Datasheet AD8278, AD8279 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Low Power, Wide Supply Range, Low Cost Difference Amplifiers, G = ½, 2 |
| 页数 / 页 | 24 / 4 — AD8278/AD8279. Table 3. G = 2. Grade B. Grade A. Parameter Conditions. … |
| 修订版 | C |
| 文件格式/大小 | PDF / 519 Kb |
| 文件语言 | 英语 |
AD8278/AD8279. Table 3. G = 2. Grade B. Grade A. Parameter Conditions. Min. Typ Max. Unit
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AD8278/AD8279
VS = ±5 V to ±15 V, VREF = 0 V, TA = 25°C, RL = 10 kΩ connected to ground, G = 2 difference amplifier configuration, unless otherwise noted.
Table 3. G = 2 Grade B Grade A Parameter Conditions Min Typ Max Min Typ Max Unit
INPUT CHARACTERISTICS System Offset1 100 200 100 500 μV Over Temperature TA = −40°C to +85°C 200 500 μV vs. Power Supply VS = ±5 V to ±18 V 5 10 μV/V Average Temperature Coefficient TA = −40°C to +85°C 0.6 2 2 5 μV/°C Common-Mode VS = ±15 V, VCM = ±27 V, Rejection Ratio (RTI) RS = 0 Ω 86 80 dB Input Voltage Range2 −1.5 (VS + 0.1) +1.5 (VS − 1.5) −1.5 (VS + 0.1) +1.5 (VS − 1.5) V Impedance3 Differential 30 30 kΩ Common Mode 30 30 kΩ DYNAMIC PERFORMANCE Bandwidth 550 550 kHz Slew Rate 1.1 1.4 1.1 1.4 V/μs Channel Separation f = 1 kHz 130 130 dB Settling Time to 0.01% 10 V step on output, CL = 100 pF 10 10 μs Settling Time to 0.001% 11 11 μs GAIN Gain Error 0.005 0.02 0.01 0.05 % Gain Drift TA = −40°C to +85°C 1 5 ppm/°C Gain Nonlinearity VOUT = 20 V p-p 7 12 ppm OUTPUT CHARACTERISTICS Output Voltage Swing4 VS = ±15 V, RL = 10 kΩ, TA = −40°C to +85°C −VS + 0.2 +VS − 0.2 −VS + 0.2 +VS − 0.2 V Short-Circuit Current Limit ±15 ±15 mA Capacitive Load Drive 350 350 pF NOISE5 Output Voltage Noise f = 0.1 Hz to 10 Hz 2.8 2.8 μV p-p f = 1 kHz 90 95 90 95 nV/√Hz POWER SUPPLY6 AD8278 Supply Current 200 200 μA Over Temperature TA = −40°C to +85°C 250 250 μA AD8279 Supply Current 300 350 300 350 μA Over Temperature TA = −40°C to +85°C 400 400 μA Operating Voltage Range7 ±2 ±18 ±2 ±18 V TEMPERATURE RANGE Operating Range −40 +125 −40 +125 °C 1 Includes input bias and offset current errors, RTO (referred to output). 2 The input voltage range may also be limited by absolute maximum input voltage or by the output swing. See the Input Voltage Range section for details. 3 Internal resistors are trimmed to be ratio matched and have ±20% absolute accuracy. 4 Output voltage swing varies with supply voltage and temperature. See Figure 22 through Figure 25 for details. 5 Includes amplifier voltage and current noise, as well as noise from internal resistors. 6 Supply current varies with supply voltage and temperature. See Figure 26 and Figur for e 28 details. 7 Unbalanced dual supplies can be used, such as −VS = −0.5 V and +VS = +2 V. The positive supply rail must be at least 2 V above the negative supply and reference voltage. Rev. C | Page 4 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION SHORT-CIRCUIT CURRENT ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION DC Performance AC Performance DRIVING THE AD8278 AND AD8279 INPUT VOLTAGE RANGE POWER SUPPLIES APPLICATIONS INFORMATION CONFIGURATIONS DIFFERENTIAL OUTPUT INSTRUMENTATION AMPLIFIER OUTLINE DIMENSIONS ORDERING GUIDE
AD8278/AD8279
VS = ±5 V to ±15 V, VREF = 0 V, TA = 25°C, RL = 10 kΩ connected to ground, G = 2 difference amplifier configuration, unless otherwise noted.
Table 3. G = 2 Grade B Grade A Parameter Conditions Min Typ Max Min Typ Max Unit
INPUT CHARACTERISTICS System Offset1 100 200 100 500 μV Over Temperature TA = −40°C to +85°C 200 500 μV vs. Power Supply VS = ±5 V to ±18 V 5 10 μV/V Average Temperature Coefficient TA = −40°C to +85°C 0.6 2 2 5 μV/°C Common-Mode VS = ±15 V, VCM = ±27 V, Rejection Ratio (RTI) RS = 0 Ω 86 80 dB Input Voltage Range2 −1.5 (VS + 0.1) +1.5 (VS − 1.5) −1.5 (VS + 0.1) +1.5 (VS − 1.5) V Impedance3 Differential 30 30 kΩ Common Mode 30 30 kΩ DYNAMIC PERFORMANCE Bandwidth 550 550 kHz Slew Rate 1.1 1.4 1.1 1.4 V/μs Channel Separation f = 1 kHz 130 130 dB Settling Time to 0.01% 10 V step on output, CL = 100 pF 10 10 μs Settling Time to 0.001% 11 11 μs GAIN Gain Error 0.005 0.02 0.01 0.05 % Gain Drift TA = −40°C to +85°C 1 5 ppm/°C Gain Nonlinearity VOUT = 20 V p-p 7 12 ppm OUTPUT CHARACTERISTICS Output Voltage Swing4 VS = ±15 V, RL = 10 kΩ, TA = −40°C to +85°C −VS + 0.2 +VS − 0.2 −VS + 0.2 +VS − 0.2 V Short-Circuit Current Limit ±15 ±15 mA Capacitive Load Drive 350 350 pF NOISE5 Output Voltage Noise f = 0.1 Hz to 10 Hz 2.8 2.8 μV p-p f = 1 kHz 90 95 90 95 nV/√Hz POWER SUPPLY6 AD8278 Supply Current 200 200 μA Over Temperature TA = −40°C to +85°C 250 250 μA AD8279 Supply Current 300 350 300 350 μA Over Temperature TA = −40°C to +85°C 400 400 μA Operating Voltage Range7 ±2 ±18 ±2 ±18 V TEMPERATURE RANGE Operating Range −40 +125 −40 +125 °C 1 Includes input bias and offset current errors, RTO (referred to output). 2 The input voltage range may also be limited by absolute maximum input voltage or by the output swing. See the Input Voltage Range section for details. 3 Internal resistors are trimmed to be ratio matched and have ±20% absolute accuracy. 4 Output voltage swing varies with supply voltage and temperature. See Figure 22 through Figure 25 for details. 5 Includes amplifier voltage and current noise, as well as noise from internal resistors. 6 Supply current varies with supply voltage and temperature. See Figure 26 and Figur for e 28 details. 7 Unbalanced dual supplies can be used, such as −VS = −0.5 V and +VS = +2 V. The positive supply rail must be at least 2 V above the negative supply and reference voltage. Rev. C | Page 4 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION SHORT-CIRCUIT CURRENT ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION DC Performance AC Performance DRIVING THE AD8278 AND AD8279 INPUT VOLTAGE RANGE POWER SUPPLIES APPLICATIONS INFORMATION CONFIGURATIONS DIFFERENTIAL OUTPUT INSTRUMENTATION AMPLIFIER OUTLINE DIMENSIONS ORDERING GUIDE