General Description
AH1751 is a single-digital-output Hall-effect sensor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify Hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an open-collector output pre-driver. An internal band-gap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.
While the magnetic flux density (B) is larger than threshold Bop, the OUT pin turns on (low). If B removed toward Brp, the OUT pin is latched “on” state prior to B < Brp. When B < Brp, the OUT pin go into “ off ” state.

Features
*Bipolar Hall Effect Latch Sensor
*3.5V to 20V DC Operation Voltage
*Open Collector Pre-Driver
*50mA Output Sink Current
*Chip Power Reverse-Connection Protection
*Operating Temperature: -40oC~125oC
*Package: SIP3
*SIP3: Available in “Green” Molding Compound (No Br, Sb)
*Lead Free Finish/ RoHS Compliant (Note 1)

Applications
*Rotor Position Sensing
*Current Switch
*Encoder
*RPM Detection

AH1751-P, AH1751-PGA-A, AH1751-PGB-A
TAG EFFECT, Hall, Latch

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General Description
The MLX90251 is a CMOS Programmable, Ratiometric Linear Hall Effect sensor IC. The linear output voltage is proportional to the magnetic flux density. The ratiometric output voltage is proportional to the supply voltage. The MLX90251 possesses active error correction circuitry, which virtually eliminates the offset errors normally associated with analog Hall Effect devices. All the parameters of the MLX90251 transfer characteristic are fully programmable. The VOQ (VOUT @ B = 0 Gauss), the Sensitivity, the slope polarity, the Output Clamping levels, the thermal Sensitivity drift, the internal bias point and low-pass filter are all programmable in end-user applications. The MLX90251 has a very stable thermal compensation for both the Sensitivity and the VOQ over a broad temperature range. For traceability purpose the MLX90251 will carry a unique ID number programmed by Melexis and 24 bits of EEPROM memory are allocated for a user programmed serial number.

Features and Benefits
*Analog Signal Processing
*Quad Switched Hall Plate
*Chopper Stabilized Amplifier
*Linear Analog Ratiometric Output Voltage
*Programmable Output Quiescent Voltage (VOQ) -100%VDD…200%VDD Range
*Programmable Magnetic Sensitivity
*Programmable Low Pass Filter
*Programmable Clamping Voltage
*Programmable Temperature Compensation
*Melexis ID Number
*Programmable Customer ID Number
*Lead-free package

Application Examples
*Linear Position Sensing
*Rotary Position Sensing
*Current Sensing
*Magnetic Field Measurement

MLX90251LVA-2, MLX90251EGO-2

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 The SS490 Series MRL (Miniature Ratiometric Linear) sensors are small, versatile linear Hall effect devices which are operated by the magnetic field from a permanent magnet or an electromagnet.
The ratiometric output voltage is set by the supply voltage and varies in proportion to the strength of the magnetic field.
The integrated circuitry provides increased temperature stability and sensitivity.
Laser trimmed thin film resistors provide high accuracy (null to ± 3%, sensitivity up to ±3%) and temperature compensation.
These linear position sensors have an operating temperature range of -40˚C to +150°C, appropriate for industrial and automotive environments.
They respond to either positive or negative gauss, monitoring either or both magnetic poles.
The quad Hall sensing element minimizes the effects of mechanical or thermal stress on the output.
The positive temperature coefficient of the sensitivity (+0.02%/°C typical) helps compensate for the negative temperature coefficients of low cost magnets, providing a robust design over a wide temperature range.
Rail-to-rail operation (over full voltage range) provides a more usable signal for higher accuracy.
The recent extension to the product line, the SS490B Series, offers costeffective MRL sensing solutions with slightly wider specifications than the SS490 high-performance products.
Like the SS490 Series, the SS490B has a typical sinking or sourcing output of 1.5 mA continuous, uses 7 mA of supply current at 5.0 volts and 25˚C, and provides predictable performance over the full temperature range.
The SS490B Series sensors have wider null and sensitivity tolerances and a wider drift over temperature.
The SS490B Series sensors are a new lower cost product line extension.
They complement the SS490 Series of small size, high accuracy and high performance miniature linear products.

FEATURES
• Small size (.160 x .118 in)
• Power consumption of 7 mA at 5 VDC for energy efficiency
• Single current sinking or current sourcing output
• Linear output for circuit design flexibility
• Built-in thin film resistors are laser trimmed for precise sensitivity and temperature compensation
• Rail-to-rail operation provides more useable signal for higher accuracy
• Temperature range of -40°C to +150°C
• Responds to either positive or negative gauss
• Quad Hall sensing element for stable output

TYPICAL APPLICATIONS
• Current sensing
• Motor control
• Position sensing
• Magnetic code reading
• Rotary encoder
• Ferrous metal detector
• Vibration sensing
• Liquid level sensing
• Weight sensing

SS495A
SS495A1
SS495A2
SS495B

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Features and Benefits
· Small Plastic Package (SOT-23, 4-SIP-VA, TO-92)
· Quad Switched Hall Plate / Chopper Stabilized Amplifier
· Ratiometric Output for A/D Interface
· Low Quiescent Voltage Thermal Drift

Applications
· Linear Position Sensing
· Rotary Position Sensing
· Current Sensing

Description
The MLX90242 is a CMOS Linear Hall Effect sensor IC. It possesses active error correction
circuitry which virtually eliminates the offset errors normally associated with analog Hall
Effect devices.
The ratiometric output voltage is proportional to the supply voltage. When using the supply
voltage as a reference for an A/D converter, fluctuations of +10% in supply voltage will not
affect accuracy. For a positive slope, the voltage at the output will increase as a South magnetic field is applied to the branded face of the MLX90242. Conversely, the voltage output will decrease in the presence of a North magnetic field. For a negative slope, the voltage at the
output will increase as a North magnetic field is applied to the branded face of the MLX90242.
Conversely, the voltage output will decrease in the presence of a South magnetic field.

MLX90242LUA-CC03
MLX90242LVA-CC03
MLX90242ESO-BC03
MLX90242ESO-CC03

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Features
• Micropower operation
• Operation with North or South Pole
• 1.65 to 3.3V battery operation
• Chopper stabilized
• Superior temperature stability
• Extremely Low Switch-Point Drift
• Insensitive to Physical Stress
• Good RF noise immunity
• -40°C to 85°C operating temperature
• ESD > 4KV in human body mode
• SOT553: Available in “Green” Molding Compound (no Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)

General Description
AH1883 is with two Hall effect plates and a CMOS output driver, mainly designed for battery–powered, hand-held equipment (such as Cellular and Cordless Phone, PDA). The total operation power is down to 15uW in the 1.8V supply.
Either north or south pole of sufficient strength will turn the output on. The output will be turned off under no magnetic field.
While the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (low), the output is held until B is lower than release point (Brp), then turned off.

Applications
• Cellular phone
• PDA
• Cordless phone

AH1883-Z

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Features
• Micropower operation
• Operation with North or South Pole
• 1.65 to 3.3V battery operation
• Chopper stabilized
• Superior temperature stability
• Extremely Low Switch-Point Drift
• Insensitive to Physical Stress
• Good RF noise immunity
• -40°C to 85°C operating temperature
• ESD > 4KV in human body mode
• SOT553: Available in “Green” Molding Compound (No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)

General Description
AH1885 is with two Hall effect plates and dual CMOS output driver, mainly designed for battery–powered, hand-held equipment (such as Cellular and Cordless Phone, PDA). The total operation power is down to 15uW in the 1.8V supply. Either north or south pole of sufficient strength will turn the output1 on. The output1 will be turned off under no magnetic field.
While the magnetic flux density (B) is larger than operate point (Bop), the output1 will be turned on (low), the output1 is held until B is lower than release point (Brp), then turned off.

Applications
• Cellular phone
• PDA
• Cordless phone

AH1885-Z


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Features
- Micropower operation
- Operation with magnetic field of either north or south pole (omnipolar)
- 2.5V to 5.5V battery operation
- Chopper stabilized
- Superior temperature stability
- Good RF noise immunity
- 40°C to 85°C operating temperature
- SIP-3L/SC59-3L/Low profile DFN2020-6 package
- ESD (HBM) > 5KV for DFN2020-6
                   > 6KV for SIP-3L and SC59-3L
- Lead Free Finish/RoHS Compliant for Lead Free products (Note 1)
- Green Packages: SC59-3L, DFN2020-6
- Lead Free Package: SIP-3L

General Description
 AH180 is comprised of two Hall effect plates and an open-drain output driver, mainly designed for battery-operation, hand-held equipment (such as Cellular and Cordless Phone, PDA). The
total power consumption in normal operation is typically 24µW with a 3V power source.
Either north or south pole of sufficient strength will turn the output on. The output will be turned off under no magnetic field. While the magnetic flux density (B) is larger than operating point (Bop), the output will be turned on (low), the output is held until B is lower than release point (Brp), then turned off.

Applications
- Cover switch in clam-shell cellular phones
- Cover switch in Notebook PC/PDA
- Contact-less switch in consumer products °C

AH180-P AH180-W AH180-SN AH180-PL-A AH180-WL-A AH180-SNL-A AH180-PG-A
AH180-WG-A AH180-SNG-A AH180-PL-B-7 AH180-WL-B-7 AH180-SNL-B-7
AH180-PG-B-7 AH180-WG-B-7 AH180-SNG-B-7

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Features
• Bipolar Hall Effect Latch Sensor
• 3.5V to 20V DC Operation Voltage
• Open Collector Pre-Driver
• 25mA Output Sink Current
• Chip Power Reverse-Connection Protection
• Operating Temperature: -40oC~150oC
• Lead Free Finish/RoHS Compliant for Lead Free
products (Note 1)
• Lead Free Packages: SIP-3L, SC59-3L
• Green Package: SC59-3L

General Description
 AH175 is a single-digital-output Hall-effect sensor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify Hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an open-collector output pre-driver. An internal band-gap regulator is used to provide temperature
compensated supply voltage for internal circuits and allows a wide operating supply range.

 While the magnetic flux density (B) is larger than threshold Bop, the OUT pin turns on (low). If B removed toward Brp, the OUT pin is latched “on” state prior to B < Brp. When B < Brp, the OUT pin goes into “off ” state.

Applications
• Rotor Position Sensing
• Current Switch
• Encoder
• RPM Detection

AH175-PL-7-A AH175-WL-7-A AH175-PG-7-A AH175-WG-7-A AH175-PL-B-A AH175-WL-B-A
AH175-PG-B-A AH175-WG-B-A AH175-PL-A-A AH175-WL-A-A AH175-PG-A-A AH175-WG-A-A AH175-PL-7-B AH175-WL-7-B AH175-PG-7-B AH175-WG-7-B AH175-PL-B-B AH175-WL-B-B AH175-PG-B-B AH175-WG-B-B AH175-PL-A-B AH175-WL-A-B AH175-PG-A-B AH175-WG-A-B

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Features
• Bipolar Hall Effect Latch Sensor
• 3V to 20V DC Operation Voltage
• Built-in Pull-Up Resistor
• 25mA Output Sink Current
• Operating Temperature: C 125 ~ C 40 ° + ° −
• Lead Free Finish/RoHS Compliant for Lead Free products
• Lead Free Package: SIP-3L, SC59-3L
• Green Package: SC59-3L

General Description
AH173 is a single-digital-output Hall-effect sensor with pull-up resistor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify Hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an output driver with a pull-up resistor (Rpu). An internal band-gap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. While the magnetic flux density (B) is larger than operate point (Bop), the OUT pin turns on (low). If B moves toward release point (Brp), the OUT pin is latched “on” state prior to B < Brp. When B < Brp, the OUT pin goes into “off ” state.

Applications
• Rotor Position Sensing
• Current Switch
• Encoder
• RPM Detection

AH173-P AH173-W  AH173-PL7-A AH173-WL7-A AH173-PG7-A AH173-WG7-A AH173-PLA-A
AH173-WLA-A AH173-PGA-A AH173-WGA-A AH173-PLB-A AH173-WLB-A AH173-PGB-A
AH173-WGB-A AH173-PL7-B AH173-WL7-B AH173-PG7-B AH173-WG7-B AH173-PLA-B
AH173-WLA-B AH173-PGA-B AH173-WGA-B AH173-PLB-B AH173-WLB-B AH173-PGB-B
AH173-WGB-B

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DESCRIPTION
The µ PA1818 is a switching device which can be driven directly by a 2.5 V power source.
This device features a low on-state resistance and excellent switching characteristics, and is suitable for applications such as power management of notebook
computers and so on.

FEATURES
• 2.5 V drive available
• Low on-state resistance
- RDS(on)1 = 15.2 mΩ MAX. (VGS = −4.5 V, ID = −5.0 A)
- RDS(on)2 = 16 mΩ MAX. (VGS = −4.0 V, ID = −5.0 A)
- RDS(on)3 = 25 mΩ MAX. (VGS = −2.5 V, ID = −5.0 A)
• Built-in G-S protection diode against ESD

ABSOLUTE MAXIMUM RATINGS (TA = 25°C)
* Drain to Source Voltage (VGS = 0 V)         VDSS           −20 V
* Gate to Source Voltage (VDS = 0 V)          VGSS         ± 12 V
* Drain Current (DC) (TA = 25°C)                 ID(DC)       ± 10 A
* Drain Current (pulse)                              ID(pulse)    ± 40 A
* Total Power Dissipation                           PT              2.0 W
* Channel Temperature                              Tch             150 °C
* Storage Temperature                               Tstg          −55 to +150 °C

UPA1818GR-9JG

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