LTC2431 Linear Technology, LTC2431 Datasheet - Page 6

• Manufacturer Part Number: LTC2431
• Description: (LTC2430 / LTC2431) 20-Bit No Latency Delta-Sigma ADCs
• Manufacturer: Linear Technology

LTC2430/LTC2431
6
TYPICAL PERFOR A CE CHARACTERISTICS
–1
–2
–3
–4
–5
40
35
30
25
20
15
10
–3
–4
–5
–1
–2
5
4
3
2
1
0
5
0
5
4
3
2
1
0
–2.5
–2.5
–2.5
Total Unadjusted Error
(V
Integral Nonlinearity
(V
Noise Histogram (Output Rate =
7.5Hz, V
V
V
V
F
10,000 CONSECUTIVE
READINGS
V
V
V
V
F
T
V
V
V
F
O
O
O
CC
REF
INCM
CC
REF
IN
INCM
A
CC
REF
INCM
CC
CC
–2
–2
–2
= GND
= GND
= 25 C
= GND
= 0V
= 5V
= 5V
= 5V
= 5V
= 5V
= 5V, V
= 5V
= 5V, V
–1.5
–1.5
–1.5
= V
= 2.5V
= V
OUTPUT CODE (ppm OF V
INCM
INCM
CC
–1
–1
–1
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= 5V, V
= 2.5V
85 C
–0.5
REF
= 2.5V
– 0.5
REF
– 0.5
–45 C
25 C
= 5V)
= 5V)
0
0
0
25 C
REF
0.5 1
0.5
0.5 1
= 5V)
GAUSSIAN
DISTRIBUTION
m = – 0.25ppm
1
85 C
= 0.550ppm
REF
–45 C
W
1.5
1.5
1.5
)
24301 G04
24301 G07
24301 G01
2
2
2
U
2.5
2.5
2.5
–1
–2
–3
–4
–5
–1
–2
–3
–4
–5
20
18
16
14
12
10
–1.25
–1.25
5
4
3
2
1
0
5
4
3
2
1
0
8
6
4
2
0
–4
Total Unadjusted Error
(V
Integral Nonlinearity
(V
Noise Histogram (Output Rate =
7.5Hz, V
V
V
V
F
V
V
V
F
10,000 CONSECUTIVE
READINGS
V
V
V
V
F
T
O
O
CC
REF
INCM
CC
REF
INCM
O
A
CC
CC
CC
REF
IN
INCM
–1
–1
–3
= GND
= GND
= GND
= 25 C
= 5V
= 5V
= 0V
= 2.7V
= 2.5V
= 2.5V
= 5V, V
= 5V, V
–0.75
–0.75
= 2.5V
= V
= V
= 2.5V
–2
OUTPUT CODE (ppm OF V
INCM
INCM
CC
–0.5
–0.5
–1
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= 2.7V, V
= 1.25V
–0.25
= 1.25V
–0.25
REF
REF
0
85 C
= 2.5V)
= 2.5V)
0
0
1
–45 C
85 C
25 C
0.25 0.5
0.25 0.5
2
REF
–45 C
GAUSSIAN
DISTRIBUTION
m = –1.07ppm
3
= 1.06ppm
= 2.5V)
REF
0.75
0.75
25 C
4
)
24301 G02
24301 G05
24301 G08
1
1
5
1.25
1.25
6
–20
–20
–10
–15
–10
–15
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
20
15
10
–5
20
15
10
–5
–1.25
–1.25
5
0
0
5
0
–2.5
RMS Noise
vs Input Differential Voltage
Total Unadjusted Error
(V
Integral Nonlinearity
(V
V
V
V
F
V
V
V
F
V
V
V
F
T
O
O
CC
REF
INCM
O
A
CC
CC
REF
INCM
CC
REF
INCM
CC
–1
–2
–1
= GND
= GND
= GND
= 25 C
= 2.7V
= 2.7V
= 5V
INPUT DIFFERENTIAL VOLTAGE (V)
= 2.5V
= 2.5V
= 2.7V, V
= 5V
= 2.7V, V
–0.75
–0.75
–1.5
= V
= V
= 2.5V
INCM
INCM
–0.5
–0.5
–1
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= 1.25V
= 1.25V
–0.25
–0.25
– 0.5
REF
REF
0
0
0
= 2.5V)
= 2.5V)
25 C
0.25
0.25
25 C
0.5 1
–45 C
–45 C
85 C
0.5
0.5
0.75
0.75
1.5
85 C
24301 G06
24301 G10
24301 G03
1
2
1
24301f
1.25
1.25
2.5