Cirrus Logic CS5460A - Manual (Page 52)

CS5460A
52 DS487F5
Voltage
Reference Output 11 VREFOUT - The on-chip voltage reference is output from this pin. The voltage reference
has a nominal magnitude of 2.5 V and is reference to the VA- pin on the converter.
Voltage
Reference Input 12 VREFIN - The voltage input to this pin establishes the voltage reference for the on-chip
modulator.
Differential
Current Inputs 15,16 IIN+, IIN- - Differential analog input pins for current channel.
Power Supply Connections
Positive
Digital Supply 3 VD+ - The positive digital supply is nominally +5 V ±10% relative to DGND.
Digital Ground 4 DGND - The common-mode potential of digital ground must be equal to or above the
common-mode potential of VA-.
Negative
Analog Supply 13 VA- - The negative analog supply pin must be at the lowest potential.
Positive
Analog Supply 14 VA+ - The positive analog supply is nominally +5 V ±10% relative to VA-.
Power Fail Monitor 17 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 will not be able to be reset until the PFMON voltage increases ~100 mV (typical) above
the PMLO voltage. Therefore, there is hysteresis in the PFMON function.
RESET 19 Reset - When reset is taken low, all internal registers are set to their default states.
Other
No Connection 18 NC - No connection. Pin should be left floating.