Datasheet LT1006 (Analog Devices) - 10

LT1006
U U W U APPLICATIO S I FOR ATIO
In automated production testing the output is forced to
Low Supply Operation
1.4V by the test loop; offset voltage is measured with a The minimum guaranteed supply voltage for proper common mode voltage of zero and the negative supply at operation of the LT1006 is 2.7V. Typical supply current at zero (Pin 4). Without the test loop, these exact conditions this voltage is 320µA; therefore, power dissipation is only cannot be achieved. The test circuit shown ensures that 860µW. the output will never saturate even with worst-case offset voltages (– 250µV over the – 55°C to 125°C range). The
Noise Testing
effective common mode input is 0.3V with respect to the negative supply. As indicated by the common mode rejec- For application information on noise testing and tion specifications the difference is only a few microvolts calculations, please see the LT1007 or LT1028 data sheet. between the two methods of offset voltage measurement.
Supply Current Programming
Connecting an optional external resistor to Pin 8 changes
Test Circuit for Offset Voltage and
the biasing of the LT1006 in order to increase its speed or
Offset Drift with Temperature
to decrease its power consumption. If a higher slew rate is 50k* required, connect the external resistor for Pin 8 to Pin 4 [see performance curves for Increasing Slew Rate 4.7V (RSET to V–)]. For lower power consumption, inject a – current into Pin 8 (which is approximately 60mV above 100 LT1006 V Ω 0 V–) as shown on the Reducing Power Dissipation plot. + This can be accomplished by connecting RSET to the 50k* positive supply, or to save additional power, by obtaining – 0.3V the injected current from a low voltage battery. *RESISTORS MUST HAVE LOW THERMOELECTRIC POTENTIAL.
Comparator Applications
**THIS CIRCUIT IS ALSO USED AS THE BURN-IN CONFIGURATION, WITH SUPPLY VOLTAGES The single supply operation of the LT1006 and its ability to INCREASED TO ± 20V V swing close to ground while sinking current lends itself O = 1000VOS LT1006 • TA04 to use as a precision comparator with TTL compatible output.
Comparator Rise Response Time Comparator Fall Response Time to 10mV, 5mV, 2mV Overdrives to 10mV, 5mV, 2mV Overdrives
4 4 OUTPUT (V) 2 OUTPUT (V) 2 0 0 0 0 INPUT (mV) INPUT (mV) –100 –100 0 VS = 5V, 0V 50µs/DIV 1006 TA12a VS = 5V, 0V 50µs/DIV 1006 TA12b 1006fa 10