AD7750
FEATURES
Two Differential Analog Input Channels Product of Two Channels Voltage-to-Frequency Conversion on a Single Channel Real Power Measurement Capability < 0.2% Error Over the Range 400% Ibasic to 2% Ibasic Two or Four Quadrant Operation (Positive and Negative Power) Gain Select of 1 or 16 on the Current Channel (Channel 1) Choice of On-Chip or External Reference Choice of Output Pulse Frequencies Available (Pins F1 and F2) High Frequency Pulse Output for Calibration Purposes (FOUT ) HPF on Current Channel for Offset Removal Single 5 V Supply and Low Power
G1 V1+ V1- x16
Product-to-Frequency Converter AD7750
FUNCTIONAL BLOCK DIAGRAM
VDD ACDC ADC1 2ND ORDER MODULATOR HPF ADC2 V2+ V2- x2
REVP DELAY CLKOUT CLKIN MULT
2ND ORDER MODULATOR
DTF 2.5V BAND GAP REFERENCE LPF
F1 F2
REFIN FS S1 S2
FOUT
AGND
REFOUT
DGND
GENERAL DESCRIPTION
PRODUCT HIGHLIGHTS
The AD7750 is a Product-to-Frequency Converter (PFC) that can be configured for power measurement or...
