AD7694BRM Analog Devices Inc, AD7694BRM Datasheet
AD7694BRM
Specifications of AD7694BRM
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AD7694BRM Summary of contents
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FEATURES 16-bit resolution with no missing codes Throughput: 250 kSPS @ 5 V INL: ±4 LSB max S/( kHz THD: –106 kHz Pseudo-differential analog input range with ...
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AD7694 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Application Diagram........................................................................ 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications....................................................................... 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Terminology ...................................................................................... ...
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SPECIFICATIONS VDD = 2 5. VDD; T REF A Table 2. Parameter Conditions RESOLUTION ANALOG INPUT Voltage Range IN+ − IN− Absolute Input Voltage IN+ IN− Leakage Current at 25°C Acquisition phase Input Impedance ACCURACY ...
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AD7694 VDD = 2 5. VDD; T REF A Table 3. Parameter Conditions REFERENCE Voltage Range Load Current 250 kSPS, V SAMPLING DYNAMICS −3 dB Input Bandwidth DIGITAL INPUTS Logic Levels V VDD = 4.75 ...
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TIMING SPECIFICATIONS VDD = 4. 5. −40°C to +85°C, unless otherwise stated. A Table 4. Parameter Conversion Time: CNV Rising Edge to Data Available Time Between Conversions SCK Period SCK Low Time SCK High Time ...
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AD7694 ABSOLUTE MAXIMUM RATINGS Table 6. Parameter Rating Analog Inputs 1 1 IN+ , IN− GND − 0 VDD + 0 ±130 mA REF GND − 0 VDD + 0.3 V Supply Voltages VDD ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 7. Pin Function Descriptions Pin No. Mnemonic Type 1 Function 1 REF AI Reference Input Voltage. The REF range is from VDD referred to the GND pin. This pin ...
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AD7694 TERMINOLOGY Integral Nonlinearity Error (INL) Linearity error refers to the deviation of each individual code from a line drawn from negative full scale to positive full scale. The point used as negative full scale occurs ½ LSB before the ...
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TYPICAL PERFORMANCE CHARACTERISTICS 4 POSITIVE INL = +0.68 LSB NEGATIVE INL = –1.14 LSB –1 –2 –3 –4 0 16384 32768 CODE Figure 5. Integral Nonlinearity vs. Code 12000 108568 10000 8000 6000 4000 2000 12500 ...
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AD7694 100 95 SNR 90 ENOB S/[N+ 2.5 3.0 3.5 4.0 REFERENCE VOLTAGE (V) Figure 11. SNR, S/(N + D), and ENOB vs. Reference Voltage 100 2.5V, –1dB REF ...
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OFFSET ERROR 0 –2 GAIN ERROR –4 –6 –55 –35 – TEMPERATURE (°C) Figure 17. Offset and Gain Error vs. Temperature 105 125 Rev Page AD7694 ...
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AD7694 APPLICATION INFORMATION IN+ REF GND IN– CIRCUIT INFORMATION The AD7694 is a low power, single-supply, 16-bit ADC using a successive approximation architecture capable of con- verting 250,000 samples per second (250 kSPS) and powers down between conversions. ...
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TO V REF (NOTE 3) NOTES 1. SEE REFERENCE SECTION FOR REFERENCE SELECTION USUALLY A 10μF CERAMIC CAPACITOR (X5R). REF 3. SEE DRIVER AMPLIFIER CHOICE SECTION. 4. OPTIONAL FILTER. SEE ANALOG INPUT SECTION. TYPICAL CONNECTION DIAGRAM ...
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AD7694 Table 9. Recommended Driver Amplifiers Amplifier Typical Application AD8021 Very low noise and high frequency AD8022 Low noise and high frequency OP184 Low power, low noise, and low frequency AD8605, AD8615 5 V single-supply and low power AD8519 Small, ...
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CNV t CONV ACQUISITION CONVERSION SCK SDO 1 SDO REMAINS LOW IF FURTHER SCK CLOCKS ARE APPLIED WHILE CNV IS LOW. DIGITAL INTERFACE The AD7694 is compatible with SPI, QSPI, digital hosts, and DSPs, for example, Blackfin® ADSP-BF53x or ADSP-219x. ...
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... Integral Model Nonlinearity AD7694ARM ±6 LSB max AD7694ARMRL7 ±6 LSB max AD7694BRM ±4 LSB max AD7694BRMRL7 ±4 LSB max 1 EVAL-AD7694CB 2 EVAL-CONTROL BRD2 2 EVAL-CONTROL BRD3 1 This board can be used as a standalone evaluation board or in conjunction with the EVAL-CONTROL BRDx for evaluation/demonstration purposes. ...