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ADC12DL066 bảng dữ liệu(PDF) 7 Page - Texas Instruments |
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ADC12DL066 bảng dữ liệu(HTML) 7 Page - Texas Instruments |
7 / 31 page ADC12DL066 www.ti.com SNAS188F – MAY 2004 – REVISED FEBRUARY 2008 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, INT/EXT REF pin = +3.3V, VREF = +1.0V, fCLK = 66 MHz, fIN = 10 MHz, tr = tf = 2 ns, CL = 15 pF/pin. Boldface limits apply for TJ = TMIN to TMAX: all other limits TJ = 25°C (1) (2) (3) Typical Limits Units Symbol Parameter Conditions (4) (4) (Limits) STATIC CONVERTER CHARACTERISTICS Resolution with No Missing Codes 12 Bits (min) INL Integral Non Linearity (5) ±1.2 ±3.0 LSB (max) DNL Differential Non Linearity ±0.5 ±1.0 LSB (max) PGE Positive Gain Error ±0.2 ±3.6 %FS (max) NGE Negative gain Error ±0.2 ±3.6 %FS (max) TC GE Gain Error Tempco −40°C ≤ TA ≤ +85°C −60 ppm/°C +1.3 %FS (max) VOFF Offset Error (VIN+ = VIN−) 0.18 -0.9 %FS (min) TC VOFF Offset Error Tempco −40°C ≤ TA ≤ +85°C −2.4 ppm/°C 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 1.0 1.5 V (max) (CLK LOW) 8 pF CIN VIN Input Capacitance (each pin to GND) VIN = 2.5 Vdc + 0.7 Vrms (CLK HIGH) 7 pF 0.8 V (min) VREF External Reference Voltage (6) 1.00 1.5 V (max) RREF Reference Input Resistance 100 M Ω (min) DYNAMIC CONVERTER CHARACTERISTICS FPBW Full Power Bandwidth 0 dBFS Input, Output at −3 dB 450 MHz fIN = 1 MHz, VIN = −0.5 dBFS 66 dB fIN = 10 MHz, VIN = −0.5 dBFS 66 64 dB (min) SNR Signal-to-Noise Ratio fIN = 33 MHz, VIN = −0.5 dBFS 64 dB fIN = 146 MHz, VIN = −0.5 dBFS 55 dB (1) The inputs are protected as shown below. Input voltage magnitudes 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 (2VP-P differential input), the 12-bit LSB is 488 µV. (4) Typical figures are at TJ = 25°C, and represent most likely parametric norms. Test limits are guaranteed to National's AOQL (Average Outgoing Quality Level). (5) Integral Non Linearity is defined as the deviation of the analog value, expressed in LSBs, from the straight line that passes through positive and negative full-scale. (6) Optimum performance will be obtained by keeping the reference input in the 0.8V to 1.5V range. The LM4051CIM3-ADJ (SOT-23 package) is recommended for external reference applications. Copyright © 2004–2008, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: ADC12DL066 |
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Mô tả tương tự - ADC12DL066_14 |
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