NAD T737 Service Manual page 19

Pin No. Mnemonic
36 R
SET2
45, 35 COMP1,
COMP2
44, 43, 42 DAC 1, DAC 2,
DAC 3
39, 38, 37 DAC 4, DAC 5,
DAC 6
21 SCL/MOSI
20 SDA/SCLK
19 ALSB/SPI_SS
46 V
REF
41 V
AA
10, 56 V
DD
1 V
DD_IO
34 PV
DD
33 EXT_LF1
31 EXT_LF2
32 PGND
40 AGND
11, 57 DGND
64 GND_IO
Input/
Output Description
I This pin is used to control the amplitudes of the DAC 4, DAC 5, and DAC 6 outputs. A 4.12 kΩ
resistor must be connected from R
O Compensation Pins. Connect a 2.2 nF capacitor from both COMP pins to V
O DAC Outputs. Full and low drive capable DACs.
O DAC Outputs. Low drive only capable DACs.
I Multifunctional Pin: I
I/O Multifunctional Pin: I
I Multifunctional Pin: This signal sets up the LSB
Optional External Voltage Reference Input for DACs or Voltage Reference Output.
P Analog Power Supply (3.3 V).
P Digital Power Supply (1.8 V). For dual-supply configurations, V
supplies through a ferrite bead or suitable filtering.
P Input/Output Digital Power Supply (3.3 V).
P PLL Power Supply (1.8 V). For dual-supply configurations, PV
supplies through a ferrite bead or suitable filtering.
I External Loop Filter for On-Chip PLL 1.
I External Loop Filter for On-Chip PLL 2.
G PLL Ground Pin.
G Analog Ground Pin.
G Digital Ground Pin.
G Input/Output Supply Ground Pin.
to AGND.
SET2
2
C Clock Input/SPI Data Input.
2
C Data Input/Output. Also, SPI clock input.
2
of the MPU I
2-6
.
AA
2
C address. Also, SPI slave select.
can be connected to other 1.8 V
DD
can be connected to other 1.8 V
DD