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AD7887BRZ-REEL7 Arkusz danych(PDF) 4 Page - Analog Devices |
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AD7887BRZ-REEL7 Arkusz danych(HTML) 4 Page - Analog Devices |
4 / 25 page Data Sheet AD7887 SPECIFICATIONS VDD = 2.7 V to 5.25 V, VREF = 2.5 V, external/internal reference unless otherwise noted, fSCLK = 2 MHz, TA = TMIN to TMAX, unless otherwise noted. Table 1. Parameter AVersion1 BVersion1 Unit Test Conditions/Comments DYNAMIC PERFORMANCE Signal to Noise + Distortion Ratio (SNR)2, 3 71 71 dB typ fIN = 10 kHz sine wave, fSAMPLE = 125 kSPS Total Harmonic Distortion (THD)2 −80 −80 dB typ fIN = 10 kHz sine wave, fSAMPLE = 125 kSPS Peak Harmonic or Spurious Noise2 –80 −80 dB typ fIN = 10 kHz sine wave, fSAMPLE = 125 kSPS Intermodulation Distortion (IMD)2 Second-Order Terms −80 −80 dB typ fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 125 kSPS Third-Order Terms −80 −80 dB typ fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 125 kSPS Channel-to-Channel Isolation2 −80 −80 dB typ fIN = 25 kHz Full-Power Bandwidth 2.5 2.5 MHz typ @ 3 dB DC ACCURACY Any channel Resolution 12 12 Bits Integral Nonlinearity2 ±2 ±1 LSB max Differential Nonlinearity2 ±2 ±1 LSB max Guaranteed no missing codes to 11 bits (A Grade) Offset Error2 ±3 ±3 LSB max VDD = 5 V, dual-channel mode ±4 ±4 LSB max VDD = 3 V, dual-channel mode ±6 ±6 LSB typ Single-channel mode Offset Error Match2 0.5 0.5 LSB max Gain Error2 ±2 ±2 LSB max Dual-channel mode ±1 ±1 LSB max Single-channel mode, external reference ±6 ±6 LSB typ Single-channel mode, internal reference Gain Error Match2 2 2 LSB max ANALOG INPUT Input Voltage Ranges 0 to VREF 0 to VREF V Leakage Current ±5 ±5 μA max Input Capacitance 20 20 pF typ REFERENCE INPUT/OUTPUT REFIN Input Voltage Range 2.5/VDD 2.5/VDD V min/max Functional from 1.2 V Input Impedance 10 10 kΩ typ Very high impedance if internal reference disabled REFOUT Output Voltage 2.45/2.55 2.45/2.55 V min/max REFOUT Temperature Coefficient ±50 ±50 ppm/°C typ LOGIC INPUTS Input High Voltage, VINH 2.4 2.4 V min VDD = 4.75 V to 5.25 V 2.1 2.1 V min VDD = 2.7 V to 3.6 V Input Low Voltage, VINL 0.8 0.8 V max VDD = 2.7 V to 5.25 V Input Current, IIN ±1 ±1 μA max Typically 10 nA, VIN = 0 V or VDD Input Capacitance, CIN4 10 10 pF max LOGIC OUTPUTS Output High Voltage, VOH ISOURCE = 200 μA VDD − 0.5 VDD − 0.5 V min VDD = 2.7 V to 5.25 V Output Low Voltage, VOL 0.4 0.4 V max ISINK = 200 μA Floating-State Leakage Current ±1 ±1 μA max Floating-State Output Capacitance5 10 10 pF max Output Coding Straight (Natural) Binary Rev. E | Page 3 of 24 |
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