LTC2488_15 Datasheet, PDF (6/30 Pages) Linear Technology – 16-Bit 2-/4-Channel ADC with Easy Drive Input Current Cancellation

LTC2488
TYPICAL PERFORMANCE CHARACTERISTICS
Integral Nonlinearity
(V_CC = 5V, V_REF = 5V)
3
V_CC = 5V
V_REF = 5V
2 V_IN(CM) = 2.5V
F_O = GND
1 –45°C
25°C
0
85°C
–1
–2
–3
–2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 2.5
INPUT VOLTAGE (V)
2488 G01
Total Unadjusted Error
(V_CC = 5V, V_REF = 5V)
12
V_CC = 5V
V_REF = 5V
8 V_IN(CM) = 2.5V
F_O = GND
85°C
25°C
4
0
–45°C
–4
–8
–12
–2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 2.5
INPUT VOLTAGE (V)
2488 G04
Integral Nonlinearity
(V_CC = 5V, V_REF = 2.5V)
3
V_CC = 5V
V_REF = 2.5V
2 V_IN(CM) = 1.25V
F_O = GND
1
–45°C, 25°C, 85°C
0
–1
–2
–3
–1.25
–0.75 –0.25 0.25 0.75 1.25
INPUT VOLTAGE (V)
2488 G02
Total Unadjusted Error
(V_CC = 5V, V_REF = 2.5V)
12
V_CC = 5V
V_REF = 2.5V
8 V_IN(CM) = 1.25V
F_O = GND
85°C
25°C
4
0
–45°C
–4
–8
–12
–1.25
–0.75 –0.25 0.25 0.75 1.25
INPUT VOLTAGE (V)
2488 G05
Integral Nonlinearity
(V_CC = 2.7V, V_REF = 2.5V)
3
V_CC = 2.7V
V_REF = 2.5V
2 V_IN(CM) = 1.25V
F_O = GND
1
–45°C, 25°C, 85°C
0
–1
–2
–3
–1.25
–0.75 –0.25 0.25 0.75 1.25
INPUT VOLTAGE (V)
2488 G03
Total Unadjusted Error
(V_CC = 2.7V, V_REF = 2.5V)
12
V_CC = 2.7V
V_REF = 2.5V
8 V_IN(CM) = 1.25V
F_O = GND
4
85°C
25°C
0
–45°C
–4
–8
–12
–1.25
–0.75 –0.25 0.25 0.75 1.25
INPUT VOLTAGE (V)
2488 G06
Offset Error vs V_IN(CM)
0.3
V_CC = 5V
V_REF = 5V
0.2 V_IN = 0V
T_A = 25°C
0.1
0
–0.1
–0.2
–0.3
–1 0
1 23 4
V_IN(CM) (V)
56
2488 G07
6
Offset Error vs Temperature
0.3
V_CC = 5V
0.2
V_REF = 5V
V_IN = 0V
F_O = GND
0.1
0
–0.1
–0.2
–0.3
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
2488 G08
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Offset Error vs V_CC
0.3 _{REF+ = 2.5V}
REF^– = GND
0.2 V_IN = 0V
V_IN(CM) = GND
0.1 ^{TA = 25°C}
0
–0.1
–0.2
–0.3
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_CC (V)
2488 G09
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