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ADC08831 データシート(PDF) 3 Page - Texas Instruments |
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ADC08831 データシート(HTML) 3 Page - Texas Instruments |
3 / 32 page ADC08831, ADC08832 www.ti.com SNAS015C – SEPTEMBER 1999 – REVISED MARCH 2013 Electrical Characteristics The following specifications apply for VCC = VREF = +5VDC, and fCLK = 2 MHz unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Symbol Parameter Conditions Typical(1) Limits(2) Units (Limits) CONVERTER AND MULTIPLEXER CHARACTERISTICS TUE Total Unadjusted Error See(3) ±0.3 ±1 LSB (max) Offset Error ±0.2 LSB DNL Differential NonLinearity ±0.2 LSB INL Integral NonLinearity ±0.2 LSB FS Full Scale Error ±0.3 LSB RREF Reference Input Resistance See(4) 3.5 2.8 k Ω (min) 5.9 k Ω (max) VIN Analog Input Voltage See(5) (VCC + 0.05) V (max) (GND − 0.05) V (min) DC Common-Mode Error ±¼ LSB (max) Power Supply Sensitivity VCC = 5V ±10%, ±¼ LSB (max) VCC = 5V ±5% ±¼ LSB (max) On Channel Leakage Current(6) On Channel = 5V, 0.2 μA (max) Off Channel = 0V 1 On Channel = 0V −0.2 μA (min) Off Channel = 5V −1 Off Channel Leakage Current(7) On Channel = 5V, Off −0.2 μA (min) Channel = 0V −1 On Channel = 0V, 0.2 μA (max) Off Channel = 5V 1 DC CHARACTERISTICS VIN(1) Logical “1” Input Voltage 2.0 V (min) VIN(0) Logical “0” Input Voltage 0.8 V (max) IIN(1) Logical “1” Input Current VIN = 5.0V 0.05 +1 μA (max) IIN(0) Logical “0” Input Current VIN = 0V 0.05 −1 μA (max) VOUT(1) Logical “1” Output Voltage VCC = 4.75V: IOUT = −360 μA 2.4 V (min) IOUT = −10 μA 4.5 V (min) VOUT(0) Logical “0” Output Voltage VCC = 4.75V 0.4 V (max) IOUT = 1.6 mA (1) Typicals are at TJ = 25°C and represent the most likely parametric norm. (2) Specified to TI's AOQL (Average Outgoing Quality Level). (3) Total Unadjusted Error (TUE) includes offset, full-scale, linearity, multiplexer errors. (4) It is not tested for the ADC08832. (5) For VIN(−) ≥ VIN(+) the digital code will be 0000 0000. Two on-chip diodes are tied to each analog input (see ADC08832 Functional Block Diagram) which will forward-conduct for analog input voltages one diode drop below ground or one diode drop greater than VCC supply. During testing at low VCC levels (e.g., 4.5V), high level analog inputs (e.g., 5V) can cause an input diode to conduct, especially at elevated temperatures, which will cause errors for analog inputs near full-scale. The spec allows 50 mV forward bias of either diode; this means that as long as the analog VIN does not exceed the supply voltage by more than 50 mV, the output code will be correct. Exceeding this range on an unselected channel will corrupt the reading of a selected channel. Achievement of an absolute 0 VDC to 5 VDC input voltage range will therefore require a minimum supply voltage of 4.950 VDC over temperature variations, initial tolerance and loading. (6) Channel leakage current is measured after a single-ended channel is selected and the clock is turned off. For off channel leakage current the following two cases are considered: one, with the selected channel tied high (5 VDC) and the remaining off channel tied low (0 VDC), total current flow through the off channel is measured; two, with the selected channel tied low and the off channels tied high, total current flow through the off channel is again measured. The two cases considered for determining on channel leakage current are the same except total current flow through the selected channel is measured. (7) Channel leakage current is measured after a single-ended channel is selected and the clock is turned off. For off channel leakage current the following two cases are considered: one, with the selected channel tied high (5 VDC) and the remaining off channel tied low (0 VDC), total current flow through the off channel is measured; two, with the selected channel tied low and the off channels tied high, total current flow through the off channel is again measured. The two cases considered for determining on channel leakage current are the same except total current flow through the selected channel is measured. Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: ADC08831 ADC08832 |
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同様の説明 - ADC08831 |
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