(1) Ratiometry is disabled by default for this version
Ordering example : MLX91207-LDC-CAA-007-TU
Ordering Option
Code
CAA-005
CAA-005
CAA-007
CAA-007
(1)
CAA-015
(1)
CAA-015
Packing
form Code
TU (Tube)
RE (Reel)
TU
RE
TU
RE
Comment
15-45mV/mT (25mV/mT)
15-45mV/mT (25mV/mT)
5-20mV/mT (10mV/mT)
5-20mV/mT (10mV/mT)
15-45mV/mT (25mV/mT)
15-45mV/mT (25mV/mT)
3. Functional Diagram
3.3V core
TEMPOUT
3.3V
ana
Thermometer
3.3V
dig
Voltage
Regulator
&
Rev.Pol.
protection
VDIG
VDD
Oscillator
Clock
1 MHz
Generator
fs = 1MHz
fs = 1MHz
Input data rate
fi = 250kHz or 25kHz
Intermediate data rate
fo = 250 kHz or 25 kHz
Output data rate
5V ratiometric
output
VSS
4-
Phase
Switch
Box
DIDO
Integrating
P2P
LPF
S&H
Clamping
Output
Buffer
OUT
G = 15 … 239
Hall
Bias
G = 0.4 … 1
G=4
DAC
3 bits
10 bits
2 bits
12 bits
6 bits
Digital
Ratiometry
TC1ST[6:0]
TC2ND_COLD[4:0]
TC2ND_HOT[4:0]
RG[2:0]
FG[9:0]
OFFSETDRIFT_HOT[5:0]
OFFSETDRIFT_COLD[5:0]
PLATEPOL
FILTCODE[1:0] XA[11:0] CLAMPLOW[2:0]
CLAMPHIGH[2:0]
HallSensors
selection
Sensitivity
trimming
DIGITAL + EEPROM
Rough Gain
Fine Gain
Offset
Compensation
Polarity
selection
Bandwidth
Voq adjust
Figure 1: Block diagram
REVISION 16 - APRIL/12
39010091207
PAGE 1 OF 20
MLX91207
High Speed Hall Sensor IC
Datasheet
4. General Description
The MLX91207 is a monolithic programmable hall sensor IC, which provides a high speed analog output signal
proportional to the external applied flux density. The sensor is ideally suitable for current sensing application and
features an additional thermometer output. Moreover, the sensor can be integrated in position sensing applications
where fast response time is required.
The transfer characteristics of the MLX91207 are fully programmable (offset, gain, clamping levels, diagnostic
functions…). The full analog chain features a fast response time and allows use of the sensor for applications where a
very fast response time < 10
sec
is required.
In the typical application the sensor is used in combination with a ring shaped soft ferromagnetic core. The Hall-IC is
placed in a small air gap and the current conductor is passed through the inner part of the ferromagnetic ring. The
ferromagnetic ring concentrates and amplifies the magnetic flux on the Hall-Sensor IC which generates an output
voltage proportional to the current. Figure 2 shows a typical sensor application for a contact-less current
measurement.
Figure 2: Typical application of MLX91207
REVISION 16 - APRIL/12
39010091207
PAGE 2 OF 20
MLX91207
High Speed Hall Sensor IC
Datasheet
Table of Contents
1. Features and Benefits.......................................................................................................................................1
4. General Description..........................................................................................................................................2
Table of Contents .................................................................................................................................................3
5. Glossary of Terms .............................................................................................................................................4
6. Absolute Maximum Ratings ..............................................................................................................................4
7. Pin Definitions and Descriptions .......................................................................................................................4
8. General Electrical Specifications .......................................................................................................................5
9. Magnetic specification .....................................................................................................................................6
14. Applications Information .............................................................................................................................. 14
14.1. Current Measurement ..........................................................................................................................14
14.2. Linear Position ......................................................................................................................................14
18. Package Information .................................................................................................................................... 17
18.2. SOIC8 Pin Out and Marking ..................................................................................................................17
19. Related documents and toolsPackage Information....................................................................................... 19
19.1. Related documents ...............................................................................................................................19
19.2. Related software ..................................................................................................................................19
19.3. Related hardware .................................................................................................................................19
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