PCM1702-J Burr-Brown Corporation, PCM1702-J Datasheet

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PCM1702-J

Manufacturer Part Number
PCM1702-J
Description
BiCMOS Advanced Sign Magnitude 20-Bit DIGITAL-TO-ANALOG CONVERTER
Manufacturer
Burr-Brown Corporation
Datasheet
FEATURES
International Airport Industrial Park
© 1993 Burr-Brown Corporation
Tel: (520) 746-1111
ULTRA LOW –96dB max THD+N
(No External Adjustment Required)
NEAR-IDEAL LOW LEVEL OPERATION
GLITCH-FREE OUTPUT
120dB SNR TYP (A-Weight Method)
INDUSTRY STD SERIAL INPUT FORMAT
FAST (200ns) CURRENT OUTPUT
( 1.2mA)
CAPABLE OF 16X OVERSAMPLING
COMPLETE WITH REFERENCE
LOW POWER (150mW typ)
BiCMOS Advanced Sign Magnitude 20-Bit
DIGITAL-TO-ANALOG CONVERTER
Twx: 910-952-1111
DCOM
ACOM
Clock
+V
–V
Data
LE
CC
CC
®
Mailing Address: PO Box 11400
Input Shift Register
RF DC
and Control Logic
Cable: BBRCORP
Reference
Servo
and
SERV DC
Telex: 066-6491
FPO
PDS-1175B
49%
Tucson, AZ 85734
1
Balanced Current
Balanced Current
Segment DAC A
Segment DAC B
BPO DC
Bipolar Offset
DESCRIPTION
The PCM1702 is a precision 20-bit digital-to-analog
converter with ultra-low distortion (–96dB typ with a
full scale output). Incorporated into the PCM1702 is
an advanced sign magnitude architecture that elimi-
nates unwanted glitches and other nonlinearities around
bipolar zero. The PCM1702 also features a very low
noise (120dB typ SNR: A-weighted method) and fast
settling current output (200ns typ, 1.2mA step) which
is capable of 16X oversampling rates.
Applications include very low distortion frequency
synthesis and high-end consumer and professional
digital audio applications.
FAX: (520) 889-1510
• Street Address: 6730 S. Tucson Blvd.
Immediate Product Info: (800) 548-6132
PCM1702U
PCM1702P
PCM1702
Printed in U.S.A. June, 1995
I
OUT
• Tucson, AZ 85706
®

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PCM1702-J Summary of contents

Page 1

... Incorporated into the PCM1702 is an advanced sign magnitude architecture that elimi- nates unwanted glitches and other nonlinearities around bipolar zero. The PCM1702 also features a very low noise (120dB typ SNR: A-weighted method) and fast settling current output (200ns typ, 1.2mA step) which is capable of 16X oversampling rates ...

Page 2

... CC DD –V = –V = – –25 –55 + Noise ) / Signal . (3) D/A converter sample frequency (8 x 44.1kHz; 8x oversampling). RMS RMS RMS 2 PCM1702P/U, -J, -K TYP MAX UNITS Bits 110 dB TTL/CMOS Compatible + 0 (1) Serial, MSB First, BTC 12.5 20.0 MHz –92 –88 dB – ...

Page 3

... MNEMONIC DATA 11 CLOCK DCOM 15 – PACKAGE Marked PCM1702. Marked with white dot by pin 10. Marked with red dot by pin 10. – 100µ OUT 47µF + PCM1702 +0. BPO OUT ACOM ACOM SERV DC ...

Page 4

... Output Frequency (Hz) 16-BIT MONOTONICITY 1.5 1 0.5 0 –0.5 –1 –1.5 8.83ms/div –90dB SIGNAL (10Hz to 20kHz Bandwidth) 200 100 0 –100 –200 0 400 800 1200 Time (µs) ® PCM1702 –2 –4 –6 –8 10k –120 –80 –100 –120 –140 –160 –20 –40 1600 ...

Page 5

... The PCM1702 is a new solution to the problem. It combines all the advantages of a conventional DAC (excellent full scale performance, high signal-to-noise ratio and ease of use) with superior low-level performance ...

Page 6

... See the “–90dB Signal Spectrum” plot in the Typical Perfor- mance Curves section for the power spectrum of a PCM1702 at a –90dB output level. (The “–90dB Signal” plot shows the actual –90dB output of the DAC). The deviation from ideal for PCM1702 at this signal level is typically less than 0.3dB. For the “ ...

Page 7

... Latch Enable. Refer to Figure 2 for graphical relationships of these signals. Maximum Clock Rate A typical clock rate of 16.9MHz for the PCM1702 is derived by multiplying the standard audio sample rate of 44.1kHz by sixteen times (16X over-sampling) the standard audio word bit length of 24 bits (44.1kHz 16.9MHz). Note that this clock rate accommodates a 24-bit word length, even though only 20 bits are actually being used ...

Page 8

... FIGURE 4. Typical Application for Stereo Audio 8X Oversampling system. ® PCM1702 8 ...

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