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ADPD4000 Datasheet(PDF) 4 Page - Analog Devices |
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ADPD4000 Datasheet(HTML) 4 Page - Analog Devices |
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4 / 82 page  ADPD4000/ADPD4001 Data Sheet Rev. A | Page 4 of 82 Parameter Test Conditions/Comments Min Typ Max Unit 32 MHz Oscillator Percent Variation from 25°C to 85°C 2 % Percent Variation from +25°C to −40°C −2 % 1 Minimum LED period = (2 × AFE width) + 2 µs. 2 The maximum value in this specification is the internal ADC sampling rate using the internal 1 MHz state machine clock. The I2C and SPI read rates in some configurations may limit the ODR. Table 4. Parameter Test Conditions/Comments Min Typ Max Unit TRANSIMPEDANCE AMPLIFIER (TIA) GAIN 12.5 200 kΩ PULSED SIGNAL CONVERSIONS, 3 μs LED PULSE 4 μs integration width, single integration mode ADC Resolution1 TIA feedback resistor 12.5 kΩ 6.2 nA/LSB 25 kΩ 3.1 nA/LSB 50 kΩ 1.5 nA/LSB 100 kΩ 0.77 nA/LSB 200 kΩ 0.38 nA/LSB ADC Saturation Level2 TIA feedback resistor 12.5 kΩ 50 μA 25 kΩ 25 μA 50 kΩ 12.5 μA 100 kΩ 6.22 μA 200 kΩ 3.11 μA PULSED SIGNAL CONVERSIONS, 2 μs LED PULSE 3 μs integration width, single integration mode ADC Resolution1 TIA feedback resistor 12.5 kΩ 8.2 nA/LSB 25 kΩ 4.1 nA/LSB 50 kΩ 2.04 nA/LSB 100 kΩ 1.02 nA/LSB 200 kΩ 0.51 nA/LSB ADC Saturation Level2 TIA feedback resistor 12.5 kΩ 67 μA 25 kΩ 33 μA 50 kΩ 16.7 μA 100 kΩ 8.37 μA 200 kΩ 4.19 μA FULL SIGNAL CONVERSIONS TIA Linear Dynamic Range (per Channel) Total input current, 1% compression point, TIA_VREF = 1.265 V 12.5 kΩ 72 μA 25 kΩ 38 μA 50 kΩ 18.7 μA 100 kΩ 9.3 μA 200 kΩ 4.6 μA SYSTEM PERFORMANCE Referred to Input Noise Single integration mode, single pulse, single channel, floating input, TIA_VREF = 0.9 V, 4 μs integration time 12.5 kΩ TIA gain 6.8 nA rms 25 kΩ TIA gain 3.4 nA rms 50 kΩ TIA gain 1.6 nA rms 100 kΩ TIA gain 0.9 nA rms 200 kΩ TIA gain 0.5 nA rms |
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