Features: Pin Compatible with LM111 Series Devices
Guaranteed Max 0.5mV Input Offset Voltage
Guaranteed Max 25nA Input Bias Current
Guaranteed Max 3nA Input Offset Current
Guaranteed Max 250ns Response Time
Guaranteed Min 200,000 Voltage Gain
50mA Output Current Source or Sink
30V Differential Input Voltage
Fully Specified for Single 5V OperationApplicationSAR A/D Converters
Voltage-to-Frequency Converters
Precision RC Oscillator
Peak Detector
Motor Speed Control
Pulse Generator
Relay/Lamp DriverPinout
SpecificationsSupply Voltage (Pin 8 to Pin 4) .............................. 36V
Output to Negative Supply (Pin 7 to Pin 4)
LT1011AC, LT1011C .......................................... 40V
LT1011AI, LT1011I ............................................ 40V
LT1011AM, LT1011M ........................................ 50V
Ground to Negative Supply (Pin 1 to Pin 4)............ 30V
Differential Input Voltage...................................... 36V
Voltage at STROBE Pin (Pin 6 to Pin 8).................... 5V
Input Voltage (Note 2) ....................... Equal to Supplies
Output Short-Circuit Duration.............................. 10 sec
Operating Temperature Range (Note 3)
LT1011AC, LT1011C ............................... 0 C to 70 C
LT1011AI, LT1011I ........................... 40 C to 85 C
LT1011AM, LT1011M ..................... 55 C to 125 C
Storage Temperature Range.................65 C to 150 C
Lead Temperature (Soldering, 10 sec)..................300 C
DescriptionThe LT(R1011 is a general purpose comparator with significantly better input characteristics than the LM111. Although pin compatible with the LM111, it offers four times lower bias current, six times lower offset voltage and five times higher voltage gain. Offset voltage drift, a previously unspecified parameter, is guaranteed at 15m V/ C. Additionally, the supply current is lower by a factor of two with no loss in speed. The LT1011 is several times faster than the LM111 when subjected to large overdrive conditions. It is also fully specified for DC parameters and response time when operating on a single 5V supply. These parametric improvements allow the LT1011 to be used in high accuracy (+ 12-bit) systems without trimming. In a 12-bit A/D application, for instance,
using a 2mA DAC, the offset error introduced by the LT1011 is less than 0.5LSB. The LT1011 retains all the versatile features of the LM111, including single 3V to 18V supply operation, and a floating transistor output with 50mA source/sink capability. It can drive loads referenced to ground, negative supply or positive supply, and is specified up to 50V between V and the collector output. A differential input voltage up to the full supply voltage is allowed, even with 18V supplies, enabling the inputs to be clamped to the supplies with simple diode clamps.
LT1011A Data Sheet
