Datasheet

LTC2978A
10
2978afa
For more information www.linear.com/LTC2978A
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)
–50
REFERENCE OUTPUT VOLTAGE (V)
40 55 70 85
1.2355
1.2350
1.2345
1.2340
1.2335
1.2330
1.2325
1.2320
1.2315
1.2310
2978a G01
–35 –20 –5 10 25
100
THREE TYPICAL PARTS
TEMPERATURE (°C)
–50
ERROR (°C)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
70
2978a G02
–20 10 40
100
55–35 –5 25 85
TEMPERATURE (°C)
–50
0
ERROR (%)
0.005
0.015
0.020
0.025
0.035
–35
25
55
2978a G03
0.010
0.030
10
85
100
–20
–5
40 70
ADC V
IN
= 1.8V
TEMPERATURE (°C)
–50
V
OS
(µV)
40 55 70 85
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
2978a G04
–35 –20 –5 10 25
100
VOLTAGE SENSE MODE
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
2978a 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
2978a G06
0.8 1.8 2.8 3.8 4.8
122µV/LSB
ADC Rejection
vs Frequency at V
IN
ADC Rejection
vs Frequency at V
IN
(Zoom)
ADC Rejection vs Frequency
at V
IN
(Current Sense Mode)
FREQUENCY (Hz)
–120
REJECTION (dB)
–80
–40
0
–100
–60
–20
12500 25000 37500 50000
2978a G07
62500
0
FREQUENCY (Hz)
0
–120
REJECTION (dB)
–100
–80
–60
–40
–20
0
3125 6250 9375
12500
2978a G08
FREQUENCY (Hz)
–120
REJECTION (dB)
–80
–40
0
–100
–60
–20
12500 25000 37500 50000
2978a G09
62500
0