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UZZ9001 Folha de dados(PDF) 4 Page - NXP Semiconductors |
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UZZ9001 Folha de dados(HTML) 4 Page - NXP Semiconductors |
4 / 16 page 2000 Nov 27 4 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 ELECTRICAL CHARACTERISTICS Tamb = −40 to +150 °C; VDD = 4.5 to 5.5 V; typical characteristics for Tamb =25 °C and VDD = 5 V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VDDA supply voltage 4.5 5 5.5 V VDD1 supply voltage 4.5 5 5.5 V VDD2 supply voltage 4.5 5 5.5 V IDD supply current without load − 515 mA (+VO)-(−VO) differential input voltage referred to VDD ±6.6 −±28 mV/V common mode range referred to VDD 490 − 510 mV/V lost magnet threshold referred to VDD −3 − mV/V fext external clock frequency for trim interface 0.1 − 1 MHz fint internal clock frequency 2.3 4 5.7 MHz Io data output constant current −− 1mA peak current −− 10 mA Vreset switching voltage between falling and rising VDD 2.8 − 4.5 V threshold hysteresis − 0.3 − V A accuracy with ideal input signal ±0.35 −− degree Res resolution − 13 − bit ton power up time −− 20 ms tr response time to 95% of final value − 0.7 1.2 ms VID digital input voltage LO signal 0 − 0.3xVDD V HI signal 0.7 x VDD − VDD V VOD digital output voltage LO signal −− 0.4 V HI signal VDD −0.8 −− V VLM sensor voltage lost magnet threshold 12 15 20 mV FUNCTIONAL DESCRIPTION The UZZ9001 is a mixed signal IC for angle measurement systems. It combines two analog signals (sine and cosine) into a linear output signal. The output stage implements the Motorola Serial Peripheral Interface (SPI) protocol. The UZZ9001 has been designed for use with the double sensor KMZ41. The analog measurement signals on the IC input are converted to digital data with two ADC’s. The ADC’s are a Sigma-Delta modulator employing a 4th order continuous time architecture with an over-sampling ratio of 128 to achieve high resolution. The converter output is a digital bitstream with an over-sampling frequency of typically 500 kHz. The bitstream is fed into a decimation filter which performs both low pass filtering and down-sampling. The IC has two input channels each of which has its own ADC and decimation filter. The two decimation filter outputs are 15-bit digital words at a lower frequency of typically 3.9 kHz which is the typical sampling frequency of the sensor system. The digital representations of the two signals are then used to calculate the current angle. This calculation is carried out using the so-called CORDIC algorithm. The angle is represented with a 13-bit resolution. An SPI compatible interface converts the output word to the serial peripheral interface protocol. |
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