AD524(RevG) 查看數據表（PDF） - Analog Devices

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AD524
(Rev.:RevG)

Precision Instrumentation Amplifier

Analog Devices 

Data Sheet

By establishing a reference at the low side of a current setting

resistor, an output current may be defined as a function of input

voltage, gain, and the value of that resistor. Because only a small

current is demanded at the input of the buffer amplifier (A2)

AD524

the forced current, IL, largely flows through the load. Offset and

drift specifications of A2 must be added to the output offset and

drift specifications of the AD524.

–IN

+IN

–VS

+VS

1µF

35V

ANALOG

COMMON

1 PROTECTION

2 PROTECTION

3

INPUT

OFFSET

TRIM R1

4

10kΩ

5

6

+VS

20kΩ

20kΩ 20kΩ

20kΩ

20kΩ

16

15

R2

10kΩ

14

OUTPUT

OFFSET

TRIM

G = 10

K1

NC

4.44kΩ

13

404Ω

12

RELAY

SHIELDS

40Ω

11

G = 100

K2

G = 1000

K3

7

A1

AD524

8

20kΩ

10

OUT

9

+5V

K1

D1 K2

D2 K3

D3

C1 C2

K1 – K3 =

THERMOSEN DM2C

4.5V COIL

D1 – D3 = IN4148

GAIN TABLE

A B GAIN

0 0 10

0 1 1000

1 0 100

1 11

INPUTS

GAIN

A

RANGE B

+5V

1

16

Y0

2

15

Y1

3

4

74LS138 14

DECODER 13

Y2

5

6

7

NC = NO CONNECT

Figure 47. Three-Decade Gain Programmable Amplifier

1

16

2

3 7407N

4

BUFFER

DRIVER

5

6

7

10µF

LOGIC

COMMON

Rev. G | Page 19 of 25

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