LM4550BVH/NOPB National Semiconductor, LM4550BVH/NOPB Datasheet - Page 7

• Manufacturer Part Number: LM4550BVH/NOPB
• Description: IC AC '97 AUDIO CODEC 48-LQFP
• Manufacturer: National Semiconductor
• Type: Audio Codec '97r

Specifications of LM4550BVH/NOPB

• Data Interface: Serial
• Resolution (bits): 18 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 90 / 89
• Voltage - Supply, Analog: 4.2 V ~ 5.5 V
• Voltage - Supply, Digital: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Audio Codec Type: Stereo
• No. Of Adcs: 2
• No. Of Dacs: 2
• No. Of Input Channels: 8
• No. Of Output Channels: 3
• Adc / Dac Resolution: 18bit
• Sampling Rate: 48kSPS
• Interface Type: Serial
• Supply Voltage Range: 3V To 5.5V, 4.2V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM4550BVH; *LM4550BVH/NOPB; LM4550BVH

Typical Application
APPLICATION HINTS
• The LM4550B must be initialized by using RESET# to perform a Power On Reset as shown in the Power On Reset Timing
• Don’t leave unused Analog inputs floating. Tie all unused inputs together and connect to Analog Ground through a capacitor
• Do not leave CD_GND floating when using the CD stereo input. CD_GND is the AC signal reference for the CD channels and
• If using a non-standard AC Link controller take care to keep the SYNC and SDATA_OUT signals low during Cold Reset to
• The PC_Beep input should be explicitly muted if not used since it defaults to 0 dB gain on reset, unlike the mute default of the
Diagram
(e.g. 0.1 µF)
should be connected to the CD source ground (Analog Ground may also be acceptable) through a 1 µF capacitor
avoid accidentally activating the ATE or Vendor test modes
other analog inputs
FIGURE 1. LM4550B Typical Application Circuit, Single Codec, 1 Vrms inputs
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