AS3412 datasheet(29/84 Pages) AMSCO

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ams Datasheet

Page 29

[v1-00] 2016-Apr-06

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AS3412 − Detailed Description

Parameter

VBAT =1.8V, TA= 25ºC, Rinput = RFB = 1kΩ unless otherwise

specified.

Figure 35:

Operational Amplifier Parameter

Operational Amplifier: This table shows the detailed electrical characteristics of the operational amplifiers to be

used for ANC signal processing.

Note(s):

1. SNR figure measured with 20dB gain to minimize audio analyzer noise floor

Symbol

Parameter

Condition

Min

Typ

Max

Unit

VLIN

Input Signal Level

Gain=0dB

0.9*VBAT

VBAT

VPEAK

SNR

Signal to Noise Ratio

10k

Ω load, Gain = 0dB(1),

VBAT=1.8V,

High Quality Mode

122.5

10k

Ω load, Gain = 0dB, VBAT=1.65V

High Quality Mode

121.5

10k

Ω load, Gain = 0dB, VBAT=1.8V,

ECO Mode

121

10k

Ω load, Gain = 0dB, VBAT=1.65V,

ECO Mode

119.5

IOP1

Block Current

Consumption

VBAT = 1.8V; OP1L and OP1R

enabled, normal mode

0.85

1.25

1.75

VBAT = 1.8V; OP1L and OP1R

enabled, ECO mode

0.65

0.9

1.37

VBAT = 1.65V; OP1L and OP1R

enabled, normal mode

0.8

1.2

1.68

VBAT = 1.65V; OP1L and OP1R

enabled, ECO mode

0.6

0.85

1.32

VNOISE-A

Input Referred Noise

Floor A-Weighted

High Quality Mode

900

ECO Mode

1.1

μV

Voffset

DC offset voltage

Gain = 0dB

Load Capacitance

100

ALoop

Open Loop Gain

100Hz

120

Load Impedance

kΩ

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