EVAL-AD7401EDZ Analog Devices Inc, EVAL-AD7401EDZ Datasheet
EVAL-AD7401EDZ
Specifications of EVAL-AD7401EDZ
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EVAL-AD7401EDZ Summary of contents
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FEATURES 20 MHz maximum external clock rate Second-order modulator 16 bits no missing codes ±2 LSB INL typical at 16 bits 3.5 μV/°C maximum offset drift On-board digital isolator On-board reference Low power operation maximum at 5.25 V ...
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... Circuit Information.................................................................... 13 Analog Input ............................................................................... 13 Differential Inputs ...................................................................... 14 Digital Filter ................................................................................ 15 Applications Information .............................................................. 17 Grounding and Layout .............................................................. 17 Evaluating the AD7401 Performance ...................................... 17 Insulation Lifetime ..................................................................... 17 Outline Dimensions ....................................................................... 18 Ordering Guide .......................................................................... 18 12/06—Rev Rev. A Changes to Features and General Description ..............................1 Changes to Table 1.............................................................................3 Changes to Table 2 ...
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SPECIFICATIONS DD1 DD2 MHz maximum, tested with Sinc MCLK Table 1. Parameter STATIC PERFORMANCE Resolution 3 Integral Nonlinearity 3 Differential Nonlinearity 3 ...
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AD7401 Parameter LOGIC OUTPUTS Output High Voltage Output Low Voltage POWER REQUIREMENTS V DD1 V DD2 6 I DD1 7 I DD2 1 Temperature range is −40°C to +85°C. 2 All voltages are relative to their ...
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INSULATION AND SAFETY-RELATED SPECIFICATIONS Table 3. Parameter Input-to-Output Momentary Withstand Voltage Minimum External Air Gap (Clearance) Minimum External Tracking (Creepage) Minimum Internal Gap (Internal Clearance) Tracking Resistance (Comparative Tracking Index) Isolation Group REGULATORY INFORMATION Table CSA Recognized ...
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AD7401 DIN V VDE V 0884-10 (VDE V 0884-10) INSULATION CHARACTERISTICS This isolator is suitable for reinforced electrical isolation only within the safety limit data. Maintenance of the safety data is ensured by means of protective circuits. Table 5. Description ...
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ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. All voltages are relative to A their respective ground. Table 6. Parameter V to GND DD1 GND DD2 2 Analog Input Voltage to GND 1 Digital Input Voltage ...
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AD7401 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 8. Pin Function Descriptions Pin No. Mnemonic Description Supply Voltage. 4 5.25 V. This is the supply voltage for the isolated side of the AD7401 and is relative ...
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TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, using a 25 kHz brick wall filter, unless otherwise noted. A 100 90 80 MCLKIN = 16MHz MCLKIN = 5MHz MCLKIN = 10MHz 200mV p-p SINE WAVE ON ...
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AD7401 250 4. DD1 DD2 DD1 200 MCLKIN = 16MHz MCLKIN = 10MHz 4.5V V DD1 DD2 DD1 150 MCLKIN = 5MHz MCLKIN = 5MHz ...
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4.5V TO 5.25V DD1 DD2 6 MCLKIN = 16MHz MCLKIN = 10MHz 4 2 MCLKIN = 5MHz 0 –2 –4 –6 –8 V – DC INPUT (V) IN Figure 18. I vs. V − DC ...
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AD7401 TERMINOLOGY Differential Nonlinearity Differential nonlinearity is the difference between the measured and the ideal 1 LSB change between any two adjacent codes in the ADC. Integral Nonlinearity Integral nonlinearity is the maximum deviation from a straight line passing through ...
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THEORY OF OPERATION CIRCUIT INFORMATION The AD7401 isolated Σ-Δ modulator converts an analog input signal into a high speed (20 MHz maximum), single-bit data stream; the time average of the modulator’s single-bit data is directly proportional to the input signal. ...
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AD7401 DIFFERENTIAL INPUTS The analog input to the modulator is a switched capacitor design. The analog signal is converted into charge by highly linear sampling capacitors. A simplified equivalent circuit diagram of the analog input is shown in Figure 24. ...
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DIGITAL FILTER 3 A Sinc filter is recommended for use with the AD7401. This filter can be implemented on an FPGA or possibly a DSP. The following Verilog code provides an example of a Sinc implementation on a Xylinx® Spartan-II ...
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AD7401 always @ (posedge word_clk or posedge reset) if(reset) begin acc3_d2 <= 0; diff1_d <= 0; diff2_d <= 0; diff1 <= 0; diff2 <= 0; diff3 <= 0; end else begin diff1 <= acc3 - acc3_d2; diff2 <= diff1 - ...
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... All insulation structures, subjected to sufficient time and/or voltage, are vulnerable to breakdown. In addition to the testing performed by the regulatory agencies, Analog Devices has carried out an extensive set of evaluations to determine the lifetime of the insulation structure within the AD7401. These tests subjected populations of devices to continuous cross-isolation voltages ...
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... AD7401YRW-REEL −40°C to +105°C AD7401YRW-REEL7 −40°C to +105°C AD7401YRWZ −40°C to +105°C AD7401YRWZ-REEL −40°C to +105°C AD7401YRWZ-REEL7 −40°C to +105°C EVAL-AD7401EDZ EVAL-CED1Z RoHS Compliant Part. 10.50 (0.4134) 10.10 (0.3976 7.60 (0.2992) 7.40 (0.2913 ...
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NOTES Rev Page AD7401 ...
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AD7401 NOTES ©2006–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05851-0-1/11(C) Rev Page ...