ADC12D040

Manufacturer Part NumberADC12D040
ManufacturerTexas Instruments
ADC12D040 datasheet
 


Specifications of ADC12D040

Resolution(bits)12Sample Rate (max)(sps)40MSPS
# Input Channels2Snr(db)68
Sfdr(db)80Power Consumption(typ)(mw)600
Analog Voltage Av/dd(min)(v)4.75Analog Voltage Av/dd(max)(v)5.25
Inl(max)(+/-lsb)0.7Sinad(db)68
Enob(bits)10.9Input Range4
Dnl(max)(+/-lsb)0.4Pin/package64TQFP
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ADC12D040
ADC12D040 Dual 12-Bit, 40 MSPS, 600 mW A/D Converter with
Internal/External Reference
Literature Number: SNAS171D

ADC12D040 Summary of contents

  • Page 1

    ... ADC12D040 ADC12D040 Dual 12-Bit, 40 MSPS, 600 mW A/D Converter with Internal/External Reference Literature Number: SNAS171D ...

  • Page 2

    ... For ease of interface, the digital output driver power pins of the ADC12D040 can be connected to a separate supply voltage in the range of 2.4V to the digital supply voltage, making the outputs compatible with low voltage systems. ...

  • Page 3

    ... Ordering Information Industrial (−40˚C ≤ T ADC12D040CIVS ADC12D040CIVSX ADC12D040EVAL Block Diagram www.national.com ≤ +85˚C) Package A 64 Pin TQFP 64 Pin TQFP Tape and Reel Evaluation Board 2 20046002 ...

  • Page 4

    Pin Descriptions and Equivalent Circuits Pin No. Symbol ANALOG I A− B− REF 11 INT/EXT REF ...

  • Page 5

    ... V exceed the voltage on V located within the supply pin. The ground return for the digital supply for the ADC12D040’s output drivers. These pins should be connected to the system digital ground, but not be connected in close proximity to the ADC12D040’ ...

  • Page 6

    Absolute Maximum Ratings (Notes Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications – Voltage ...

  • Page 7

    Converter Electrical Characteristics Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V 0V, INT/EXT = +2.0V, OEA, OEB = 0V REF ...

  • Page 8

    DC and Logic Electrical Characteristics Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, V +3.0V 0V, INT/EXT = REF apply for ...

  • Page 9

    AC Electrical Characteristics Note 8: To guarantee accuracy required that |V Note 9: With the test condition for V = +2.0V (4V REF Note 10: Typical figures are 25˚C, and represent most likely ...

  • Page 10

    ... POWER SUPPLY REJECTION RATIO (PSRR mea- sure of how well the ADC rejects a change in the power supply voltage. For the ADC12D040, PSRR1 is the ratio of the change in Full-Scale Error that results from a change in the d.c. power supply voltage, expressed in dB. PSRR2 is a measure of how well an a ...

  • Page 11

    Timing Diagram Transfer Characteristic www.national.com Output Timing 20046010 FIGURE 1. Transfer Characteristic 10 20046009 ...

  • Page 12

    Typical Performance Characteristics otherwise stated DNL INL & DNL vs. Supply Voltage DNL & INL vs. Clock Duty Cycle 5V 3V 20046036 DNL & INL vs. Clock Frequency 20046038 DNL ...

  • Page 13

    Typical Performance Characteristics otherwise stated (Continued) INL & DNL vs. Temperature SNR, SINAD, SFDR vs. Clock Frequency SNR, SINAD, SFDR vs. Input Frequency www.national.com 5V 3V SNR, SINAD, SFDR vs. ...

  • Page 14

    Typical Performance Characteristics otherwise stated (Continued) SNR, SINAD, SFDR vs. Temperature Distortion vs. Clock Frequency Distortion vs. Input Frequency 5V 3V Distortion vs. Supply Voltage 20046058 Distortion vs. Clock Duty ...

  • Page 15

    Typical Performance Characteristics otherwise stated (Continued) Distortion vs. Temperature Power Consumption vs. Temperature IMD Response Fin = 9.6 MHz, 10.2 MHz MHz CLK www.national.com 5V 3V Power ...

  • Page 16

    ... A REF 1.2 Reference Pins The ADC12D040 is designed to operate with a 2.0V refer- ence, but performs well with reference voltages in the range of 1.0V to 2.4V. Lower reference voltages will decrease the signal-to-noise ratio (SNR) of the ADC12D040. Increasing the reference voltage (and the input signal swing) beyond 2 ...

  • Page 17

    ... Complement may appear at the ADC analog inputs. The best amplifiers Output for driving the ADC12D040 input pins must be able to react to these spikes and settle before the switch opens and 1000 0000 0000 another sample is taken. The LMH6702 LMH6628 and the ...

  • Page 18

    Applications Information FIGURE 4. Application Circuit using Transformer or Differential Op-Amp Drive Circuit FIGURE 5. Differential Drive Circuit using a fully differential amplifier. 1.3.3 Input Common Mode Voltage The input common mode voltage should value ...

  • Page 19

    ... ADC digital output pin, located close to their respective pins, should be added to the circuit. 2.3 The PD Pin The PD pin, when high, holds the ADC12D040 in a power- down mode to conserve power when the converter is not being used. The power consumption in this state with a 40 MHz clock and 40mW if the clock is stopped when PD is high ...

  • Page 20

    ... Proper grounding and proper routing of all signals are es- sential to ensure accurate conversion. Maintaining separate analog and digital areas of the board, with the ADC12D040 between these areas, is required to achieve specified per- formance. The ground return for the data outputs (DR GND) carries the ground current for the output drivers ...

  • Page 21

    ... Do not allow input voltages to exceed the supply voltage, even on a transient basis. Not even during power up or power down. Be careful not to overdrive the inputs of the ADC12D040 with a device that is powered from supplies outside the range of the ADC12D040 supply. Such practice may lead to conver- sion inaccuracies and even to device damage ...

  • Page 22

    ... Applications Information improve performance. The LMH6702 and the LMH6628 have been successfully used to drive the analog inputs of the ADC12D040. Also important that the signals at the two inputs have exactly the same amplitude and be exactly 180 with each other. Board layout, especially equality of the length of the two traces to the input pins, will affect the effective phase between these two signals ...

  • Page 23

    ... Deutsch Tel: +49 (0) 69 9508 6208 English www.national.com Français Tel: +33 ( 8790 64-Lead TQFP Package Ordering Number ADC12D040CIVS NS Package Number VECO64A 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...

  • Page 24

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...