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ADC12L080 Arkusz danych(PDF) 6 Page - Texas Instruments |
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ADC12L080 Arkusz danych(HTML) 6 Page - Texas Instruments |
6 / 28 page ADC12L080 SNAS200A – OCTOBER 2004 – REVISED OCTOBER 2004 www.ti.com Converter Electrical Characteristics Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA = VD = +3.3V, VDR = +2.5V, PD = 0V, VREF = +1.0V external, VCM = 1.65V, RS < 100Ω, fCLK = 80 MHz, tr = tf = 2 ns, fIN = 70 MHz, CL = 15 pF/pin. Boldface limits apply for TJ = TMIN to TMAX: all other limits TJ = 25°C (1) (2) (3) (4) Typical Limits Units Symbol Parameter Conditions (4) (4) (Limits) STATIC CONVERTER CHARACTERISTICS Resolution with No Missing Codes 12 Bits 4.0 LSB (max) INL Integral Non Linearity Best Fit Method ±1.2 -3.3 LSB (min) 1.5 LSB (max) DNL Differential Non Linearity No missing codes ±0.4 -1.0 LSB (min) +5.7 %FS (max) Positive Error −0.15 -2 %FS (min) GE Gain Error +5 %FS (max) Negative Error +0.4 -3.7 %FS (min) Offset Error (VIN+ = VIN−) +1.7 +0.2 %FS (max) -0.6 Under Range Output Code 0 0 Over Range Output Code 4095 4095 REFERENCE AND ANALOG INPUT CHARACTERISTICS 0.5 V (min) VCM Common Mode Input Voltage 1.65 2.0 V (max) (CLK LOW) 8 pF VIN Input Capacitance CIN VIN = 1.0 Vdc + 1 VP-P (each pin to GND) (CLK HIGH) 7 pF 0.8 V (min) VREF Reference Voltage (5) 1.0 1.5 V (max) (1) The inputs are protected as shown below. Input voltages above VA or below GND will not damage this device, provided current is limited per (). However, errors in the A/D conversion can occur if the input goes above VA or below GND by more than 100 mV. As an example, if VA is 3.3V, the full-scale input voltage must be ≤3.4V to ensure accurate conversions. (2) To guarantee accuracy, it is required that |VA–VD| ≤ 100 mV and separate bypass capacitors are used at each power supply pin. (3) With the test condition for VREF = +1.0V (2 VP-P differential input), the 12-bit LSB is 488 µV. (4) Typical figures are at TA = TJ = 25°C, and represent most likely parametric norms. Test limits are guaranteed to National's AOQL (Average Outgoing Quality Level). (5) Optimum dynamic performance will be obtained by keeping the reference input in the 0.8V to 1.5V range. The LM4051CIM3-ADJ or the LM4051CIM3-1.2 band gap voltage reference is recommended for this application. 6 Submit Documentation Feedback Copyright © 2004, Texas Instruments Incorporated Product Folder Links: ADC12L080 |
Podobny numer części - ADC12L080_14 |
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Podobny opis - ADC12L080_14 |
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