LTC1052/LTC7652 Zero-Drift Operational Amplifier FEATURES DESCRIPTIO Guaranteed Max Offset: 5V The LTC 1052 and LTC7652 are low noise zero-drift op Guaranteed Max Offset Drift: 0.05V/C amps manufactured using Linear Technologys enhanced TM Typ Offset Drift: 0.01V/C LTCMOS silicon gate process. Chopper-stabilization Excellent Long Term Stability: 100nV/Month constantly corrects offset voltage errors. Both initial offset Guaranteed Max Input Bias Current: 30pA and changes in the offset due to time, temperature and Over Operating Temperature Range: common mode voltage are corrected. This, coupled with Guaranteed Min Gain: 120dB picoampere input currents, gives these amplifiers Guaranteed Min CMRR: 120dB unmatched performance. Guaranteed Min PSRR: 120dB Low frequency (1/f) noise is also improved by the Single Supply Operation: 4.75V to 16V chopping technique. Instead of increasing continuously (Input Voltage Range Extends to Ground) at a 3dB/octave rate, the internal chopping causes noise to External Capacitors can be Returned to V with No decrease at low frequencies. Noise Degradation The chopper circuitry is entirely internal and completely U transparent to the user. Only two external capacitors APPLICATIO S are required to alternately sample-and-hold the offset correction voltage and the amplified input signal. Control Thermocouple Amplifiers circuitry is brought out on the 14-pin and 16-pin versions Strain Gauge Amplifiers to allow the sampling of the LTC1052 to be synchronized Low Level Signal Processing with an external frequency source. Medical Instrumentation , LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corporation. Teflon is a trademark of DuPont. TYPICAL APPLICATIO Ultralow Noise, Low Drift Amplifier Noise Spectrum 5V 160 3 7 + 6 140 LTC1052 2 8 120 4 1 100 0.1F 0.1F 0.1F 5V 80 5V 60 68k 5V 100k 3K 1 1.5k 3 5V 40 7 + INPUT 8 OUTPUT LT 1007 20 6 2 100k 4 0 0 100 200 300 400 500 5V FREQUENCY (Hz) V OS = 3V 100 LTC1052/7652 TA02 V OS T = 50nV/C NOISE = 0.06V 0.1Hz TO 10Hz LTC1052/7652 TA01 P-P 1052fa 1 VOLTAGE NOISE DENSITY (nV/ Hz) U ULTC1052/LTC7652 ABSOLUTE AXI U RATI GS (Notes 1 and 2) + Total Supply Voltage (V to V ) ............................... 18V Operating Temperature Range + Input Voltage ........................ (V + 0.3V) to (V 0.3V) LTC1052C/LTC7652C ..........................40C to 85C Output Short Circuit Duration .......................... Indefinite LTC1052M (OBSOLETE).....................55C to 125C Storage Temperature Range .................. 55C to 150C Lead Temperature (Soldering, 10 sec).................. 300C UUW PACKAGE/ORDER I FOR ATIO TOP VIEW TOP VIEW C EXTB C EXTB 1 14 INT/EXT 8 C + EXTA 2 13 CLK IN C V /CASE EXTA 1 7 NC (GUARD) 3 12 CLK OUT IN 4 11 V+ OUTPUT IN 2 6 + 5 OUTPUT +IN 10 + 3 5 NC (GUARD) 6 9 OUTPUT CLAMP LTC1052 OUTPUT CLAMP +IN 4 LTC7652 C RETURN C V 7 8 RETURN V N PACKAGE, 14-LEAD CERDIP METAL CAN H PACKAGE T = 110C, = 130C/W JMAX JA J PACKAGE, 14-LEAD CERDIP OBSOLETE PACKAGE OBSOLETE PACKAGE Consider the N8 Package for Alternate Source Consider the N14 Package for Alternate Source ORDER PART NUMBER REPLACES ORDER PART NUMBER REPLACES LTC7652CH ICL7652CTV LTC1052CN ICL7652CPD ICL7652ITV ICL7650CPD ICL7650CTV-1 LTC1052CJ ICL7652IJD ICL7650ITV-1 ICL7650IJD LTC1052CH ICL7650CTV LTC1052MJ ICL7650MJD ICL7650ITV LTC1052MH ICL7650MTV TOP VIEW TOP VIEW C EXTB 1 16 INT/EXT C C EXTA EXTB 1 8 2 C 15 CLK IN EXTA + IN V 2 7 3 14 NC (GUARD) CLK OUT +N 3 6 + OUTPUT 4 13 V+ IN OUTPUT V 4 5 CLAMP 5 12 OUTPUT +IN 6 11 N8 PACKAGE OUTPUT CLAMP NC (GUARD) 8-LEAD PDIP C 7 10 RETURN V T = 110C, = 150C/W JMAX JA NC 8 9 NC J8 PACKAGE, 8-LEAD CERDIP SW PACKAGE 16-LEAD PLASTIC (WIDE) SO OBSOLETE PACKAGE T = 110C, = 150C/W Consider the N8 Package for Alternate Source JMAX JA ORDER PART NUMBER REPLACES ORDER PART NUMBER REPLACES LTC1052CN8 ICL7650CPA LTC1052CSW LTC1052CS LTC1052CJ8 ICL7650IJA LTC1052MJ8 Consult LTC Marketing for parts specified with wider operating temperature ranges. 1052fa 2 U WWW