Philips UZZ9000 Datasheet

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UZZ9000

Sensor Conditioning Electronic

Product speciﬁcation Supersedes data of 2000 May 19

2000 Nov 27

Philips Semiconductors Product speciﬁcation

Sensor Conditioning Electronic UZZ9000

FEATURES

• One chip fully integrated signal conditioning IC

• Accuracy better than 1° together with KMZ41 in 100°

angle range

• Temperature range from −40 to 150 °C

• Adjustable angle range

• Adjustable zero point.

GENERAL DESCRIPTION

The UZZ9000 is an integrated circuit that combines two sinusoidal signals (sine and cosine) into one single linear output signal. When used in conjunction with the magnetoresistive sensor KMZ41 it provides a measurement systemfor angles up to 180°. The UZZ9000 can also be used for other applications in which an angle has to be calculated from a sine and a cosine signal. A typical application would be any kind of resolver application. The two input signalsare convertedinto thedigital domain with two separate AD-converters. A CORDIC algorithm performsthe inverse tangenttransformation.Sincetoday’s applications typically require analog output signals (e.g. potentiometers), the resulting signal is transferred back to the analog domain. TheUZZ9000 enablesthe userto setboth the anglerange and the zero point offset. Theseranges areset byexternal voltage dividers.

PINNING

SYMBOL PIN DESCRIPTION

+V +V V V

O1 DD2 SS

1 sensor 2 positive differential input 2 sensor 1 positive differential input 3 digital supply voltage

4 digital ground GND 5 analog ground RST 6 reset of the digital part; note 1 TEST1 7 for production test; note 1 TEST2 8 note 2 DATA_CLK 9 trim-mode data-clock; note 1 SMODE 10 serial mode programmer; note 1 TEST3 11 note 2 V

OUT

12 output voltage Var 13 angle-range input set V

ofﬁn

14 offset input set OFFS2 15 offset trimming input sensor 2 OFFS1 16 offset trimming input sensor 1 V

DDA

17 analog supply voltage GND 18 analog ground TEST4 19 for production test; note 1 TEST5 20 for production test; note 1 V T

−V

DD1 out

O2 O1

21 digital supply voltage

22 test output

23 sensor 2 negative differential input

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

DDA

DD1

DD2

CCtot

supply voltage note 1 4.5 5 5.5 V supply voltage note 1 4.5 5 5.5 V supply voltage note 1 4.5 5 5.5 V

total supply current − 13 15 mA A angle range in 10° steps with KMZ41 30 − 180 deg A accuracy with ideal input signal; range = 100°±0.45 −−deg

Note

1. V

DDA

, V

DD1

and V

must be connected to the same supply voltage.

DD2

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Philips Semiconductors Product speciﬁcation

Sensor Conditioning Electronic UZZ9000

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 60134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

DDA

DD1

DD2

stg

THERMAL CHARACTERISTICS

SYMBOL PARAMETER VALUE UNIT

th j-a

supply voltage −0.3 +6 V supply voltage −0.3 +6 V supply voltage −0.3 +6 V voltage at all pins −0.3 V

V storage temperature −55 +150 °C operating temperature 125 to 150 °C; max 200 hours −40 +150 °C

thermal resistance from junction to ambient 80 K/W

ESD SENSITIVITY

SYMBOL PARAMETER CONDITIONS VALUE UNIT

ESD ESD sensitivity human body model 2 kV

machine model ±150 V

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Philips Semiconductors Product speciﬁcation

Sensor Conditioning Electronic UZZ9000

ELECTRICAL CHARACTERISTICS

= −40 to +150 °C; VDD= 4.5 to 5.5 V; typical characteristics for T

amb

speciﬁed.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

DDA

DD1

DD2

(+V

)-(−VO) differential input voltage referred to V

ext

int

load

supply voltage 4.5 5 5.5 V supply voltage 4.5 5 5.5 V supply voltage 4.5 5 5.5 V supply current without load − 10 15 mA

common mode range referred to V lost magnet threshold referred to V

DD DD

external clock frequency for trim interface 0.1 − 1 MHz internal clock frequency Tj= −40 to 150 °C 2.3 4 5.7 MHz output load −−50 pF

with series resistance >300 Ω

reset

switchingvoltagethreshold for power on/off

between falling and rising V

hysteresis − 0.3 −

out

output voltage range for valid ranges

lower bound 5 − 6% V upper bound 94 − 95 % V

diagnostic area for irregular input

signal

A accuracy with ideal input signal;

range = 100° Res resolution range = 100° 0.1 −−degree t

power up time −−20 ms response time to 95% of ﬁnal value − 0.7 1.2 ms sensor voltage lost magnet threshold 12 15 20 mV

=25°C and VDD= 5 V unless otherwise

amb

±6.6 −±28 mV/V 490 − 510 mV/V

− 3 − mV/V

−−200 nF

2.8 − 4.5 V

DD DD

0 − 4% V 96 − 100 % V

DD DD

±0.45 −−degree

FUNCTIONAL DESCRIPTION

The UZZ9000is a mixedsignal IC for angle measurement systems. The UZZ9000 has been designed for the double sensor KMZ41. It combines two analog signals (sine and cosine) into a linear output signal. The analog measurement signals on the IC input are converted to digital data by two ADC’s. Each ADC is a Sigma-Delta modulator employing a 4th order continuous time architecture with an over-sampling ratio of 128 to achieve high resolution. The converteroutput isa digitalbit-stream with an over-sampling frequency of typically 500 kHz. The bit-stream is fed into a decimation filter which

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performs both low pass filtering and down-sampling. The IC has twoinput channels each of which has its own ADC and decimationfilter. The twodecimation filter outputsare 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 arethen used to calculatethe current angleby the ALU. This calculation is carried out using the so-called CORDIC algorithm. The angle is represented by a 13-bit resolution. A DAC converts the digital signal back to the analog domain.

Philips Semiconductors Product speciﬁcation

Sensor Conditioning Electronic UZZ9000

handbook, full pagewidth

−V

O1 O1

O2 O2

ADC1

ADC2

RESET

DECIMATION

FILTER

DECIMATION

FILTER

UZZ9000

ALU DAC output

CONTROL

OSCILLATOR

angle range offset DATA-CLK SMODE

reset

Fig.1 Block diagram.

The following list gives a short description of the relevant block functions:

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. The decimation filter block comprises two digital low pass decimation filtersconvert the low resolution high speed bit stream output from the ADC’s 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 DAC converts the output of the ALU block to an analog signal.

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 generates the master clock.

MHB694

Angle range selection

In order to accommodate varying applications, both the mechanical input angular range of the UZZ9000 and the zeropoint oftheoutput curveareuser programmable.This section describes how to select a desired mode. The output curve is adjusted by changing the angular range asshown inFig.2. Without anyzero pointoffset, the ramp-up starts at mechanical 0° (α1=0°). When using a KMZ41 sensor, the maximum angular range ∆α is 0° to 180°. For the UZZ9000, smaller angular ranges can be set. In this case, α2 becomes smaller than 180° and the output curve is clipped at this position. The location of discontinuity XD (change from lower to upper clipping area) depends on the adjusted range and can be calculated as follows:

180°∆α–

∆α

-------------------------2

Inorder tocompensate fortolerances, thezero point ofthe output curve can be shifted by ±5˚ in steps of 0.5°. The effect of this measure is shown in Fig.3. Now α1 is no longer identicalwith mechanical 0˚,but with the zero point shift X

. Consequently, the location of discontinuity X

off

can be calculated as follows:

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Dxoff

∆α+

180°∆α–

-------------------------2

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