LT1678/LT1679 Dual/Quad Low Noise, Rail-to-Rail, Precision Op Amps FEATURES DESCRIPTIO Rail-to-Rail Input and Output The LT 1678/LT1679 are dual/quad rail-to-rail op amps 100% Tested Low Voltage Noise: offering both low noise and precision: 3.9nV/Hz wideband 3.9nV/Hz Typ at 1kHz noise, 1/f corner frequency of 4Hz and 90nV peak-to-peak 5.5nV/Hz Max at 1kHz 0.1Hz to 10Hz noise are combined with outstanding Single Supply Operation from 2.7V to 36V precision: 100V maximum offset voltage, greater than Offset Voltage: 100V Max 100dB common mode and power supply rejection and Low Input Bias Current: 20nA Max 20MHz gain bandwidth product. The LT1678/LT1679 bring High A : 3V/V Min, R = 10k precision as well as low noise to single supply applications as VOL L High CMRR: 100dB Min low as 3V. The input range exceeds the power supply by High PSRR: 106dB Min 100mV with no phase inversion while the output can swing Gain Bandwidth Product: 20MHz to within 170mV of either rail. Operating Temperature Range: 40C to 85C The LT1678/LT1679 are offered in the SO-8 and SO-14 Matching Specifications packages. A full set of matching specifications are also No Phase Inversion provided, facilitating their use in matching dependent appli- 8-Lead SO and 14-Lead SO Packages cations such as a two op amp instrumentation amplifier U design. The LT1678/LT1679 are specified for supply volt- APPLICATIO S ages of 15V, single 5V as well as single 3V. For a single Strain Gauge Amplifiers amplifier with similiar performance, see the LT1677 data Portable Microphones sheet. Battery-Powered Rail-to-Rail Instrumentation , LTC and LT are registered trademarks of Linear Technology Corporation. Low Noise Signal Processing Microvolt Accuracy Threshold Detection Infrared Detectors TYPICAL APPLICATIO Instrumentation Amplifier with Shield Driver 3 0.1Hz to 10Hz Voltage Noise + 1k 30k 1 1/4 V = 2.5V LT1679 S 2 R F 15V 3.4k 5 4 GUARD + R G 7 1/4 100 OUTPUT 10 LT1679 6 + 8 1/4 11 R G 30k INPUT LT1679 100 9 15V GUARD GAIN = 1000 02 468 10 R 13 F 3.4k TIME (sec) 14 1/4 16789 TA01 16789 TA01b LT1679 1k 12 + sn16789 16789fs 1 VOLTAGE NOISE (50nV/DIV) + U ULT1678/LT1679 ABSOLUTE AXI U RATI GS (Note 1) Lead Temperature (Soldering, 10 sec.)................. 300C Supply Voltage ...................................................... 18V Operating Temperature Range Input Voltages (Note 2) ............ 0.3V Beyond Either Rail (Note 4)............................................. 40C to 85C Differential Input Current (Note 2) ..................... 25mA Specified Temperature Range Output Short-Circuit Duration (Note 3) ............ Indefinite (Note 5)............................................. 40C to 85C Storage Temperature Range ................. 65C to 150C UUW PACKAGE/ORDER I FOR ATIO ORDER PART ORDER PART TOP VIEW NUMBER NUMBER TOP VIEW OUT A 1 14 OUT D + IN A 2 13 IN D OUT A 1 8 V LT1678CS8 AD LT1679CS +IN A 3 12 +IN D 2 7 IN A OUT B LT1678IS8 LT1679IS A + V 4 11 V +IN A 3 6 IN B B +IN B 5 10 +IN C B C V 4 5 +IN B IN B 6 9 IN C S8 PART MARKING S8 PACKAGE OUT B 7 8 OUT C 8-LEAD PLASTIC SO 1678 T = 150C, = 190C/ W S PACKAGE JMAX JA 14-LEAD PLASTIC SO 1678I T = 150C, = 160C/ W JMAX JA Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = 3V, V = V = 1.7V V = 5V, V = V = 2.5V unless A S CM O S CM O otherwise noted. SYMBOL PARAMETER CONDITIONS (Note 6) MIN TYP MAX UNITS V Input Offset Voltage (Note 11) 35 100 V OS 0C T 70C 55 270 V A 40C T 85C 75 350 V A V =5V, V = V + 0.1V 150 550 V S CM S =5V, V = V 0.3V, 0C T 70C 180 750 V V S CM S A V =5V, V = V 0.3V, 40C T 85C 200 1000 V S CM S A V =5V, V = 0.1V 1.5 30 mV S CM V =5V, V = 0V, 0C T 70C 1.8 45 mV S CM A V =5V, V = 0V, 40C T 85C 2.0 50 mV S CM A V Average Input Offset Drift (Note 10) 0.40 3 V/C OS Temp I Input Bias Current (Note 11) 2 20 nA B 0C T 70C 3 35 nA A 40C T 85C 7 50 nA A V = 5V, V = V + 0.1V 0.19 0.40 A S CM S V = 5V, V = V 0.3V, 0C T 70C 0.19 0.60 A S CM S A V = 5V, V = V 0.3V, 40C T 85C 0.25 0.75 A S CM S A V = 5V, V = 0.1V 5 0.41 A S CM V = 5V, V = 0V, 0C T 70C 8.4 0.45 A S CM A V = 5V, V = 0V, 40C T 85C 10 0.47 A S CM A sn16789 16789fs 2 U WWW