Specification	LM48822TLX/NOPB

Features	Volume Control, Mute, Shutdown, Differential Inputs, I2C, Depop
Max Output Power x Channels @ Load	40 mW
Max Output Power x Channels @ Load [custom]	2
Max Output Power x Channels @ Load [custom]	32 Ohm
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Type	Headphones, 2-Channel (Stereo)
Package / Case	16-WFBGA, DSBGA
Supplier Device Package	16-DSBGA
Type	Class AB
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.4 V

LM48822 Series

35-mW, stereo, analog input headphone amplifier with I2C control interface

Part	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Max Output Power x Channels @ Load [custom]	Max Output Power x Channels @ Load [custom]	Max Output Power x Channels @ Load	Supplier Device Package	Type	Features	Output Type	Package / Case
Texas Instruments LM48822TL/NOPB	2.4 V	5.5 V	Surface Mount	85 °C	-40 °C	2	32 Ohm	40 mW	16-DSBGA (2.5x2.12)	Class AB	Depop Differential Inputs I2C Mute Shutdown Volume Control	Headphones 2-Channel (Stereo)	16-WFBGA DSBGA
Texas Instruments LM48822TLX/NOPB	2.4 V	5.5 V	Surface Mount	85 °C	-40 °C	2	32 Ohm	40 mW	16-DSBGA	Class AB	Depop Differential Inputs I2C Mute Shutdown Volume Control	Headphones 2-Channel (Stereo)	16-WFBGA DSBGA

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Bulk	213	$ 1.41
	Tape & Reel (TR)	3000	$ 1.33
		6000	$ 1.28
Texas Instruments	LARGE T&R	1	$ 2.27
		100	$ 1.99
		250	$ 1.40
		1000	$ 1.12

Description

General part information

LM48822 Series

The LM48822 is a single supply, ground-referenced stereo headphone amplifier designed for portable devices, such as cell phones, where board space is at a premium. The LM48822 features TI’s ground-referenced architecture, which eliminates the large DC blocking capacitor required by traditional headphone amplifiers, saving board space and minimizing system cost.

The LM48822 features common-mode sensing that corrects for any differences between the amplifier ground and the potential at the headphone return terminal, minimizing noise created by any ground mismatches.

The LM48822 delivers 35mW/channel into a 16Ω load with <1% THD+N with a 3.6V supply. High power supply rejection ratio (PSRR), of 110dB at 217Hz, allows the device to operate in noisy environments without additional power supply conditioning. Flexible power supply requirements allow operation from 2.4V to 5.5V. The LM48822 has a differential inputs for improved noise rejection. High output impedance in Shutdown mode, combined with a charge pump-only mode allows the LM48822's outputs to be driven by an external source without degrading the source signal. Additionally, the LM48822 features a 64-step I2C volume control and mute function. The low power Shutdown mode reduces supply current consumption to 0.06µA.

Documents

Technical documentation and resources

Gnd-Ref Ultra Hi PSRR, 35mW/Ch Stereo Hdph Amp w/Com Mode Sense & I2C Vol Ctrl datasheet (Rev. C)

Data sheet