LM4917MTSLASHNOPB datasheet(5/25 Pages) TI1

5 / 25 page

LM4917

www.ti.com

SNAS238G – AUGUST 2004 – REVISED MAY 2013

Electrical Characteristics VDD = 3V

(1)

The following specifications apply for VDD = 3V, AV = 1, and 16Ω load unless otherwise specified. Limits apply to TA = 25°C.

LM4917

Units

Symbol

Parameter

Conditions

(Limits)

Typ(2)

Limit(3)(4)

IDD

Quiescent Power Supply Current

VIN = 0V, IO = 0A, both channels enabled

mA (max)

VIN = 0V, IO = 0A, one channel enabled

ISD

Shutdown Current

VSD_LC = VSD_RC = GND

0.01

µA (max)

VOS

Output Offset Voltage

RL = 32Ω

mV (max)

Output Power

THD+N = 1% (max); f = 1kHz, RL = 16Ω

mW (min)

THD+N = 1% (max); f = 1kHz, RL = 32Ω

PO = 50mW, f = 1kHz, RL = 32Ω

THD+N

Total Harmonic Distortion + Noise

0.02

(A-weighted) single channel

VRIPPLE = 200mV sine p-p,

PSRR

Power Supply Rejection Ratio

f = 1kHz

f = 20kHz

SNR

Signal-to-Noise Ratio

RL = 32Ω, POUT = 20mW, f = 1kHz

100

VIH =

VIH

Shutdown Input Voltage High

V (min)

0.7*CPVDD

VIL =

VIL

Shutdown Input Voltage Low

V (max)

0.3*CPVDD

TWU

Wake Up Time From Shutdown

339

µs (max)

XTALK

Crosstalk

RL = 16Ω, PO = 1.6mW, f = 1kHz

Input Leakage Current

±0.1

(1)

All voltages are measured with respect to the GND pin unless otherwise specified.

(2)

Typicals are measured at 25°C and represent the parametric norm.

(3)

Limits are specifed to Texas Instruments' AOQL (Average Outgoing Quality Level).

(4)

Datasheet min/max specification limits are specified by design, test, or statistical analysis.

External Components Description

(See Figure 1)

Components

Functional Description

Inverting input resistance which sets the closed-loop gain in conjunction with Rf. This resistor also forms a high-pass

filter with Ci at fc = 1 / (2πRiCi).

Input coupling capacitor which blocks the DC voltage at the amplifier's input terminals. Also creates a high-pass filter

with Ri at fc = 1 / (2πRiCi). Refer to the section Proper Selection of External Components, for an explanation of

how to determine the value of Ci.

Feedback resistance which sets the closed-loop gain in conjunction with Ri.

Flying capacitor. Low ESR ceramic capacitor (

≤100mΩ)

Output capacitor. Low ESR ceramic capacitor (

≤100mΩ)

Tantalum capacitor. Supply bypass capacitor which provides power supply filtering. Refer to the POWER SUPPLY

BYPASSING section for information concerning proper placement and selection of the supply bypass capacitor.

Ceramic capacitor. Supply bypass capacitor which provides power supply filtering. Refer to the POWER SUPPLY

BYPASSING section for information concerning proper placement and selection of the supply bypass capacitor.

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