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ADC0808-N Datasheet(PDF) 3 Page - Texas Instruments |
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ADC0808-N Datasheet(HTML) 3 Page - Texas Instruments |
3 / 20 page ADC0808-N, ADC0809-N www.ti.com SNAS535H – OCTOBER 1999 – REVISED MARCH 2013 Electrical Characteristics – Converter Specifications (continued) Converter Specifications: VCC=5 VDC=VREF+, VREF(−)=GND, TMIN≤TA≤TMAX and fCLK=640 kHz unless otherwise stated. Symbol Parameter Conditions Min Typ Max Units ADC0809 0°C to 70°C ±1 LSB Total Unadjusted Error(1) TMIN to TMAX ±1¼ LSB Input Resistance From Ref(+) to Ref( −) 1.0 2.5 k Ω Analog Input Voltage Range See (2) V(+) or V( −) GND − 0.1 VCC + 0.1 VDC VREF(+) Voltage, Top of Ladder Measured at Ref(+) VCC VCC + 0.1 V Voltage, Center of Ladder (VCC/2) − 0.1 VCC/2 (VCC/2) + 0.1 V VREF(−) Voltage, Bottom of Ladder Measured at Ref( −) −0.1 0 V IIN Comparator Input Current fc=640 kHz, (3) −2 ±0.5 2 μA (2) Two on-chip diodes are tied to each analog input which will forward conduct for analog input voltages one diode drop below ground or one diode drop greater than the VCCn supply. The spec allows 100 mV forward bias of either diode. This means that as long as the analog VIN does not exceed the supply voltage by more than 100 mV, the output code will be correct. To achieve an absolute 0VDC to 5VDC input voltage range will therefore require a minimum supply voltage of 4.900 VDC over temperature variations, initial tolerance and loading. (3) Comparator input current is a bias current into or out of the chopper stabilized comparator. The bias current varies directly with clock frequency and has little temperature dependence (Figure 8). See ANALOG COMPARATOR INPUTS Electrical Characteristics – Digital Levels and DC Specifications Digital Levels and DC Specifications: ADC0808CCN, ADC0808CCV, ADC0809CCN and ADC0809CCV, 4.75 ≤VCC≤5.25V, −40°C≤TA≤+85°C unless otherwise noted Symbol Parameter Conditions Min Typ Max Units ANALOG MULTIPLEXER VCC=5V, VIN=5V, IOFF(+) OFF Channel Leakage Current TA=25°C 10 200 nA TMIN to TMAX 1.0 μA VCC=5V, VIN=0, IOFF(−) OFF Channel Leakage Current TA=25°C −200 −10 nA TMIN to TMAX −1.0 μA CONTROL INPUTS VIN(1) Logical “1” Input Voltage (VCC − 1.5) V VIN(0) Logical “0” Input Voltage 1.5 V Logical “1” Input Current (The Control IIN(1) VIN=15V 1.0 μA Inputs) Logical “0” Input Current (The Control IIN(0) VIN=0 −1.0 μA Inputs) ICC Supply Current fCLK=640 kHz 0.3 3.0 mA DATA OUTPUTS AND EOC (INTERRUPT) VCC = 4.75V VOUT(1) Logical “1” Output Voltage IOUT = −360µA 2.4 V IOUT = −10µA 4.5 V VOUT(0) Logical “0” Output Voltage IO=1.6 mA 0.45 V VOUT(0) Logical “0” Output Voltage EOC IO=1.2 mA 0.45 V VO=5V 3 μA IOUT TRI-STATE Output Current VO=0 −3 μA Electrical Characteristics – Timing Specifications Timing Specifications VCC=VREF(+)=5V, VREF(−)=GND, tr=tf=20 ns and TA=25°C unless otherwise noted. Symbol Parameter Conditions MIn Typ Max Units tSTCLK Start Time Delay from Clock (Figure 7) 300 900 ns Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: ADC0808-N ADC0809-N |
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