Datasheet > 3197

3197

更新时间： 2024-02-05 15:03:02

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
12页	193K
描述
PROTECTED, HIGH-TEMPERATURE, OPEN-COLLECTOR HALL-EFFECT LATCH

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3197 数据手册

3197

PROTECTED, HIGH-TEMPERATURE,

OPEN-COLLECTOR HALL-EFFECT LATCH

These open-collector Hall-effect latches are capable of sensing magnetic

fields while using an unprotected power supply. The A3197LLT and A3197LU

can provide position and speed information by providing a digital output for

magnetic fields that exceed their predefined switch points. These devices

operate down to zero speed and have switch points that are designed to be

extremely stable over a wide operating temperature and voltage range. The

latching characteristics make them ideal for use in pulse counting applications

when used with a multi-pole ring magnet. Thermal and output short-circuit

protection allow an increased wiring harness fault tolerance. The temperature

compensated switch points, the wide operating voltage range, and the integrated

protection make these devices ideal for use in automotive applications such as

transmission speed sensors and integrated wheel bearing speed sensors.

PTCT

Each monolithic device contains an integrated Hall-effect transducer, a

temperature-compensated comparator, a voltage regulator, and a buffered 35 mA

output sink stage. Supply protection is made possible by the integration of

overvoltage and undervoltage shutdown circuitry that monitor supply fault

conditions and shut down the IC. Noise shutdown circuitry (patent applied for)

prevents the propagation of supply transients to the logic load. Output protec-

tion circuitry includes a current limit loop that limits the maximum output sink

current, and thermal protection circuitry that shuts down the device during an

Dwg. PH-003-2

over-heating condition such as with a shorted load.

ABSOLUTE MAXIMUM RATINGS

The A3197LLT and A3197LU are rated for operation over an extended

temperature range of -40°C to +150°C. They are supplied in a three-lead SIP

(suffix ‘U’) or a surface-mount SOT-89 (suffix ‘LT’).

Supply Voltage, V_CC

(100 ms) ................................... 115 V*

(continuous) ............................... 28 V*

Reverse Battery Voltage, V_RCC

(100 ms) ................................... -100 V

(continuous) ............................... -35 V

Magnetic Flux Density, B .......... Unlimited

Output OFF Voltage, V_OUT................. 26 V

FEATURES

I Internal Protection For Automotive (ISO/DIN) Transients

I Operation From Unregulated Supply

I Reverse Battery Protection

Reverse Output Voltage V_OUT......... -0.5 V

Continuous Output Current,

I_OUT.......................................... 35 mA*

Reverse Output Current,

I_OUT........................................ -100 mA

Package Power Dissipation,

P_D....................................... See Graph

Junction Temperature, T_J................. 170°C

Operating Temperature Range,

I Undervoltage Lockout

I Supply Noise-Suppression Circuitry

I Output Short-Circuit Protection

I Output Zener Clamp

I Thermal Protection

T_A^{..........................................}-40°C to +150°C

Storage Temperature, T_S.................. 170°C

I Symmetrical Latching Switch Points

I Operable with Multipole Ring Magnets

*Fault condition, internal overvoltage shutdown

above 28 V; output current limited above 35 mA.

Always order by complete part number, e.g., A3197LU .

12 3 4 5 6 7...12

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3-1971773-3	TE	获取价格	THIS DRAWING IS A CONTROLLED DOCUMENT.

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