LTC1250 Linear Technology, LTC1250 Datasheet
LTC1250
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LTC1250 Summary of contents
Page 1
... The internal nulling clock is set at 5kHz for optimum low frequency noise and offset drift; no external connections are necessary. The LTC1250 is available in standard 8-pin ceramic and plastic DIPs, as well as an 8-pin SOIC package. 5V 1000pF 18 ...
Page 2
... Total Supply Voltage ( ............................. 18V + Input Voltage ........................ (V + 0.3V Output Short Circuit Duration ......................... Indefinite Operating Temperature Range LTC1250M..................................... – 125 C LTC1250C .......................................... Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec.)................ 300 C ELECTRICAL C HARA TERISTICS C SYMBOL PARAMETER V Input Offset Voltage ...
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... 100k filter at 0.1Hz. The LTC1250 is sample tested for noise; for 100% tested parts contact LTC Marketing Dept. Note these parameters are guaranteed by design and not tested HARA TERISTICS C Supply Current vs Supply Voltage 4 25° ...
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... Resistance, Single Supply 16V 10V LOAD RESISTANCE (k ) LTC1250 G08 75 100 125 LTC1250 G14 V = ± RMS 10k 100k LTC1250 G12 – GND R TO GND LTC1250 G09 ...
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... PPLICATI FOR ATIO Input Noise The LTC1250, like all CMOS amplifiers, exhibits two types of low frequency noise: thermal noise and 1/f noise. The LTC1250 uses several design modifications to minimize these noise sources. Thermal noise is minimized by rais- ing the g of the front-end transistors by running them at M high bias levels and using large transistor geometries ...
Page 6
... This ensures adequate gain at 7kHz for the LTC1250 to properly null. High value feedback resistors (above 1M) may require experimenta- tion to find the correct value because parasitics, both in the LTC1250 and on the PC board, play an increasing role ...
Page 7
... W U the previous page). Applications which require spike-free output in addition to minimum noise will need a low-pass filter after the LTC1250; a simple RC will usually do the job (Figure 4). The LTC1051/LTC1053 data sheet includes more information about zero-drift amplifier sampling behavior. 100k), the L Figure 4 ...
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... TYP 0.050 0.014 – 0.019 (0.355 – 0.483) (1.270) BSC : 499-3977 100pF 0. 10k 0. – 6 LTC1250 7.5k 10k 1% –5V 0. 500 100pF 0.1% FULL-SCALE TRIM ...