OP200FZ View Datasheet(PDF) - Analog Devices
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OP200FZ Datasheet PDF : 12 Pages
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PRECISION ABSOLUTE VALUE AMPLIFIER
The circuit of Figure 5 is a precision absolute value amplifier
with an input impedance of 10 MW. The high gain and low
TCVOS of the OP200 ensure accurate operation with microvolt
input signals. In this circuit, the input always appears as a
common-mode signal to the op amps. The CMR of the OP200
exceeds 120 dB, yielding an error of less than 2 ppm.
+15 C2
0.1pF
R1
1k⍀
R3
1k⍀
C1
3
30pF
8
6
D1
1N4148
1/2
7
OP200AZ
VOUT
1/2
1
OP200AZ
5
0V < VOUT < 10V
VIN
2
4 C2
D1
1N4148 R2
0.1pF
2k⍀
–15
Figure 5. Precision Absolute Value Amplifier
OP200
PRECISION CURRENT PUMP
Maximum output current of the precision current pump shown
in Figure 6 is ± 10 mA. Voltage compliance is ± 10 V with ± 15 V
supplies. Output impedance of the current transmitter exceeds
3 MW with linearity better than 16 bits.
R1
10k⍀
VIN R2
10k⍀
R3
2 10k⍀
1/2 1
OP200EZ
3
R5
100⍀
+15
IOUT
R4
1k⍀
8
5
7 1/2
OP200EZ
6
4
IOUT
=
VIN
RS
=
VIN
100⍀
=
10mA/V
–15
Figure 6. Precision Current Pump
DUAL 12-BIT VOLTAGE OUTPUT DAC
The dual output DAC shown in Figure 7 is capable of providing
untrimmed 12-bit accurate operation over the entire military
temperature range. Offset voltage, bias current and gain errors
of the OP-200 contribute less than 1/lO of an LSB error at 12
bits over the military temperature range.
5V
10V
REFERENCE
VOLTAGE
21
VDD
DAC-8222EW
4 VREFA
DAC A
1/2
DAC8212AV
RFBA 3
IOUTA 2
DAC DATA BUS
PINS 6(MSB) – 17(LSB)
DAC
CONTROL
22 VREFB
DAC B
1/2
DAC8212AV
18 DAC A/DAC B
19 CS
20 WR
DGND
5
23
RFBB
IOUTB 24
AGND 1
8
2–
1/2
1
OP200AZ
3+
4
6–
1/2
7
OP200AZ
5+
Figure 7. Dual 12-Bit Voltage Output DAC
OUTA
–15V
OUTB
REV. A
–9–
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