UZZ9000 3, Dokumentacja techniczna

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DISCRETE SEMICONDUCTORS
DATA SHEET
UZZ9000
Sensor Conditioning Electronic
Preliminary specification
Supersedes data of 1998 May 18
2000 May 19
Philips Semiconductors
Preliminary specification
Sensor Conditioning Electronic
UZZ9000
FEATURES
PINNING
·
One chip fully integrated signal conditioning IC
SYMBOL
PIN
DESCRIPTION
Accuracy better than 1
together with KMZ41 in 100
·
°
°
+V
O2
1
sensor 2 positive differential input
angle range
+V
O1
2
sensor 1 positive differential input
·
Temperature range from
-
40 to 150
°
C
V
DD2
3
digital supply voltage
·
Adjustable angle range
V
SS
4
digital ground
·
Adjustable zero point.
GND
5
analog ground
RST
6
reset of the digital part; note 1
GENERAL DESCRIPTION
TEST1
7
for production test; note 1
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 system for 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 signals are converted into the digital domain
with two separate AD-converters. A CORDIC algorithm
performs the inverse tangent transformation. Since today’s
applications typically require analog output signals
(e.g. potentiometers), the resulting signal is transferred
back to the analog domain.
The UZZ9000 enables the user to set both the angle range
and the zero point offset. These ranges are set by external
voltage dividers.
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
DD1
21
digital supply voltage
T
out
22
test output
-
V
O2
23
sensor 2 negative differential input
-
V
O1
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
V
DDA
supply voltage
note 1
4.5
5
5.5
V
V
DD1
supply voltage
note 1
4.5
5
5.5
V
V
DD2
supply voltage
note 1
4.5
5
5.5
V
I
CCtot
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
DD2
must be connected to the same supply voltage.
2000 May 19
2
 Philips Semiconductors
Preliminary specification
Sensor Conditioning Electronic
UZZ9000
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
DDA
supply voltage
-
0.3
+6
V
V
DD1
supply voltage
-
0.3
+6
V
V
DD2
supply voltage
-
0.3
+6
V
V
pin
voltage at all pins
-
0.3
V
DD
V
T
stg
storage temperature
-
55
+150
°
C
T
j
operating temperature
125 to 150
°
C; max 200 hours
-
40
+150
°
C
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
VALUE
UNIT
R
th j-a
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
2000 May 19
3
 Philips Semiconductors
Preliminary specification
Sensor Conditioning Electronic
UZZ9000
ELECTRICAL CHARACTERISTICS
T
amb
=
40 to +150
C; V
DD
= 4.5 to 5.5 V; typical characteristics for T
amb
=25
C and V
DD
= 5 V unless otherwise
-
°
°
specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
DDA
supply voltage
4.5
5
5.5
V
V
DD1
supply voltage
4.5
5
5.5
V
V
DD2
supply voltage
4.5
5
5.5
V
I
DD
supply current
without load
-
10
15
mA
(+V
O
)-(
-
V
O
)
differential input voltage
referred to V
DD
±
6.6
-
±
28
mV/V
common mode range
referred to V
DD
490
510
mV/V
-
lost magnet threshold
referred to V
DD
-
3
-
mV/V
f
ext
external clock frequency
for trim interface
0.1
-
1
MHz
f
int
internal clock frequency
T
j
=
-
40 to 150
°
C
2.3
4
5.7
MHz
C
load
output load
50
pF
-
-
with series resistance
>300
-
-
200
nF
W
V
reset
switching voltage threshold
for power on/off
between falling and
rising V
DD
2.8
-
4.5
V
hysteresis
-
0.3
-
V
out
output voltage range for
valid ranges
lower bound
5
-
6
% V
DD
upper bound
94
-
95
% V
DD
V
d
diagnostic area
for irregular input
signal
0
-
4
% V
DD
96
-
100
% V
DD
A
accuracy
with ideal input signal;
range = 100
±
0.45
-
-
degree
°
Res
resolution
range = 100
°
0.1
-
-
degree
t
on
power up time
-
-
20
ms
t
r
response time
to 95% of final value
-
0.7
1.2
ms
V
LM
sensor voltage
lost magnet threshold
12
15
20
mV
FUNCTIONAL DESCRIPTION
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 by 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.
The UZZ9000 is a mixed signal 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 converter output is a digital bit-stream
with an over-sampling frequency of typically 500 kHz.
The bit-stream is fed into a decimation filter which
2000 May 19
4
 Philips Semiconductors
Preliminary specification
Sensor Conditioning Electronic
UZZ9000
handbook, full pagewidth
+
V
O1
DECIMATION
FILTER
ADC1
ALU
DAC
output
-
V
O1
+
V
O2
DECIMATION
FILTER
ADC2
-
V
O2
angle range
offset
DATA-CLK
SMODE
CONTROL
UZZ9000
OSCILLATOR
RESET
MHB694
reset
Fig.1 Block diagram.
The following list gives a short description of the relevant
block functions:
Angle range selection
In order to accommodate varying applications, both the
mechanical input angular range of the UZZ9000 and the
zero point of the output curve are user programmable. This
section describes how to select a desired mode.
The output curve is adjusted by changing the angular
range as shown in Fig.2. Without any zero point offset, the
ramp-up starts at mechanical 0
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 filters convert the low resolution high
speed bit stream output from the ADC’s into a low
speed digital word.
). When using a
KMZ41 sensor, the maximum angular range
°
(
a
1=0
°
Da
is 0
°
to 180
°
. For the UZZ9000, smaller angular ranges
can be set. In this case,
2 becomes smaller than 180
a
°
3.
The ALU block derives an angle value from the two
digital inputs using the CORDIC algorithm.
and the output curve is clipped at this position. The
location of discontinuity X
D
(change from lower to upper
clipping area) depends on the adjusted range and can be
calculated as follows:
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.
180
°D–
2
X
D
=
Da
+
--------------------------
6.
The RESET block supplies a reset signal during
power-up and power-down when the power supply is
below a certain value.
In order to compensate for tolerances, the zero point of the
output curve can be shifted by
. The
effect of this measure is shown in Fig.3. Now
a
1 is no
longer identical with mechanical 0˚, but with the zero point
shift X
off
. Consequently, the location of discontinuity X
D
can be calculated as follows:
±
5˚ in steps of 0.5
°
7.
The Oscillator generates the master clock.
180
°Da
–
2
X
D
=
x
off
+
Da
+
--------------------------
2000 May 19
5
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