AD820

AD820 (Rev. H)

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• Manufacturer or author: Analog Devices, Inc.
• PDF pages: 24

Technical content

Rev. H | Page 2 of 24 TABLE OF CONTENTS

REVISION HISTORY

3/11—Rev. G to Rev. H 2/10—Rev. F to Rev. G 11/08—Rev. E to Rev. F Changes to Features Section, Figure 2 Caption, and General Changes to Settling Time Parameter, Common-Mode Voltage Range Parameter, and Power Supply Rejection Parameter in Changes to Settling Time Parameter, Common-Mode Voltage Range Parameter, and Power Supply Rejection Parameter in Changes to Settling Time Parameter, Common-Mode Voltage Range Parameter, and Power Supply Rejection Parameter in Changed Application Notes Section to Applications 2/07—Rev. D to Rev. E 5/02—Rev. C to Rev. D

Rev. H | Page 3 of 24 SPECIFICATIONS VS = 0 V, 5 V @ TA = 25°C, VCM = 0 V, VOUT = 0.2 V, unless otherwise noted. Table 1. AD820A AD820B Parameter Conditions Min Typ Max Min Typ Max Unit DC PERFORMANCE Initial Offset 0.1 0.8 0.1 0.4 mV Maximum Offset over Temperature 0.5 1.2 0.5 0.9 mV Offset Drift 2 2 μV/°C Input Bias Current VCM = 0 V to 4 V 2 25 2 10 pA At TMAX 0.5 5 0.5 2.5 nA Input Offset Current 2 20 2 10 pA At TMAX 0.5 0.5 nA Open-Loop Gain VOUT = 0.2 V to 4 V RL = 100 kΩ 400 1000 500 1000 V/mV TMIN to TMAX 400 400 V/mV RL = 10 kΩ 80 150 80 150 V/mV TMIN to TMAX 80 80 V/mV RL = 1 kΩ 15 30 15 30 V/mV TMIN to TMAX 10 10 V/mV NOISE/HARMONIC PERFORMANCE Input Voltage Noise f = 0.1 Hz to 10 Hz 2 2 μV p-p f = 10 Hz 25 25 nV/√Hz f = 100 Hz 21 21 nV/√Hz f = 1 kHz 16 16 nV/√Hz f = 10 kHz 13 13 nV/√Hz Input Current Noise f = 0.1 Hz to 10 Hz 18 18 fA p-p f = 1 kHz 0.8 0.8 fA/√Hz Harmonic Distortion RL = 10 kΩ to 2.5 V f = 10 kHz VOUT = 0.25 V to 4.75 V −93 −93 dB DYNAMIC PERFORMANCE Unity Gain Frequency 1.8 1.8 MHz Full Power Response VOUT p-p = 4.5 V 210 210 kHz Slew Rate 3 3 V/μs Settling Time VOUT = 0.2 V to 4.5 V To 0.1% 1.4 1.4 μs To 0.01% 1.8 1.8 μs INPUT CHARACTERISTICS Common-Mode Voltage Range1 TMIN to TMAX −0.2 +4 –0.2 +4 V CMRR VCM = 0 V to 2 V 66 80 72 80 dB TMIN to TMAX 66 66 dB Input Impedance Differential 1013||0.5 1013||0.5 Ω||pF Common Mode 1013||2.8 1013||2.8 Ω||pF

Rev. H | Page 4 of 24 AD820A AD820B Parameter Conditions Min Typ Max Min Typ Max Unit OUTPUT CHARACTERISTICS Output Saturation Voltage2 VOL − VEE ISINK = 20 μA 5 7 5 7 mV TMIN to TMAX 10 10 mV VCC − VOH ISOURCE = 20 μA 10 14 10 14 mV TMIN to TMAX 20 20 mV VOL − VEE ISINK = 2 mA 40 55 40 55 mV TMIN to TMAX 80 80 mV VCC − VOH ISOURCE = 2 mA 80 110 80 110 mV TMIN to TMAX 160 160 mV VOL − VEE ISINK = 15 mA 300 500 300 500 mV TMIN to TMAX 1000 1000 mV VCC − VOH ISOURCE = 15 mA 800 1500 800 1500 mV TMIN to TMAX 1900 1900 mV Operating Output Current 15 15 mA TMIN to TMAX 12 12 mA Short-Circuit Current 25 25 mA Capacitive Load Drive 350 350 pF POWER SUPPLY Quiescent Current TMIN to TMAX 620 800 620 800 μA Power Supply Rejection V+ = 5 V to 15 V 70 80 66 80 dB TMIN to TMAX 70 66 dB 1 This is a functional specification. Amplifier bandwidth decreases when the input common-mode voltage is driven in the range ((V+) − 1 V) to V+. Common-mode error voltage is typically less than 5 mV with the common-mode voltage set at 1 V below the positive supply. 2 VOL − VEE is defined as the difference between the lowest possible output voltage (VOL) and the negative voltage supply rail (VEE). VCC − VOH is defined as the difference between the highest possible output voltage (VOH) and the positive supply voltage (VCC).

Rev. H | Page 5 of 24 VS = ±5 V @ TA = 25°C, VCM = 0 V, VOUT = 0 V, unless otherwise noted. Table 2. AD820A AD820B Parameter Conditions Min Typ Max Min Typ Max Unit DC PERFORMANCE Initial Offset 0.1 0.8 0.3 0.4 mV Maximum Offset over Temperature 0.5 1.5 0.5 1 mV Offset Drift 2 2 μV/°C Input Bias Current VCM = −5 V to +4 V 2 25 2 10 pA At TMAX 0.5 5 0.5 2.5 nA Input Offset Current 2 20 2 10 pA At TMAX 0.5 0.5 nA Open-Loop Gain VOUT = −4 V to +4 V RL = 100 kΩ 400 1000 400 1000 V/mV TMIN to TMAX 400 400 V/mV RL = 10 kΩ 80 150 80 150 V/mV TMIN to TMAX 80 80 V/mV RL = 1 kΩ 20 30 20 30 V/mV TMIN to TMAX 10 10 V/mV NOISE/HARMONIC PERFORMANCE Input Voltage Noise f = 0.1 Hz to 10 Hz 2 2 μV p-p f = 10 Hz 25 25 nV/√Hz f = 100 Hz 21 21 nV/√Hz f = 1 kHz 16 16 nV/√Hz f = 10 kHz 13 13 nV/√Hz Input Current Noise f = 0.1 Hz to 10 Hz 18 18 fA p-p f = 1 kHz 0.8 0.8 fA/√Hz Harmonic Distortion RL = 10 kΩ f = 10 kHz VOUT = ±4.5 V −93 −93 dB DYNAMIC PERFORMANCE Unity Gain Frequency 1.9 1.8 MHz Full Power Response VOUT p-p = 9 V 105 105 kHz Slew Rate 3 3 V/μs Settling Time VOUT = 0 V to ±4.5 V To 0.1% 1.4 1.4 μs To 0.01% 1.8 1.8 μs INPUT CHARACTERISTICS Common-Mode Voltage Range1 TMIN to TMAX −5.2 +4 −5.2 +4 V CMRR VCM = −5 V to +2 V 66 80 72 80 dB TMIN to TMAX 66 66 dB Input Impedance Differential 1013||0.5 1013||0.5 Ω||pF Common Mode 1013||2.8 1013||2.8 Ω||pF

Rev. H | Page 6 of 24 AD820A AD820B Parameter Conditions Min Typ Max Min Typ Max Unit OUTPUT CHARACTERISTICS Output Saturation Voltage2 VOL − VEE ISINK = 20 μA 5 7 5 7 mV TMIN to TMAX 10 10 mV VCC − VOH ISOURCE = 20 μA 10 14 10 14 mV TMIN to TMAX 20 20 mV VOL − VEE ISINK = 2 mA 40 55 40 55 mV TMIN to TMAX 80 80 mV VCC − VOH ISOURCE = 2 mA 80 110 80 110 mV TMIN to TMAX 160 160 mV VOL − VEE ISINK = 15 mA 300 500 300 500 mV TMIN to TMAX 1000 1000 mV VCC − VOH ISOURCE = 15 mA 800 1500 800 1500 mV TMIN to TMAX 1900 1900 mV Operating Output Current 15 15 mA TMIN to TMAX 12 12 mA Short-Circuit Current 30 30 mA Capacitive Load Drive 350 350 pF POWER SUPPLY Quiescent Current TMIN to TMAX 650 800 620 800 μA Power Supply Rejection V+ = 5 V to 15 V 70 80 70 80 dB TMIN to TMAX 70 70 dB 1 This is a functional specification. Amplifier bandwidth decreases when the input common-mode voltage is driven in the range ((V+) − 1 V) to V+. Common-mode error voltage is typically less than 5 mV with the common-mode voltage set at 1 V below the positive supply. 2 VOL − VEE is defined as the difference between the lowest possible output voltage (VOL) and the negative voltage supply rail (VEE). VCC − VOH is defined as the difference between the highest possible output voltage (VOH) and the positive supply voltage (VCC).

Rev. H | Page 7 of 24 VS = ±15 V @ TA = 25°C, VCM = 0 V, VOUT = 0 V, unless otherwise noted. Table 3. AD820A AD820B Parameter Conditions Min Typ Max Min Typ Max Unit DC PERFORMANCE Initial Offset 0.4 2 0.3 1.0 mV Maximum Offset over Temperature 0.5 3 0.5 2 mV Offset Drift 2 2 μV/°C Input Bias Current VCM = 0 V 2 25 2 10 pA VCM = −10 V 40 40 pA At TMAX VCM = 0 V 0.5 5 0.5 2.5 nA Input Offset Current 2 20 2 10 pA At TMAX 0.5 0.5 nA Open-Loop Gain VOUT = −10 V to +10 V RL = 100 kΩ 500 2000 500 2000 V/mV TMIN to TMAX 500 500 V/mV RL = 10 kΩ 100 500 100 500 V/mV TMIN to TMAX 100 100 V/mV RL = 1 kΩ 30 45 30 45 V/mV TMIN to TMAX 20 20 V/mV NOISE/HARMONIC PERFORMANCE Input Voltage Noise f = 0.1 Hz to 10 Hz 2 2 μV p-p f = 10 Hz 25 25 nV/√Hz f = 100 Hz 21 21 nV/√Hz f = 1 kHz 16 16 nV/√Hz f = 10 kHz 13 13 nV/√Hz Input Current Noise f = 0.1 Hz to 10 Hz 18 18 fA p-p f = 1 kHz 0.8 0.8 fA/√Hz Harmonic Distortion RL = 10 kΩ f = 10 kHz VOUT = ±10 V −85 −85 dB DYNAMIC PERFORMANCE Unity Gain Frequency 1.9 1.9 MHz Full Power Response VOUT p-p = 20 V 45 45 kHz Slew Rate 3 3 V/μs Settling Time VOUT = 0 V to ±10 V To 0.1% 4.1 4.1 μs To 0.01% 4.5 4.5 μs INPUT CHARACTERISTICS Common-Mode Voltage Range1 TMIN to TMAX −15.2 +14 −15.2 +14 V CMRR VCM = –15 V to +12 V 70 80 74 90 dB TMIN to TMAX 70 74 dB Input Impedance Differential 1013||0.5 1013||0.5 Ω||pF Common Mode 1013||2.8 1013||2.8 Ω||pF

Rev. H | Page 8 of 24 AD820A AD820B Parameter Conditions Min Typ Max Min Typ Max Unit OUTPUT CHARACTERISTICS Output Saturation Voltage2 VOL − VEE ISINK = 20 μA 5 7 5 7 mV TMIN to TMAX 10 10 mV VCC − VOH ISOURCE = 20 μA 10 14 10 14 mV TMIN to TMAX 20 20 mV VOL − VEE ISINK = 2 mA 40 55 40 55 mV TMIN to TMAX 80 80 mV VCC − VOH ISOURCE = 2 mA 80 110 80 110 mV TMIN to TMAX 160 160 mV VOL − VEE ISINK = 15 mA 300 500 300 500 mV TMIN to TMAX 1000 1000 mV VCC − VOH ISOURCE = 15 mA 800 1500 800 1500 mV TMIN to TMAX 1900 1900 mV Operating Output Current 20 20 mA TMIN to TMAX 15 15 mA Short-Circuit Current 45 45 mA Capacitive Load Drive 350 350 pF POWER SUPPLY Quiescent Current TMIN to TMAX 700 900 700 900 μA Power Supply Rejection V+ = 5 V to 15 V 70 80 70 80 dB TMIN to TMAX 70 70 dB 1 This is a functional specification. Amplifier bandwidth decreases when the input common-mode voltage is driven in the range ((V+) − 1 V) to V+. Common-mode error voltage is typically less than 5 mV with the common-mode voltage set at 1 V below the positive supply. 2 VOL − VEE is defined as the difference between the lowest possible output voltage (VOL) and the negative voltage supply rail (VEE). VCC − VOH is defined as the difference between the highest possible output voltage (VOH) and the positive supply voltage (VCC).

1 See Input Characteristics section. soldered in a circuit board for surface-mount packages. Table 5. Thermal Resistance

up to ±18 V can be rectified, depending on the voltage supply used. Figure 43. Single-Supply Half- and Full-Wave Rectifier

4.5 V LOW DROPOUT, LOW POWER REFERENCE

pass RC filter to reduce the noise contribution of the AD680. Figure 44. Single Supply 4.5 V Low Dropout Reference current is under 20 mV , and settles out in a few microseconds. the inherent output voltage noise of the filter. Figure 45. 10 Hz Sallen Key Low-Pass Filter

Figure 46. Offset Null

0.65 BSC

1.10 MAX

Figure 49. 8-Lead Mini Small Outline Package [MSOP]

Rev. H | Page 22 of 24 NOTES

Rev. H | Page 23 of 24 NOTES

Rev. H | Page 24 of 24 NOTES ©1996–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00873-0-3/11(H)