ADA4950-1/ADA4950-2

Rev. 0 | Page 8 of

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PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

1

+INB

2

+INA

3

–INA

4

–INB

11 –OUT

12 PD

10 +OUT

ADA4950-1

TOP VIEW

(Not to Scale)

PIN 1

INDICATOR

NOTES

1. SOLDER THE EXPOSED PADDLE ON THE BACK OF

THE PACKAGE TO A GROUND PLANE OR TO A

POWER PLANE.

Figure 5. ADA4950-1 Pin Configuration

PIN 1

INDICATOR

1

2

3

4

5

6

15

16

17

18

14

13

TOP VIEW

(Not to Scale)

ADA4950-2

–INA1

–INB1

+INB2

+INA2

+OUT1

PD2

–OUT2

NOTES

1. SOLDER THE EXPOSED PADDLE ON THE BACK OF

THE PACKAGE TO A GROUND PLANE OR TO A

POWER PLANE.

Figure 6. ADA4950-2 Pin Configuration

Table 9. ADA4950-1 Pin Function Descriptions

Pin No.

Mnemonic

Description

1

+INB

Positive Input B, 250 Ω Input. Use alone for G = 2 or tie to +INA for G = 3.

2

+INA

Positive Input A, 500 Ω Input. Use alone for G = 1 or tie to +INB for G = 3.

3

−INA

Negative Input A, 500 Ω Input. Use alone for G = 1 or tie to −INB for G = 3.

4

−INB

Negative Input B, 250 Ω Input. Use alone for G = 2 or tie to −INA for G = 3.

5 to 8

Positive Supply Voltage.

9

Output Common-Mode Voltage.

10

+OUT

Positive Output.

11

−OUT

Negative Output.

12

PD

Power-Down Pin.

13 to 16

Negative Supply Voltage.

17 (EPAD)

Exposed Paddle (EPAD)

Solder the exposed paddle on the back of the package to a ground plane or to a power plane.

Table 10. ADA4950-2 Pin Function Descriptions

Pin No.

Mnemonic

Description

1

−INA1

Negative Input A, Amplifier 1, 500 Ω Input. Use alone for G = 1 or tie to –INB1 for G = 3.

2

−INB1

Negative Input B, Amplifier 1, 250 Ω Input. Use alone for G = 2 or tie to –INA1 for G = 3.

3, 4

Positive Supply Voltage, Amplifier 1.

5

+INB2

Positive Input B, Amplifier 2, 250 Ω Input. Use alone for G = 2 or tie to +INA2 for G = 3.

6

+INA2

Positive Input A, Amplifier 2, 500 Ω Input. Use alone for G = 1 or tie to +INB2 for G = 3.

7

−INA2

Negative Input A, Amplifier 2, 500 Ω Input. Use alone for G = 1 or tie to –INB2 for G = 3.

8

−INB2

Negative Input B, Amplifier 2, 250 Ω Input. Use alone for G = 2 or tie to –INA2 for G = 3.

9, 10

Positive Supply Voltage, Amplifier 2.

11

Output Common-Mode Voltage, Amplifier 2.

12

+OUT2

Positive Output, Amplifier 2.

13

−OUT2

Negative Output, Amplifier 2.

14

PD2

Power-Down Pin, Amplifier 2.

15, 16

Negative Supply Voltage, Amplifier 2.

17

Output Common-Mode Voltage, Amplifier 1.

18

+OUT1

Positive Output, Amplifier 1.

19

−OUT1

Negative Output, Amplifier 1.

20

PD1

Power-Down Pin, Amplifier 1.

21, 22

Negative Supply Voltage, Amplifier 1.

23

+INB1

Positive Input B, Amplifier 1, 250 Ω Input. Use alone for G = 2 or tie to +INA1 for G = 3.

24

+INA1

Positive Input A, Amplifier 1, 500 Ω Input. Use alone for G = 1 or tie to +INB1 for G = 3.

25 (EPAD)

Exposed Paddle (EPAD)

Solder the exposed paddle on the back of the package to a ground plane or to a power plane.