®
PCM1760P/U
DF1760P/U
Multi-Bit Enhanced Noise Shaping 20-Bit
ANALOG-TO-DIGITAL CONVERSION SYSTEM
FEATURES
q
DUAL 20-BIT MONOLITHIC MODULATOR
(PCM1760) AND MONOLITHIC
DECIMATING DIGITAL FILTER (DF1760)
q
HIGH PERFORMANCE:
THD+N: –92dB typ, –90dB max
Dynamic Range: 108dB typ
SNR: 108dB min, 110dB typ
Channel Separation: 98dB typ, 94dB min
q
64X OVERSAMPLING
q
CO-PHASE CONVERSION
q
RUNS ON 256fs OR 384fs SYSTEM
CLOCK
q
VERSATILE INTERFACE CAPABILITY:
16-, 20-Bit Output
MSB First or LSB First Format
q
OPTIONAL FUNCTIONS:
Offset Error Calibration
Overflow Detection
Power Down Mode (DF1760)
q
RUNS ON
±
5V SUPPLIES (PCM1760) AND
5V SUPPLY (DF1760)
q
COMPACT 28-PIN PACKAGES:
28-Pin DIP and SOIC
PCM1760
DESCRIPTION
The PCM1760 and DF1760 combine for a low-cost,
high-performance dual 20-bit, 48kHz sampling ana-
log-to-digital conversion system which is specifically
designed for dynamic applications.
The PCM1760/DF1760 pair form a 4-bit, 4th order,
64X oversampling analog-to-digital converter.
The PCM1760 is a delta-sigma modulator that uses a
4-bit quantizer within the modulation loop to achieve
very high dynamic range.
The DF1760 is a high-performance decimating digital
filter. The DF1760 accepts 4-bit 64fs data from the
PCM1760 and decimates to 20-bit 1fs data.
The FIR filter of the DF1760 has pass-band ripple of
less than
±0.001dB
and greater than 100dB of the
reject band attenuation.
DF1760
Analog
Input (L)
4 Stage, 4-Bit
Delta-Sigma
Modulator
64fs
64fs
Timing
Control
and
Interface
256fs
1/16
Filter
4fs
FIR
Filter
fs
Timing
Control
and
Interface
Data
Analog
Input (R)
4 Stage, 4-Bit
Delta-Sigma
Modulator
System
Clock
256/384fs
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
PDS-1174C
Printed in U.S.A. July, 1994
1993 Burr-Brown Corporation
BURR-BROWN [ BURR-BROWN CORPORATION ]
