Datasheet LT1126, LT1127 (Analog Devices) - 6

LT1126/LT1127
W U TYPICAL PERFOR A CE CH C ARA TERISTICS Total Harmonic Distortion Total Harmonic Distortion and Noise vs Frequency for and Noise vs Frequency for Intermodulation Distortion Inverting Gain Non-Inverting Gain (CCIF Method)* vs Frequency
0.1 0.1 0.1 Z Z Z L = 2k/15pF L = 2k/15pF L = 2k/15pF V V f (IM) = 1kHz O = 20Vp-p O = 20Vp-p A A f V = –10, –100 V = +10, +100 O = 13.5kHz MEASUREMENT BANDWITH MEASUREMENT BANDWITH VO = 20Vp-p = 10Hz TO 80kHz = 10Hz TO 80kHz AV = –10 0.010 0.010 0.010 MEASUREMENT BANDWITH = 10Hz TO 80kHz AV = +100 AV = –100 0.001 0.001 0.001 AV = –10 AV = +10 LT1126 TOTAL HARMONIC DISTORTION + NOISE (%) TOTAL HARMONIC DISTORTION + NOISE (%) INTERMODULATION DISTORTION (IMD) (%) 0.0001 0.0001 0.0001 20 100 1k 10k 20k 20 100 1k 10k 20k 3k 10k 20k FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) 1126-7 G07 1126-7 G08 1126-7 G09 *See LT1115 data sheet for definition of CCIF testing
U U W U APPLICATIO S I FOR ATIO Matching Specifications
Some specifications are guaranteed by definition. For example, 70µV maximum offset voltage implies that mis- In many applications the performance of a system de- match cannot be more than 140µV. 112dB (= 2.5µV/V) pends on the matching between two op amps, rather than CMRR means that worst case CMRR match is 106dB the individual characteristics of the two devices. The three (5µV/V). However, the following table can be used to op amp instrumentation amplifier configuration shown in estimate the expected matching performance between the this data sheet is an example. Matching characteristics are two sides of the LT1126, and between amplifiers A and D, not 100% tested on the LT1126/LT1127. and between amplifiers B and C of the LT1127.
Expected Match LT1126AM/AC LT1126M/C LT1127AM/AC LT1127M/C PARAMETER 50% YIELD 98% YIELD 50% YIELD 98% YIELD UNITS
VOS Match, ∆VOS LT1126 20 110 30 130 µV LT1127 30 150 50 180 µV Temperature Coefficient Match 0.35 1.0 0.5 1.5 µV/°C Average Non-Inverting IB 6 18 7 25 nA Match of Non-Inverting IB 7 22 8 30 nA CMRR Match 126 115 123 112 dB PSRR Match 127 118 127 114 dB 11267fa 6