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ADS1205 bảng dữ liệu(PDF) 3 Page - Texas Instruments |
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ADS1205 bảng dữ liệu(HTML) 3 Page - Texas Instruments |
3 / 22 page ADS1205 SBAS312A − JANUARY 2005 − REVISED APRIL 2005 www.ti.com 3 ELECTRICAL CHARACTERISTICS Over recommended operating free-air temperature range at −40 °C to +85°C, AVDD = 5V, BVDD = 3V, CH x+ = 0.5V to 4.5V, CH x− = 2.5V, REFIN = REFOUT = internal +2.5V, CLKIN = 20MHz, and 16-bit Sinc3 filter with decimation by 256, unless otherwise noted. ADS1205I PARAMETER TEST CONDITIONS MIN TYP(1) MAX UNITS Resolution 16 Bits DC Accuracy INL Integral linearity error(2) −1.4 ±3 LSB INL Integral linearity error(2) −0.002 ±0.005 % FSR Integral linearity match 6 LSB Integral linearity match 0.009 % FSR DNL Differential nonlinearity(3) ±1 LSB VOS Input offset error(4) −1.2 ±3 mV Input offset error match 0.1 2 mV TCVOS Input offset error drift 1.1 8 µV/°C GERR Gain error(4) Referenced to VREF −0.01 ±0.5 % FSR Gain error match 0.09 0.5 % FSR TCGERR Gain error drift 1.3 ppm/ °C PSRR Power-supply rejection ratio 4.75V < AVDD < 5.25V 78 dB Analog Input FSR Full-scale differential range (CH x+) − (CH x−); CH x− = 2.5V ±2.5 V Specified differential range (CH x+) − (CH x−); CH x− = 2.5V ±2 V Maximum operating input range(3) 0 AVDD V Input capacitance Common-mode 3 pF Input leakage current CLK turned off ±1 nA Differential input resistance 100 k Ω Differential input capacitance 2.5 pF CMRR Common-mode rejection ratio At DC 108 dB CMRR Common-mode rejection ratio VIN = ±1.25VPP at 40kHz 117 dB BW Bandwidth FS sine wave, −3dB 50 MHz Sampling Dynamics Internal clock frequency CLKSEL = 1 8 9.8 12 MHz CLKIN External clock frequency(5) CLKSEL = 0 1 20 24 MHz AC Accuracy THD Total harmonic distortion VIN = ±2VPP at 5kHz −96.6 −88 dB SFDR Spurious-free dynamic range VIN = ±2VPP at 5kHz 92 98 dB SNR Signal-to-noise ratio VIN = ±2VPP at 5kHz 86 88.9 dB SINAD Signal-to-noise + distortion VIN = ±2VPP at 5kHz 85 88.2 dB Channel-to-channel isolation(3) VIN = ±2VPP at 50kHz 100 dB ENOB Effective number of bits 14 14.5 Bits (1) All typical values are at TA = +25°C. (2) Integral nonlinearity is defined as the maximum deviation of the line through the end points of the specified input range of the transfer curve for CH x+ = −2V to +2V at 2.5V, expressed either as the number of LSBs or as a percent of measured input range (4V). (3) Ensured by design. (4) Maximum values, including temperature drift, are ensured over the full specified temperature range. (5) With reduced accuracy, the clock frequency can go from 1MHz to 33MHz. (6) Applicable for 5.0V nominal supply: BVDD (min) = 4.5V and BVDD (max) = 5.5V. (7) Applicable for 3.0V nominal supply: BVDD (min) = 2.7V and BVDD (max) = 3.6V. |
Số phần tương tự - ADS1205 |
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Mô tả tương tự - ADS1205 |
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