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ADC0838CCWM Datenblatt(PDF) 6 Page - Texas Instruments |
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ADC0838CCWM Datenblatt(HTML) 6 Page - Texas Instruments |
6 / 40 page ADC0831-N, ADC0832-N, ADC0834-N, ADC0838-N SNAS531B – AUGUST 1999 – REVISED MARCH 2013 www.ti.com AC Characteristics The following specifications apply for VCC = 5V, tr = tf = 20 ns and 25°C unless otherwise specified. Tested Design Limit Parameter Conditions Typ(1) Limit(2) Limit(3) Units Min 10 kHz fCLK, Clock Frequency Max 400 kHz tC, Conversion Time Not including MUX Addressing Time 8 1/fCLK Min 40 % Clock Duty Cycle(4) Max 60 % tSET-UP, CS Falling Edge or Data Input Valid 250 ns to CLK Rising Edge tHOLD, Data Input Valid after CLK Rising 90 ns Edge CL=100 pF tpd1, tpd0—CLK Falling Edge to Output Data Data MSB First 650 1500 ns Valid(5) Data LSB First 250 600 ns CL=10 pF, RL=10k (See TRI-STATE 125 250 ns t1H, t0H,—Rising Edge of CS to Data Output Test Circuits and Waveforms) and SARS Hi–Z CL=100 pf, RL=2k 500 ns CIN, Capacitance of Logic Input 5 pF COUT, Capacitance of Logic Outputs 5 pF (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) A 40% to 60% clock duty cycle range insures proper operation at all clock frequencies. In the case that an available clock has a duty cycle outside of these limits, the minimum, time the clock is high or the minimum time the clock is low must be at least 1 μs. The maximum time the clock can be high is 60 μs. The clock can be stopped when low so long as the analog input voltage remains stable. (5) Since data, MSB first, is the output of the comparator used in the successive approximation loop, an additional delay is built in (see ADC0838-N Functional Block Diagram) to allow for comparator response time. 6 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: ADC0831-N ADC0832-N ADC0834-N ADC0838-N |
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