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参数资料
| 型号： | AD648K |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Dual Precision, Low Power BiFET Op Amp |
| 中文描述： | 双路精密低功耗运算放大器BiFET |
| 文件页数： | 9/12页 |
| 文件大小： | 335K |
| 代理商： | AD648K |
AD648
REV. C
–9–
INST RUME NT AT ION AMPLIFIE R
T he AD648J’s maximum input current of 20 pA per amplifier
makes it an excellent building block for the high input imped-
ance instrumentation amplifier shown in Figure 29. T otal cur-
rent drain for this circuit is under 600
μ
A. T his configuration is
optimal for conditioning differential voltages from high imped-
ance sources.
T he overall gain of the circuit is controlled by R
G
, resulting in
the following transfer function:
V
OUT
V
IN
=
1
+
(
R
3
+
R
4)
R
G
Gains of 1 to 100 can be accommodated with gain nonlinearities
of less than 0.01%. T he maximum input current is 30 pA over
the common-mode range, with a common-mode impedance of
over 1
×
10
12
. T he capacitors C1, C2, C3 and C4 compensate
for peaking in the gain over frequency which is caused by input
capacitance.
T o calibrate this circuit, first adjust trimmer R1 for common-
mode rejection with +10 volts dc applied to the input pins.
Next, adjust R2 for zero offset at V
OUT
with both inputs
grounded. T rim the circuit a second time for optimal
performance.
T he –3 dB small signal bandwidth for this low power instru-
mentation amplifier is 700 kHz for a gain of 1 and 10 kHz for a
gain of 100. T he typical output slew rate is 1.8 V/
μ
s.
Figure 29. Low Power Instrumentation Amplifier
相关PDF资料 |
PDF描述 |
|---|---|
| AD648KN | Dual Precision, Low Power BiFET Op Amp |
| AD648KR | Dual Precision, Low Power BiFET Op Amp |
| AD648S | Dual Precision, Low Power BiFET Op Amp |
| AD648SQ | Dual Precision, Low Power BiFET Op Amp |
| AD648T | Dual Precision, Low Power BiFET Op Amp |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD648KN | 制造商:Rochester Electronics LLC 功能描述:LOW POWER DUAL OP AMP IC - Bulk 制造商:Analog Devices 功能描述:IC OP AMP DUAL BIFET DIP8 648 |
| AD648KN/+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Operational Amplifier |
| AD648KNZ | 功能描述:IC OPAMP BIFET 1MHZ DUAL LP 8DIP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:45nA 电压 - 输入偏移:2000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:40mA 电压 - 电源，单路/双路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) 其它名称:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD648KR | 制造商:Analog Devices 功能描述:OP Amp Dual GP ±18V 8-Pin SOIC N 制造商:Rochester Electronics LLC 功能描述:LOW POWER DUAL OP AMP IC - Bulk |
| AD648KR-REEL | 制造商:Analog Devices 功能描述:OP Amp Dual GP ±18V 8-Pin SOIC N T/R |
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