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參數(shù)資料
| 型號(hào)： | OP497FSZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 4/16頁 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP 500KHZ QUAD 16SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 4 |
| 轉(zhuǎn)換速率： | 0.15 V/µs |
| 增益帶寬積： | 500kHz |
| 電流 - 輸入偏壓： | 40pA |
| 電壓 - 輸入偏移： | 40µV |
| 電流 - 電源： | 525µA |
| 電流 - 輸出 / 通道： | 25mA |
| 電壓 - 電源，單路/雙路(±)： | ±2 V ~ 20 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC W |
| 包裝： | 帶卷 (TR) |
OP497
Rev. E | Page 12 of 16
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
TCVOS of the OP497 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 OP497 exceeds
120 dB, yielding an error of less than 2 ppm.
+15V
2
3
4
8
1
6
5
7
0V < VOUT < 10V
D1
1N4148
C1
30pF
D2
1N4148
1/4
OP497
1/4
OP497
–15V
VIN
R2
2k
C3
0.1F
R3
1k
R1
1k
C2
0.1F
00
30
9-
0
37
Figure 36. Precision Absolute Value Amplifier
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.
2
3
1
7
8
5
6
4
–15V
+15V
–
+
VIN
1/4
OP497
1/4
OP497
IOUT ==
=
R5
VIN
100
VIN
10mA/V
R3
10k
R5
10k
R4
10k
R1
10k
R2
10k
IOUT
±10mA
0
03
09
-03
8
Figure 37. Precision Current Pump
PRECISION POSITIVE PEAK DETECTOR
polyethylene to minimize dielectric absorption and leakage.
The droop rate is determined by the size of CH and the bias
current of the OP497.
2
3
1
7
8
5
6
4
+15V
1N4148
2N930
RESET
1/4
OP497
1/4
OP497
+
–15V
VOUT
0.1F
CH
VIN
1k
1k
1k
1k
00
30
9-
0
39
Figure 38. Precision Positive Peak Detector
SIMPLE BRIDGE CONDITIONING AMPLIFIER
Figure 39 shows a simple bridge conditioning amplifier using
the OP497. The transfer function is
R
V
F
REF
OUT
Δ
+
=
Δ
The REF43 provides an accurate and stable reference voltage for
the bridge. To maintain the highest circuit accuracy, RF should
be 0.1% or better with a low temperature coefficient.
2
3
1
7
8
5
6
4
+5V
REF43
6
2
4
+5V
R
2.5V
R +
ΔR
VOUT = VREF
ΔR
R +
ΔRR
1/4
OP497
1/4
OP497
VREF
RF
VOUT
–5V
RF
()
00
30
9-
0
40
Figure 39. Simple Bridge Conditioning Amplifier Using the OP497
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