Datasheet LTC1854, LTC1855, LTC1856 (Analog Devices) - 8

LTC1854/LTC1855/LTC1856
Typical perFormance characTerisTics LTC1856 Channel-to-Channel Gain LTC1855 Channel-to-Channel Gain LTC1854 Channel-to-Channel Gain Error Matching vs Temperature Error Matching vs Temperature Error Matching vs Temperature
1.0 0.5 0.25 0.20 0.15 0.5 0.25 0.10 0.05 0 0 0 –0.05 –0.10 CHANNEL-TO-CHANNEL –0.5 CHANNEL-TO-CHANNEL –0.25 ERROR MATCHING (LSB) GAIN ERROR MATCHING (LSBs) GAIN ERROR MATCHING (LSBs) CHANNEL-TO-CHANNEL GAIN –0.15 –0.20 –1.0 –0.5 –0.25 –50 –25 0 25 50 75 100 –50 –25 0 25 50 75 100 –50 –25 0 25 50 75 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 185456 G19 185456 G20 185456 G21
Internal Reference Voltage Change in REFCOMP Voltage LTC1856 Power Supply vs Temperature vs Load Current Feedthrough vs Ripple Frequency
2.520 0.04 –10 fSAMPLE = 100kHz 2.515 V –20 RIPPLE = 60mV 2.510 0.02 –30 2.505 –40 2.500 0 –50 2.495 –60 2.490 –0.02 INTERNAL REFERENCE VOLTAGE (V) 2.485 CHANGE IN REFCOMP VOLTAGE (V) POWER SUPPLY FEEDTHROUGH (dB) –70 2.480 –0.04 –80 –50 –25 0 25 50 75 100 –50 –40 –30 –20 –10 0 10 100 1k 10k 100k 1M TEMPERATURE (°C) LOAD CURRENT (mA) RIPPLE FREQUENCY (Hz) 185456 G22 185456 G23 185456 G24
Supply Current vs Supply Voltage Supply Current vs Temperature
9.0 9.0 fSAMPLE = 100kHz fSAMPLE = 100kHz 8.5 8.5 8.0 8.0 SUPPLY CURRENT (mA) 7.5 7.5 POSITIVE SUPPLY CURRENT (mA) 7.0 7.0 4.5 4.75 5 5.25 5.5 –50 –25 0 25 50 75 100 SUPPLY VOLTAGE (V) TEMPERATURE (°C) 185454 G25 185456 G26 185456fa 8 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Applications Information Package Description Typical Application Related Parts