adc121c021eb National Semiconductor Corporation, adc121c021eb Datasheet - Page 3

• Manufacturer Part Number: adc121c021eb
• Description: Adc121c021/adc121c027 I2c-compatible, 12-bit Analog-to-digital Converter With Alert
• Manufacturer: National Semiconductor Corporation

Pin Descriptions
Package Pinouts
Symbol
ALERT
ADR0
ADR1
GND
SDA
SCL
V
V
IN
A
ADC121C021
ADC121C027
ADC121C021
MSOP-8
TSOT-6
TSOT-6
Digital Output
Analog Input
Input/Output
Digital Input,
Digital Input
three levels
Ground
Supply
Digital
Type
V
1
1
5
A
Equivalent Circuit
GND
2
2
7
See
Figure 4
V
3
3
4
IN
3
ALERT
N/A
4
2
Power and unbuffered reference voltage. V
of noise and decoupled to GND.
Ground for all on-chip circuitry.
Analog input. This signal can range from GND to V
Alert output. Can be configured as active high or active
low. This is an open drain data line that must be pulled to
the supply (V
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 drain data line that must be pulled to the supply
(V
ESD tolerance( 8kV HBM) allows extension of the I
across multiple boards without extra ESD protection.
Serial Data bi-directional connection. Data is clocked into
or out of the internal 16-bit register with SCL. This is an
open drain data line that must be pulled to the supply
(V
ESD tolerance( 8kV HBM) allows extension of the I
across multiple boards without extra ESD protection.
Tri-level Address Selection Input. Sets Bits A0 & A1 of the
7-bit slave address. (see
Tri-level Address Selection Input. Sets Bits A2 & A3 of the
7-bit slave address. (see
A
A
) with an external pull-up resistor. This pin's extended
) with an external pull-up resistor. This pin's extended
SCL
5
5
1
A
) with an external pull-up resistor.
Description
SDA
6
6
8
Table
Table
1)
1)
ADR0
N/A
4
3
A
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must be free
ADR1
N/A
N/A
2
2
6
A
C bus
C bus
.