EVAL-AD7400EDZ Analog Devices Inc, EVAL-AD7400EDZ Datasheet
EVAL-AD7400EDZ
Specifications of EVAL-AD7400EDZ
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EVAL-AD7400EDZ Summary of contents
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FEATURES 10 MHz 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 −40°C to ...
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... Typical Performance Characteristics ..............................................9 Terminology .................................................................................... 12 Theory of Operation ...................................................................... 13 Circuit Information.................................................................... 13 Analog Input ............................................................................... 13 Differential Inputs ...................................................................... 14 Digital Filter ................................................................................ 15 Applications Information .............................................................. 17 Grounding and Layout .............................................................. 17 Evaluating the AD7400 Performance ...................................... 17 Insulation Lifetime ..................................................................... 17 Outline Dimensions ....................................................................... 18 Ordering Guide .......................................................................... 18 Updated VDE Certification Throughout ......................................1 Changes to Table 6.............................................................................7 12/06—Rev Rev. A Changes to Features ..........................................................................1 Changes to Table 6.............................................................................7 Changes to Analog Input Section ...
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SPECIFICATIONS DD1 DD2 MHz, tested with Sinc filter, 256 decimation rate, as defined by Verilog code, unless otherwise noted. MCLK Table ...
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AD7400 TIMING SPECIFICATIONS DD1 DD2 Table 2. Parameter Limit MIN MAX MCLKOUT 9/ ...
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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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AD7400 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 Output Voltage to ...
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AD7400 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 AD7400 and DD1 is ...
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TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, using a 20 kHz brick wall filter, unless otherwise noted. A 100 200mV p-p SINEWAVE DECOUPLING DD1 ...
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AD7400 100 V DD1 DD1 DD2 –50 –100 5.25V DD1 DD2 –150 –200 –45 –35 –25 –15 – 105 ...
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BANDWIDTH = 100kHz 0.8 0.6 0.4 0 INPUT (V) IN Figure 18. RMS Noise Voltage vs Input IN 11.0 10.8 10.6 10 DD1 10.2 10.0 9.8 9.6 9 ...
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AD7400 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 AD7400 isolated Σ-Δ modulator converts an analog input signal into a high speed (10 MHz typical), 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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AD7400 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 23. ...
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DIGITAL FILTER 3 A Sinc filter is recommended for use with the AD7400. This filter can be implemented on an FPGA or a DSP. The following Verilog code provides an example of a Sinc on a Xilinx® Spartan-II 2.5 V ...
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AD7400 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 AD7400. These tests subjected populations of devices to continuous cross-isolation voltages ...
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... REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. ORDERING GUIDE 1 Model Temperature Range AD7400YRWZ −40°C to +105°C AD7400YRWZ-REEL −40°C to +105°C AD7400YRWZ-REEL7 −40°C to +105°C EVAL-AD7400EDZ 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 AD7400 ...
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AD7400 NOTES ©2006–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04718-0-4/11(D) Rev Page ...