LT1011/LT1011A - Voltage Comparator - Analog Devices

1 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 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 15 V/ C. Additionally, the supply current is lower by n 30V Differential Input Voltage a factor of two with no loss in speed.

2 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 Applications 5V supply. The lt1011 retains all the versatile features of 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.

3 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 10 s 12-Bit A/D Converter Response Time vs Overdrive R1 15V. 1k LM329 500. FULL-SCALE 7V *R2 AND R4. TRIM SHOULD TC TRACK 450. R2* R3 15V. 400. F. 15V 350. RESPONSE TIME (ns). INPUT. 0V TO 10V 5V 300. FALLING. 6012 250 OUTPUT. R4* R5. 12-BIT. 1k 200. D/A CONVERTER RISING. + 150 OUTPUT. R6. LT1011A 100. 820 . 50. PARALLEL PARALLEL. OUTPUTS OUTPUTS 0. 1 10 100. SERIAL OUTPUT. OVERDRIVE (mV). 7475 1011 TA02. D. AM2504 LATCH. 5V SAR REGISTER. CC. E S CP S. START CLOCK f = 1011 TA01. 1011afe For more information 1. LT1011/LT1011A . Absolute Maximum Ratings (Note 1).

4 Supply Voltage (Pin 8 to Pin 4)..36V Input Voltage (Note 2)..Equal to Supplies Output to Negative Supply (Pin 7 to Pin 4) Output Short-Circuit sec LT1011AC, Operating Temperature Range (Note 3). LT1011AI, LT1011AC, 0 C to 70 C. LT1011AM, LT1011M (OBSOLETE)..50V LT1011AI, 40 C to 85 C. Ground to Negative Supply (Pin 1 to Pin 4)..30V LT1011AM, LT1011M (OBSOLETE).. 55 C to 125 C. Differential Input 36V Storage Temperature 65 C to 150 C. Voltage at STROBE Pin (Pin 6 to Pin 8)..5V Lead Temperature (Soldering, 10 sec).. 300 C. Pin Configuration TOP VIEW. V+ TOP VIEW. 8. GND 1 7 OUTPUT GND 1 8 V+. BALANCE/ INPUT+ 2 7 OUTPUT. INPUT+ 2 + 6 +. STROBE BALANCE/. INPUT 3 6. STROBE. INPUT 3 5 BALANCE. V 4 5 BALANCE. 4. V N8 PACKAGE S8 PACKAGE. H PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO.

5 8-LEAD TO-5 METAL CAN. TJMAX = 150 C, JA = 130 C/W(N8). TJMAX = 150 C, JA = 150 C/W, JC = 45 C/W TJMAX = 150 C, JA = 150 C/W(S8). OBSOLETE PACKAGE. Consider the N8 or S8 Packages for Alternate Source 1011afe 2 For more information LT1011/LT1011A . Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE. lt1011 ACN8#PBF N/A lt1011 8-Lead Plastic DIP 0 C to 70 C. LT1011CN8#PBF N/A lt1011 8-Lead Plastic DIP 0 C to 70 C. lt1011 AIS8#PBF lt1011 AIS8#TRPBF 1011AI 8-Lead Plastic SO 40 C to 85 C. LT1011CS8#PBF LT1011CS8#TRPBF 1011 8-Lead Plastic SO 0 C to 70 C. LT1011IS8#PBF LT1011IS8#TRPBF 1011I 8-Lead Plastic SO 40 C to 85 C. OBSOLETE PACKAGES. lt1011 ACH#PBF N/A 8-Lead TO-5 Metal Can 55 C to 125 C. LT1011CH#PBF N/A 8-Lead TO-5 Metal Can 55 C to 125 C.

6 lt1011 AMH#PBF N/A 8-Lead TO-5 Metal Can 55 C to 125 C. LT1011MH#PBF N/A 8-Lead TO-5 Metal Can 55 C to 125 C. lt1011 ACJ8#PBF N/A 8-Lead CERDIP 55 C to 125 C. LT1011CJ8#PBF N/A 8-Lead CERDIP 55 C to 125 C. lt1011 AMJ8#PBF N/A 8-Lead CERDIP 55 C to 125 C. LT1011MJ8#PBF N/A 8-Lead CERDIP 55 C to 125 C. Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: For more information on tape and reel specifications, go to: 1011afe For more information 3. LT1011/LT1011A . Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C.

7 VS = 15V, VCM = 0V, RS = 0 , VGND = 15V, output at pin 7 unless otherwise noted. LT1011AC/AI/AM LT1011C/I/M. SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS. VOS Input Offset Voltage (Note 4) mV. 1 3 mV. *Input Offset Voltage RS 50k (Note 5) 2 mV. 3 mV. IOS *Input Offset Current (Note 5) 3 4 nA. 5 6 nA. IB Input Bias Current (Note 4) 15 25 20 50 nA. *Input Bias Current (Note 5) 20 35 25 65 nA. 50 80 nA. VOS Input Offset Voltage Drift TMIN T TMAX 4 15 4 25 V/ C. T (Note 6). AVOL *Large-Signal Voltage Gain RL = 1k Connected to 15V, 200 500 200 500 V/mV. 10V VOUT RL = 500 Connected to 5V, 50 300 50 300 V/mV. VS = Single 5V, VGND = 0V, VOUT CMRR Common Mode Rejection Ratio 94 115 90 115 dB. *Input Voltage Range (Note 9) VS = 15V 13 13 V. VS = Single 5V 3 3 V.

8 TD *Response Time (Note 7) 150 250 150 250 ns VOL *Output Saturation Voltage , VIN = 5mV, ISINK = 8mA, TJ 100 C V. VGND = 0 VIN = 5mV, ISINK = 8mA V. VIN = 5mV, ISINK = 50mA V. *Output Leakage Current VIN = 5mV, VGND = 15V, 10 10 nA. VOUT = 20V 500 500 nA. *Positive Supply Current VGND = 0 4 4 mA. *Negative Supply Current VGND = 0 mA. *Strobe Current (Note 8) Minimum to Ensure Output Transistor is Off, 500 500 A. VGND = 0. Input Capacitance 6 6 pF. *Indicates parameters which are guaranteed for all supply voltages, including a single 5V supply. See Note 5. Note 1: Stresses beyond those listed under Absolute Maximum Ratings defines a worst-case error band that includes effects due to common may cause permanent damage to the device. Exposure to any Absolute mode signals, Voltage gain and output load.

9 Maximum Rating condition for extended periods may affect device Note 6: Drift is calculated by dividing the offset Voltage difference reliability and lifetime. measured at min and max temperatures by the temperature difference. Note 2: Inputs may be clamped to supplies with diodes so that Note 7: Response time is measured with a 100mV step and 5mV. maximum input Voltage actually exceeds supply Voltage by one diode overdrive. The output load is a 500 resistor tied to 5V. Time drop. See Input Protection in the Applications Information section. measurement is taken when the output crosses Note 3: TJMAX = 150 C. Note 8: Do not short the STROBE pin to ground. It should be current Note 4: Output is sinking with VOUT = 0V. driven at 3mA to 5mA for the shortest strobe time.

10 Currents as low Note 5: These specifications apply for all supply voltages from a single as 500 A will strobe the LT1011A if speed is not important. External 5V to 15V, the entire input Voltage range, and for both high and low leakage on the STROBE pin in excess of A when the strobe is off . output states. The high state is ISINK = 100 A, VOUT = (V+ 1V) and can cause offset Voltage shifts. the low state is ISINK = 8mA, VOUT = Therefore, this specification Note 9: See graph Input Offset Voltage vs Common Mode Voltage .. 1011afe 4 For more information LT1011/LT1011A . Typical Performance Characteristics Input Bias Current Input Offset Current Worst-Case Offset Error 45 100. IB FLOWS OUT. 40 OF INPUTS EQUIVALENT OFFSET Voltage (mV). 35 LM311. (FOR COMPARISON).