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ALLEGRO A3212ELHLT-T
| Manufacturer | |
| MPN | A3212ELHLT-T |
| LCSC Part # | C146383 |
| Packaging | SOT-23W |
| Customer # | |
| Key Attributes | Micropower, Ultrasensitive Hall-Effect Switches |
| Datasheet | ALLEGRO A3212ELHLT-T |
| RoHS Compliance | 1 documents available |
| Alternative Parts | 5 |
Products Specifications
| Type | Description | |
|---|---|---|
| Category | Sensors, Transducers/Magnetic Sensors/Switches (Solid State) | |
| Manufacturer | ALLEGRO | |
| Packaging | SOT-23W | |
| BHYS | 5.9Gs | |
| Operation Points | 3.7mT;-4mT | |
| Supply Current | 5.1uA | |
| Type | Omnipolar | |
| Release Points | 3.1mT;-3.4mT | |
| Operating Temperature | -40℃~+85℃ | |
| Voltage - Supply | 2.5V~3.5V |
| Type | Description | |
|---|---|---|
| Category | Sensors, Transducers/Magnetic Sensors/Switches (Solid State) | |
| Manufacturer | ALLEGRO | |
| Packaging | SOT-23W | |
| BHYS | 5.9Gs | |
| Operation Points | 3.7mT;-4mT |
| Type | Description | |
|---|---|---|
| Supply Current | 5.1uA | |
| Type | Omnipolar | |
| Release Points | 3.1mT;-3.4mT | |
| Operating Temperature | -40℃~+85℃ | |
| Voltage - Supply | 2.5V~3.5V |
Introduction
The A3211 and A3212 integrated circuits are ultrasensitive, pole independent Hall - effect switches with latched digital output. These devices are especially suited for operation in battery operated, hand - held equipment such as cellular and cordles telephones, pagers, and palmtop computers. A 2.5 to 3.5V operation and a unique clocking scheme reduce the average operating power requirements to less than 15μW with a 2.75V supply.
Unlike other Hall - effect switches, either a north or south pole of sufficient strength will turn the output on in the A3212, and in the absence of a magnetic field, the output is off. The A3211 provides an inverted output. The polarity independence and minimal power requirements allow these devices to easily replace reed switches for superior reliability and ease of manufacturing, while eliminating the requirement for signal conditioning.
Improved stability is made possible through chopper stabilization (dynamic offset cancellation), which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress.
This device includes on a single silicon chip a Hall - voltage generator, small - signal amplifier, chopper stabilization, a latch, and a MOSFET output. Advanced CMOS processing is used to take advantage of low - voltage and low - power requirements, component matching, very low input - offset errors, and small component geometries.
Four package styles provide magnetically optimized solutions for most applications. Miniature low - profile surface - mount package types EH and EL (0.75 and 0.50mm nominal height) are leadless, LH is a 3 - pin low - profile SMD, and UA is a three - pin SIP for through - hole mounting. Packages are lead (Pb) free (suffix, - T) with 100% matte - tin - plated leadframes.
Features
- AEC - Q100 automotive qualified
- Micropower operation
- Operation with north or south pole
- 2.5 to 3.5V battery operation
- Chopper stabilized
- Superior temperature stability
- Extremely low switchpoint drift
- Insensitive to physical stress
- High ESD protection
- Solid - state reliability
- Small size
- Easily manufacturable with magnet pole independence
Products Specifications
| Type | Description | |
|---|---|---|
| Category | Sensors, Transducers/Magnetic Sensors/Switches (Solid State) | |
| Manufacturer | ALLEGRO | |
| Packaging | SOT-23W | |
| BHYS | 5.9Gs | |
| Operation Points | 3.7mT;-4mT | |
| Supply Current | 5.1uA | |
| Type | Omnipolar | |
| Release Points | 3.1mT;-3.4mT | |
| Operating Temperature | -40℃~+85℃ | |
| Voltage - Supply | 2.5V~3.5V |
| Type | Description | |
|---|---|---|
| Category | Sensors, Transducers/Magnetic Sensors/Switches (Solid State) | |
| Manufacturer | ALLEGRO | |
| Packaging | SOT-23W | |
| BHYS | 5.9Gs | |
| Operation Points | 3.7mT;-4mT |
| Type | Description | |
|---|---|---|
| Supply Current | 5.1uA | |
| Type | Omnipolar | |
| Release Points | 3.1mT;-3.4mT | |
| Operating Temperature | -40℃~+85℃ | |
| Voltage - Supply | 2.5V~3.5V |
Introduction
The A3211 and A3212 integrated circuits are ultrasensitive, pole independent Hall - effect switches with latched digital output. These devices are especially suited for operation in battery operated, hand - held equipment such as cellular and cordles telephones, pagers, and palmtop computers. A 2.5 to 3.5V operation and a unique clocking scheme reduce the average operating power requirements to less than 15μW with a 2.75V supply.
Unlike other Hall - effect switches, either a north or south pole of sufficient strength will turn the output on in the A3212, and in the absence of a magnetic field, the output is off. The A3211 provides an inverted output. The polarity independence and minimal power requirements allow these devices to easily replace reed switches for superior reliability and ease of manufacturing, while eliminating the requirement for signal conditioning.
Improved stability is made possible through chopper stabilization (dynamic offset cancellation), which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress.
This device includes on a single silicon chip a Hall - voltage generator, small - signal amplifier, chopper stabilization, a latch, and a MOSFET output. Advanced CMOS processing is used to take advantage of low - voltage and low - power requirements, component matching, very low input - offset errors, and small component geometries.
Four package styles provide magnetically optimized solutions for most applications. Miniature low - profile surface - mount package types EH and EL (0.75 and 0.50mm nominal height) are leadless, LH is a 3 - pin low - profile SMD, and UA is a three - pin SIP for through - hole mounting. Packages are lead (Pb) free (suffix, - T) with 100% matte - tin - plated leadframes.
Features
- AEC - Q100 automotive qualified
- Micropower operation
- Operation with north or south pole
- 2.5 to 3.5V battery operation
- Chopper stabilized
- Superior temperature stability
- Extremely low switchpoint drift
- Insensitive to physical stress
- High ESD protection
- Solid - state reliability
- Small size
- Easily manufacturable with magnet pole independence
C146383 EasyEDA Library
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 Compliant |
| ECCN | EAR99 |
| CNHTS | |
| USHTS | |
| TARIC | |
| CAHTS | |
| BRHTS | |
| INHTS | |
| MXHTS |
| Type | Details |
|---|---|
| RoHS | ROHS3 Compliant |
| ECCN | EAR99 |
| CNHTS | |
| USHTS | |
| TARIC |
| Type | Details |
|---|---|
| CAHTS | |
| BRHTS | |
| INHTS | |
| MXHTS | |