ADC128D818_14 Datasheet, PDF (2/41 Pages) Texas Instruments – ADC128D818 12-Bit, 8-Channel, ADC System Monitor with Temperature Sensor Internal/External Reference, and I2C Interface

ADC128D818
SNAS483E – FEBRUARY 2010 – REVISED MARCH 2013
Typical Application
LM94022
Single-Ended
Positive Voltage
10VIN
Shutdown
Margining
Voltage
Pseudo-Differential
Positive Voltage
DC-DC
V_OUT
R_TRACE
V+ VREF
ADC128D818
IN0
IN1
IN2
IN3
IN4 (+)
IN5 (-)
IN7 (+)
IN6 (-)
Internal
VREF = +2.56V
12-bit
Delta-Sigma
ADC
Interrupt
Status
Registers
Interrupt
Masking
and
Interrupt
Control
Temperature
Sensor
I²C Interface and Control
GND
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INT
SDA
SCL
A0
A1
Connection Diagram
VREF 1
SDA 2
SCL 3
GND 4
V+ 5
INT 6
A0 7
A1 8
ADC128D818
16-pin TSSOP
16 IN0
15 IN1
14 IN2
13 IN3
12 IN4
11 IN5
10 IN6
9 IN7
Pin
Number
Pin
Name(s)
1
VREF
2
SDA
ESD
Structure
PIN DESCRIPTIONS
Type
Description
Analog Input
ADC external reference.
ADC128D818 allows two choices for sourcing VREF:
internal or external. If the +2.56V internal VREF is used,
leave this pin unconnected. If the external VREF is used,
source this pin with a voltage between +1.25V and V+. At
Power-On-Reset (POR), the default setting is the internal
VREF.
Bypass with the parallel combination of 1 μF (electrolytic or
tantalum) and 0.1 μF (ceramic) capacitors.
Digital I/O
Serial Bus Bidirectional Data. NMOS open-drain output.
Requires external pull-up resistor to function properly.
3
SCL
Digital Input
Serial Bus Clock. Requires external pull-up resistor to
function properly.
4
GND
5
V⁺
ESD
Clamp
GROUND
POWER
Internally connected to all of the circuitry.
+3.0V to +5.5V power. Bypass with the parallel combination
of 1 μF (electrolytic or tantalum) and 0.1 μF (ceramic)
bypass capacitors.
2
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