Datasheet ADUCM355 (Analog Devices) - 9

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Data Sheet ADuCM355 Parameter Symbol Min Typ Max Unit Test Conditions/Comments
HPTIA RTIA Mismatch Error SE0, SE1, Error introduced when moving up or DE0, and DE11 down one RTIA value −3.5 +1 +3.5 % 160 kΩ to 5 kΩ range −2.5 ±2 +5 % 1 kΩ, 200 Ω, and 100 Ω HPTIA AMPLIFIER Bias Current 1 nA Maximum Current Sink and Source1 −3 +3 mA Ensure RTIA selection generates output voltage of less than ±900 mV with PGA gain = 1 Input Common-Mode Voltage Range1 300 AVDD − mV 700 Output Voltage Range1 200 AVDD − mV 400 Overcurrent Limit Protection1 17 mA Amplifier tries to limit source and sink current to this value via internal clamp, tested with RLOAD = 0 Ω, RTIA = 100 Ω Allowed Duration of Overcurrent 5 sec Limit1 Allowed Frequency of Overcurrent 1 Per Conditions1 hour Short-Circuit Current 30 mA When amplifier output is shorted to ground LOW POWER ON-CHIP VOLTAGE 2.5 V 0.47 μF from VREF_2.5V to AGND, REFERENCE reference is measured with all low power voltage DACs and output amplifiers enabled Accuracy ±5 mV TA = 25°C Noise1 60 μV p-p Peak-to-peak voltage in 0.1 Hz to 10 Hz range Reference Temperature Coefficient1, 6 −25 ±10 +25 ppm/°C DC Power Supply Rejection Ratio DC PSRR 70 dB DC variation due to AVDD supply changes AC Power Supply Rejection Ratio7 AC PSRR 48 dB AC 1 kHz, 50 mV peak-to-peak ripple applied to AVDD supply Long-Term Stability8 100 ppm/ 1000 hr HIGH POWER REFERENCES High Power On-Chip Voltage 1.82 V 4.7 μF from VREF_1.82V to AGND, reference Reference is measured with ADC enabled Accuracy ±5 mV TA = 25°C Reference Temperature Coefficient1, 2 −20 ±5 +20 ppm/°C DC Power Supply Rejection Ratio DC PSRR 85 dB DC variation due to AVDD supply changes AC Power Supply Rejection Ratio9 AC PSRR 60 dB AC 1 kHz, 50 mV peak-to-peak ripple applied to AVDD supply ADC Common Mode Reference 1.11 V 470 nF from ADCVBIAS_CAP to AGND, Source reference is measured with ADC enabled Accuracy ±5 mV TA = 25°C Reference Temperature Coefficient1 −20 ±5 +20 ppm/°C DC Power Supply Rejection Ratio DC PSRR 80 dB DC variation due to AVDD supply changes AC Power Supply Rejection Ratio AC PSRR 60 dB AC 1 kHz, 50 mV peak-to-peak ripple applied to AVDD supply Long-Term Stability 100 ppm/ 1000 hr Rev. C | Page 9 of 28 Document Outline FEATURES APPLICATIONS SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION SPECIFICATIONS MICROCONTROLLER ELECTRICAL SPECIFICATIONS RMS NOISE RESOLUTION OF ADC TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION RECOMMENDED CIRCUIT AND COMPONENT VALUES OUTLINE DIMENSIONS ORDERING GUIDE