AD7750AR Analog Devices, AD7750AR Datasheet
AD7750AR
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AD7750AR Summary of contents
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... The AD7750 is fabricated on 0.6 CMOS technology; a pro- cess that combines low power and low cost. REV. 0 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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AD7750–SPECIFICATIONS Parameter ACCURACY 1 Measurement Error Gain = 1 Gain = 16 Phase Error Between Channels Phase Lead 40 (PF = +0.8) Phase Lag 60 (PF = –0.5) Feedthrough Between Channels Output Frequency Variation (F ) OUT Power Supply Rejection ...
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... Storage Temperature Range . . . . . . . . . . . . – +150 C Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150 C Model AD7750AN AD7750AR CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD7750 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...
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AD7750 Pin No. Mnemonic Descriptions 1 V Power Supply Pin nominal Gain Select, Digital Input. This input selects the gain for the Channel 1 differential input. When G1 is low, the gain is 1 and ...
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Typical Performance Characteristics 140 120 AS PER DATA SHEET CONDITIONS WITH 100 GAIN = 0.1 0.2 0.3 0.4 50Hz RIPPLE – V rms Figure 1. PSR as a Function of V 0.6 0.4 ...
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AD7750 0.1 0.05 0 –0.05 –0.1 –0. FULL SCALE –0.2 –0.25 –0.3 0.001 0.01 0.1 V1 AMPLITUDE – mV rms Figure 4. Error as a Percentage (%) of Reading Over a Dynamic Range of 1000, Gain ...
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ANALOG INPUTS The analog inputs of the AD7750 are high impedance bipolar voltage inputs. The four voltage inputs make up two truly differential voltage input channels called V any ADC, an antialiasing filter or low-pass filter is required on the ...
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AD7750 MAX AGND 1– MAX AGND 2– Figure 10. Maximum Input Signals with Respect to AGND for a Single-Ended Input Scheme 125mV MAX ...
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DETERMINING THE OUTPUT FREQUENCIES OF THE AD7750 and F2 are the frequency outputs of the AD7750. The OUT output frequencies of the AD7750 are a multiple of a binary fraction of the master clock frequency CLKIN. This ...
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AD7750 FOUR QUADRANT MULTIPLICATION (SIGN AND MAGNITUDE) (+) V2 F – MAX MAX (–) V1(– MAX MAX (+) V2(–) Figure 14. Transfer Functions (Four and Two Quadrant Multiplication) Maximum Output Frequencies Table II shows ...
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PGA V 1– 2– Figure 15. Equivalent AD7750 Signal Processing Chain ...
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AD7750 The high frequency F output is intended to be used for OUT communications (via IR LED) and calibration purposes. F produces wide pulse at a frequency that is proportional to the product of Channel 1 and ...
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For 100 PPKWHR V is equal to 0.255 V rms or the line volt- 2 age attenuated by a factor of 860. Calculation 1 100 PPKWHR = 0.02777 Hz/kW rms and line voltage of 220 V ...
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AD7750 Registering the Power Output The low frequency pulse outputs (F1 and F2) of the AD7750 provide the frequency output from the product-to-frequency conversion. These outputs can be used to drive a stepper motor or impulse counter. A high frequency ...
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Table III. Components for Suggested Class 1 Meter Implementation in Figure 21 Schematic Designator Description R1 470 , 5 5%, 1/2 W R3, R4, 100 , 10%, 1 10%, ...
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AD7750 0.210 (5.33) MAX 0.160 (4.06) 0.115 (2.93) 0.0118 (0.30) 0.0040 (0.10) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 20-Lead Plastic DIP (N-20) 1.060 (26.90) 0.925 (23.50 0.280 (7.11) 0.240 (6.10 0.325 (8.25) 0.300 (7.62) ...