DISCRETE SEMICONDUCTORS DATA SHEET UZZ9001 Sensor Conditioning Electronic Product specification Supersedes data of 2000 May 19 2000 Nov 27 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 FEATURES PINNING • One chip angle sensor output signal conditioning SYMBOL • 180° angle range with KMZ41 PIN DESCRIPTION +VO2 1 sensor 2 positive differential input • Accuracy better than 1° together with KMZ41 +VO1 2 sensor 1 positive differential input • Temperature range from −40 to +150 °C VDD2 3 digital supply voltage • SPI protocol VSS 4 digital ground • SO24 package. GND 5 analog ground RST 6 reset of the digital part; note 1 GENERAL DESCRIPTION TEST1 7 for production test; note 1 The UZZ9001 is an integrated circuit that combines two sinusoidal signals (sine and cosine) into one single linear output signal. These signals might come from the magnetoresistive sensor KMZ41. This results in a measurement system for angles up to 180°. The integrated circuit UZZ9001 can also be used for all other applications in which an angle has to be calculated from a sine and cosine signal. A typical application would be any kind of resolver application. The two input signals are converted into the digital domain with two separate AD converters. A CORDIC algorithm performs the inverse tangent transformation. The output stage implements the Motorola Serial Peripheral Interface (SPI) protocol. TEST2 8 note 2 DATA_CLK 9 trim-mode data-clock; note 1 SMODE 10 serial mode programmer; note 1 TEST3 11 note 2 data 12 SPI data output CLK 13 SPI data clock in CS 14 SPI chip select OFFS2 15 offset trimming input sensor 2 OFFS1 16 offset trimming input sensor 1 VDDA 17 analog supply voltage GND 18 analog ground TEST4 19 for production test; note 1 TEST5 20 for production test; note 1 VDD1 21 digital supply voltage Tout 22 test output −VO2 23 sensor 2 negative differential input −VO1 24 sensor 1 negative differential input Notes 1. Connected to ground. 2. Pin to be left unconnected. QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VDDA supply voltage note 1 4.5 5 5.5 V VDD1 supply voltage note 1 4.5 5 5.5 V VDD2 supply voltage note 1 4.5 5 5.5 V ICCtot total supply current no output load − 5 15 mA Res resolution − 13 − bit A accuracy ±0.35 − − deg Idata-out peak output current − − 10 mA with ideal input signal Note 1. VDDA, VDD1 and VDD2 must be connected to the same supply voltage. 2000 Nov 27 2 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 60134). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VDDA supply voltage −0.3 +6 V VDD1 supply voltage −0.3 +6 V VDD2 supply voltage −0.3 +6 V Vpin voltage at all pins −0.3 VDD V Tstg storage temperature −55 +150 °C Tamb operating temperature −40 +150 °C 125 to 150 °C; max 200 hours THERMAL CHARACTERISTICS SYMBOL Rth j-a PARAMETER thermal resistance from junction to ambient VALUE UNIT 80 K/W VALUE UNIT 2 kV ±150 V ESD SENSITIVITY SYMBOL ESD PARAMETER ESD sensitivity CONDITIONS human body model machine model 2000 Nov 27 3 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 − 5 15 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 Vreset switching voltage threshold constant current − − 1 mA peak current − − 10 mA between falling and rising VDD 2.8 − 4.5 V − 0.3 − V ±0.35 − − degree hysteresis A accuracy with ideal input signal Res resolution − 13 − bit ton power up time − − 20 ms tr response time − 0.7 1.2 ms VID digital input voltage to 95% of final value LO signal 0 − 0.3 x VDD 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 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. 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. 2000 Nov 27 4 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 handbook, full pagewidth +VO1 −VO1 +VO2 −VO2 ADC1 DECIMATION FILTER ADC2 DECIMATION FILTER ALU data CLK CS SPI DATA-CLK CONTROL RESET UZZ9001 SMODE OSCILLATOR MHB698 reset Fig.1 Block diagram. The following list gives a short description of the relevant block functions: Serial Peripheral interface (SPI) The UZZ9001 provides an interface to SPI compatible devices, and as a slave node functions in one operational mode only. For Motorola SPI devices, this mode is selected by setting CPHA to 1 and CPOL to 1. In this transfer mode, data bits are sampled by the master using the leading edge of the clock as shown in Figure 2. The falling edge indicates that the next data bit has to be provided by the slave device (shift operation). An advantage of this mode is that the CS input toggles only once between every two sensor data bytes (see Fig.3). Data transmission can be stopped by the user at any time. The leading edge of the CS input initialises the SPI shift register allowing the start of a complete new transmission. If the CS line is held active low during stop of transmission, resumption of transmission can be made without loss of data 1. The ADC block contains two Sigma Delta AD converters, sensor offset correction circuitry and the circuitry required for the sensitivity and offset adjustment of the chip output voltage curve. 2. Two digital low pass decimation filters convert the low resolution high speed bit stream coming from the ADC Sigma Delta converters into a low speed digital word. 3. The ALU block derives an angle value from the two digital inputs using the CORDIC algorithm. 4. The SPI converts the output of the ALU block to a SPI compatible 16 bit word. 5. The CONTROL block provides the clock and the control signals for the chip. 6. The RESET block supplies a reset signal during power-up and power-down when the power supply is below a certain value. 7. The Oscillator unit generates the master clock. 2000 Nov 27 5 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 handbook, full pagewidth CS 1 3 2 5 CLK 4 10 9 8 DATA note1 MSB-OUT Bits 6-1 LSB-OUT MHB699 10 11 (1) Not defined data, normally LSB of character previously transmitted. Fig.2 UZZ9001 SPI timing. Table 1 SPI-Timing DIAGRAM NUMBER PARAMETER SYMBOL MIN. MAX. UNIT REMARKS/TEST CONDITIONS 1 cycle time tcyc 1 − µs 2 enable lead time tlead 15 − ns determined by master module 3 enable lag time tlag 15 − ns determined by master module 4 clock high time tclk_high 100 − ns determined by master module 5 clock low time tclk_low 100 − ns determined by master module 8 access time tacc 0 20 ns time to data active from fixed VSS state 9 disable time tdis − 25 ns hold time to fixed VSS state 10 data valid time (after clock edge) tv − 40 ns with 100 pF on all SPI pins 11 data hold time th (output, after clock edge) 5 − ns operating frequency fop − 1 MHz transmission delay (time between the leading edge of CS until the next falling edge) tdelay 1.2 − µs 2000 Nov 27 6 Philips Semiconductors Product specification Sensor Conditioning Electronic handbook, full pagewidth UZZ9001 sensor byte 2 DATA sensor byte 1 CS MHB700 Fig.3 CS Line timing. Sensor signal coding The error and diagnostic conditions are indicated by D13 = 1 (active high). In an error situation the last two bits (D0 and D1) specify the error code (see Table 2). All other bits (D3 to D12) still show the current measurement value, but as the last two bits are lost for measurement representation the resolution is reduced to 11 bit. The sensor signal comprises 14 bits (D13 to D0) as shown in Fig.4. Bits D12 to D0 are used for the coding of the angle while D0 is reserved to indicate error and diagnostic conditions as defined below. The 14 data bits are arranged in 2 Bytes. D13 is the MSB of the sensor signal and D0 is the LSB of the sensor signal. Byte 2, which is sent first, contains data bits D13 to D7 and additionally the parity bit P2 which is included for the recognition of interrupted messages. P2 gives the ODD parity of data bits D13 to D7 and has to be evaluated by the master module.Similarly, Byte 1 comprises data bits D6 to D0 and parity bit P1, which gives the ODD parity of data bits D6 to D0. The internal coding of angle values is as follows: 00 0000 0000 0000B = 0°, 180° 01 1111 1111 1111B = (2 D13 DO 13 Table 2 Error and diagnostic cases coding MEASUREMENT VALUE RELIABLE D1 D0 CASE 0 0 no valid value presently no available due to RESET 0 1 magnet lost no 1 0 reserved − 1 1 reserved − 180° – 1 ) -----------≈ 179.978 13 2 During normal operation, bit D13 is active low. Each increment represents an angle value 180° ≈ 0.022° of: α inc = -----------13 2 handbook, full pagewidth sensor byte 2 P2 D13 D12 D11 D10 D9 sensor byte 1 D8 D7 P1 D6 D5 D4 MSB D3 D2 D1 D0 LSB MHB701 Fig.4 Sensor signal coding. 2000 Nov 27 7 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 Magnet lost condition Trim interface If both offset corrected input signal of sensor 1 and sensor 2 are below the lost magnet threshold then the failure ‘Magnet lost’ is assumed. The UZZ9001 trim mode serial interface consists of the two terminals SMODE (pin 10) and DATA_CLK (pin 9). The structure of this protocol is shown in Figure 5. All signal levels of DATA_CLK and SMODE must lie within the ranges set out in Table 3. The protocol starts with a falling edge at the SMODE, which must occur at a high DATA_CLK level. The following five bits are used to code the message sent to the UZZ9001. They are transferred via the SMODE and are sampled with the rising edge of the DATA_CLK. During the fifth high level output of DATA_CLK (counted from the start condition onwards), a rising edge must appear at the SMODE and the DATA_CLK follows this with one more change to low level in order to successfully complete the protocol. Offset trimming To achieve a linear output characteristic, it is necessary to shift the offsets of the two input signals to the input stage of the UZZ9001. For this reason a sensor offset cancellation procedure has been implemented in the UZZ9001 which is started by sending a special serial data protocol to the UZZ9001. This trimming procedure is required for both input signals. handbook, full pagewidth start stop condition statusbit # condition 1 2 3 4 5 DATA_CLK (input at pin 9) SMODE (input at pin 10) T1 TOUT (output at pin 22) T0 MHB702 Fig.5 Protocol used to set UZZ9001 into trim mode. Table 3 Definition of the trim interface signals PARAMETER MIN. MAX. UNIT low level of DATA_CLK, SMODE 0 5 %VDD high level of DATA_CLK, SMODE 95 100 %VDD rise and fall time of DATA_CLK and SMODE signal edges (10 to 90% VDD) and (90 to 10% VDD) 8 − ns 0.1 1 MHz DATA_CLK frequency 2000 Nov 27 8 Philips Semiconductors Product specification Sensor Conditioning Electronic Table 4 UZZ9001 Programming of trim modes STATUS BITS MODE 1 2 3 4 5 enter trim mode for sensor input channel 1 0 0 0 1 0 enter trim mode for sensor input channel 2 0 0 1 0 0 leave trim mode for either input channel 0 0 0 0 0 How to enter the trim mode Measurement dynamics Details of voltage levels and timing of the status bits to be transmitted to the UZZ9001 are given in Table 3. Note that a complete protocol has to be sent before normal operation can be resumed. The trim mode can also be exited by resetting the device. After entering one of the trim modes and provided there is a dynamic input signal there will be a square wave output at the terminal TOUT (pin 22). The UZZ9001 includes an on-chip RC Oscillator that generates the clock for the whole device. Consequently, no external clock supply is required for the measurement system. The nominal clock frequency of the on-chip oscillator is 4 MHz at room temperature. It varies with temperature change. At −40 °C the clock frequency may decrease to 2.3 MHz. At higher temperatures however, a frequency up to 5.7 MHz may occur. This influences the dynamics of measurements. From an application point of view, two different effects have to be distinguished. The system delay, which means how long it takes until a changed input signal is recognized at the output, and the measurement update rate. The system delay is mainly caused by the settling time of the low pass decimation filter, which depends on the maximum frequency content (shape) of the input signals and the clock frequency. The following maximum values can be expected for the entire system delay. The measurement update rate, however, is directly related to the oscillator frequency. At room temperature, a new value is available every 0.26 ms. When taking the entire temperature range into account, update rates between 0.45 and 0.18 ms are possible. (see Table 5) Reset In addition to the external reset pin (pin 6), the UZZ9001 provides an internal power-up/ power-down reset logic which continuously monitors the supply voltage. When the supply voltage increases and reaches a safe level, reset becomes inactive and the device starts initialization. When the supply voltage exceeds the safe voltage level, the device is reset immediately. This internal reset logic can be over-ridden in all modes and at any time by applying an external active high command to the RES input pin (pin 6) in all modes and at any time. The reset pin RES (pin 6). This pin is internally pulled to ground and therefore need not be connected if the function is not required. 2000 Nov 27 9 Philips Semiconductors Product specification Sensor Conditioning Electronic Table 5 UZZ9001 System delay and update rates of the UZZ9001 PARAMETER MIN. TYP. MAX. UNIT System delay (time elapsed until 95% of the final value is reached) max. signal frequency < 200 MHz − − 0.6 ms transients (step response) − − 1.2 ms −40 °C 0.45 − − ms +25 °C (room temperature) − 0.26 − ms +150 °C − − 0.18 ms Measurement update rate APPLICATION INFORMATION handbook, full pagewidth C1 100 nF +VO2 +VO1 KMZ41 VDD 3, 4 VSS 2 6 1 24 2 23 3 22 4 21 5 6 7 1 5 (1) 7, 8 8 (1) −VO2 20 UZZ9001 19 (1) 1 2 OFFS1 3 1 18 17 9 16 10 15 11 14 12 13 GND −VO1 2 OFFS2 3 CS (chip select) CLK (clock in) SPI in/out data out ground MHB703 (1) For test applications pin to be left unconnected. Fig.6 UZZ9001 trim mode configuration. 2000 Nov 27 10 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 PACKAGE OUTLINE SO24: plastic small outline package; 24 leads; body width 7.5 mm SOT137-1 D E A X c HE y v M A Z 13 24 Q A2 A (A 3) A1 pin 1 index θ Lp L 1 12 e detail X w M bp 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y mm 2.65 0.30 0.10 2.45 2.25 0.25 0.49 0.36 0.32 0.23 15.6 15.2 7.6 7.4 1.27 10.65 10.00 1.4 1.1 0.4 1.1 1.0 0.25 0.25 0.1 0.9 0.4 inches 0.10 0.012 0.096 0.004 0.089 0.01 0.019 0.013 0.014 0.009 0.61 0.60 0.30 0.29 0.050 0.419 0.043 0.055 0.394 0.016 0.043 0.039 0.01 0.01 0.004 0.035 0.016 Z (1) θ 8o 0o Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT137-1 075E05 MS-013 2000 Nov 27 EIAJ EUROPEAN PROJECTION ISSUE DATE 97-05-22 99-12-27 11 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 DATA SHEET STATUS DATA SHEET STATUS PRODUCT STATUS DEFINITIONS (1) Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product specification Production This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Note 1. Please consult the most recently issued data sheet before initiating or completing a design. DEFINITIONS DISCLAIMERS Short-form specification The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Life support applications These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Limiting values definition Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Right to make changes Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Application information Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. 2000 Nov 27 12 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 NOTES 2000 Nov 27 13 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 NOTES 2000 Nov 27 14 Philips Semiconductors Product specification Sensor Conditioning Electronic UZZ9001 NOTES 2000 Nov 27 15 Philips Semiconductors – a worldwide company Argentina: see South America Australia: 3 Figtree Drive, HOMEBUSH, NSW 2140, Tel. +61 2 9704 8141, Fax. +61 2 9704 8139 Austria: Computerstr. 6, A-1101 WIEN, P.O. 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