Datasheet AD8209A (Analog Devices) - 3

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Data Sheet AD8209A SPECIFICATIONS
Operating temperature (TOPR) = −40°C to +125°C, TA = 25°C, VS = 5 V, RL = 25 kΩ (RL is the output load resistor), unless otherwise noted.
Table 1. Parameter Test Conditions/Comments Min Typ Max Unit
SYSTEM GAIN Initial 14 V/V Error vs. Temperature 0.075 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR ±0.15 % Gain Drift TOPR −5 ±15 ppm/°C VOLTAGE OFFSET Initial Input Offset (Referred to Input common-mode voltage (VCM) = 0.15 V, at TA ±1 ±2 mV Input (RTI)) Input Offset (RTI) over VCM = 0 V, TOPR ±4 mV Temperature Voltage Offset vs. Temperature VCM = 0 V, TOPR −20 +20 µV/°C INPUT Input Impedance Differential 360 400 440 kΩ Common Mode 180 200 220 kΩ VCM (Continuous) −2 +50 V CMRR1 VCM = −2 V to +50 V, dc 80 100 dB f = dc to 10 kHz,2 TOPR 80 dB PREAMPLIFIER (A1) Gain 7 V/V Gain Error 0.0375 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR −0.3 +0.3 % Output Voltage Range 0.025 VS − 0.1 V Output Resistance 97 100 103 kΩ OUTPUT BUFFER (A2) Gain 2 V/V Gain Error 0.075 V ≤ VOUT ≤ (VS − 0.1 V), dc, TOPR −0.3 +0.3 % Output Voltage Range3, 4 RL = 25 kΩ, differential input = 0 V, TOPR; Pin 3 (A1 output) 0.05 VS − 0.1 V driving Pin 4 (A2 input) Output Voltage Range5 Pin 4 (A2 input) driven with an external source 0.05 VS − 0.1 V Input Bias Current TOPR 50 nA Output Resistance RL = 1 kΩ, frequency = dc 2 Ω DYNAMIC RESPONSE System Bandwidth VIN = 0.01 V p-p, VOUT = 0.14 V p-p 100 kHz Slew Rate VIN = 0.28 V, VOUT = 4 V step 1 V/µs NOISE 0.1 Hz to 10 Hz 20 µV p-p Spectral Density, 1 kHz (RTI) 500 nV/√Hz POWER SUPPLY Operating Range 4.5 5.5 V Quiescent Current Typical at TA 1.6 mA Quiescent Current vs. Temperature VOUT = 0.1 V dc, VS = 5 V, TOPR 2.7 mA Power Supply Rejection Ratio VS = 4.5 V to 5.5 V, TOPR 70 80 dB (PSRR) TEMPERATURE RANGE For specified performance at TOPR −40 +125 °C 1 Source imbalance < 2 Ω. 2 The AD8209A preamplifier exceeds 80 dB CMRR at 10 kHz. However, because the output is available only via the 100 kΩ resistor, even a small amount of pin to pin capacitance between the ±IN pins and the A1 and A2 pins can couple an input common-mode signal larger than the greatly attenuated preamplifier output. The effect of pin to pin coupling can be neglected in all applications by using a filter capacitor from Pin 3 to GND. 3 The output voltage range of the AD8209A varies depending on the load resistance and temperature. For additional information on this specification, refer to Figure 12 and Figure 13. 4 The output voltage range of A2 assumes that Pin 3 (A1 output) and Pin 4 (A2 input) are shorted together. A 25 kΩ load resistor is used for testing. 5 The output voltage range of A2 assumes Pin 4 (A2 input) is driven with an external voltage source. A 25 kΩ load resistor is used for testing. Rev. A | Page 3 of 15 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION HIGH-SIDE CURRENT SENSINGWITH A LOW-SIDE SWITCH HIGH RAIL CURRENT SENSING LOW-SIDE CURRENT SENSING 4 mA to 20 mA Current Loop Receiver GAIN ADJUSTMENT Gains Less than 14 Gains Greater than 14 GAIN TRIM Internal Signal Overload Considerations LOW-PASS FILTERING HIGH LINE CURRENT SENSING WITH LOW-PASS FILTERING AND GAIN ADJUSTMENT OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS