AD745KR-16 Analog Devices Inc, AD745KR-16 Datasheet
AD745KR-16
Specifications of AD745KR-16
Related parts for AD745KR-16
AD745KR-16 Summary of contents
Page 1
Hz Hz PRODUCT DESCRIPTION The AD745 is an ultralow noise, high-speed, FET input opera- tional amplifier. It offers both the ultralow voltage noise and high speed generally associated with bipolar input op amps and the very low input currents ...
Page 2
AD745–SPECIFICATIONS AD745 ELECTRICAL CHARACTERISTICS Model Conditions 1 INPUT OFFSET VOLTAGE Initial Offset Initial Offset MIN vs. Temp MIN vs. Supply (PSRR vs. Supply (PSRR MIN 3 ...
Page 3
... Using an IMCS 5000 automated ESD tester, the two null pins will pass at voltages up to 1,000 volts, while all other pins will S pass at voltages exceeding 2,500 volts. and – Model AD745JR-16 AD745KR- Small Outline IC. = 30°C/W AD745 ORDERING GUIDE Package Temperature Range Option 0°C to 70°C R-16 0° ...
Page 4
AD745 –Typical Performance Characteristics 10k LOAD – SUPPLY VOLTAGE VOLTS SUPPLY VOLTAGE VOLTS 300 200 ...
Page 5
PHASE GAIN 20 0 –20 100 1k 10k 100k 1M 10M 100M FREQUENCY – Hz 120 110 100 10V 100 1k 10k 100k 1M 10M FREQUENCY – ...
Page 6
AD745 72 TOTAL UNITS = 760 –15 –10 – INPUT OFFSET VOLTAGE DRIFT – ° ° 648 TOTAL UNITS = 4100 594 ...
Page 7
OP AMP PERFORMANCE JFET VERSUS BIPOLAR The AD745 offers the low input voltage noise of an industry standard bipolar opamp without its inherent input current errors. This is demonstrated in Figure 3, which compares input voltage noise vs. input source ...
Page 8
AD745 Figures 5 and 6 show two ways to buffer and amplify the output of a charge output transducer. Both require the use of an ampli- fier that has a very high input impedance, such as the AD745. Figure 5 ...
Page 9
HOW CHIP PACKAGE TYPE AND POWER DISSIPATION AFFECT INPUT BIAS CURRENT As with all JFET input amplifiers, the input bias current of the AD745 is a direct function of device junction temperature, I approximately doubling every 10°C. Figure 9 shows ...
Page 10
AD745 TWO HIGH PERFORMANCE ACCELEROMETER AMPLIFIERS Two of the most popular charge-out transducers are hydrophones and accelerometers. Precision accelerometers are typically cali- brated for a charge output (pC/g). Figures 14 and 15 show two ways in which to configure the ...
Page 11
DESIGN CONSIDERATIONS FOR I-TO-V CONVERTERS There are some simple rules of thumb when designing an I-V converter where there is significant source capacitance (as with a photodiode) and bandwidth needs to be optimized. Consider the circuit of Figure 18. The ...
Page 12
AD745 FOR R >> AD745 NONINVERTING 0.0118 (0.30) 0.0040 (0.10) Revision History ...