ADC12062EVAL National Semiconductor, ADC12062EVAL Datasheet
ADC12062EVAL
Specifications of ADC12062EVAL
Related parts for ADC12062EVAL
ADC12062EVAL Summary of contents
Page 1
... Standby mode; typical power consumption in this mode is 100 µW. Block Diagram Ordering Information Industrial (−40˚C ADC12062BIVF ADC12062CIV ADC12062CIVF © 2001 National Semiconductor Corporation Features n Built-in sample-and-hold n Single +5V supply n Single channel or 2 channel multiplexer operation n Low Power Standby mode Key Specifications n Sampling rate: ...
Page 2
... Absolute Maximum Ratings 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Voltage at Any Input or Output Input Current at Any Pin (Note 3) Package Input Current (Note 3) Power Dissipation (Note 4) ESD Susceptibility (Note 5) ...
Page 3
Dynamic Characteristics The following specifications apply for DV 100 kHz from fullscale, and MHz, unless otherwise specified. Boldface limits apply for all other limits +25˚C. MAX A ...
Page 4
AC Electrical Characteristics The following specifications apply for DV unless otherwise specified. Boldface limits apply for T Symbol Parameter t S/H Low to EOC Low EOC Access Time t ACC (RD Low or OE High to Data Valid) TRI-STATE Control ...
Page 5
TRI-STATE Test Circuit and Waveforms Typical Performance Characteristics Offset and Fullscale Error Change vs Reference Voltage 01149035 01149002 01149004 Linearity Error Change vs Reference Voltage 01149036 5 01149003 01149005 Mux ON Resistance vs Input Voltage 01149037 www.national.com ...
Page 6
Typical Performance Characteristics Digital Supply Current vs Temperature 01149038 Conversion Time (t ) CONV vs Temperature 01149041 SINAD vs Input Frequency (ADC IN) 01149044 www.national.com (Continued) Analog Supply Current vs Temperature 01149039 EOC Delay Time (t ) EOC vs Temperature ...
Page 7
Typical Performance Characteristics SINAD vs Input Frequency (Through Mux) 01149047 SNR and THD vs Source Impedance 01149050 Timing Diagrams FIGURE 1. Interrupt Interface Timing (MODE = (Continued) SNR vs Input Frequency (Through Mux) 01149048 SNR and ...
Page 8
Timing Diagrams (Continued) FIGURE 2. High Speed Interface Timing (MODE = FIGURE 3. CS Setup and Hold Timing for S/H, RD, and OE www.national.com 01149011 8 01149010 ...
Page 9
Connection Diagrams Top View Pin Descriptions AV These are the two positive analog supply CC inputs. They should always be connected to the same voltage source, but are brought out separately to allow for separate bypass ca- pacitors. Each supply ...
Page 10
Pin Descriptions (Continued) sion is initiated by the falling edge of this control input (when CS is low). PD This is the Power Down control input. This pin should be held high for normal operation. When this pin is pulled ...
Page 11
Functional Description The results of the first flash and the Voltage Estimator’s output are given to the factory-programmed on-chip EE- PROM which returns a correction code corresponding to the error of the MSB ladder at that tap. This code is ...
Page 12
Applications Information 2.0 THE ANALOG INPUT The analog input of the ADC12062 can be modeled as two small resistances in series with the capacitance of the input ), as shown in Figure 7 . The S/H switch is hold capacitor ...
Page 13
Applications Information is a good choice for this application due to its speed and its ability to drive large capacitive loads. Figure 8 shows the LM6361 driving the ADC IN input of an ADC12062. The 100 pF capacitor at the ...
Page 14
... REFERENCE INPUTS In addition to the fully differential V inputs used on most National Semiconductor ADCs, the ADC12062 has two sense outputs for precision control of the ladder voltage. These sense inputs compensate for errors ) = 185 ns. ...
Page 15
Applications Information FIGURE 10. Reference Ladder Force and Sense Inputs Since the current flowing through the SENSE lines is essen- tially zero, there is negligible voltage drop across resistor, so the voltage at the inverting input of ...
Page 16
Applications Information 5.0 POWER SUPPLY CONSIDERATIONS The ADC12062 is designed to operate from a single +5V power supply. There are two analog supply pins (AV one digital supply pin (DV ). These pins allow separate CC external bypass capacitors for ...
Page 17
... The S/H pulse stream for the converter appears on the Q output of the HC4538. This is the S/H clock generator used on the ADC12062EVAL evaluation board. For lower power, a CMOS inverter-based crystal oscillator can be used in place of the DIP crystal oscillator. See Application Note AN-340 in the National Semiconductor CMOS Logic Databook for more information on CMOS crystal oscillators ...
Page 18
Applications Information www.national.com 9.0 APPLICATIONS (Continued) 2’s Compliment Output Ping-Ponging between V and V IN1 IN2 18 01149024 01149025 ...
Page 19
Applications Information (Continued) AC Coupling Bipolar Inputs 19 01149026 www.national.com ...
Page 20
Physical Dimensions unless otherwise noted DIMENSIONS IN MILLIMETERS www.national.com inches (millimeters) Plastic Leaded Chip Carrier (V) Order Number ADC12062CIV NS Package Number V44A Plastic Quad Flat Package (VF) Order Number ADC12062BIVF, ADC12062CIVF NS Package Number VGZ44A 20 ...
Page 21
... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...