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PDF MLX10420AA Data sheet ( Hoja de datos )
| Número de pieza | MLX10420AA | |
| Descripción | 3-channel air-core gauge driver | |
| Fabricantes | Melexis | |
| Logotipo |  |
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MLX10420AA
3-channel air-core gauge driver
with serial interface
Features and Benefits
Supply voltage up to 12 V.
Interface directly with 3.3/5 V CMOS logic µP
Serial peripheral interface
Can drive two air core actuators over the full 360°and one over 90°.
Open circuit or short circuit detection of the drivers’ outputs.
Small size (SSOP20 package)
Real time angle tracking
Applications
Air-core meter Driver Dashboard
Industrial Metering
Ordering Code
Product Code Temperature Code
MLX10420
R
Package Code
FR
Option Code Packing Form Code
AAA-000
RE
Legend:
Temperature Code:
Package Code:
Packing Form:
R for Temperature Range -40°c to 105°c
FR for SSOP 209 mil
RE for Reel
Ordering example: MLX10420RFR-AAA-000-RE
1 Functional diagram
CSB
SCLK
SI
SO
POR
ROM SEQ
SPI
logic
RC
OSC
BUF 1
360deg
BUF 2
360deg
BUF 3
90deg
SIN1P
SIN1M
COS1P
COS1M
SIN2P
SIN2M
COS2P
COS2M
OUT3
2 General Description
The MLX10420 is a µP peripheral for air-core
meters control using SIN/COS PWM commands.
The circuit controls two independent sets of
CMOS power bridges. A ten bit angle is
displayed with 9 bits per quadrant. The PWM
frequency is set by an on chip oscillator. A
power-on self test detects open or short-circuits
outputs for each air-core meter and a real time
angle tracking avoids display errors.
The chip can also drive one small angle air-core
meters (90°).
The communication with the µP is done via a
three wires serial link.
The chip outputs an error status on a special pin.
3901010420
Rev 2
Page 1 of 25
Device specification
Jun/12
Free Datasheet http://www.Datasheet4U.com
1 page  
MLX10420AA
3-channel air-core gauge driver
with serial interface
7 Glossary of Terms
Table 2 explains the abbreviations used in this document.
CMOS
DC
ESD
HBM
i.e.
POR
PWM
RCOSC
rev
RT
TA
TC
tri-state
Complementary Metal Oxide Semiconductor (standard logic family)
direct current
Electro-Static Discharge
human body model (for ESD)
'id est' … which is …
Power On Reset
Pulse Width Modulation
RC oscillator
revision
room temperature
ambient temperature
temperature coefficient
high impedant state of a driver output
Table 2: abbreviations used in this document
3901010420
Rev 2
Page 5 of 25
Device specification
Jun/12
Free Datasheet http://www.Datasheet4U.com
5 Page 
MLX10420AA
3-channel air-core gauge driver
with serial interface
10.2 Dynamic characteristics
Table 7 shows the dynamic characteristics of the chip. DC Operating Parameters are default TA = -40oC to
105oC, Vsup = 4.5V to 12V, unless otherwise specified.
Parameter.
Symbol
On chip oscillator
Clock frequency
Fclku
Absolute tolerance of the
clock frequency after
calibration
Tolclka
Temperature variation of the Tolclkt
clock frequency after
calibration
Test Conditions
Min Typ Max
Units
At Vsup = 12V, uncalibrated
At Vsup = 12V, 25 oC, after full
calibration to 1MHz
At Vsup = 12V, after full
calibration to 1MHz
0.7 1
-10
-6
1.7 MHz
10 %
6%
Serial communication
Recommended Frequency of FSPI
SPI Operation
Falling edge of CSB to Rising TLEAD
Edge of SCLK (Required
Setup Time) (note 7)
Falling edge of SCLK to
Rising Edge of CSB
(Required Setup Time) (note
7)
TLAG
SI to Falling Edge of SCLK TSISU
(Required Setup Time) (note
7)
Falling Edge of SCLK to SI
(Required Hold Time) (note
7)
TSI
SO Rise Time (CL=200pF) TRSO
(note 7)
SO Fall Time (CL=200pF)
(note 7)
TFSO
SI, CSB, SCLK, Incoming TRSI
Signal Rise Time (Note 1, 7)
CSB, SCLK, Incoming Signal TFSI
Fall Time (Note 1, 7)
Rising Edge of CSB to
Falling Edge of CSB
(Required Setup Time) (Note
5, 7)
TCSB
Rising Edge of VCC to
Falling Edge of CSB
(Required Setup Time) (Note
6, 7)
TEN
0.5 1.0
20
20
MHz
ns
ns
75 ns
75 ns
75 ns
75 ns
75 ns
75 ns
32 µs
10 ms
3901010420
Rev 2
Page 11 of 25
Device specification
Jun/12
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet MLX10420AA.PDF ] | |
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