Texas Instruments DAC9881EVM - DAC9881 Evaluation Module DAC9881EVM DAC9881EVM 데이터 시트
제품 코드
DAC9881EVM
1
3
1
3
1
3
1
3
1
3
1
3
1
3
2
1
7
8
13
14
2
1
7
8
13
14
4
3
2
1
13
14
6
5
2
1
13
14
8
7
2
1
13
14
10
9
2
1
11
12
8
7
2
1
13
14
8
7
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EVM Operation
Table 7. Jumper Setting Function (continued)
Reference
Jumper Setting
Function
Routes V
OUT
and R
FB
from J4-2 and J4-4 to the noninverting input of U2 operational amplifier.
W9
Routes V
OUT
and R
FB
from J4-6 and J4-8 to the noninverting input of U2 operational amplifier.
LDAC1 signal from J2-15 is routed to drive the LDAC signal of the DAC9881.
The LDAC signal of the DAC9881 is tied to ground for synchronous update of the DAC9881
W10
output.
LDAC2 signal from J2-17 is routed to drive the LDAC signal of the DAC9881.
Routes V
CC
to power the analog supply of the U3 reference device.
W11
Routes +5VA to power the analog supply of the U3 reference device.
Connect the inverting input of U2 to R12 gain resistor for DAC9881’s 2x gain of operation.
W12
Disconnects the inverting input of U2 from R12 gain resistor to allow other output mode of
configuration.
configuration.
If jumper is installed on pins 1 and 2, the LDAC signal of the DAC9881 is tied to ground for
synchronous DAC update operation.
synchronous DAC update operation.
If jumper is installed on pins 3 and 4, the RSTSEL pin of the DAC9881 is tied to ground so that
the DAC output is at 0 V on power up or reset to the device is issued.
the DAC output is at 0 V on power up or reset to the device is issued.
If jumper is installed on pins 5 and 6, the GAIN pin of the DAC9881 is tied to IOV
DD
so that the
DAC output is set with a gain of two output.
If jumper is installed on pins 7 and 8, the USB/BTC pin of the DAC9881 is tied to ground so that
J1
the DAC’s input data format is set for 2s complement format.
If jumper is installed on pins 9 and 10, the RST pin of the DAC9881 is tied to ground so that the
DAC is forced into hardware reset mode.
DAC is forced into hardware reset mode.
If jumper is installed on pins 11 and 12, the PDN pin of the DAC9881 is tied to IOV
DD
so that the
DAC is forced into power-down status.
If jumper is installed on pins 13 and 14, the SDOSEL pin of the DAC9881 is tied to ground so
that the DAC device can be operated in daisy-chain mode.
that the DAC device can be operated in daisy-chain mode.
15
SLAU279A – March 2009 – Revised November 2009
DAC9881 Evaluation Module
Copyright © 2009, Texas Instruments Incorporated