Datasheet

ESD
Clamp
1
2
SDA
3
SCL
4
GND
5
6
7
A1
8
V+
16
15
14
13
12
11
10
9
ADC128D818
16-pin TSSOP
IN7
VREF
IN6
IN5
IN4
IN3
IN2
IN1
IN0
A0
INT
SDA
SCL
A0
A1
INT
IN7 (+)
I
2
C Interface and Control
Interrupt
Masking
and
Interrupt
Control
ADC128D818
12-bit
Delta-Sigma
ADC
Internal
VREF = +2.56V
Temperature
Sensor
Interrupt
Status
Registers
GND
VREF
V+
Single-Ended
Positive Voltage
LM94022
Shutdown
DC-DC
10VIN
V
OUT
Margining
Voltage
IN0
IN1
IN2
IN3
Pseudo-Differential
Positive Voltage
IN4 (+)
IN5 (-)
IN6 (-)
R
TRACE
ADC128D818
SNAS483E –FEBRUARY 2010–REVISED MARCH 2013 www.ti.com
Typical Application
Connection Diagram
PIN DESCRIPTIONS
Pin Pin ESD
Type Description
Number Name(s) Structure
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,
1 VREF Analog Input 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.
Serial Bus Bidirectional Data. NMOS open-drain output.
2 SDA Digital I/O
Requires external pull-up resistor to function properly.
Serial Bus Clock. Requires external pull-up resistor to
3 SCL Digital Input
function properly.
4 GND GROUND Internally connected to all of the circuitry.
+3.0V to +5.5V power. Bypass with the parallel combination
5 V
+
POWER of 1 μF (electrolytic or tantalum) and 0.1 μF (ceramic)
bypass capacitors.
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