OP497GPZ Analog Devices Inc, OP497GPZ Datasheet - Page 12

• Manufacturer Part Number: OP497GPZ
• Description: IC OPAMP GP 500KHZ QUAD 14DIP
• Manufacturer: Analog Devices Inc

Specifications of OP497GPZ

• Slew Rate: 0.15 V/µs
• Amplifier Type: General Purpose
• Number Of Circuits: 4
• Gain Bandwidth Product: 500kHz
• Current - Input Bias: 60pA
• Voltage - Input Offset: 80µV
• Current - Supply: 525µA
• Current - Output / Channel: 25mA
• Voltage - Supply, Single/dual (±): ±2 V ~ 20 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 14-DIP (0.300", 7.62mm)
• Op Amp Type: Precision
• No. Of Amplifiers: 4
• Bandwidth: 500kHz
• Supply Voltage Range: ± 2V To ± 20V
• Amplifier Case Style: DIP
• No. Of Pins: 14
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• -3db Bandwidth: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

OP497
APPLICATIONS CIRCUIT
PRECISION ABSOLUTE VALUE AMPLIFIER
The circuit in Figure 36 is a precision absolute value amplifier
with an input impedance of 30 MΩ. The high gain and low
TCV
input signals. In this circuit, the input always appears as a common-
mode signal to the op amps. The CMR of the OP497 exceeds
120 dB, yielding an error of less than 2 ppm.
PRECISION CURRENT PUMP
Maximum output current of the precision current pump shown
in Figure 37 is ±10 mA. Voltage compliance is ±10 V with ±15 V
supplies. Output impedance of the current transmitter exceeds
3 MΩ with linearity better than 16 bits.
V
IN
OS
2
3
I
of the OP497 ensure accurate operation with microvolt
OUT
OP497
V
+15V
–15V
1/4
IN
=
–
+
V
8
4
R5
0.1µF
IN
Figure 36. Precision Absolute Value Amplifier
C2
0.1µF
=
10kΩ
10kΩ
C3
100Ω
R1
R2
1
V
Figure 37. Precision Current Pump
IN
C1
30pF
=
10mA/V
2
3
10kΩ
R4
OP497
1N4148
D1
1N4148
10kΩ
1/4
R3
D2
1kΩ
R1
7
1
OP497
+15V
–15V
R2
2kΩ
1/4
8
4
6
5
10kΩ
OP497
R5
1kΩ
5
6
1/4
R3
0V < V
7
±10mA
I
OUT
OUT
< 10V
Rev. E | Page 12 of 16
PRECISION POSITIVE PEAK DETECTOR
In Figure 38, the C
polyethylene to minimize dielectric absorption and leakage.
The droop rate is determined by the size of C
current of the OP497.
SIMPLE BRIDGE CONDITIONING AMPLIFIER
Figure 39 shows a simple bridge conditioning amplifier using
the OP497. The transfer function is
The REF43 provides an accurate and stable reference voltage for
the bridge. To maintain the highest circuit accuracy, R
be 0.1% or better with a low temperature coefficient.
V
IN
V
Figure 39. Simple Bridge Conditioning Amplifier Using the OP497
OUT
1kΩ
REF43
+5V
=
2
4
2
3
V
OP497
REF
6
Figure 38. Precision Positive Peak Detector
1/4
2.5V
⎛
⎜
⎜
⎝
R
R
6
5
H
R
OP497
must be of polystyrene, Teflon®, or
RESET
Δ
V
+
1
REF
1/4
R
Δ
+5V
–5V
R
8
4
1N4148
R + ΔR
1kΩ
R
⎞
⎟
⎟
⎠
C
H
R
R
7
2N930
F
1kΩ
+
V
2
3
OUT
1kΩ
OP497
= V
1/4
6
5
R
REF
OP497
F
1/4
+15V
–15V
(
4
H
R + ΔR
1
8
0.1µF
0.1µF
ΔR
and the bias
7
)
V
OUT
R
R
F
F
should
V
OUT