AD548B

更新时间： 2024-01-01 02:10:45

品牌	Logo	应用领域
亚德诺 - ADI		运算放大器
页数	文件大小	规格书
8页	200K
描述
Precision, Low Power BiFET Op Amp

阅读下载

获取价格

如果您发现信息不准确，欢迎纠错

AD548B 技术参数

AD548

O UTLINE D IMENSIO NS

D imensions shown in inches and (mm).

TO -99 (H ) P ackage

P lastic Mini-D IP (N) P ackage

Figure 30. Log Ratio Am plifier

compensation is provided by resistors R8 and R15, which have a

positive 3500 ppm/°C temperature coefficient. T he transfer

function for the output voltage is:

Cerdip (Q) P ackage

V_OUT= 1V log₁₀(I₂I )

Frequency compensation is provided by R11, R12, C1, and C2.

Small signal bandwidth is approximately 300 kHz at input cur-

rents above 100 µA and will proportionally decrease with lower

signal levels. D1, D2, R13, and R14 compensate for the effects

of the two logging transistors’ ohmic emitter resistance.

T o trim this circuit, set the two input currents to 10 µA and ad-

just V_OUTto zero by adjusting the potentiometer on A3. T hen

set I₂to 1 µA and adjust the scale factor such that the output

voltage is 1 V by trimming potentiometer R10. Offset adjust-

ment for A1 and A2 is provided to increase the accuracy of the

voltage inputs.

T his circuit ensures a 1% log conformance error over an input

current range of 300 pA to 1 mA, with low level accuracy

limited by the AD548’s input current. T he low level input volt-

age accuracy of this circuit is limited by the input offset voltage

and drift of the AD548.

SO IC (R) P ackage

–8–

REV. C

1...5 6 78

下载PDF

型号	品牌	描述	获取价格	数据表
AD548BH	ADI	Precision, Low Power BiFET Op Amp	获取价格
AD548BH/+	ADI	IC IC,OP-AMP,SINGLE,BIPOLAR/JFET,CAN,8PIN,METAL, Operational Amplifier	获取价格
AD548BN	ADI	IC OP-AMP, 800 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDIP8, MINI, PLASTIC, DIP-8, Operational A	获取价格
AD548BQ	ADI	IC OP-AMP, 800 uV OFFSET-MAX, 1 MHz BAND WIDTH, CDIP8, HERMETIC SEALED, CERDIP-8, Operatio	获取价格
AD548BQ/+	ADI	IC IC,OP-AMP,SINGLE,BIPOLAR/JFET,DIP,8PIN,CERAMIC, Operational Amplifier	获取价格
AD548BR	ADI	Precision, Low Power BiFET Op Amp	获取价格