DUT

ZL

AUDIO

ANALYZER

200 mVp-p

VDD

IN+

IN-

VDD

LPF

+

-

DUT

VDD

200 mVp-p

VDD

IN+

IN-

ZL

AUDIO

ANALYZER

LPF

LM48312

www.ti.com

SNAS494D – JANUARY 2010 – REVISED MAY 2013

Electrical Characteristics VDD = PVDD = 5V

(1)(2) (continued)

The following specifications apply for AV = 6dB, RL = 8Ω, f = 1kHz, unless otherwise specified. Limits apply for TA = 25°C.

LM48312

Units

Symbol

Parameter

Conditions

Min

Typ

Max

(Limits)

(3)

(4)

(3)

VDD = 5V, POUT = 1W

88

%

η

Efficiency

VDD = 3.3V, POUT = 400mW

85

%

SNR

Signal to Noise Ratio

PO = 1W

95

dB

CMVR

Common Mode Input Voltage Range

0

VDD – 0.25

V

Un-weighted, AV = 0dB

69

μV

εOS

Output Noise

A-weighted, AV = 0dB

48

μV

Test Circuits

Figure 3. PSRR Test Circuit

Figure 4. CMRR Test Circuit

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