LTC2411/LTC2411-1
6
Total Unadjusted Error
(VCC = 5V, VREF = 5V)
VIN (V)
–2.5 –2 –1.5 –1 –0.5 0
0.5
1
1.5
2
2.5
TUE
(ppm
OF
V
REF
)
2411 G01
3
2
1
0
–1
–2
–3
TA = 25°C
VCC = 5V
REF + = 5V
REF – = GND
VINCM = 2.5V
FO = GND
TA = –45°C
TA = 90°C
VIN (V)
–1.25
–0.75
–0.25
0.25
0.75
1.25
TUE
(ppm
OF
V
REF
)
2411 G02
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
VCC = 5V
REF + = 2.5V
REF – = GND
VINCM = 2.5V
FO = GND
TA = –45°C
TA = 90°C
TA = 25°C
VIN (V)
–1.25
TUE
(ppm
OF
V
REF
)
2
6
10
0.75
2411 G03
–2
–6
0
4
8
–4
–8
–10
– 0.75
– 0.25
0.25
1.25
TA = 90°C
VCC = 2.7V
REF + = 2.5V
REF – = GND
VINCM = 1.25V
FO = GND
TA = –45°C
TA = 25°C
Total Unadjusted Error
(VCC = 5V, VREF = 2.5V)
Total Unadjusted Error
(VCC = 2.7V, VREF = 2.5V)
Integral Nonlinearity
(VCC = 5V, VREF = 5V)
VIN (V)
–2.5 –2 –1.5 –1 –0.5 0
0.5
1
1.5
2
2.5
INL
(ppm
OF
V
REF
)
2411 G04
3
2
1
0
–1
–2
–3
TA = 25°C
TA = 90°C
VCC = 5V
REF + = 5V
REF – = GND
VINCM = 2.5V
FO = GND
TA = –45°C
Integral Nonlinearity
(VCC = 5V, VREF = 2.5V)
Integral Nonlinearity
(VCC = 2.7V, VREF = 2.5V)
VIN (V)
–1.25
–0.75
–0.25
0.25
0.75
1.25
INL
(ppm
OF
V
REF
)
2411 G01
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
VCC = 5V
REF + = 2.5V
REF – = GND
VINCM = 2.5V
FO = GND
TA = 90°C
TA = –45°C
TA = 25°C
VIN (V)
–1.25
INL
(ppm
OF
V
REF
)
2
6
10
0.75
2411 G06
–2
–6
0
4
8
–4
–8
–10
– 0.75
– 0.25
0.25
1.25
TA = 90°C
VCC = 2.7V
REF + = 2.5V
REF – = GND
VINCM = 1.25V
FO = GND
TA = –45°C
TA = 25°C
Noise Histogram
OUTPUT CODE (ppm OF VREF)
–2.0
NUMBER
OF
READINGS
(%)
6
8
10
–0.5
0.5
2411 G07
4
2
0
–1.5
–1.0
0
12
14
16
1
10,000 CONSECUTIVE
READINGS
VCC = 5V
VREF = 5V
VIN = 0V
VINCM = 2.5V
FO = GND
TA = 25°C
GAUSSIAN
DISTRIBUTION
m = –0.647ppm
σ = 0.287ppm
TIME (HOURS)
0
–2.0
ADC
READING
(ppm
OF
V
REF
)
–1.5
–1.0
–0.5
0
1.0
5 10 15 20
2411 G08
25 30 35 40 45 50 55 60
0.5
VCC = 5V, VREF = 5V, VIN = 0V, VINCM = 2.5V,
FO = GND, TA = 25°C, RMS NOISE = 0.29ppm
Long Term ADC Readings
INPUT DIFFERENTIAL VOLTAGE (V)
–2.5 –2 –1.5 –1 –0.5 0
0.5
1
1.5
2
2.5
RMS
NOISE
(ppm
OF
V
REF
)
2411 G09
0.5
0.4
0.3
0.2
0.1
0
TA = 25°C
VCC = 5V
VREF = 5V
VINCM = 2.5V
FO = GND
RMS Noise
vs Input Differential Voltage
TYPICAL PERFOR A CE CHARACTERISTICS
UW