SM5841H Datasheet, PDF (1/20 Pages) Nippon Precision Circuits Inc – Audio Multi-function Digital Filter

NIPPON PRECISION CIRCUITS INC.
SM5841H
Audio Multi-function Digital Filter
OVERVIEW
The SM5841H is an 8-times oversampling (interpo-
lation) digital filter for digital audio reproduction
equipment. It accepts 16 or 18-bit input data, and
outputs data in 16, 18 or 20-bit format, making a
wide range of interfaces possible. It also features
digital deemphasis for 3 sampling frequencies, a
noise shaper to reduce quantization noise, a DC off-
set output and other circuits.
ORDERING INFOMATION
Device
SM5841HP
SM5841HS
Package
18pin DIP
22pin SOP
FEATURES
Functions
s 2-channel processing
s 8-times (8fs) oversampling (interpolation)
s Digital deemphasis (fs = 48/44.1/32 kHz)
s Serial input data
2s complement, MSB first, 16/18-bit
s Serial output data
2s complement, MSB first, 16/18/20-bit
s 1st-order noise shaper (for 16/18-bit output only)
s 256fs/384fs system clock selectable
s Output data DC offset (approximately 0.8%)
ON/OFF control
s TTL-compatible input/outputs
s 5 V (standard) supply
s 3.2 V operating voltage
s Molybdenum-gate CMOS
Filter Characteristics
s 3-stage DC FIR interpolation filter
1st stage (fs → 2fs), 69-tap
2nd stage (2fs → 4fs), 13-tap
3rd stage (4fs → 8fs), 9-tap
s IIR deemphasis filter for gain and phase character-
istics close to those of analog filters
s Overflow limiter built-in
APPLICATIONS
s Digital amplifiers
s CD players
s DAT players
s DBS systems
s PCM systems
NIPPON PRECISION CIRCUITS—1