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ADC121C021Q Datasheet(PDF) 3 Page - Texas Instruments

Part # ADC121C021Q
Description  12-Bit Analog-to-Digital Converter with Alert Function
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADC121C021Q Datasheet(HTML) 3 Page - Texas Instruments

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Snap
Back
GND
D1
PIN
V+
2.1k
41.5k
41.5k
Snap
Back
GND
D1
PIN
ADC121C021, ADC121C021Q, ADC121C027
www.ti.com
SNAS415F – JANUARY 2008 – REVISED MARCH 2013
PIN DESCRIPTIONS
Symbol
Type
Equivalent Circuit
Description
Power and unbuffered reference voltage. VA must be free of
VA
Supply
noise and decoupled to GND.
GND
Ground
Ground for all on-chip circuitry.
VIN
Analog Input
See Figure 22
Analog input. This signal can range from GND to VA.
Alert output. Can be configured as active high or active low.
ALERT
Digital Output
This is an open drain data line that must be pulled to the
supply (VA) with an external pull-up resistor.
Serial Clock Input. SCL is used together with SDA to control
the transfer of data in and out of the device. This is an open
SCL
Digital Input
drain data line that must be pulled to the supply (VA) with an
external pull-up resistor.
Serial Data bi-directional connection. Data is clocked into or
Digital
out of the internal 16-bit register with SCL. This is an open
SDA
Input/Output
drain data line that must be pulled to the supply (VA) with an
external pull-up resistor.
Tri-level Address Selection Input. Sets Bits A0 & A1 of the
ADR0
7-bit slave address. (see Table 1)
Digital Input,
three levels
Tri-level Address Selection Input. Sets Bits A2 & A3 of the
ADR1
7-bit slave address. (see Table 1)
Package Pinouts
VA
GND
VIN
ALERT
SCL
SDA
ADR0
ADR1
ADC121C021, SOT
1
2
3
4
5
6
N/A
N/A
ADC121C027, SOT
1
2
3
N/A
5
6
4
N/A
ADC121C021, VSSOP
5
7
4
2
1
8
3
6
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Copyright © 2008–2013, Texas Instruments Incorporated
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Product Folder Links: ADC121C021 ADC121C021Q ADC121C027


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