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UZZ9001 Folha de dados(PDF) 4 Page - NXP Semiconductors

Nome de Peças UZZ9001
Descrição Electrónicos  Sensor Conditioning Electronic
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Fabricante Electrônico  PHILIPS [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

UZZ9001 Folha de dados(HTML) 4 Page - NXP Semiconductors

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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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