Datasheet LTC1052, LTC7652 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | Zero-Drift Operational Amplifier |
| Páginas / Página | 24 / 1 — FEATURES. DESCRIPTIO. APPLICATIO S. TYPICAL APPLICATIO. Ultralow Noise, … |
| Formato / tamaño de archivo | PDF / 871 Kb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTIO. APPLICATIO S. TYPICAL APPLICATIO. Ultralow Noise, Low Drift Amplifier. Noise Spectrum
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LTC1052/LTC7652 Zero-Drift Operational Amplifier
U FEATURES DESCRIPTIO
■ Guaranteed Max Offset: 5µV The LTC®1052 and LTC7652 are low noise zero-drift op ■ Guaranteed Max Offset Drift: 0.05µV/°C amps manufactured using Linear Technology’s enhanced ■ Typ Offset Drift: 0.01µV/°C LTCMOSTM 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.
U TYPICAL APPLICATIO Ultralow Noise, Low Drift Amplifier Noise Spectrum
5V 160 3 7 + 6 140 Hz) LTC1052 √ 2 8 120 – 4 1 0.1µF 100 0.1µF 0.1µF –5V 80 5V 60 100k 3K 5V 68k 1 1.5k 3 7 5V 40 INPUT + 8 OUTPUT VOLTAGE NOISE DENSITY (nV/ LT®1007 20 6 2 – 4 100k 0 0 100 200 300 400 500 – 5V FREQUENCY (Hz) VOS = 3µV 100Ω LTC1052/7652 • TA02 VOS∆T = 50nV/°C NOISE = 0.06µVP-P 0.1Hz TO 10Hz LTC1052/7652 • TA01 1052fa 1
U FEATURES DESCRIPTIO
■ Guaranteed Max Offset: 5µV The LTC®1052 and LTC7652 are low noise zero-drift op ■ Guaranteed Max Offset Drift: 0.05µV/°C amps manufactured using Linear Technology’s enhanced ■ Typ Offset Drift: 0.01µV/°C LTCMOSTM 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.
U TYPICAL APPLICATIO Ultralow Noise, Low Drift Amplifier Noise Spectrum
5V 160 3 7 + 6 140 Hz) LTC1052 √ 2 8 120 – 4 1 0.1µF 100 0.1µF 0.1µF –5V 80 5V 60 100k 3K 5V 68k 1 1.5k 3 7 5V 40 INPUT + 8 OUTPUT VOLTAGE NOISE DENSITY (nV/ LT®1007 20 6 2 – 4 100k 0 0 100 200 300 400 500 – 5V FREQUENCY (Hz) VOS = 3µV 100Ω LTC1052/7652 • TA02 VOS∆T = 50nV/°C NOISE = 0.06µVP-P 0.1Hz TO 10Hz LTC1052/7652 • TA01 1052fa 1