LTC1420I データシートの表示（PDF） - Linear Technology
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LTC1420I Datasheet PDF : 20 Pages
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LTC1420
TYPICAL APPLICATION
Single 3.3V Supply, 10Msps, 12-Bit ADC
3.3V
0.1µF
15Ω
ANALOG INPUT +
(2.048VP-P) –
15Ω
470pF, NPO
1µF
+
15µF
1.4MHz BOOST REGULATOR
4.7µH
SHDN
VIN
SW
LT1613
SHDN
FB
GND
5V
+
100k 15µF
0.1µF
32.4k
1µF
1µF
LTC1420
1 +AIN
28
GAIN
2 –AIN
OF 27
3
VCM
CLK 26
4 SENSE VSS 25
5 VREF
24
GND
6 GND
23
VDD
7 VDD
OVDD 22
8
21
GND OGND
9 D11
D0 20
10 D10
D1 19
11 D9
D2 18
12
D8
17
D3
13 D7
D4 16
14 D6
D5 15
OVERFLOW BIT
10MHz CLOCK
3.3V
1µF
5V
TO PIN 7
1µF
0V TO 3.3V
12-BIT DATA
4096 Point FFT of Above Circuit with a 1MHz Input. Note That There
Are No Spurs From the 1.4MHz Boost Regulator
0
fSAMPLE = 10Msps
fIN = 1.0083MHz, 2VP-P
–20
SFDR = 83dB
SINAD = 69.8dB
–40
–60
–80
–100
–120
0
1
2
3
4
5
FREQUENCY (MHz)
1420 TA06
1420 TA05
RELATED PARTS
PART NUMBER
LTC1405
LTC1412
LTC1415
LT1019
DESCRIPTION
12-Bit, 5Msps, Sampling ADC with Parallel Output
12-Bit, 3Msps, Sampling ADC with Parallel Output
Single 5V, 12-Bit, 1.25Msps with Parallel Output
Precision Bandgap Reference
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
COMMENTS
Pin Compatible with the LTC1420
Best Dynamic Performance, SINAD = 72dB at Nyquist
55mW Power Dissipation, 72dB SINAD
0.05% Max Initial Accuracy, 5ppm/°C Max Drift
1420f LT/TP 1299 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1999
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