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AS89020 Datasheet(PDF) 12 Page - ams-OSRAM AG

Part # AS89020
Description  4-channel, current input 12 bit analog-to-digital converter (ADC)
PDF  32 Pages
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Manufacturer  AMSOSRAM [ams-OSRAM AG]
Direct Link  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS89020 Datasheet(HTML) 12 Page - ams-OSRAM AG

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db09284e_V3.01_preliminary_2017-07-06
Page 10 of 30
AS89020
V3.01
4 PIN ASSIGNMENT
The pin assignment is shown in the following table.
Table 4: Pin assignment (Analog/Digital)
PIN
TYPE
A/D
DESCRIPTION
VDDA
power
A
analog power supply voltage
VSSA
power
A
analog ground voltage
VDD
power
D
digital power supply voltage (VDDA = VDD)
VSS
power
D
digital ground voltage (VSSA = VSS)
IN0, IN1, IN2, IN3
input
A
current inputs
REXT
input
A
constant reference current (6 µA) for setting the
full-scale ratio (FSR) of AD conversion
(200 kΩ resistor REXT to VSSA has to be connected)
VRT
output
A
TIA reference voltage – recommended as external
photodiodes bias voltage (cathodes or anodes)
VRH
output
A
ADC high reference voltage
VRL
output
A
ADC low reference voltage
VBH
output
A
internal reference voltage
SCLK
input
D
SPI and ADC clock input (pull-up)
SDI
input
D
SPI data input (pull-up)
SDO
output
D
SPI data output
CSN
input
D
SPI chip select (pull-up and low-active)
CONVN
input
D
start AD conversion (pull-up and low-active)
PDN
input
D
Power Down mode (pull-up and low-active)



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