Datasheet LT1637 (Analog Devices)

LT1637 1.1MHz, 0.4V/µs Over-The-Top Micropower, Rail-To-Rail Input and Output Op Amp
U FEATURES DESCRIPTIO
■
Operates with Inputs Above V +
The LT®1637 is a rugged op amp that operates on all single ■
Rail-to-Rail Input and Output
and split supplies with a total voltage of 2.7V to 44V. The ■
Micropower: 250
µ
A Supply Current Max
LT1637 has a gain-bandwidth product of 1.1MHz while ■
Operating Temperature Range: – 55
°
C to 125
°
C
drawing less than 250µA of quiescent current. The LT1637 ■ Gain-Bandwidth Product: 1.1MHz can be shut down, making the output high impedance and ■ Slew Rate: 0.4V/µs reducing the quiescent current to only 3µA. The LT1637 is ■ Low Input Offset Voltage: 350µV Max reverse supply protected: it draws virtually no current for re- ■ Single Supply Input Range: – 0.4V to 44V verse supply up to 25V. The input range of the LT1637 in- ■ High Output Current: 25mA Min cludes both supplies and the output swings to both supplies. ■ Specified on 3V, 5V and ±15V Supplies Unlike most micropower op amps, the LT1637 can drive ■ Output Shutdown heavy loads; its rail-to-rail output drives 25mA. The LT1637 ■ Output Drives 4700pF with Output Compensation is unity-gain stable into all capacitive loads up to 4700pF ■ Reverse Battery Protection to 25V when optional 0.22µF and 150Ω compensation is used. ■ High Voltage Gain: 800V/mV The LT1637 has a unique input stage that operates and ■ High CMRR: 110dB remains high impedance when above the positive supply. ■ Available in 8-Lead MSOP, PDIP and SO Packages; The inputs take 44V both differential and common mode, and a Tiny (3mm × 3mm × 0.8mm) DFN Package even when operating on a 3V supply. Built-in resistors
U
protect the inputs for faults below the negative supply up
APPLICATIO S
to 22V. There is no phase reversal of the output for inputs ■ Battery or Solar Powered Systems: 5V below VEE or 44V above VEE, independent of VCC. Portable Instrumentation The LT1637 op amp is available in the 8-pin MSOP, PDIP Sensor Conditioning and SO packages. For space limited applications, the ■ Supply Current Sensing LT1637 is available in a 3mm × 3mm × 0.8mm dual fine ■ Battery Monitoring pitch leadless package (DFN). ■ MUX Amplifiers ■ 4mA to 25mA Transmitters , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Over-The-Top is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
U TYPICAL APPLICATIO Over-The-Top® Current Source with Shutdown Current Source Timing Switchable Precision Current Source
6V 4V TO 44V + 4V V 4.7µF LT1004-1.2 SHDN 2V 2k R R* 0V + LT1637 TP0610 10mA – 1.2 IOUT = IOUT 5mA R IOUT e.g., 10mA = 120Ω 0mA SHDN *OPTIONAL FOR LOW OUTPUT CURRENTS, 1637 TA01 R* = R 100µs/DIV 1637 TA01b 1637fd 1