DS1113F1
7
CS4399
1.3 Pin Descriptions
GNDD
35
N/A
I
Digital and I/O Ground.
Ground for the I/O and core logic. GNDA,
GNDCP, GNDD must be connected to a common ground area
under the chip.
—
—
—
GNDA
8
N/A
I
Analog Ground.
Ground reference for the internal analog section.
GNDA, GNDCP, GNDD must be connected to a common ground
area under the chip.
—
—
—
GNDCP
12, 15,
19
N/A
I
Charge Pump Ground.
Ground reference for the charge pump
section. GNDA, GNDCP, GNDD must be connected to a common
ground area under the chip.
—
—
—
V
VCP_FILT–
21
18
VCP/
VP
1
I/O
Inverting Charge Pump Filter Connection.
Power supply from
the inverting charge pump that provides the positive/negative rail
for the analog output. When operating in external VCP_FILT
mode, these pins can directly take in supply voltage.
—
—
—
–VA
9
VA
O
VA Negative Charge Pump Output.
Negative charge pump
output for DAC rail. It is derived from VA.
—
—
—
FLYP_VA
FLYN_VA
10
11
VA
O
–VA Charge Pump Cap Positive/Negative Node.
Positive/
negative nodes for the DAC negative charge pump’s flying
capacitor.
—
—
—
FLYP_VCP
24
VCP/
O
–VCP Charge Pump Cap Positive Node.
Positive node for the
analog output negative charge pump’s flying capacitor.
—
—
—
FLYC_VCP
23
VCP/
O
–VCP Charge Pump Cap Center Node.
Center node for the
analog output negative charge pump’s flying capacitor.
—
—
—
FLYN_VCP
20
VCP_
FILT±
O
–VCP Charge Pump Cap Negative Node.
Negative node for the
analog output negative charge pump’s flying capacitor.
—
—
—
TSO
3
N/A
I/O
Test Output.
—
—
—
TSI
—
Test Input.
—
—
—
1.The power supply is determined by ADPT_PWR setting (see
). VP is used if ADPT_PWR = 001 (VP_LDO Mode) or when necessary for
ADPTPWR = 111 (Adapt-to-Signal Mode).
Table 1-1. Pin Descriptions
(Cont.)
Pin Name
QFN
Pin #
WLCSP
Ball
Power
Supply
I/O
Pin Description
Internal
Connection
Digital I/O
Driver
Digital I/O
Receiver
Ground
Charge Pump
Test