49%
FPO
®
PCM1702P
PCM1702U
BiCMOS Advanced Sign Magnitude 20-Bit
DIGITAL-TO-ANALOG CONVERTER
FEATURES
DESCRIPTION
q ULTRA LOW –96dB max THD+N
(No External Adjustment Required)
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 eliminates 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.
q
q
q
q
q
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)
Applications include very low distortion frequency
synthesis and high-end consumer and professional
digital audio applications.
q CAPABLE OF 16X OVERSAMPLING
q COMPLETE WITH REFERENCE
q LOW POWER (150mW typ)
Clock
Data
LE
DCOM
ACOM
+VCC
–VCC
Input Shift Register
and Control Logic
Balanced Current
Segment DAC A
Balanced Current
Segment DAC B
IOUT
Reference
and
Servo
Bipolar Offset
RF DC
SERV DC
BPO DC
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
• Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1993 Burr-Brown Corporation
PDS-1175B
1
SBAS026
Printed in U.S.A. June, 1995
PCM1702
®
