Datasheet LT1011, LT1011A (Analog Devices)

LT1011/LT1011A Voltage Comparator
FeaTures DescripTion
n Pin Compatible with LM111 Series Devices The LT®1011 is a general purpose comparator with sig- n Guaranteed Max 0.5mV Input Offset Voltage nificantly better input characteristics than the LM111. n Guaranteed Max 25nA Input Bias Current Although pin compatible with the LM111, it offers four n Guaranteed Max 3nA Input Offset Current times lower bias current, six times lower offset voltage n Guaranteed Max 250ns Response Time and five times higher voltage gain. Offset voltage drift, n Guaranteed Min 200,000 Voltage Gain a previously unspecified parameter, is guaranteed at n 50mA Output Current Source or Sink 15µV/°C. Additionally, the supply current is lower by n ±30V Differential Input Voltage a factor of two with no loss in speed. The LT1011 is n Fully Specified for Single 5V Operation several times faster than the LM111 when subjected to n Available in 8-Lead PDIP and SO Packages large overdrive conditions. It is also fully specified for DC parameters and response time when operating on a single 5V supply. The LT1011 retains all the versatile features of
applicaTions
the LM111, including single 3V to ±18V supply operation, n SAR A/D Converters and a floating transistor output with 50mA source/sink n Voltage-to-Frequency Converters capability. It can drive loads referenced to ground, nega- n Precision RC Oscillator tive supply or positive supply, and is specified up to 50V n Peak Detector between V– and the collector output. A differential input n Motor Speed Control voltage up to the full supply voltage is allowed, even with n Pulse Generator ±18V supplies, enabling the inputs to be clamped to the n Relay/Lamp Driver supplies with simple diode clamps. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion 10µs 12-Bit A/D Converter
3.9k
Response Time vs Overdrive
R1 15V 1k LM329 500 FULL-SCALE 7V *R2 AND R4 TRIM 450 SHOULD TC TRACK R2* R3 –15V 400 6.49k 6.98k 0.001µF 15V 350 INPUT 300 0V TO 10V 5V FALLING 250 6012 OUTPUT R4* R5 12-BIT 2.49k 1k 200 D/A CONVERTER RISING + RESPONSE TIME (ns) 150 OUTPUT R6 LT1011A 100 820Ω – 50 PARALLEL PARALLEL OUTPUTS OUTPUTS 00.1 1 10 100 SERIAL OUTPUT OVERDRIVE (mV) 1011 TA02 7475 AM2504 D LATCH 5V SAR REGISTER CC E S CP S START CLOCK f = 1.4MHz 1011 TA01 1011afe For more information www.linear.com/LT1011 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Applications Information Typical Applications Schematic Diagram Package Description Revision History Typical Application Related Parts