Datasheet
LTC2415/LTC2415-1
7
sn2415 24151fs
OUTPUT CODE (ppm OF V
REF
)
–212
–210.5 –209 –207.5 –206
NUMBER OF READINGS (%)
2415 G10
12
10
8
6
4
2
0
10,000 CONSECUTIVE
READINGS
V
CC
= 5V
V
REF
= 2.5V
V
IN
= 0V
REF
+
= 2.5V
REF
–
= GND
IN
+
= 1.25V
IN
–
= 1.25V
F
O
= GND
T
A
= 25°C
GAUSSIAN
DISTRIBUTION
m = –209.2ppm
σ = 0.56ppm
OUTPUT CODE (ppm OF V
REF
)
–211.5
–210.5 –209.5 –208.5 –207.5
NUMBER OF READINGS (%)
2415 G11
12
10
8
6
4
2
0
10,000 CONSECUTIVE
READINGS
V
CC
= 5V
V
REF
= 2.5V
V
IN
= 0V
REF
+
= 2.5V
REF
–
= GND
IN
+
= 1.25V
IN
–
= 1.25V
F
O
= 460800Hz
T
A
= 25°C
GAUSSIAN
DISTRIBUTION
m = –209.3ppm
σ = 0.49ppm
OUTPUT CODE (ppm OF V
REF
)
–210
–207 –204 –201 –198
NUMBER OF READINGS (%)
2415 G12
15
12
9
6
3
0
10,000 CONSECUTIVE
READINGS
V
CC
= 5V
V
REF
= 2.5V
V
IN
= 0V
REF
+
= 2.5V
REF
–
= GND
IN
+
= 1.25V
IN
–
= 1.25V
F
O
= 1075200Hz
T
A
= 25°C
GAUSSIAN
DISTRIBUTION
m = –206.5ppm
σ = 1.07ppm
OUTPUT CODE (ppm OF V
REF
)
–116
–114.5 –113 –111.5 –110
NUMBER OF READINGS (%)
2415 G13
12
10
8
6
4
2
0
10,000 CONSECUTIVE
READINGS
V
CC
= 2.7V
V
REF
= 2.5V
V
IN
= 0V
REF
+
= 2.5V
REF
–
= GND
IN
+
= 1.25V
IN
–
= 1.25V
F
O
= GND
T
A
= 25°C
GAUSSIAN
DISTRIBUTION
m = –113.1ppm
σ = 0.59ppm
OUTPUT CODE (ppm OF V
REF
)
–112
–110.9 –109.8 –108.6 –107.5
NUMBER OF READINGS (%)
2415 G14
10
8
6
4
2
0
10,000 CONSECUTIVE
READINGS
V
CC
= 2.7V
V
REF
= 2.5V
V
IN
= 0V
REF
+
= 2.5V
REF
–
= GND
IN
+
= 1.25V
IN
–
= 1.25V
F
O
= 460800Hz
T
A
= 25°C
GAUSSIAN
DISTRIBUTION
m = –109.8ppm
σ = 0.50ppm
OUTPUT CODE (ppm OF V
REF
)
–30
–25.5 –21 –16.5 –12
NUMBER OF READINGS (%)
2415 G15
10
8
6
4
2
0
10,000 CONSECUTIVE
READINGS
V
CC
= 2.7V
V
REF
= 2.5V
V
IN
= 0V
REF
+
= 2.5V
REF
–
= GND
IN
+
= 1.25V
IN
–
= 1.25V
F
O
= 1075200Hz
T
A
= 25°C
GAUSSIAN
DISTRIBUTION
m = –20.5ppm
σ = 1.90ppm
OUTPUT CODE (ppm OF V
REF
)
–103
–103.5 –104 –104.5 –105
NUMBER OF READINGS (%)
2415 G16
12
10
8
6
4
2
0
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
REF
+
= 5V
REF
–
= GND
IN
+
= 2.5V
IN
–
= 2.5V
F
O
= GND
T
A
= 25°C
GAUSSIAN
DISTRIBUTION
m = –103.9ppm
σ = 0.27ppm
TIME (HRS)
05
10 15 20 25 30 35 40 45 50 55 60
ADC READINGS (ppm OF V
REF
)
2415 G17
–101.0
–101.5
–102.0
–102.5
–103.0
–103.5
–104.0
–104.5
–105.0
–105.5
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
REF
+
= 5V
REF
–
= GND
IN
+
= 2.5V
IN
–
= 2.5V
F
O
= GND
T
A
= 25°C
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
)
2415 G18
0.5
0.4
0.3
0.2
0.1
0
V
CC
= 5V
V
REF
= 5V
V
INCM
= 2.5V
REF
+
= 5V
REF
–
= GND
F
O
= GND
T
A
= 25°C
Noise Histogram
(Output Rate = 15Hz,
V
CC
= 5V, V
REF
= 2.5V)
Noise Histogram
(Output Rate = 45Hz,
V
CC
= 5V, V
REF
= 2.5V)
Noise Histogram
(Output Rate = 105Hz,
V
CC
= 5V, V
REF
= 2.5V)
Noise Histogram
(Output Rate = 15Hz,
V
CC
= 2.7V, V
REF
= 2.5V)
Noise Histogram
(Output Rate = 45Hz,
V
CC
= 2.7V, V
REF
= 2.5V)
Noise Histogram
(Output Rate = 105Hz,
V
CC
= 2.7V, V
REF
= 2.5V)
Long-Term Histogram
(60Hrs)
Consecutive ADC Readings vs
Time
RMS Noise vs Input Differential
Voltage
TYPICAL PERFOR A CE CHARACTERISTICS
UW