AD621 Analog Devices, Inc., AD621 Datasheet
AD621
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AD621 Summary of contents
Page 1
... PRODUCT DESCRIPTION The AD621 is an easy to use, low cost, low power, high accu- racy instrumentation amplifier that is ideally suited for a wide range of applications. Its unique combination of high perfor- mance, small size and low power, outperforms discrete in amp implementations. High functionality, low gain errors, and low ...
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... ± 18 800 0.75 1.2 0. –V + 1.6 +V – 1.6 – ± 0.0001 ± 2.3 ± 18 ± 2.3 0.9 1.3 1.1 1.6 –40 to +85 1 AD621B AD621S Typ Max Min Typ Max 0.05 0. ± 5 ± 5 –1.5 –1 50 125 75 250 215 500 0.6 1.5 1.0 2.5 120 95 120 0.55 0.8 0.55 ...
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... V + 1.6 +V – 1 ± 0.0001 1 ± 0.0001 ± 18 ± 2.3 ± 18 0.9 1.3 0.9 1.3 1.1 1.6 1.1 1.6 –40 to +85 –55 to +125 AD621 Unit % ppm of FS ppm/°C µV µV µV/°C dB nV/√Hz µV p-p fA/√ pA/° pA/°C GΩ pF GΩ ...
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... Output Short Circuit Duration . . . . . . . . . . . . . . . . Indefinite Storage Temperature Range ( –65°C to +150°C Storage Temperature Range ( –65°C to +125°C Operating Temperature Range AD621 ( – 40°C to +85°C AD621 ( – 55°C to +125°C Lead Temperature Range (Soldering 10 seconds 300°C NOTES 1 Stresses above those listed under Absolute Maximum Ratings may cause perma- nent damage to the device. This is a stress rating only ...
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... SAMPLE SIZE = –80 –40 0 +40 INPUT OFFSET VOLTAGE – SAMPLE SIZE = –400 –200 0 +200 INPUT OFFSET CURRENT – pA Typical Performance Characteristics–AD621 50 SAMPLE SIZE = –800 +200 2.0 1.5 1.0 0 1000 100 10 1 +400 ...
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... TIME – 1 sec/div TIME – 1 sec/div 100 100 1000 100,000 10,000 1000 100 10 160 140 120 100 0.1 100mV 1s FET INPUT IN AMP AD621A 1k 10k 100k 1M SOURCE RESISTANCE – GAIN = 100 GAIN = 100 1k 10k 100k FREQUENCY – Hz 10M 1M Ω ...
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... S –0.5 –1.0 –1.5 +1.5 +1.0 +0.5 +0.0 –V S 100k –0.0 S –0.5 –1.0 –1.5 +1.5 +1.0 +0.5 –V +0 10M AD621 & 100 10k 100k FREQUENCY – SUPPLY VOLTAGE Volts R = 10k 10k SUPPLY VOLTAGE Volts ...
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... AD621 15V 100 LOAD RESISTANCE – 5V 1mV 100 20mV 100 Ω 100 10k 10 s 100 Ω 1mV 10 s Ω 20mV 10 s Ω TO 0.01 OUTPUT STEP SIZE – Volts ...
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... TEMPERATURE – C 0PW 0 VZR 0 100 V 100 WFM 20 WFM AQR WARNING µ 100 µ 100k 1% INPUT 20V p 11k 0.1% 125 175 2V Ω AD621 100 V 2V Ω 10k 1k 10k 1% 10T – 100 AD621 100 0.1% + – OUT ...
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... On chip gain resistors are pretrimmed for gains of 10 and 100. The AD621 is preset to a gain of 10. A single external jumper (between Pins 1 and 8) is all that is needed to select a gain of 100. Special design techniques assure a low gain ppm/°C max, even at a gain of 100 ...
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... V common-mode signal will amplify a ± 1.25 V differential signal while suppressing offset by use of the DAC driving the reference pin of the AD621. An added benefit, the offsetting DAC connected to the reference pin allows removal signal without the associated time-constant of ac coupling ...
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... DIFF differential-mode input for ± supplies and cascading with use of the optional AD621, the circuit of Figure 6 will provide ± zero suppression at gains of 10 and 100 ( ± 4 ppm/°C and ± 8 ppm/°C, respectively. Therefore, depend- ing on the magnitude of the differential input signal, either ...
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... R1 ± INPUT AND OUTPUT OFFSET VOLTAGE The AD621 is fully specified for total input errors at gains of 10 and 100. That is, effects of all error sources within the AD621 are properly included in the guaranteed input error specs, elimi- nating the need for separate error calculation. ...
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... AD621 Gain Selection The AD621 has accurate, low temperature coefficient (TC), gains of 10 and 100 available. The gain of the AD621 is nomi- nally set at 10; this is easily changed to a gain of 100 by simply connecting a jumper between Pins 1 and 8. 555.5 AD621 R 5,555.5 EXT As shown in Figure 11, the device can be programmed for any gain between 10 and 100 by connecting a single external resistor between Pins 1 and 8 ...
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... GROUNDING Since the AD621 output voltage is developed with respect to the potential on the reference terminal, it can solve many ground- ing problems by simply tying the REF pin to the appropriate “local ground.” In order to isolate low level analog signals from a noisy digital environment, many data-acquisition components have separate analog and digital ground pins (Figure 15). It would be conve- nient to use a single ground line ...
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... AD621 SEATING PLANE 0.010 (0.25) 0.004 (0.10) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). Plastic DIP (N-8) Package 8 5 0.25 0.31 (6.35) (7.87 0.39 (9.91) MAX 0.035 0.01 (0.89 0.25) 0.165 0.01 (4.19 0.25) 0.125 (3.18) MIN 0.18 0.03 (4.57 0.76) 0. 0.018 0.003 (2.54) (0.46 0.08) TYP 0.033 (0.84) NOM Cerdip (Q-8) Package 0.005 (0.13) MIN 0.055 (1.4) MAX 8 5 0.310 (7.87) 0.220 (5.59 0.070 (1.78) 0.030 (0.76) 0.320 (8.13) 0.290 (7.37) ...