Datasheet

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SBAS279D − AUGUST 2003 − REVISED JULY 2005
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9
Terminal Functions (continued)
TERMINAL
NAME DESCRIPTIONI/ONO.
REF
IN
25 I External reference voltage input; internal reference voltage output; bypass with 0.1μF to AGND for internal
reference operation.
I
OUT1
26 O Complementary current ouput of I-DAC1
I
OUT1
27 O Current output of I-DAC1
AGND 28 Analog ground of I-DAC
+V
A
29 Analog supply of I-DAC; 2.7V to 3.3V
+V
A
30 Analog supply of I-DAC; 2.7V to 3.3V
AGND 31 Analog ground of I-DAC
AGND 32 Analog ground of I-DAC
I
OUT2
33 O Current output of I-DAC2
I
OUT2
34 O Complementary current ouput of I-DAC2
+V
AV
35 Analog supply of V-DAC; 2.7V to 3.3V
NC 36 No internal connection
V
OUT1
37 O Voltage output of V-DAC1
V
OUT2
38 O Voltage output of V-DAC2
V
OUT3
39 O Voltage output of V-DAC3
V
OUT4
40 O Voltage output of V-DAC4
AGNDV 41 Analog ground of V-DAC
REFV 42 I Reference voltage input for V-DACs; typically connected to supply (+V
AV
)
+V
DV
43 Digital supply of V-DAC; 2.7V to 3.3V
PDV 44 I Power-down of V-DACs; active high; a logic high initiates the power-down mode
DIN 45 I Serial digital input for V−DAC; see timing and application sections for details
SCLK 46 I Clock input of V-DAC
SYNC 47 I Frame synchronization signal for the serial data at DIN. Refer to timing section for details.
DGNDV 48 Digital ground of V-DAC.