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ADMC300BST 데이터시트(PDF) 3 Page - Analog Devices |
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ADMC300BST 데이터시트(HTML) 3 Page - Analog Devices |
3 / 42 page –3– REV. B ADMC300 VOLTAGE REFERENCE Parameter Test Conditions Min Typ Max Unit VREF Voltage Level 2.25 2.75 V Source Current –100 µA Power Supply Rejection Ratio (PSRR) –5 5 mV/V Specifications subject to change without notice. PULSEWIDTH MODULATOR Parameter Test Conditions Min Typ Max Unit Counter Resolution1 16 Bits Edge Resolution Double Update Mode 40 ns TD Programmable Dead Time 0 81.84 µs Programmable Dead Time Increments 80 ns TMIN Programmable Pulse Deletion 0 40.92 µs Programmable Deletion Increments 40 ns fPWM PWM Frequency Range1 191 Hz TSYNC PWMSYNC Pulsewidth 0.04 10.24 µs fCHOP Gate Drive Chop Frequency 0.0244 6.25 MHz NOTES 1Resolution varies with PWM switching frequency, 191 Hz = 16 bits, 3.05 kHz = 12 bits, 48.8 kHz = 8 bits (12.5 MHz CLKIN) in single update mode. Specifications subject to change without notice. (VDD = AVDD = 5 V 10%, GND = AGND = 0 V, VREFIN = 2.50 V, TAMB = –40 C to +85 C, CLKIN = 12.5 MHz, unless otherwise noted) (VDD = AVDD = 5 V 10%, GND = AGND = 0 V, TAMB = –40 C to +85 C, CLKIN = 12.5 MHz, unless otherwise noted) (VDD = AVDD = 5 V 10%, GND = AGND = 0 V, TAMB = –40 C to +85 C, CLKIN = 12.5 MHz, unless otherwise noted) ANALOG-TO-DIGITAL CONVERTER Parameter Test Conditions Min Typ Max Unit Signal-to-Noise Ratio 1 (SNR) @VDD = 5.0 V, 72 76 dB Total Harmonic Distortion 1 (THD) @ fS = 32.55 kHz, –70 dB Common-Mode Rejection Ratio 2 (CMRR) @ fIN = 1.017 kHz, –82 dB Channel-Channel Crosstalk 3 ADCDIVn = 0x180, –76 dB Gain Error V1–V5 = 4.0 V p-p 5 % Gain V1N–V5N = VREFIN = 2.5 V 10,600 LSB/V VIN Analog Input Range 4 0VDD V VDIFF Analog Input Voltage (Differential) 4 VDD/2 V VOFFSET DC Offset Voltage 5 55 mV fMOD, MAX Maximum Sigma-Delta Modulator Rate ADCDIVA = 0x180 2.08 MHz ADCDIVB = 0x180 fS, MAX Maximum ADC Sample Rate 6 ADCDIVA = 0x180 32.55 kHz ADCDIVB = 0x180 VREFIN Reference Input Voltage 7 2.4 2.5 2.6 V RIN Equivalent Input Resistance 8 25 k Ω NOTES 1SNR measured with ADC channel configured in single-ended mode. SNR measurement does not include harmonic distortion, THD includes first six harmonics. The effective number of bits (ENOB) is related to the SNR by SNR = 6.02 (ENOB) +1.76 dB. Input signal filtered at 1.5 kHz. 2Input signal applied to both pins of input differential pair of ADC channel. 3Input signal applied to four ADC channels, dc applied to fifth, measurement taken at fifth ADC channel. 4Peak-peak input voltage in differential input configuration is half that in single-ended mode. 5This offset may be corrected for, using the ADC calibration feature. 6At maximum sigma-delta modulator rate of 2.08 MHz. 7Input reference pins: REFINA, REFINB. 8Analog signal input pins: V1–V5, V1N–V5N. Specifications subject to change without notice. |
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