PCM1750P_13 Datasheet, PDF (1/21 Pages) Texas Instruments – ANALOG-TO-DIGITAL CONVERTER

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PCM1750P
PCM1750U
SBAS007
Dual CMOS 18-Bit Monolithic Audio
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q DUAL 18-BIT LOW-POWER CMOS AUDIO
A/D CONVERTER
q FAST 4.5µs MIN CONVERSION TIME
INCLUDING S/H
q VERY LOW MAX THD+N: –88dB Without
External Adjust
q COMPLETE WITH INTERNAL
REFERENCE AND DUAL S/H FUNCTION
q TWO CO-PHASE SAMPLED, ±2.75V
AUDIO INPUTS
q CAPABLE OF 4X PER CHANNEL
OVERSAMPLING RATE
q RUNS ON ±5V SUPPLIES AND
DISSIPATES 300mW MAX
q COMPACT 28-PIN PLASTIC DIP OR SOIC
DESCRIPTION
The PCM1750 is a low cost, dual 18-bit CMOS
analog-to-digital converter optimized for dynamic sig-
nal applications. The PCM1750 features true co-phased
inputs with an internal sample/hold function for each
channel. The PCM1750 also comes complete with an
internal reference. Total power dissipation is less than
300mW max using ±5V voltage supplies. Low maxi-
mum Total Harmonic Distortion + Noise (–88dB max)
is 100% tested. The very fast PCM1750 is capable
of 4X x audio bandwidth oversampling rates on both
input channels simultaneously, providing greater free-
dom to designers in selecting input anti-aliasing fil-
ters.
PCM1750 outputs serial data in a format that is com-
patible with many digital filter chips and comes pack-
aged in a space saving 28-pin plastic DIP or SOIC.
MSB Adj Left
Offset Adj Left
V_IN Left
S _OUT Left
S_OUT Right
V_IN Right
Offset Adj Right
MSB Adj Right
CDAC
S/H
Left
CDAC
S/H
Right
Reference
Comp
18-Bit SAR
Latch
Latch
Shift Register
Control Logic
Comp
18-Bit SAR
Reference
Clock
Convert
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PDS-₁1084B
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P^PC^rintM^{ed i}1ⁿ 7^U.5^S.A0^{. October, 1993}