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ADC0834CCWM датащи(PDF) 4 Page - Texas Instruments |
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ADC0834CCWM датащи(HTML) 4 Page - Texas Instruments |
4 / 40 page ADC0831-N, ADC0832-N, ADC0834-N, ADC0838-N SNAS531B – AUGUST 1999 – REVISED MARCH 2013 www.ti.com Converter and Multiplexer Electrical Characteristics The following specifications apply for VCC = V+ = VREF = 5V, VREF ≤ VCC +0.1V, TA = Tj = 25°C, and fCLK = 250 kHz unless otherwise specified. Boldface limits apply from TMIN to TMAX. BCV, CCV, CCWM, BCN CIWM Devices and CCN Devices Parameter Conditions Units Tested Design Tested Design Typ(1) Typ(1) Limit(2) Limit(3) Limit(2) Limit(3) CONVERTER AND MULTIPLEXER CHARACTERISTICS ADC0838BCV ±½ ±½ ADC0834BCN ±½ ±½ Total ADC0838CCV ±1 ±1 Unadjusted VREF = 5.00 V (4) LSB (Max) ADC0831/2/4/8CCN ±1 ±1 Error ADC0831/2/4/8CCWM ±1 ±1 ADC0832/8CIWM ±1 Minimum Reference Input 3.5 1.3 3.5 1.3 1.3 k Ω Resistance(5) Maximum Reference Input 3.5 5.9 3.5 5.4 5.9 k Ω Resistance(5) Maximum Common-Mode Input VCC VCC VCC+0.05 V Range(6) +0.05 +0.05 Minimum Common-Mode Input GND GND GND V Range(6) −0.05 −0.05 −0.05 DC Common-Mode Error ±1/16 ±¼ ±1/16 ±¼ ±¼ LSB 15 mA into V+, VCC = Change in zero error from VCC=5V N.C., 1 1 1 LSB to internal zener operation(7) VREF = 5V VZ, internal diode MIN 15 mA into V+ 6.3 6.3 6.3 breakdown (at V+)(7) MAX 8.5 8.5 8.5 V Power Supply Sensitivity VCC = 5V ± 5% ±1/16 ±¼ ±¼ ±1/16 ±¼ ±¼ LSB On Channel = 5V −0.2 −0.2 −1 μA Off Channel = 0V −1 IOFF, Off Channel Leakage Current(8) On Channel = 0V +0.2 +0.2 +1 μA Off Channel = 5V +1 On Channel = 0V −0.2 −0.2 −1 μA Off Channel = 5V −1 ION, On Channel Leakage Current (8) On Channel = 5V +0.2 +0.2 +1 μA Off Channel = 0V +1 (1) Typicals are at 25°C and represent most likely parametric norm. (2) Tested limits are ensured to TI's AOQL (Average Outgoing Quality Level). (3) Ensured but not 100% production tested. These limits are not used to calculate outgoing quality levels. (4) Total unadjusted error includes offset, full-scale, linearity, and multiplexer errors. (5) Cannot be tested for ADC0832-N. (6) For VIN(−) ≥ VIN(+) the digital output code will be 0000 0000. Two on-chip diodes are tied to each analog input (see Functional Block Diagram) which will forward conduct for analog input voltages one diode drop below ground or one diode drop greater than the VCC supply. Be careful, during testing at low VCC levels (4.5V), as high level analog inputs (5V) can cause this input diode to conduct—especially at elevated temperatures, and 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 or VREF does not exceed the supply voltage by more than 50 mV, the output code will be correct. To achieve 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. (7) Internal zener diodes (6.3 to 8.5V) are connected from V+ to GND and VCC to GND. The zener at V+ can operate as a shunt regulator and is connected to VCC via a conventional diode. Since the zener voltage equals the A/D's breakdown voltage, the diode insures that VCC will be below breakdown when the device is powered from V+. Functionality is therefore ensured for V+ operation even though the resultant voltage at VCC may exceed the specified Absolute Max of 6.5V. It is recommended that a resistor be used to limit the max current into V+. (See Figure 24 in Functional Description) (8) Leakage current is measured with the clock not switching. 4 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: ADC0831-N ADC0832-N ADC0834-N ADC0838-N |
Аналогичный номер детали - ADC0834CCWM |
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Аналогичное описание - ADC0834CCWM |
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