LTC1401
TYPICAL APPLICATIONS
Interface to the TMS320C50’s TDM Serial Port (Frame Sync is Generated from TFSX)
5V
3V
+
10µF
0.1µF
+
8
1 VCC SHDN CLK 6
UNIPOLAR
INPUT
2 AIN
LTC1401
CONV
7
3 VREF
5
DOUT
GND
10µF
0.1µF
4
2.5MHz EXTERNAL CLOCK CLR LD P T
TMS320C50
QC 74HC161
TCLKX
CLK A B C D
TCLKR
TFSX
TFSR
CLKOUT
20MHz
TDR
LTC1401 • TA04a
LTC1401 Interface to the ADSP2181’s SPORT0 (Frame Sync is Generated from RFS)
3V
+
10µF
8
0.1µF
1
VCC
SHDN
CLK 6
UNIPOLAR
INPUT
2
AIN
LTC1401
CONV
7
3
VREF
5
DOUT
+
GND
10µF
0.1µF
ADSP2181
SCLKO
RFS
DR0
LTC1401 • TA05a
RELATED PARTS
12-Bit Parallel Output ADCs
PART NUMBER
LTC1273/LTC1275/LTC1276
DESCRIPTION
Complete 5V Sampling 12-Bit ADCs with 70dB SINAD at Niquist
LTC1274/LTC1277
LTC1278/LTC1279
Low Power 12-Bit ADCs with Nap and Sleep Mode Shutdown
High Speed Sampling 12-Bit ADCs with Shutdown
LTC1282
Complete 3V 12-Bit ADCs with 12mW Power Dissipation
LTC1409
Low Power 12-Bit, 800ksps Sampling ADC
LTC1410
12-Bit, 1.25Msps Sampling ADC with Shutdown
COMMENTS
Lower Power and Cost Effective for
fSAMPLE ≤ 300ksps
Lowest Power (10mW) fSAMPLE ≤ 100ksps
Cost Effective 12-Bit ADCs with Convert Start Input
Best for 300ksps < fSAMPLE ≤ 600ksps
Fully Specified for 3V Powered Applications,
fSAMPLE ≤ 140ksps
Best Dynamic Performance
fSAMPLE ≤ 800ksps, 80mW Dissipation
Best Dynamic Performance, THD = – 84dB and
SINAD = 71dB at Nyquist
12-Bit Serial Output ADCs
PART NUMBER
VCC
LTC1285/LTC1288
3V
LTC1286/LTC1298
5V
LTC1290
5/±5V
LTC1296
5/±5V
LTC1400
5/±5V
LTC1404
5/±5V
SAMPLE RATE
7.5/6.6ksps
12.5/11.1ksps
50ksps
46.5ksps
400ksps
600ksps
POWER DISSIPATION
0.48mW
1.25mV
30mW
30mW
75mW
75mW
DESCRIPTION
3V, One or Two Input, Micropower, SO-8
One or Two Input, Micropower, SO-8
8 Input, Full-Duplex Serial I/O
8 Input, Half-Duplex Serial I/O, Power Shutdown Output
Complete 12-Bit, 400ksps, SO-8 ADC with Shutdown
Complete 12-Bit, 600ksps, SO-8 ADC with Shutdown
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900q FAX:(408)434-0507 q www.linear-tech.com
1401f LT/TP 0598 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1998