.

[S1 S]0

Power-down state

00 = Reserved

01 = Halt and enter stand-by power saving state. This state allows quick power-on time

10 = Halt and enter sleep power saving state. This state requires a slow power-on time

11 = Reserved

4.1.6 Calibration

The device has the capability of performing a system AC offset calibration, DC offset calibration, AC gain calibration,

and DC gain calibration. Calibration can be done on the voltage channel, the current channel, or both channels at

the same time. Offset and gain calibrations should NOT be performed at the same time (must do one after the oth-

er). For a given application, if DC gain calibrations are performed, then AC gain calibration should not be performed

(and vice-versa). The proper input voltages must be supplied to the device before initiating calibration.

[V I]

Designates calibration channel

00 = Not allowed

01 = Calibrate the current channel

10 = Calibrate the voltage channel

11 = Calibrate voltage and current channel simultaneously

Specifies AC calibration (R=1) or DC calibration (R=0)

Designates gain calibration

0 = Normal operation

1 = Perform gain calibration

Designates offset calibration

0 = Normal operation

1 = Perform offset calibration

0S1

S00

CS5460A Datasheet(PDF) 40 Page - Cirrus Logic