Datasheet

LTC1196/LTC1198
10
119698fb
TYPICAL PERFORMANCE CHARACTERISTICS
4096 Point FFT Plot at 5V
FFT Output of 455kHz AM Signal
Digitized at 1Msps
4096 Point FFT Plot at 2.7V
FREQUENCY (kHz)
0
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
400
1196/98 G25
100
200
300
500
V
CC
= 5V
f
IN
= 29kHz
f
SMPL
= 882kHz
MAGNITUDE (dB)
FREQUENCY (kHz)
0
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
150
1196/98 G26
50
100
200
V
CC
= 2.7V
f
IN
= 29kHz
f
SMPL
= 340kHz
MAGNITUDE (dB)
FREQUENCY (kHz)
0
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
400
1196/98 G27
100
200
300
500
V
CC
= 5V
f
IN
= 455kHz WITH 20kHz AM
f
SMPL
= 1MHz
MAGNITUDE (dB)
Power Supply Feedthrough
vs Ripple Frequency
Power Supply Feedthrough
vs Ripple Frequency
S/(N + D) vs Reference Voltage
and Input Frequency
RIPPLE FREQUENCY (Hz)
1k
0
–10
–20
–30
–40
–50
–60
–70
10k 100k 1M
1196/98 G28
FEEDTHROUGH (dB)
T
A
= 25°C
V
CC
(V
RIPPLE
= 20mV)
f
CLK
= 12MHz
RIPPLE FREQUENCY (Hz)
1k
0
–10
–20
–30
–40
–50
–60
–70
10k 100k 1M
1196/98 G29
FEEDTHROUGH (dB)
T
A
= 25°C
V
CC
(V
RIPPLE
= 10mV)
f
CLK
= 5MHz
REFERENCE VOLTAGE (V)
1.25
SIGNAL TO NOISE PLUS DISTORTION (dB)
50
45
40
35
30
25
2.75 3.75 5.25
1196/98 G30
-
1.75 2.25
3.25
4.25 4.75
V
CC
= 5V
f
IN
= 500kHz
f
IN
= 200kHz
f
IN
= 100kHz
Intermodulation Distortion at 2.7V Intermodulation Distortion at 5V S/(N + D) vs Input Level
FREQUENCY (kHz)
0
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
200
1196/98 G31
50
100
150
250
V
CC
= 2.7V
f1 = 100kHz
f2 = 110kHz
f
SMPL
= 420kHz
MAGNITUDE (dB)
FREQUENCY (kHz)
0
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
300
1196/98 G32
100
200
400
V
CC
= 5V
f1 = 200kHz
f2 = 210kHz
f
SMPL
= 750kHz
MAGNITUDE (dB)
INPUT LEVEL (dB)
–40
SIGNAL TO NOISE-PLUS-DISTORTION (dB)
50
40
30
20
10
0
–25 –15 0
1196/98 G33
–35 –30
–20
–10 –5
V
REF
= V
CC
= 5V
f
IN
= 500kHz
f
SMPL
= 1MHz