AD1994

Rev. 0 | Page 7 of 24

Pin No.

Mnemonic

In/Out

Description

50

NFR+

I

Right Channel Negative Feedback—Noninverting Input.

51

NFR−

I

Right Channel Negative Feedback—Inverting Input.

52

NC

No Connection—Should Be Left Floating.

53

AINR

I

Analog Input for Right Channel.

54

NC

No Connection—Should Be Left Floating.

55

REF_FILT

O

Filter Pin for Band Gap Reference—Should Be Bypassed to AGND.

56

AGND

Negative Power Supply for Low Power Analog Circuitry.

57

AVDD

Positive Power Supply for Low Power Analog Circuitry.

58

MOD_FILT

O

Modulator Filter Pin—Used to Set Time Constant of Modulator Order Reduction Circuit.

59

NC

No Connection—Should Be Left Floating.

60

AINL

O

Analog Input for Left Channel.

61

NC

No connection—Should Be Left Floating.

62

NFL−

I

Left Channel Negative Feedback—Inverting Input.

63

NFL+

I

Left Channel Negative Feedback—Noninverting Input.

64

MONO_EN

I

Mono Mode Enable Pin—When Pulled Up to Logic High.