AD670AD Analog Devices, AD670AD Datasheet
AD670AD
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AD670AD Summary of contents
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... The A and B grades (– +85 C) and the S grade (– +125 C) come in 20-pin ceramic DIP packages. REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use ...
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AD670–SPECIFICATIONS Model OPERATING TEMPERATURE RANGE RESOLUTION CONVERSION TIME RELATIVE ACCURACY MIN MAX 1 DIFFERENTIAL LINEARITY ERROR MIN MAX GAIN ACCURACY @ + MIN MAX UNIPOLAR ZERO ERROR @ +25 C ...
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Model Min OPERATING TEMPERATURE RANGE –40 RESOLUTION CONVERSION TIME RELATIVE ACCURACY MIN MAX 1 DIFFERENTIAL LINEARITY ERROR MIN MAX GAIN ACCURACY @ + MIN MAX UNIPOLAR ZERO ERROR @ +25 ...
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... Range AD670JN +70 C AD670JP +70 C AD670KN +70 C AD670KP +70 C AD670AD – +85 C AD670BD – +85 C AD670SD – +125 C NOTES 1 For details on grade and package offerings screened in accordance with MIL-STD-883 refer to the Analog Devices Military Products Databook. ...
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CONNECTING THE AD670 The AD670 has been designed for ease of use. All active com- ponents required to perform a complete A/D conversion are on board and are connected internally. In addition, all calibration trims are performed at the factory, ...
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AD670 Figure 4a. CMRR Over Frequency Figure 4b. AD670 Input Rejects Common-Mode Ground Noise Good common-mode performance is useful in a number of situ- ations. In bridge-type transducer applications, such performance facilitates the recovery of differential analog signals in the ...
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Bipolar 6c. Full Scale (Unipolar) Figure 6. Transfer Curves CONTROL AND TIMING OF THE AD670 Control Logic The AD670 contains on-chip logic to provide conversion and data read operations from signals commonly available in micro- processor systems. Figure 7 ...
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AD670 Figure 8. Write/Convert Start Timing The R/W line is used to direct the converter to start a conver- sion (R/W low) or read data (R/W high). The relative sequenc- ing of the three control signals (R/W, CE, CS) is ...
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APPLYING THE AD670 The AD670 has been designed for ease of use, system compat- ibility, and minimization of external components. Transducer interfaces generally require signal conditioning and preampli- fication before the signal can be converted. The AD670 will reduce and ...
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AD670 STRAIN GAGE MEASUREMENTS Many semiconductor-type strain gages, pressure transducers, and load cells may also be connected directly to the AD670. These types of transducers typically produce 30 mV full-scale per volt of excitation. In the circuit shown in Figure ...
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Figure 17. Low Cost Sample-and-Hold Circuit for AD670 Since settling to 1/2 LSB at 8-bits of resolution requires 6.2 RC time constants, the 500 pF hold capacitors and CD4066’s 300 on-resistance yield an acquisition time of under 1 s, assuming ...
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AD670 20-Pin Plastic DIP (N-20) 0.048 (1.21) 0.042 (1.07) 0.048 (1.21) 0.042 (1.07) 0.020 (0.50) R OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 20-Terminal PLCC Package(P-20A) 0.180 (4.57) 0.165 (4.19) 0.056 (1.42) 0.025 (0.63) 0.042 (1.07) 0.015 (0.38) 3 ...