MSU PHY 440 - AD624_c (15 pages)

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AD624_c



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AD624_c

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Pages:
15
School:
Michigan State University
Course:
Phy 440 - Electronics
Electronics Documents
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a FEATURES Low Noise 0 2 V p p 0 1 Hz to 10 Hz Low Gain TC 5 ppm max G 1 Low Nonlinearity 0 001 max G 1 to 200 High CMRR 130 dB min G 500 to 1000 Low Input Offset Voltage 25 V max Low Input Offset Voltage Drift 0 25 V C max Gain Bandwidth Product 25 MHz Pin Programmable Gains of 1 100 200 500 1000 No External Components Required Internally Compensated Precision Instrumentation Amplifier AD624 FUNCTIONAL BLOCK DIAGRAM 50V INPUT G 100 AD624 225 3V 4445 7V G 200 124V VB G 500 10kV SENSE 80 2V RG1 RG2 20kV 10kV 20kV 10kV OUTPUT 10kV 50V REF INPUT PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS The AD624 is a high precision low noise instrumentation amplifier designed primarily for use with low level transducers including load cells strain gauges and pressure transducers An outstanding combination of low noise high gain accuracy low gain temperature coefficient and high linearity make the AD624 ideal for use in high resolution data acquisition systems 1 The AD624 offers outstanding noise performance Input noise is typically less than 4 nV Hz at 1 kHz 2 The AD624 is a functionally complete instrumentation amplifier Pin programmable gains of 1 100 200 500 and 1000 are provided on the chip Other gains are achieved through the use of a single external resistor The AD624C has an input offset voltage drift of less than 0 25 V C output offset voltage drift of less than 10 V C CMRR above 80 dB at unity gain 130 dB at G 500 and a maximum nonlinearity of 0 001 at G 1 In addition to these outstanding dc specifications the AD624 exhibits superior ac performance as well A 25 MHz gain bandwidth product 5 V s slew rate and 15 s settling time permit the use of the AD624 in high speed data acquisition applications 3 The offset voltage offset voltage drift gain accuracy and gain temperature coefficients are guaranteed for all pretrimmed gains The AD624 does not need any external components for pretrimmed gains of 1 100 200 500 and 1000 Additional gains such as 250 and 333 can be programmed within one percent accuracy with external jumpers A single external resistor can also be used to set the 624 s gain to any value in the range of 1 to 10 000 5 A sense terminal is provided to enable the user to minimize the errors induced through long leads A reference terminal is also provided to permit level shifting at the output 4 The AD624 provides totally independent input and output offset nulling terminals for high precision applications This minimizes the effect of offset voltage in gain ranging applications REV C Information furnished by Analog Devices is believed to be accurate and reliable However no responsibility is assumed by Analog Devices for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of Analog Devices One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 World Wide Web Site http www analog com Fax 781 326 8703 Analog Devices Inc 1999 AD624 SPECIFICATIONS V 15 V R 2 k and T 25 C unless otherwise noted S Model Min GAIN Gain Equation External Resistor Gain Programming Gain Range Pin Programmable Gain Error G 1 G 100 G 200 500 Nonlinearity G 1 G 100 200 G 500 Gain vs Temperature G 1 G 100 200 G 500 AD624A Typ 40 000 R G INPUT Input Impedance Differential Resistance Differential Capacitance Common Mode Resistance Common Mode Capacitance Input Voltage Range1 Max Differ Input Linear VDL 109 10 109 10 20 10 12 V 8 10 40 000 R G Max G 2 Min AD624C Typ 40 000 R G 1 20 Max Min 40 000 R G 1 20 1 to 1000 AD624S Typ Max Units 1 20 1 to 1000 0 05 0 25 0 5 0 03 0 15 0 35 0 02 0 1 0 25 0 05 0 25 0 5 0 005 0 005 0 005 0 003 0 003 0 005 0 001 0 001 0 005 0 005 0 005 0 005 5 10 25 5 10 15 5 10 15 5 10 15 ppm C ppm C ppm C 200 2 5 50 75 0 5 3 25 25 0 25 2 10 75 2 0 3 50 V V C mV V C 50 80 110 115 50 35 20 25 15 VD 10 12 V G 2 20 15 50 10 20 109 10 109 10 VD 75 105 120 dB dB dB 75 105 110 50 109 10 109 10 70 100 110 NOISE Voltage Noise 1 kHz R T I R T O R T I 0 1 Hz to 10 Hz G 1 G 100 G 200 500 1000 Current Noise 0 1 Hz to 10 Hz AD624B Typ 75 105 110 50 DYNAMIC RESPONSE Small Signal 3 dB G 1 G 100 G 200 G 500 G 1000 Slew Rate Settling Time to 0 01 20 V Step G 1 to 200 G 500 G 1000 A 1 to 1000 INPUT CURRENT Input Bias Current vs Temperature Input Offset Current vs Temperature SENSE INPUT RIN IIN Voltage Range Gain to Output 1 to 1000 OUTPUT RATING V RL 2 k Min 1 20 VOLTAGE OFFSET May be Nulled Input Offset Voltage vs Temperature Output Offset Voltage vs Temperature OUT Offset Referred to the Input vs Supply G 1 70 G 100 200 95 G 500 100 Max Common Mode Linear V CM Common Mode Rejection dc to 60 Hz with 1 k Source Imbalance G 1 G 100 200 G 500 Max L 10 12 V G 2 50 35 pF pF 109 10 109 10 VD 80 110 130 10 12 V G 2 nA pA C nA pA C VD V V dB dB dB 70 100 110 10 10 10 10 V 1 150 100 50 25 5 0 1 150 100 50 25 5 0 1 150 100 50 25 5 0 1 150 100 50 25 5 0 MHz kHz kHz kHz kHz V s 15 35 75 15 35 75 15 35 75 15 35 75 s s s 4 75 4 75 4 75 4 75 nV Hz nV Hz 10 0 3 0 2 10 0 3 0 2 10 0 3 0 2 10 0 3 0 2 V p p V p p V p p 60 60 60 60 pA p p 10 30 1 12 8 10 10 30 1 2 12 8 10 10 30 1 12 8 10 10 30 1 12 k A V REV C AD624 Model Min REFERENCE INPUT RIN IIN Voltage Range Gain to Output AD624A Typ 16 10 20 30 Max Min 24 16 10 1 TEMPERATURE RANGE Specified Performance Storage POWER SUPPLY Power Supply Range Quiescent Current 25 65 6 AD624B Typ 20 30 Max Min 24 16 10 …


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