
LTC2487
9
2487fd
INPUT VOLTAGE (V)
–3
INL
(ppm
OF
V
REF
)
–1
1
3
–2
0
2
–0.75
–0.25
0.25
0.75
2487 G28
1.25
–1.25
VCC = 5V
VREF = 2.5V
VIN(CM) = 1.25V
fO = GND
85°C
–45°C, 25°C
INPUT VOLTAGE (V)
–3
INL
(ppm
OF
V
REF
)
–1
1
3
–2
0
2
–0.75
–0.25
0.25
0.75
2487 G29
1.25
–1.25
VCC = 2.7V
VREF = 2.5V
VIN(CM) = 1.25V
fO = GND
85°C
–45°C, 25°C
OUTPUT READING (μV)
179
NUMBER
OF
READINGS
(%)
8
10
12
186.2
2487 G30
6
4
181.4
188.6
2
0
16
14
10,000 CONSECUTIVE
READINGS
VCC = 5V
VREF = 5V
VIN = 0V
TA = 25°C
GAIN = 128
RMS = 0.85μV
AVERAGE = 0.184μV
VREF (V)
0
RMS
NOISE
(μV)
0.6
0.8
1.0
4
2487 G31
0.4
0.2
0
1
2
3
5
VCC = 5V
VIN = 0V
VIN(CM) = GND
fO = GND
TA = 25°C
GAIN = 128
VIN(CM) (V)
–1
180
OFFSET
ERROR
(μV)
182
186
188
190
200
194
1
3
4
2487 G32
184
196
198
192
0
2
5
6
VCC = 5V
VREF = 5V
VIN = 0V
fO = GND
TA = 25°C
TEMPERATURE (°C)
–45
OFFSET
ERROR
(μV)
200
210
220
75
2487 G33
190
180
160
–15
15
45
–30
90
0
30
60
170
240
230
VCC = 5V
VREF = 5V
VIN = 0V
VIN(CM) = GND
fO = GND
VCC (V)
2
2.5
0
OFFSET
ERROR
(μV)
100
250
3
4
4.5
2487 G34
50
200
150
3.5
5
5.5
VREF = 2.5V
VIN = 0V
VIN(CM) = GND
fO = GND
TA = 25°C
VREF (V)
0
OFFSET
ERROR
(μV)
190
200
210
3
5
2487 G35
180
170
160
12
4
220
230
240
VCC = 5V
VIN = 0V
VIN(CM) = GND
fO = GND
TA = 25°C
TYPICAL PERFORMANCE CHARACTERISTICS
Integral Nonlinearity (2x Speed
Mode; VCC = 5V, VREF = 2.5V)
Integral Nonlinearity (2x Speed
Mode; VCC = 2.7V, VREF = 2.5V)
Noise Histogram
(2x Speed Mode)
RMS Noise vs VREF
(2x Speed Mode)
Offset Error vs VIN(CM)
(2x Speed Mode)
Offset Error vs Temperature
(2x Speed Mode)
Offset Error vs VCC
(2x Speed Mode)
Offset Error vs VREF
(2x Speed Mode)