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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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AFE4490 Datenblatt(PDF) 5 Page - Texas Instruments |
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AFE4490 Datenblatt(HTML) 5 Page - Texas Instruments |
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5 / 70 page  AFE4490 www.ti.com SBAS602B – DECEMBER 2012 – REVISED FEBRUARY 2013 ELECTRICAL CHARACTERISTICS (continued) Minimum and maximum specifications are at TA = –40°C to +85°C. Typical specifications are at +25°C. All specifications are at RX_ANA_SUP = RX_DIG_SUP = 3 V, TX_CTRL_SUP = LED_DRV_SUP = 5 V, and fCLK = 8 MHz, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT AMBIENT CANCELLATION STAGE G Gain 1, 1.5, 2, 3, and 4 V/V Current DAC range 0 10 µA Current DAC step size 1 µA LOW-PASS FILTER Low-pass corner frequency 3-dB attenuation 0.5 and 1 kHz Duty cycle = 25% 0.004 dB Pass-band attenuation, 2 Hz to 10 Hz Duty cycle = 10% 0.041 dB ANALOG-TO-DIGITAL CONVERTER Resolution 22 Bits See the ADC Operation and Averaging Sample rate 4 × PRF SPS Module section ADC full-scale voltage ±1.2 V See the ADC Operation and Averaging ADC conversion time 50 PRF / 4 µs Module section ADC reset time 2 tCLK TRANSMITTER 0, 50, 75, 100, 150, and 200 Output current range (see the LEDCNTRL: LED Control mA Register for details) LED current DAC error ±5% Output current resolution 8 Bits At 25-mA output current 110 dB Transmitter noise dynamic range, over 0.1-Hz to 5-Hz bandwidth At 100-mA output current 110 dB Minimum sample time of LED1 and LED2 50 µs pulses LED_ON = 0 1 µA LED current DAC leakage current LED_ON = 1 50 µA LED current DAC linearity Percent of full-scale current 0.5% From zero current to 150 mA 7 µs Output current settling time (with resistive load) From 150 mA to zero current 7 µs DIAGNOSTICS EN_SLOW_DIAG = 0 Start of diagnostics after the DIAG_EN register bit is set. 8 ms End of diagnostic indicated by DIAG_END going high. Duration of diagnostics state machine EN_SLOW_DIAG = 1 Start of diagnostics after the DIAG_EN register bit is set. 16 ms End of diagnostic indicated by DIAG_END going high. Open fault resistance > 100 k Ω Short fault resistance < 10 k Ω Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: AFE4490 |
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