Datasheet AD8203 (Analog Devices) - 3

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Data Sheet AD8203 SPECIFICATIONS SINGLE SUPPLY
TOPR = operating temperature range, VS = 5 V, unless otherwise noted, RTI = referred to input, VCM = common-mode voltage.
Table 1. AD8203 SOIC AD8203 MSOP Parameter Conditions Min Typ Max Min Typ Max Unit
SYSTEM GAIN Initial 14 14 V/V Error vs. Temperature 0.04 ≤ VOUT ≤ 4.8 V dc, TOPR ±0.3 ±0.3 % Gain Drift TOPR ±20 ±20 ppm/°C VOLTAGE OFFSET Initial Input Offset (RTI), TOPR ±2 ±2 Offset vs. Temperature VCM = 0V, TOPR ±10 ±15 µV/°C INPUT Input Impedance Differential 260 320 380 260 320 380 kΩ Common Mode 130 160 190 130 160 190 kΩ CMV Continuous −6 +30 −6 +30 V CMRR1 VCM = −6 V to +30 V f = dc to 1 kHz 82 82 dB f = 10 kHz2 80 80 dB PREAMPLIFIER Gain 7 7 V/V Gain Error ±0.3 ±0.3 % Output Voltage Range 0.02 4.8 0.02 4.8 V Output Resistance 97 100 103 97 100 103 kΩ OUTPUT BUFFER Gain 2 2 V/V Gain Error 0.04 ≤ VOUT ≤ 4.8 V dc, TOPR ±0.3 ±0.3 % Output Voltage Range3 0.04 4.8 0.04 4.8 V Input Bias Current 40 40 nA Output Resistance 2 2 Ω DYNAMIC RESPONSE System Bandwidth VIN = 0.01 V p-p, VOUT = 0.14 V p-p 40 60 40 60 kHz Slew Rate VIN = 0.28 V, VOUT = 4 V step 0.33 0.33 V/µs NOISE 0.1 Hz to 10 Hz 10 10 µV p-p Spectral Density, 1 kHz (RTI) 300 300 nV/√Hz POWER SUPPLY Operating Range 3.5 12 3.5 12 V Quiescent Current vs. VO = 0.1 V dc 0.25 1.0 0.25 1.0 mA Temperature PSRR VS = 3.5 V to 12 V 75 83 75 83 dB TEMPERATURE RANGE For Specified Performance −40 +125 −40 +125 °C 1 Source imbalance <2 Ω. 2 The AD8203 preamplifier exceeds 80 dB CMRR at 10 kHz. However, since the signal is available only by way of a 100 kΩ resistor, even the small amount of pin-to-pin capacitance between Pin 1, Pin 8 and Pin 3, Pin 4 may couple an input common-mode signal larger than the greatly attenuated preamplifier output. The effect of pin- to-pin coupling may be neglected in all applications by using filter capacitors at Node 3. 3 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 used for testing. Rev. D | Page 3 of 20 Document Outline Features Applications Functional Block Diagrams Revision History Specifications Single Supply Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Current Sensing High Line, High Current Sensing Low Current Sensing Gain Adjustment Gains Less Than 14 Gains Greater Than 14 Gain Trim Internal Signal Overload Considerations Low-Pass Filtering High Line Current Sensing with LPF and Gain Adjustment Driving Charge Redistribution ADCs Outline Dimensions Ordering Guide