PAC25140 Users Guide Preview
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Rev. 1.0.0 28 February 2023 © 2023 Qorvo US, Inc.
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7
CONFIGURABLE ANALOG FRONT-END
7.1
Overview
The device includes a Configurable Analog Front End (CAFE, Figure 7-1). The CAFE can be
used to sense battery pack current using an integrated Differential Amplifier and 16-bit Sigma-
Delta ADC. The CAFE can configure three independent DACs to set three comparator
thresholds for over-current detection for the battery pack.
The CAFE can also sense cell voltages via a 16-bit Sigma Delta ADC and MUX which contains
inputs for each of the cell balance channels. Internal power supply rails, temperature, and
other signals can be selected using the AFE Mux and sampled using the MCU 10-bit SAR ADC.
7.2
Features
▪
16-bit Sigma-Delta ADC for current sense
▪
Current Sense Differential Programmable-Gain Amplifier
▪
Three comparators with DACs for programmable references for configurable OC warning or
fault handling
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16-bit Sigma-Delta ADC for Voltage and Temperature sense
▪
Sampling of up to 20 cell voltages and internal power supplies
▪
Push-Button (PB) input for exiting hibernate mode
▪
Charge detection and Load detection
▪
Analog input/output gain amplifier with ADC Input or signal output selection
▪
2kHz independent clock source
