C8051F020DK Silicon Laboratories Inc, C8051F020DK Datasheet - Page 29
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C8051F020DK
Manufacturer Part Number
C8051F020DK
Description
DEV KIT FOR F020/F021/F022/F023
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheet
1.C8051F020DK.pdf
(272 pages)
Specifications of C8051F020DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F02x
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F020
Silicon Family Name
C8051F02x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Silicon Laboratories C8051 F020/021/022/023
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1200
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F020DK
Manufacturer:
SiliconL
Quantity:
10
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1.8.
The C8051F020/1/2/3 has an on-board 8-bit SAR ADC (ADC1) with an 8-channel input multiplexer and programma-
ble gain amplifier. This ADC features a 500 ksps maximum throughput and true 8-bit accuracy with an INL of
±1LSB. Eight input pins are available for measurement. The ADC is under full control of the CIP-51 microcontroller
via the Special Function Registers. The ADC1 voltage reference is selected between the analog power supply (AV+)
and an external VREF pin. On C8051F020/2 devices, ADC1 has its own dedicated VREF1 input pin; on
C8051F021/3 devices, ADC1 shares the VREFA input pin with the 12/10-bit ADC0. User software may put ADC1
into shutdown mode to save power.
A programmable gain amplifier follows the analog multiplexer. The gain stage can be especially useful when differ-
ent ADC input channels have widely varied input voltage signals, or when it is necessary to "zoom in" on a signal
with a large DC offset (in differential mode, a DAC could be used to provide the DC offset). The PGA gain can be set
in software to 0.5, 1, 2, or 4.
A flexible conversion scheduling system allows ADC1 conversions to be initiated by software commands, timer
overflows, or an external input signal. ADC1 conversions may also be synchronized with ADC0 software-com-
manded conversions. Conversion completions are indicated by a status bit and an interrupt (if enabled), and the
resulting 8-bit data word is latched into an SFR upon completion.
8-Bit Analog to Digital Converter
AIN1.0
AIN1.1
AIN1.2
AIN1.3
AIN1.4
AIN1.5
AIN1.6
AIN1.7
Analog Multiplexer
AMUX
8-to-1
Figure 1.12. 8-Bit ADC Diagram
Programmable Gain
X
Amplifier
External VREF
Configuration, Control, and Data Registers
+
-
AV+
AV+
Pin
Rev. 1.4
ADC
VREF
8-Bit
SAR
Start Conversion
8
C8051F020/1/2/3
ADC Data
Register
Write to AD1BUSY
Timer 3 Overflow
CNVSTR Input
Timer 2 Overflow
Write to AD0BUSY
(synchronized with
ADC0)
Conversion
Complete
Interrupt
29
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