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MP8820 Datasheet(PDF) 3 Page - Exar Corporation |
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MP8820 Datasheet(HTML) 3 Page - Exar Corporation |
3 / 12 page MP8820 3 Rev. 1.00 ELECTRICAL CHARACTERISTICS TABLE FOR DUAL SUPPLIES Unless Otherwise Noted: VDD = 5 V, GND = 0 V, VREF(+) = 1.5 V, VREF(–) = 0 V, VMID = 2.5 V. 25 °C Parameter Symbol Min Typ Max Units Test Conditions/Comments DC CHARACTERISTICS Resolution N 8 Bits Differential Non-Linearity DNL –1 +1/4 1 LSB Differential Non-Linearity2 DNL –1 +1/2 1 LSB @ VREF(+) – VREF(–) = 0.5 V Integral Non-Linearity7 INL –1 +1/2 1 LSB Integral Non-Linearity4, 7 INL –1 +1/2 1 LSB @ VREF(+) – VREF(–) = 0.5 V Monotonicity Guaranteed Bipolar Zero Error BZE –25 10 25 mV Offset is measured as the bipolar zero code transition, 01111111 to 10000000, relative to VMID Zero Scale Drift2, 5 ZSD 50 µV/°C Full Scale Error %FS This is a measure of the VMID to VRT +FSE –5.0 2.5 5.0 internal reference VMID to VRB –FSE –5.0 2.5 5.0 translation. Ideally VRT – VMID = VMID – VRB = VREF(+) – VREF(–) Full Scale Drift2, 6 FSD 0.025 %FS/ °C DC Input Range1 VINp-p 1 3 Vpp The analog input is specified as Vpp centered around VMID Aperture Delay tAP 50 ns From rising edge of WR Input Capacitance CIN 25 pF Measured with VIN – DC = 2.5 V and WR = low REFERENCE VOLTAGES Positive Reference Input Voltage VREF(+) 0.5 1.5 V Reference voltage with respect to VREF(–) VREF(+) Input Resistance RVR+ 1 M Ω Internal Reference Settling Time VRSTL 500 ns Settling time required for ADC to make a proper conversion after (VREF(+) – VREF(–)) has changed Negative Reference Input Voltage VREF(–) 0VREF(+) –0.5 V VREF(–) Input Resistance RVR– 1 K Ω VMID Input Current IVM 0mA VMID Range VMID 2 2.5 3 V VMID < VDD –0.5 – [VREF(+) – VREF(–)] VMID < VSS +0.5 + [VREF(–) – VREF(–)] POWER SUPPLIES All GNDs are Chip Substrate Positive Supply VDD 4.75 5 5.25 V Negative Supply GND 0 0 0 V Power Supply Rejection Ratio2 PSRR –48 dB f = 1 kHz. Not tested. Supply Current IDD 45 mA DIGITAL CHARACTERISTICS3, 4 Digital Input High Voltage VIH 4V Digital Input Low Voltage VIL 1V |
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