Datasheet

LTC2977
10
2977fa
For more information www.linear.com/LTC2977
TYPICAL PERFORMANCE CHARACTERISTICS
Reference Voltage vs Temperature
Temperature Sensor Error
vs Temperature
ADC Total Unadjusted Error
vs Temperature
ADC Zero Code Center Offset
Voltage vs Temperature ADC-INL ADC-DNL
TEMPERATURE (°C)
REFERENCE OUTPUT VOLTAGE (V)
1.2325
1.2320
1.2315
1.2310
1.2305
1.2300
1.2295
1.2290
1.2285
2977 G01
THREE TYPICAL PARTS
–50 50
10
90
110
–30
–10
30 70
TEMPERATURE (°C)
ERROR (°C)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2977 G02
–50 50
10
90
110
–30
–10
30 70
TEMPERATURE (°C)
–50
–0.25
ERROR (%)
–0.05
–0.10
–0.15
–0.20
0.05
0.10
0.15
0.25
50
2977 G03
0
0.20
10
90
110
–30
–10
30 70
V
SENSEP0
= 1.8V
THREE TYPICAL PARTS
TEMPERATURE (°C)
OFFSET (µV)
250
200
150
100
50
0
–50
–100
–150
–200
–250
2977 G04
VOLTAGE SENSE MODE
THREE TYPICAL PARTS
–50 50
10
90
110
–30
–10
30 70
INPUT VOLTAGE (V)
–0.2
ERROR (LSBs)
5.8
3.0
2.5
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
2977 G05
0.8 1.8 2.8 3.8 4.8
122µV/LSB
INPUT VOLTAGE (V)
–0.2
ERROR (LSBs)
5.8
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
2977 G06
0.8 1.8 2.8 3.8 4.8
122µV/LSB
ADC Noise Histogram
Voltage Supervisor Total
Unadjusted Error vs Temperature
Input Sampling Current
vs Differential Input Voltage
READ_V
OUT
(µV)
–20
0
NUMBER OF READINGS
200
400
600
800
1000
1200
–10 0 10
20
2977 G07
V
IN
= 0V
HIGH RESOLUTION MODE
TEMPERATURE (°C)
SUPERVISOR ERROR (%)
2977 G08
–50
–1.0
–0.2
–0.4
–0.6
–0.8
0.2
0
0.4
0.6
1.0
50
0.8
10
90
110
–30
–10
30 70
V
SENSEP0
= 1.5V
HIGH RESOLUTION MODE
THREE TYPICAL PARTS
INPUT VOLTAGE (V)
0
0
INPUT SAMPLING CURRENT (µA)
1
3
4
5
4
9
2977 G09
2
2
1
5
3
6
6
7
8