CS5461 datasheet(7/46 Pages) CIRRUS

7 / 46 page

CS5461

DS546PP2

Measurement and Reference Input

Differential

Voltage Inputs

9,10

VIN+, VIN- - Differential analog input pins for the voltage channel.

Differential

Current Inputs

15,16

IIN+, IIN- - Differential analog input pins for the current channel.

Voltage

Reference Output

VREFOUT - The on-chip voltage reference output. The voltage reference has a nominal

magnitude of 2.5 V and is referenced to the VA- pin on the converter.

Voltage

Reference Input

VREFIN - The input to this pin establishes the voltage reference for the on-chip modula-

tor.

Power Supply Connections

Positive

Digital Supply

VD+ - The positive digital supply relative to DGND.

Digital Ground

DGND - The common-mode potential of digital ground must be equal to or above the

common-mode potential of VA-.

Positive

Analog Supply

VA+ - The positive analog supply relative to VA-.

Analog Ground

VA- - The analog ground pin must be at the lowest potential.

Power Fail Monitor

PFMON - The power fail Monitor pin monitors the analog supply. Typical threshold level

(PMLO) is 2.45 V with respect to the VA- pin. If PFMON voltage threshold is tripped, the

LSD (low-supply detect) bit is set in the Status Register. Once the LSD bit has been set, it

cannot be reset until the PFMON voltage increases ~100 mV (typical) above the PMLO

voltage.

CS5461 Datasheet(PDF) 7 Page - Cirrus Logic