LTC2430_15 Datasheet, PDF (28/40 Pages) Linear Technology – 20-Bit No Latency ADCs with Differential Input and Differential Reference

LTC2430/LTC2431
APPLICATIO S I FOR ATIO
10
V_INCM = V_REFCM
9 V_CC = V_REF = 5V
8
V_IN = 0V
F_O = EXT OSC
7
6
5
4
T_A = 85°C
3
2
T_A = 25°C
1
0
0 10 20 30 40 50 60 70 80 90 100
OUTPUT DATA RATE (READINGS/SEC)
2431 F20
Figure 20. Offset Error vs Output Data Rate and Temperature
30 _{VINCM = VREFCM}
25
V_CC = V_REF = 5V
F_O = EXT OSC
20
15
10
5
T_A = 25°C
0
T_A = 85°C
–5
0 10 20 30 40 50 60 70 80 90 100
OUTPUT DATA RATE (READINGS/SEC)
2431 F22
Figure 22. – FS Error vs Output Data Rate and Temperature
22
21
20
T_A = 25°C
19
T_A = 85°C
18
17 VINCM = VREFCM
V_CC = V_REF = 5V
16 _RF^O_EF=–^E=XTGNODSC
RES = LOG₂(V_REF/INL_MAX)
15
0 10 20 30 40 50 60 70 80 90 100
OUTPUT DATA RATE (READINGS/SEC)
2430 F24
Figure 24. Resolution (INL_RMS ≤ 1LSB)
vs Output Data Rate and Temperature
28
5
T_A = 25°C
0
T_A = 85°C
–5
–10
–15
–20
–25
V_INCM = V_REFCM
V_CC = V_REF = 5V
F_O = EXT OSC
–30
0 10 20 30 40 50 60 70 80 90 100
OUTPUT DATA RATE (READINGS/SEC)
2431 F21
Figure 21. + FS Error vs Output Data Rate and Temperature
22
21
T_A = 25°C
T_A = 85°C
20
19
18
V_INCM = V_REFCM
17 ^{VCC = VREF = 5V}
V_IN = 0V
16 ^FRO_EF=–^E=XTGNODSC
RES = LOG₂ (V_REF/NOISE_RMS)
15
0 10 20 30 40 50 60 70 80 90 100
OUTPUT DATA RATE (READINGS/SEC)
2431 F23
Figure 23. Resolution (Noise_RMS ≤ 1LSB)
vs Output Data Rate and Temperature
5
V_INCM = V_REFCM
4
3
VR_IENF=–
0V
= GND
F_O = EXT OSC
2 ^TA ^{= 25°C}
1
V_CC = V_REF = 5V
0
V_CC = 2.7V
–1
V_REF = 2.5V
–2
–3
–4
–5
0 10 20 30 40 50 60 70 80 90 100
OUTPUT DATA RATE (READINGS/SEC)
2431 F25
Figure 25. Offset Error vs Output
Data Rate and V_CC
24301f