Datasheet
20
LTC1420
1420fa
LT/TP 0105 1K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1999
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
PART NUMBER DESCRIPTION COMMENTS
LTC1405 12-Bit, 5Msps, Sampling ADC with Parallel Output Pin Compatible with the LTC1420
LTC1412 12-Bit, 3Msps, Sampling ADC with Parallel Output Best Dynamic Performance, SINAD = 72dB at Nyquist
LTC1415 Single 5V, 12-Bit, 1.25Msps with Parallel Output 55mW Power Dissipation, 72dB SINAD
LT1019 Precision Bandgap Reference 0.05% Max Initial Accuracy, 5ppm/°C Max Drift
TYPICAL APPLICATION
U
RELATED PARTS
FREQUENCY (MHz)
0
–120
AMPLITUDE (dB)
–100
–80
–60
–40
–20
0
1234
1420 TA06
5
f
SAMPLE
= 10Msps
f
IN
= 1.0083MHz, 2V
P-P
SFDR = 83dB
SINAD = 69.8dB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
+A
IN
–A
IN
V
CM
SENSE
V
REF
GND
V
DD
GND
D11
D10
D9
D8
D7
D6
GAIN
OF
CLK
V
SS
GND
V
DD
OV
DD
OGND
D0
D1
D2
D3
D4
D5
3.3V
ANALOG INPUT
(2.048V
P-P
)
15Ω
+
–
15Ω
LTC1420
3.3V
5V
5V
1µF
1µF
TO PIN 7
OVERFLOW BIT
0V TO 3.3V
12-BIT DATA
470pF, NPO
1µF
1µF
1420 TA05
1µF
0.1µF0.1µF
15µF
100k
10MHz CLOCK
+
15µF
+
32.4k
V
IN
LT1613
4.7µH
1.4MHz BOOST REGULATOR
GND
SW
SHDN FB
SHDN
Single 3.3V Supply, 10Msps, 12-Bit ADC
4096 Point FFT of Above Circuit with a 1MHz Input. Note That There
Are No Spurs From the 1.4MHz Boost Regulator