LT1638/LT1639 1.2MHz, 0.4V/s Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps FEATURES DESCRIPTION + n Operates with Inputs Above V The LT 1638 is a low p wer dual rail-to-rail input and output n Rail-to-Rail Input and Output operational ampli er available in the standard 8-pin PDIP n Low Power: 230A per Ampli er Max and SO packages as well as the 8-lead MSOP package. The n Gain Bandwidth Product: 1.2MHz LT1639 is a low power quad rail-to-rail input and output n Slew Rate: 0.4V/s operational ampli er offered in the standard 14-pin PDIP n and surface mount packages. For space limited applications High Output Current: 25mA Min n the LT1638 is available in a 3mm x 3mm x 0.8mm dual Speci ed on 3V, 5V and 15V Supplies n ne pitch leadless package (DFN). Reverse Battery Protection to 18V n No Supply Sequencing Problems The LT1638/LT1639 op amps operate on all single and split n High Voltage Gain: 1500V/mV supplies with a total voltage of 2.5V to 44V drawing only n Single Supply Input Range: 0.4V to 44V 170A of quiescent current per ampli er. These ampli- n High CMRR: 98dB ers are reverse battery protected and draw no current n No Phase Reversal for reverse supply up to 18V. n Available in 14-Lead SO, 8-Lead MSOP and DFN The input range of the LT1638/LT1639 includes both sup- Packages plies, and a unique feature of this device is its capability to operate over the top with either or both of its inputs + APPLICATIONS above V . The inputs handle 44V, both differential and common mode, independent of supply voltage. The input n Battery- or Solar-Powered Systems stage incorporates phase reversal protection to prevent Portable Instrumentation false outputs from occurring when the inputs are below Sensor Conditioning the negative supply. Protective resistors are included in n Supply Current Sensing the input leads so that current does not become excessive n Battery Monitoring when the inputs are forced below the negative supply. n Micropower Active Filters The LT1638/LT1639 can drive loads up to 25mA and still n 4mA to 20mA Transmitters maintain rail-to-rail capability. The op amps are unity-gain L, LT, LTC, LTM, Over-The-Top, Linear Technology and the Linear logo are registered stable and drive all capacitive loads up to 1000pF when trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. optional output compensation is used. Output Voltage vs Input Voltage TYPICAL APPLICATION Over-The-Top Comparator with 100mV Hysteresis Centered at 0mV 5V V 10k CC 1M V1 V CC V 1M CC + + A B V0 1/2 LT1638 1/2 LT1638 1M 0V 10k 1M 1638/39 TA01 V2 1638/39 TA02 V = 5V, V = 0V TO 44V, t = 27s 20mV/DIV CC CM PD 16389fg 1LT1638/LT1639 (Note 1) ABSOLUTE MAXIMUM RATINGS + Total Supply Voltage (V to V ) ................................44V Speci ed Temperature Range (Note 4) Input Differential Voltage...........................................44V LT1638C/LT1639C ................................40C to 85C Input Current ........................................................25mA LT1638I/LT1639I ..................................40C to 85C Output Short-Circuit Duration (Note 2) .........Continuous LT1638H/LT1639H .............................40C to 125C Operating Temperature Range (Note 3) Junction Temperature .......................................... 150C LT1638C/LT1639C ................................40C to 85C DD Package ......................................................125C LT1638I/LT1639I ..................................40C to 85C Storage Temperature Range ...................65C to 150C LT1638H/LT1639H .............................40C to 125C DD Package .......................................65C to 125C Lead Temperature (Soldering, 10 sec) .................. 300C PIN CONFIGURATION TOP VIEW + TOP VIEW OUT A 1 8 V OUT A 1 8 V+ 7 IN A 2 OUT B IN A 2 7 OUT B A A 3 6 6 IN B +IN A IN B +IN A 3 B B V 4 5 +IN B V 4 5 +IN B MS8 PACKAGE 8-LEAD PLASTIC MSOP N8 PACKAGE S8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO T = 150C, = 273C/W JMAX JA T = 150C, = 150C/W (N8) JMAX JA T = 150C, = 190C/W (S8) JMAX JA TOP VIEW OUT A 1 14 OUT D TOP VIEW IN A 2 13 IN D A D + OUT A 1 8 V +IN A 3 12 +IN D IN A 2 7 OUT B + 11 V 4 V A +IN A 3 6 IN B 10 +IN B 5 +IN C B C V 4 5 +IN B B 6 9 IN B IN C 7 8 OUT B OUT C DD PACKAGE 8-LEAD (3mm s 3mm) PLASTIC DFN N PACKAGE S PACKAGE T = 125C, = 43C/W JMAX JA 14-LEAD PDIP 14-LEAD PLASTIC SO UNDERSIDE METAL INTERNALLY CONNECTED TO V T = 150C, = 130C/W (N) JMAX JA T = 150C, = 160C/W (S) JMAX JA 16389fg 2