Datasheet

LTC2414/LTC2418
7
241418fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Total Unadjusted Error
(V
CC
= 5V, V
REF
= 5V)
Total Unadjusted Error
(V
CC
= 5V, V
REF
= 2.5V)
Total Unadjusted Error
(V
CC
= 2.7V, V
REF
= 2.5V)
Integral Nonlinearity
(V
CC
= 5V, V
REF
= 5V)
Integral Nonlinearity
(V
CC
= 5V, V
REF
= 2.5V)
Integral Nonlinearity
(V
CC
= 2.7V, V
REF
= 2.5V)
Noise Histogram
(V
CC
= 5V, V
REF
= 5V)
Noise Histogram
(V
CC
= 2.7V, V
REF
= 2.5V)
Long Term ADC Readings
INPUT VOLTAGE (V)
–2.5 –2.0 –1.0 0 1.0 2.0
TUE (ppm OF V
REF
)
3
2
1
0
–1
–2
–3
–1.5
–0.5
0.5 1.5
241418 G01
2.5
F
O
= GND
V
CC
= 5V
V
REF
= 5V
V
INCM
= V
REFCM
= 2.5V
T
A
= 25°C
T
A
= –45°C
T
A
= 85°C
INPUT VOLTAGE (V)
–1.25
TUE (ppm OF V
REF
)
3
2
1
0
–1
–2
–3
–0.75
–0.25 0.25 0.75
241418 G02
1.25
F
O
= GND
V
CC
= 5V
V
REF
= 2.5V
V
INCM
= V
REFCM
= 1.25V
T
A
= 25°C
T
A
= 85°C
T
A
= –45°C
INPUT VOLTAGE (V)
–1.25
TUE (ppm OF V
REF
)
–0.75
–0.25 0.25 0.75
241418 G03
1.25
8
6
4
2
0
–2
–4
–6
–8
F
O
= GND
V
CC
= 2.7V
V
REF
= 2.5V
V
INCM
= V
REFCM
= 1.25V
T
A
= 85°C
T
A
= –45°C
T
A
= 25°C
INPUT VOLTAGE (V)
–2.5 –2.0 –1.0 0 1.0 2.0
INL (ppm OF V
REF
)
3
2
1
0
–1
–2
–3
–1.5
–0.5 0.5 1.5
241418 G04
2.5
F
O
= GND
V
CC
= 5V
V
REF
= 5V
V
INCM
= V
REFCM
= 2.5V
T
A
= 25°C
T
A
= –45°C
T
A
= 85°C
INPUT VOLTAGE (V)
INL (ppm OF V
REF
)
3
2
1
0
–1
–2
–3
241418 G05
F
O
= GND
V
CC
= 5V
V
REF
= 2.5V
V
INCM
= V
REFCM
= 1.25V
T
A
= 25°C
T
A
= 85°C
T
A
= –45°C
–1.25
–0.75
–0.25 0.25 0.75 1.25
INPUT VOLTAGE (V)
–1.25
INL (ppm OF V
REF
)
–0.75
–0.25 0.25 0.75
241418 G06
1.25
8
6
4
2
0
–2
–4
–6
–8
F
O
= GND
V
CC
= 2.7V
V
REF
= 2.5V
V
INCM
= V
REFCM
= 1.25V
T
A
= 85°C
T
A
= –45°C
T
A
= 25°C
OUTPUT CODE (ppm OF V
REF
)
–1.2
NUMBER OF READINGS (%)
30
25
20
15
10
5
0
–0.6 0
241418 G07
0.6
10,000 CONSECUTIVE READINGS
F
O
= GND
T
A
= 25°C
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
V
INCM
= 2.5V
GAUSSIAN
DISTRIBUTION
m = –0.24ppm
σ = 0.183ppm
OUTPUT CODE (ppm OF V
REF
)
NUMBER OF READINGS (%)
14
12
10
8
6
4
2
0
241418 G08
–2.4
–1.8
–1.2 –0.6 0 0.6 1.2
10,000 CONSECUTIVE READINGS
F
O
= GND
T
A
= 25°C
V
CC
= 2.7V
V
REF
= 2.5V
V
IN
= 0V
V
INCM
= 2.5V
GAUSSIAN
DISTRIBUTION
m = –0.48ppm
σ = 0.375ppm
TIME (HOURS)
0
ADC READING (ppm OF V
REF
)
1.0
0.5
0
–0.5
–1.0
–1.5
10
20 30 40
LTXXXX • TPCXX
50 60
RMS NOISE = 0.19ppm
F
O
= GND
T
A
= 25°C
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
V
INCM
= 2.5V