Integrated Circuits (ICs)

LM4550VH/NOPB

Obsolete

Texas Instruments

IC AC '97 CODEC 48-LQFP

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Integrated Circuits (ICs)

LM4550VH/NOPB

Obsolete

Texas Instruments

IC AC '97 CODEC 48-LQFP

Deep-Dive with AI

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM4550VH/NOPB

Data Interface	Serial
Dynamic Range, ADCs / DACs (db) Typ [custom]	90 db
Dynamic Range, ADCs / DACs (db) Typ [custom]	89 db
Mounting Type	Surface Mount
Number of ADCs / DACs [custom]	2
Number of ADCs / DACs [custom]	2
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	48-LQFP
Resolution (Bits)	18 b
Sigma Delta	True
Supplier Device Package	48-LQFP (7x7)
Type	Audio, AC '97
Voltage - Supply, Analog [Max]	5.5 V
Voltage - Supply, Analog [Min]	4.2 V
Voltage - Supply, Digital [Max]	5.5 V
Voltage - Supply, Digital [Min]	3 V

LM4550B Series

AC '97 Rev 2.1 Codec with Sample Rate Conversion and National 3D Sound

Part	Package / Case	Type	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Resolution (Bits)	Number of ADCs / DACs [custom]	Number of ADCs / DACs [custom]	Dynamic Range, ADCs / DACs (db) Typ [custom]	Dynamic Range, ADCs / DACs (db) Typ [custom]	Mounting Type	Supplier Device Package	Data Interface	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]
Texas Instruments LM4550BVH/NOPB	48-LQFP	Audio AC '97	85 °C	-40 °C	4.2 V	5.5 V	18 b	2	2	90 db	89 db	Surface Mount	48-LQFP (7x7)	Serial	3 V	5.5 V
Texas Instruments LM4550BVH	48-LQFP	Audio AC '97	85 °C	-40 °C	4.2 V	5.5 V	18 b	2	2	90 db	89 db	Surface Mount	48-LQFP (7x7)	Serial	3 V	5.5 V
Texas Instruments LM4550VH/NOPB	48-LQFP	Audio AC '97	85 °C	-40 °C	4.2 V	5.5 V	18 b	2	2	90 db	89 db	Surface Mount	48-LQFP (7x7)	Serial	3 V	5.5 V
Texas Instruments LM4550BVHX	48-LQFP	Audio AC '97	85 °C	-40 °C	4.2 V	5.5 V	18 b	2	2	90 db	89 db	Surface Mount	48-LQFP (7x7)	Serial	3 V	5.5 V

Pricing

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

Distributor	Package	Quantity	$

Description

General part information

LM4550B Series

The LM4550B device is an audio codec for PC systems which is fully PC99 compliant and performs the analog intensive functions of the AC ’97 Rev 2.1 architecture. Using 18-bit Sigma-Delta ADCs and DACs, the LM4550B provides 90 dB of Dynamic Range.

The LM4550B was designed specifically to provide a high quality audio path and provide all analog functionality in a PC audio system. It features full duplex stereo ADCs and DACs and analog mixers with access to 4 stereo and 4 mono inputs.

Each mixer input has separate gain, attenuation and mute control and the mixers drive 1 mono and 2 stereo outputs, each with attenuation and mute control. The LM4550B provides a stereo headphone amplifier as one of its stereo outputs and also supports TI’s 3D sound stereo enhancement and a comprehensive sample rate conversion capability. The sample rate for the ADCs and DACs can be programmed separately with a resolution of 1 Hz to convert any rate from 4 kHz to 48 kHz. Sample timing from the ADCs and sample request timing for the DACs are completely deterministic to ease task scheduling and application software development. These features together with an extended temperature range also make the LM4550B suitable for non-PC codec applications.

Documents

Technical documentation and resources

No documents available