AD745 Analog Devices, AD745 Datasheet
AD745
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AD745 Summary of contents
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... The AD745J and AD745K are rated over the commercial temperature range +70 C. The AD745A and AD745B are rated over the industrial temperature range of – +85 C. The AD745S is rated over the military temperature range of – +125 C and is available processed to MIL-STD-883B, Rev. C. ...
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... L 5 Defined as voltagc between inputs, such that neither exceeds 10 V from common. 6 The AD745 does not exhibit an output phase reversal when the negative common-mode limit is exceeded. All min and max specifications are guaranteed. Specifications subject to change without notice. (@ +25 C and 15 V dc, unless otherwise noted) ...
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... Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Short-Circuit Duration . . . . . . . . . . . . . . . . Indefinite Differential Input Voltage . . . . . . . . . . . . . . . . . . +V Storage Temperature Range ( – +150 C Storage Temperature Range ( – +125 C Operating Temperature Range AD745J +70 C AD745A – +85 C AD745S . . . . . . . . . . . . . . . . . . . . . . . . . . – +125 C Lead Temperature Range (Soldering 60 sec +300 C NOTES 1 Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...
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... AD745 –Typical Characteristics 10k LOAD – – SUPPLY VOLTAGE VOLTS Figure 1. Input Voltage Swing vs. Supply Voltage SUPPLY VOLTAGE VOLTS Figure 4. Quiescent Current vs. Supply Voltage 300 200 100 0 –12 –9 –6 – COMMON-MODE VOLTAGE – Volts Figure 7. Input Bias Current vs. Common-Mode Voltage ...
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... FREQUENCY – Hz Figure 14. Power Supply Rejection vs. Frequency 100 CLOSED-LOOP GAIN = +5 10 1.0 0.1 10 100 1k 10k 100k 1M 10M FREQUENCY – Hz Figure 17. Input Noise Voltage Spectral Density –5– AD745 150 140 130 120 100 SUPPLY VOLTAGE VOLTS Figure 12. Open-Loop Gain vs. Supply Voltage 35 30 ...
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... Figure 22b. Gain of 5 Follower Large Signal Pulse Response 2 s 100 Figure 23b. Gain of 4 Inverter Large Signal Pulse Response –6– 0 AD745 ADJUST –V S Figure 21. Offset Null Configuration, 8-Pin Package Pinout 500nS 100 50mV Figure 22c. Gain of 5 Follower Small ...
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... Hz with a 1/f power spectral density. For the AD745 the typical value of current noise is 6.9 fA kHz. Using the formula, I Johnson noise of a resistor, expressed as a current, one can see AD745 + RESISTOR that the current noise of the AD745 is equivalent to that 3.45 ...
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... Figures 26 and 27 show two ways to buffer and amplify the output of a charge output transducer. Both require using an amplifier which has a very high input impedance, such as the AD745. Figure 26 shows a model of a charge amplifier circuit. Here, amplification depends on the principle of conservation of charge at the input of amplifier A1, which requires that the ...
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... This graph can be JA used to predict bias current after has been computed. Again JA bias current will double for every 10 C. The designer using the AD745 in chip form (Figure 33) must also be concerned with both and , since can be affected by the type of die JC ...
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... Precision accelerometers are typi- cally calibrated for a charge output (pC/g).* Figures 35a and 35b show two ways in which to configure the AD745 as a low noise charge amplifier for use with a wide variety of piezoelectric accelerometers. The input sensitivity of these circuits will be de- ...
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... I/V conversion gain, may be augmented with further gain. A wideband low noise amplifier such as the AD829 is recommended in this application. This principle can also be used to apply the AD745 in a high performance audio application. Figure 38 shows that an I-V converter of a high performance DAC, here the AD1862, can be designed to take advantage of the low voltage noise of the AD745 (2 ...
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... TYP 0.419 (10.64) 0.394 (10.01) 0.310 (7.87) 0.220 (5.59) 0.104 (2.64) 0.003 (2.36) SEATING PLANE 0.015 (0.38) 0.008 (0.20) –12– OUTPUT AD745 INVERTING B CONNECTION 0.30 (7.62) REF + 0.011 0.003 - + (0.28 0.08) - 16-Pin SOIC (R) Package 16 9 0.292 (7.42) 0.300 (7.62) 0.0500 (1.27) ...