Datasheet

8
LTC1854/LTC1855/LTC1856
185456fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC1856 Power Supply
Feedthrough vs Ripple Frequency
Supply Current vs Supply Voltage Supply Current vs Temperature
TEMPERATURE (°C)
–50
–1.0
CHANNEL-TO-CHANNEL
GAIN ERROR MATCHING (LSBs)
–0.5
0
0.5
1.0
–25 0 25 50
185456 G19
75 100
LTC1854 Channel-to-Channel Gain
Error Matching vs Temperature
LTC1855 Channel-to-Channel Gain
Error Matching vs Temperature
LTC1856 Channel-to-Channel Gain
Error Matching vs Temperature
Change in REFCOMP Voltage
vs Load Current
Internal Reference Voltage
vs Temperature
TEMPERATURE (°C)
–50
–0.5
CHANNEL-TO-CHANNEL
GAIN ERROR MATCHING (LSBs)
–0.25
0
0.25
0.5
–25 0 25 50
185456 G20
75 100
TEMPERATURE (°C)
–50
INTERNAL REFERENCE VOLTAGE (V)
25
75
185456 G22
–25 0 50
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
100
LOAD CURRENT (mA)
–50
–0.04
CHANGE IN REFCOMP VOLTAGE (V)
–0.02
0
0.02
0.04
–40 –30 –20 –10
185456 G23
010
RIPPLE FREQUENCY (Hz)
–60
POWER SUPPLY FEEDTHROUGH (dB)
–40
–20
–10
100 10k 100k 1M
185456 G24
–80
1k
–30
–50
–70
f
SAMPLE
= 100kHz
V
RIPPLE
= 60mV
SUPPLY VOLTAGE (V)
4.5
SUPPLY CURRENT (mA)
8.0
8.5
5.5
185454 G25
7.5
7.0
4.75
5
5.25
9.0
f
SAMPLE
= 100kHz
TEMPERATURE (°C)
–50
7.0
POSITIVE SUPPLY CURRENT (mA)
7.5
8.0
8.5
9.0
–25 0 25 50
185456 G26
75 100
f
SAMPLE
= 100kHz
TEMPERATURE (°C)
–50
–0.25
CHANNEL-TO-CHANNEL GAIN
ERROR MATCHING (LSB)
–0.15
–0.05
0.05
–25
0
25 50
185456 G21
75
0.15
0.25
–0.20
–0.10
0
0.10
0.20
100