Functional Description
(Continued)
Optional — The UP die pad is bounded on each side by a
logic High and a logic Low pad. This allows the state of UP
to be chosen on the TCP to eliminate an input pin.
V
CS
—
C
HARGE
S
HARE
V
OLTAGE REFERENCE
This input provides the reference for the common node
voltage during charge share time.
V
DD1
—DIGITAL
V
OLTAGE SUPPLY
Positive supply voltage for the digital logic functions of the
driver.
V
DD2
—ANALOG
V
OLTAGE SUPPLY
Positive supply voltage for the analog functions of the driver.
V
GMA1
–V
GMA12
—RDAC REFERENCES (INPUTS)
The reference voltages to the upper and lower RDACs used
to control the inverse gamma transfer function of the driver.
Option – Any or all of the inputs V
through V
and
V
GMA8
through V
GMA11
can be left undriven (floating) at the
designer’s option to eliminate input pins and/or external
reference circuitry.
V
HBIAS
—
H
IGH
BIAS
CURRENT
V
OLTAGE SUPPLY
Optional positive supply voltage that provides a constant
bias current to the output amplifiers to extend dynamic
range. When separately provided, V
must be 1.5V
greater than V
(see Table iii for limits). When not sepa-
rately provided, V
HBIAS
must be supplied by V
DD2
. In this
configuration, V
DD2
1.5V
(see table iii for limits).
V
SS1
—
DIGITAL G
ROU
ND
Digital ground reference voltage.
V
SS2
—ANALOG GROU
ND
Analog ground reference voltage.
DS200152-8
FIGURE 1. External Components and Connections for the I
REF
, I
SIN
and I
SOUT
Pins
F
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