Data Sheet

ADA4961

Rev. C | Page 7 of 24

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

2

1

3

4

5

6

18

17

16

15

14

13

MODE

GND

GND

VIN–

VIN+

GND

LATCH

DNC

DNC

VOUT–

VOUT+

DNC

ADA4961

TOP VIEW

(Not to Scale)

NOTES

1. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.

2. CONNECT THE EXPOSED PAD TO GROUND.

Figure 3. Pin Configuration

Table 6. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 4, 5

GND

Power Supply Ground. Connect to system ground plane.

2, 3

VIN+, VIN−

Differential Inputs.

6

MODE

Mode Select Pin for Gain Control. Low indicates serial peripheral interface (SPI), and high (up to 3.3 V)

indicates parallel interface.

7

SDIO

Serial Data Input/Output Pin for SPI Gain Control.

8

A4/CLK

Bit A4 for Parallel Gain Control/Serial Clock Pin for SPI Gain Control.

9

A3/CS

Bit A3 for Parallel Gain Control/Chip Select Pin for SPI Gain Control.

10

A2/FA

Bit A2 for Parallel Gain Control/Fast Attack Pin for SPI Gain Control.

11

A1

Bit A1 for Parallel Gain Control.

12

A0

Bit A0 for Parallel Gain Control.

13

LATCH

Latch Input Asserts Parallel Gain Control. Logic 0 asserts transparent mode, and Logic 1 asserts latched mode.

14, 15, 18

DNC

Do Not Connect. Do not connect to this pin.

16, 17

VOUT−, VOUT+

Differential Outputs.

19

PWUP

Power-Up Control Input Pin. A logic high (3.3 V) asserts power-up. A logic low asserts power-down.

20

PM

Power/Performance Control Input Pin. A logic low indicates high power and high performance, and a logic

high indicates low power and nominal performance. Low power mode must be asserted with VMIN = 2.8 V.

21

VCC1

Positive Power Supply. Connect to 5 V or 3.3 V.

22

VCC2

Positive Power Supply. Connect to 5 V or 3.3 V.

23

VCC3

Positive Power Supply. Connect to 5 V or 3.3 V.

24

VCC4

Positive Power Supply. Connect to 5 V or 3.3 V.

EPAD

Exposed Pad. Connect the exposed pad to ground.