Datasheet

LTC1864/LTC1865
9
18645fb
TYPICAL PERFORMANCE CHARACTERISTICS
Change in Gain Error vs
Temperature
Histogram of 4096 Conversions of
a DC Input Voltage 4096 Point FFT Nonaveraged
SINAD vs Frequency THD vs Frequency SFDR vs Frequency
Change in Offset Error vs
Reference Voltage Change in Offset vs Temperature
Change in Gain Error vs
Reference Voltage
REFERENCE VOLTAGE (V)
0
CHANGE IN OFFSET ERROR (LSB)
75
50
25
0
–25
4
18645 G10
1
2
3
5
V
CC
= 5V
T
A
= 25°C
TEMPERATURE (°C)
–50
CHANGE IN OFFSET (LSB)
5
4
3
2
1
0
–1
–2
–3
–4
–5
0
50
75
18645 G11
–25
25
100
125
V
CC
= 5V
V
REF
= 5V
REFERENCE VOLTAGE(V)
0
CHANGE IN GAIN ERROR (LSB)
20
15
10
5
0
–5
–10
–15
–20
2
4
5
18645 G12
1
3
V
CC
= 5V
T
A
= 25°C
TEMPERATURE (°C)
–50
CHANGE IN GAIN ERROR (LSB)
5
4
3
2
1
0
–1
–2
–3
–4
–5
0
50
75
18645 G13
–25
25
100
125
V
CC
= 5V
V
REF
= 5V
FREQUENCY
1800
1600
1400
1200
1000
800
600
400
200
0
CODE
18645 G14
–4 –3 –2 –1
0
1
2345
00 1200
1534
127
516
1178
729
V
CC
= 5V
T
A
= 25°C
V
REF
= 5V
FREQUENCY (kHz)
AMPLITUDE (dB)
0
–20
–40
–60
–80
–100
–120
–140
18645 G15
0
20
40 60 80 100 120
f
S
= 203.125kHz
f
IN
= 99.72763kHz
V
CC
= 5V
V
REF
= 5V
T
A
= 25°C
F
IN
(kHz)
1
SINAD (dB)
100
90
80
70
60
50
40
30
20
10
0
10 100 1000
18645 G16
V
CC
= 5V
V
REF
= 5V
T
A
= 25°C
V
IN
= 0dB
SNR
SINAD
F
IN
(kHz)
1
THD (dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
10 100 1000
18645 G17
V
CC
= 5V
V
REF
= 5V
T
A
= 25°C
V
IN
= 0dB
F
IN
(kHz)
1
SFDR (dB)
100
90
80
70
60
50
40
30
20
10
0
10 100 1000
18645 G18
V
CC
= 5V
V
REF
= 5V
T
A
= 25°C
V
IN
= 0dB