A3516

Temperature-Stable Quiescent Output Voltage

Precise Recoverability After Temperature Cycling

Output Voltage Proportional to Applied Magnetic Field

Ratiometric Rail-to-Rail Output

Improved Sensitivity

4.5 V to 5.5 V Operation

Immune to Mechanical Stress

Small Package Size

Solid-State Reliability

Calibrated linear Hall devices, which can be used to deter-mine the actual flux density presented to the sensor in a particu-lar application, are available.

For safe, reliable operation, the output should not be pulled above the supply voltage or pulled below the device ground.

For optimum performance, a 0.1 F capacitor between the supply and ground, and a 100 pF capacitor between the output and ground, should be added.

The ratiometric feature is especially valuable when these devices are used with an analog-to-digital converter. A/D converters typically derive their LSB step size by ratioing off a reference voltage line. If the reference voltage varies, the LSB will vary proportionally. This is a major error source in many sensing systems. The A3515xUA and A3516xUA can eliminate this source of error by their ratiometric operation. Because their gain and offsets are proportional to the supply voltage, if they are powered from the A/D reference voltage, the sensor output voltage will track changes in the LSB value.

These devices can withstand infrequent temperature excur-sions, beyond the Absolute Maximum Ratings, to T_A = 170°C provided the junction temperature, T _J, does not exceed 200°C.

Extensive applications information on Hall-effect sensors and magnets is also available in the "Hall-Effect IC Applications Guide", which can be found in the latest issue of the Allegro
MicroSystems Electronic Data Book, AMS-702 or Application Note 27701, or at www.allegromicro.com

Supply Voltage, V_CC .............................. 8.0 V
Output Voltage, V_O................................ 8.0 V
Output Sink Current, I_O ....................... 10 mA
Magnetic Flux Density, B.................. Unlimited
Package Power Dissipation,
P_D............................................. See Graph
Operating Temperature Range*, T_A
Suffix 'E' .................. -40°C to +85°C
Suffix 'L' .................-40°C to +150°C
Storage Temperature Range,
T_S .................................-65°C to +170°C

This is the description about A3515 and A3516 of the ratiometric, linear hall-effect sensors for high temperature operation.

The A3515 and A3516 are sensitive, temperature-stable linear halleffect sensors with greatly improved offset characteristics. Ratiometric, linear Hall-effect sensors provide a voltage output that is proportional to the applied magnetic field and have a quiescent output voltage that is approximately 50% of the supply voltage. These magnetic sensors are ideal for use in linear and rotary position sensing systems in the harsh environments of automotive and industrial applications over extended temperatures to -40°C and +150°C. The A3515 features an output sensitivity of 5 mV/G, while the A3516 has an output sensitivity of 2.5 mV/G. See the Magnetic Characteristics table for complete, individual device parametrics.

Each BiCMOS monolithic circuit integrates a Hall element, improved temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail lowimpedance output stage.

A proprietary dynamic offset cancelation technique, with an internal high-frequency clock, reduces the residual offset voltage, which is normally caused by device overmolding, temperature dependancies, and thermal stress. This technique produces devices that have an extremely stable quiescent output voltage, are immune to mechanical stress, and have precise recoverability after temperature cycling. Many problems normally associated with low-level analog signals are minimized by having the Hall element and amplifier in a single chip. Output precision is obtained by internal gain and offset trim adjustments during the manufacturing process.

These devices A3516 are supplied in a 3-pin ultra-mini-SIP 'UA' package.

Here are the features. Temperature-stable quiescent output voltage; precise recoverability after temperature cycling; output voltage proportional to applied magnetic field; ratiometric rail-to-rail output; improved sensitivit; 4.5 v to 5.5 v operation; immune to mechanical stress; small package size; solid-state reliability.

At present there is not too much information about A3516. If you are willing to find more about the A3515 and A3516, please pay attention to our web! We will promptly update the relevant information. You can find it in www.ChinaICMart.com or www.seekic.com. Welcome to contact with us