XTR111 Datasheet, PDF (17/22 Pages) Burr-Brown (TI) – Precision Voltage-to-Current Converter/Transmitter

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XTR111
SBOS375 − NOVEMBER 2006
5V
C₂
470nF
REF3040
4096mV
Voltage Reference
16−Bit Digital−to−Analog
Digital I/O
Converter
DAC8551
5 REGF
R₁
2kΩ
4 REGS
R₂
3kΩ
3V
R₃
2kΩ _{6 VIN}
1
VSP
Current
Mirror
OD 9
EF 8
IS 2
VG 3
G
S
Q₁
D
R₄
817.2kΩ
NOTE: Calculate R_SET for R₄ Parallel to R_SET.
SET
7
GND
10
R_SET
2kΩ
(1.995kΩ)
Load
C_{LO AD}
0mA to 20mA output
for 10mV to 4096mV input
or a code of 160b to 65536b
R_{LOA D}
Figure 11. Precision Current Output with Signal from 16-Bit DAC. Input Offset Shifted (R4) by 10mV for
Zero Adjustment Range
5V
C₂
470nF
REF3040
4096mV
Voltage Reference
16−Bit Digital−to−Analog
Digital I/O
Converter
DAC8551
5 REGF
R₁
2kΩ
4 REGS
R₂
3kΩ
3V
R₃
2kΩ _{6 VIN}
1
VSP
Current
Mirror
OD 9
EF 8
IS 2
VG 3
G
S
Q₁
D
R₄
817.2kΩ
NOTE: Calculate R_SET for R₄ Parallel to R_SET.
SET
7
GND
10
R_SET
2kΩ
(1.995kΩ)
Load
C_{LO AD}
0mA to 20mA output
for 10mV to 4096mV input
or a code of 160b to 65536b
R_{LOA D}
Figure 12. 0V to 10V or 0mA to 20mA Output Selected by Jumper (SW1)
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