®
PCM67P/U
PCM69AP/AU
Advanced 1-Bit BiCMOS Dual 18-Bit
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q
18-BIT RESOLUTION DUAL AUDIO DAC
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EXCELLENT THD PERFORMANCE:
0.0025% (–92dB) at F/S, K Grade
1.0% (–40dB) at –60dB, K Grade
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HIGH S/N RATIO: 110dB typ (IHF-A)
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DUAL, CO-PHASE
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SINGLE SUPPLY +5V OPERATION
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LOW POWER: 75mW typical
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CAPABLE OF 16X OVERSAMPLING
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AVAILABLE IN SPACE SAVING
16-PIN DIP OR 20-PIN SOIC
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OPERATING TEMP RANGE:
–25
°
C to +85
°
C
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EXTREMELY LOW GLITCH ENERGY
DESCRIPTION
The PCM67 and PCM69A dual 18-bit DAC are low
cost, dual output 18-bit BiCMOS digital-to-analog con-
verters utilizing a novel architecture to achieve excel-
lent low level performance.
By combining a conventional thin-film R-2R ladder
DAC, a digital offset technique with analog correction
and an advanced one-bit DAC using first order noise
shaping technique, the PCM67 and PCM69A achieve
high resolution, minimal glitch, and low zero-crossing
distortion.
PCM67 digital offset occurs at bit 9, making it ideal for
high-performance CD players. PCM69A digital offset
occurs at bit 4, making it an excellent choice for digital
musical instruments and audio DSP.
Both PCM67 and PCM69A operate from a single +5V
supply. The low power consumption and small size (16-
pin PDIP or 20-pin SOIC) make these converters ideal
for a variety of digital audio applications.
10-Bit DAC plus
Analog Correction
Reference
Servo
Advanced 1-Bit
DAC
Analog Output Lch
Buffer
V
COM
Lch
10-Bit DAC plus
Analog Correction
Digital Signal In
Input
Interface
Advanced 1-Bit
DAC
Buffer
V
COM
Rch
Analog Output Rch
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
© 1992 Burr-Brown Corporation
• 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
PDS-1168A
Printed in U.S.A. August, 1993
SBAS024
BURR-BROWN [ BURR-BROWN CORPORATION ]
