Ratiometric linear Hall-effect sensors are stable over wide temperature range

20 October 2004 Analogue, Mixed Signal, LSI

The A132X family of linear Hall-effect sensors from Allegro MicroSystems are highly sensitive, temperature-stable linear Hall-effect sensors that provide a voltage output that is proportional to the applied magnetic field.

Featuring a proprietary chopper stabilisation technique which produces optimised offset characteristics, these ratiometric linear devices offer a quiescent output voltage that is 50% of the supply voltage and nominal output sensitivity options of 2,5 mV/Gs, 3,125 mV/Gs, and 5 mV/Gs. These characteristics mean that the devices are ideal for use in linear and rotary position sensing systems in the harsh environments typically encountered in automotive and industrial applications over the temperature range from -40 to +150°C.

Each device consists of a BiCMOS monolithic circuit which integrates a Hall element, temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail low-impedance output stage. The devices are designed for 4,5-5,5 V operation, and have built-in EMC protection.

A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage normally caused by device overmoulding, temperature dependencies, and thermal stress. The high-frequency clock allows for a greater sampling frequency, which produces higher accuracy and faster signal processing capability.

Output precision is obtained by internal gain and offset trim adjustments made at the end of the production line during the manufacturing process. The range includes both 3-pin SOT and single-inline surface-mount packages covering industrial and automotive temperature ranges.

Further reading:

A new era in modular I/O solutions
Rugged Interconnect Technologies Analogue, Mixed Signal, LSI
Aerospace and defence system designers are demanding scalable and high-performance I/O solutions and while traditional mezzanine standards have proven reliable, they often fall short of meeting modern bandwidth, size, and flexibility requirements.

Read more...

---

High voltage instrument op-amp
iCorp Technologies Analogue, Mixed Signal, LSI
The SGM621B is a high accuracy, high voltage instrumentation amplifier, which is designed to set any gain from 1 to 10 000 with one external resistor.

Read more...

---

High-speed SAR ADC simplifies design
Altron Arrow Analogue, Mixed Signal, LSI
The ADI AD4080 simplifies data converter integration by integrating a low drift reference buffer, low dropout regulators and a 16K result data FIFO buffer.

Read more...

---

2-wire quad voltage output DAC
Altron Arrow Analogue, Mixed Signal, LSI
The DAC has a 2-wire serial interface that operates at clock rates up to 400 kHz, and this interface is SMBus compatible, allowing multiple devices to be placed on the same bus.

Read more...

---

Dual-channel ADC for RF applications
RFiber Solutions Analogue, Mixed Signal, LSI
The ARF0471 from Advanced RF is a dual-channel, 14-bit, 3 GSPS ADC, which features an on-chip buffer and sample-and-hold circuit.

Read more...

---

Infineon launches Edge Ai software solution
Altron Arrow Analogue, Mixed Signal, LSI
Infineon has introduced DEEPCRAFT, a new software solution category brand for Edge AI and machine learning, after the company recognised the huge potential of Edge AI for the market.

Read more...

---

16-bit voltage output denseDAC
Altron Arrow Analogue, Mixed Signal, LSI
The AD5766 uses a versatile four-wire serial interface that operates at clock rates of up to 50 MHz for write mode, and is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.

Read more...

---

AFE enables the software-defined factory
Avnet Silica Analogue, Mixed Signal, LSI
With its software configurable analogue inputs, where each input can be configured for voltage, current, resistance, or temperature, NXP’s N-AFE enables a new level of flexibility.

Read more...

---

Precision voltage reference
Altron Arrow Analogue, Mixed Signal, LSI
The ADR1001 is a fully integrated, ultra-low drift, buried Zener precision voltage reference solution in a single chip.

Read more...

---

Microphones enable low-power always-on state
Avnet Abacus Analogue, Mixed Signal, LSI
TDK Corporation has announced its InvenSense SmartSound T5848 I2S microphones to enable intelligent keyword, voice command, and sound detection at ultra-low power.

Read more...

---