Datasheet AD8270 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Precision Dual-Channel, Difference Amplifier |
| 页数 / 页 | 20 / 3 — Data Sheet. AD8270. SPECIFICATIONS DIFFERENCE AMPLIFIER CONFIGURATIONS. … |
| 修订版 | A |
| 文件格式/大小 | PDF / 469 Kb |
| 文件语言 | 英语 |
Data Sheet. AD8270. SPECIFICATIONS DIFFERENCE AMPLIFIER CONFIGURATIONS. Table 2. Test Conditions/. G = 0.5. G = 1. G = 2. Parameter
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Data Sheet AD8270 SPECIFICATIONS DIFFERENCE AMPLIFIER CONFIGURATIONS
VS = ±15 V, VREF = 0 V, TA = 25°C, RLOAD = 2 kΩ, specifications referred to input, unless otherwise noted.
Table 2. Test Conditions/ G = 0.5 G = 1 G = 2 Parameter Comments Min Typ Max Min Typ Max Min Typ Max Unit
DYNAMIC PERFORMANCE Bandwidth 20 15 10 MHz Slew Rate 30 30 30 V/µs Settling Time to 0.01% 10 V step on output 700 800 700 800 700 800 ns Settling Time to 0.001% 10 V step on output 750 900 750 900 750 900 ns NOISE/DISTORTION Harmonic Distortion f = 1 kHz, VOUT = 10 V p-p, 84 145 95 dB RLOAD = 600 Ω Voltage Noise1 f = 0.1 Hz to 10 Hz 2 1.5 1 µV p-p f = 1 kHz 52 38 26 nV/√Hz GAIN Gain Error 0.08 0.08 0.08 % Gain Drift TA = −40°C to +85°C 1 10 1 10 1 10 ppm/°C INPUT CHARACTERISTICS Offset2 450 1500 300 1000 225 750 µV Average Temperature Drift TA = −40°C to +85°C 3 2 1.5 µV/°C Common-Mode Rejection DC to 1 kHz 70 86 76 92 80 98 dB Ratio Power Supply Rejection Ratio 2 10 2 10 2 10 µV/V Input Voltage Range3 −15.4 +15.4 −15.4 +15.4 −15.4 +15.4 V Common-Mode Resistance4 7.5 10 7.5 kΩ Bias Current 500 500 500 nA OUTPUT CHARACTERISTICS Output Swing −13.8 +13.8 −13.8 +13.8 −13.8 +13.8 V TA = −40°C to +85°C −13.7 +13.7 −13.7 +13.7 −13.7 +13.7 V Short-Circuit Current Limit Sourcing 100 100 100 mA Sinking 60 60 60 mA POWER SUPPLY Supply Current 2.3 2.5 2.3 2.5 2.3 2.5 mA (per Amplifier) TA = −40°C to +85°C 3 3 3 mA 1 Includes amplifier voltage and current noise, as well as noise of internal resistors. 2 Includes input bias and offset errors. 3 At voltages beyond the rails, internal ESD diodes begin to turn on. In some configurations, the input voltage range may be limited by the internal op amp (see the Input Voltage Range section for details). 4 Internal resistors are trimmed to be ratio matched but have ±20% absolute accuracy. Common-mode resistance was calculated with both inputs in parallel. Common- mode impedance at only one input is 2× the resistance listed. Rev. A | Page 3 of 20 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS DIFFERENCE AMPLIFIER CONFIGURATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION DC Performance AC Performance Production Costs Size DRIVING THE AD8270 PACKAGE CONSIDERATIONS POWER SUPPLIES INPUT VOLTAGE RANGE APPLICATIONS INFORMATION DIFFERENCE AMPLIFIER CONFIGURATIONS SINGLE-ENDED CONFIGURATIONS Gain of 1 Configuration DIFFERENTIAL OUTPUT DRIVING AN ADC DRIVING CABLING OUTLINE DIMENSIONS ORDERING GUIDE
Data Sheet AD8270 SPECIFICATIONS DIFFERENCE AMPLIFIER CONFIGURATIONS
VS = ±15 V, VREF = 0 V, TA = 25°C, RLOAD = 2 kΩ, specifications referred to input, unless otherwise noted.
Table 2. Test Conditions/ G = 0.5 G = 1 G = 2 Parameter Comments Min Typ Max Min Typ Max Min Typ Max Unit
DYNAMIC PERFORMANCE Bandwidth 20 15 10 MHz Slew Rate 30 30 30 V/µs Settling Time to 0.01% 10 V step on output 700 800 700 800 700 800 ns Settling Time to 0.001% 10 V step on output 750 900 750 900 750 900 ns NOISE/DISTORTION Harmonic Distortion f = 1 kHz, VOUT = 10 V p-p, 84 145 95 dB RLOAD = 600 Ω Voltage Noise1 f = 0.1 Hz to 10 Hz 2 1.5 1 µV p-p f = 1 kHz 52 38 26 nV/√Hz GAIN Gain Error 0.08 0.08 0.08 % Gain Drift TA = −40°C to +85°C 1 10 1 10 1 10 ppm/°C INPUT CHARACTERISTICS Offset2 450 1500 300 1000 225 750 µV Average Temperature Drift TA = −40°C to +85°C 3 2 1.5 µV/°C Common-Mode Rejection DC to 1 kHz 70 86 76 92 80 98 dB Ratio Power Supply Rejection Ratio 2 10 2 10 2 10 µV/V Input Voltage Range3 −15.4 +15.4 −15.4 +15.4 −15.4 +15.4 V Common-Mode Resistance4 7.5 10 7.5 kΩ Bias Current 500 500 500 nA OUTPUT CHARACTERISTICS Output Swing −13.8 +13.8 −13.8 +13.8 −13.8 +13.8 V TA = −40°C to +85°C −13.7 +13.7 −13.7 +13.7 −13.7 +13.7 V Short-Circuit Current Limit Sourcing 100 100 100 mA Sinking 60 60 60 mA POWER SUPPLY Supply Current 2.3 2.5 2.3 2.5 2.3 2.5 mA (per Amplifier) TA = −40°C to +85°C 3 3 3 mA 1 Includes amplifier voltage and current noise, as well as noise of internal resistors. 2 Includes input bias and offset errors. 3 At voltages beyond the rails, internal ESD diodes begin to turn on. In some configurations, the input voltage range may be limited by the internal op amp (see the Input Voltage Range section for details). 4 Internal resistors are trimmed to be ratio matched but have ±20% absolute accuracy. Common-mode resistance was calculated with both inputs in parallel. Common- mode impedance at only one input is 2× the resistance listed. Rev. A | Page 3 of 20 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS DIFFERENCE AMPLIFIER CONFIGURATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION DC Performance AC Performance Production Costs Size DRIVING THE AD8270 PACKAGE CONSIDERATIONS POWER SUPPLIES INPUT VOLTAGE RANGE APPLICATIONS INFORMATION DIFFERENCE AMPLIFIER CONFIGURATIONS SINGLE-ENDED CONFIGURATIONS Gain of 1 Configuration DIFFERENTIAL OUTPUT DRIVING AN ADC DRIVING CABLING OUTLINE DIMENSIONS ORDERING GUIDE