AD7740YRM Analog Devices Inc, AD7740YRM Datasheet
AD7740YRM
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AD7740YRM Summary of contents
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GENERAL DESCRIPTION The AD7740 is a low-cost, ultrasmall synchronous Voltage-to- Frequency Converter (VFC). It works from a single 5.25 V supply consuming 0.9 mA. The AD7740 is available in an ...
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AD7740 SPECIFICATIONS 2 Parameter DC PERFORMANCE Integral Nonlinearity 3 CLKIN = 32 kHz CLKIN = 1 MHz 3 CLKIN = 32 kHz CLKIN = 1 MHz Offset Error Gain Error 3 Offset Error Drift 3 Gain Error Drift 3 Power ...
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TIMING CHARACTERISTICS Limit MIN MAX Parameter VDD = 3 3 CLKIN 40:60 HIGH LOW 60: 2 1.6 3 ± ...
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... V to VDD + 0.15 V. When it is tied high, VIN is buffered and the range on the VIN pin is restricted to 0 VDD – 0.2 V. Note that the SOT-23 and microSOIC packages have different pinouts. Model Temperature Range AD7740KRM 0°C to 85°C AD7740YRT –40°C to +105°C AD7740YRM –40°C to +105°C PIN CONFIGURATIONS 1 8 BUF BUF AD7740 2 ...
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TERMINOLOGY INTEGRAL NONLINEARITY For the VFC, Integral Nonlinearity (INL measure of the maxi- mum deviation from a straight line passing through the actual endpoints of the VFC transfer function. The error is expressed the actual ...
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AD7740–Typical Performance Characteristics 0.015 VDD = 5V REFIN = 2.5V 0.01 CLKIN = 1MHz 0.005 BUFFER OFF 0 –0.005 BUFFER ON –0.01 –0.015 –0.5 0 0.5 1 1.5 2 2.5 VIN – REFIN ...
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GENERAL DESCRIPTION The AD7740 is a CMOS synchronous Voltage-to-Frequency Converter (VFC) which uses a charge-balance conversion technique. The input voltage signal is applied to a proprietary front-end based around an analog modulator which converts the input voltage into an output ...
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AD7740 Clock Generation As distinct from the asynchronous VFCs that rely on the stability of an external capacitor to set their full-scale frequency, the AD7740 uses an external clock to define the full-scale output frequency. The result is a more ...
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A/D Conversion Techniques Using the AD7740 One method of using a VFC in an A/D system is to count the output pulses of FOUT for a fixed gate interval (see Figure 9). This fixed gate interval should be generated by ...
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AD7740 Temperature Sensor Application The AD7740 can be used with an AD22100S temperature sensor to give a digital measure of ambient temperature. The output voltage of the AD22100S is proportional to the tempera- ture times the supply voltage. It uses ...
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OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Lead microSOIC (RM-8) 0.122 (3.10) 0.114 (2.90 0.122 (3.10) 0.199 (5.05) 0.114 (2.90) 0.187 (4.75 PIN 1 0.0256 (0.65) BSC 0.120 (3.05) 0.112 (2.84) 0.043 (1.09) 0.006 (0.15) ...