C8051F352 Datasheet, PDF (41/234 Pages) Silicon Laboratories – 8 k ISP Flash MCU Family

C8051F350/1/2/3
5. 24 or 16-Bit Analog to Digital Converter (ADC0)
The C8051F350/1/2/3 include a fully-differential, 24-bit (C8051F350/1) or 16-bit (C8051F352/3) Sigma-
Delta Analog to Digital Converter (ADC) with on-chip calibration capabiliites. Two separate decimation fil-
ters can be programmed for throughputs of up to 1 kHz. An internal reference is available, or a differential
external reference can be used for ratiometric measurements. A Programmable Gain Amplifier (PGA) is
included, with eight gain settings up to 128x. The on-chip input buffers can be used to provide a high input
impedance for direct connection to sensitive transducers. An 8-bit offset DAC allows for correction of large
input offset voltages.
ADC0CN
ADC0MD
ADC0STA
ADC0BUF
AV+
Voltage
Reference
Control and
Calibration
ADC0COH:M:L
ADC0CGH:M:L
AIN+
AD0BCE
AIN-
AD0BCE
Input
Buffers
Σ
Σ
AGND
8-Bit
Offset
DAC
PGA
ADC0CN
Modulator
SINC³ Filter
Fast Filter
ADC0H:M:L
ADC0FH:M:L
÷ ^SYSCLK
ADC0CLK ADC0DECH:L
Figure 5.1. ADC0 Block Diagram
Rev. 1.1
41