LM4550BVH
NRNDAC '97 REV 2.1 CODEC WITH SAMPLE RATE CONVERSION AND NATIONAL 3D SOUND
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LM4550BVH
NRNDAC '97 REV 2.1 CODEC WITH SAMPLE RATE CONVERSION AND NATIONAL 3D SOUND
Technical Specifications
Parameters and characteristics for this part
| Specification | LM4550BVH |
|---|---|
| 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 |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tray | 250 | $ 9.35 | |
| Texas Instruments | JEDEC TRAY (10+1) | 1 | $ 12.55 | |
| 100 | $ 10.23 | |||
| 250 | $ 8.04 | |||
| 1000 | $ 6.82 | |||
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
