Description

The AH211 is an integrated Hall sensor with output driver and frequency generator designed for electronic commutation of brush-less DC motor applications. Thedevice includes an on-chip Hall sensor for magnetic sensing, an amplifier that amplifies the Hall voltage, a Schmitt trigger to provide switching hysteresis for noise rejection, a temperature compensation circuit to compensate the temperature drift of Hall sensitivity, two complementary open-collector drivers for sinking large load current. It also includes an internal band-gap regulator which is used to provide bias voltage for internal circuits. Place the device in a variable magnetic field, while the magnetic flux density is larger than threshold BOP, DO will be turned on (low) and DOB (and FG) will be turned off (high). This output state is held till the magnetic flux density reversal falls below BRP causing DO to be turned off (high) and DOB (and FG) turned on (low).

Feature(s)

· On-Chip Hall Sensor · 3.5V to 16V Supply Voltage · 400mA (avg) Output Sink Current · -20oC to 85oC Operating Temperature · Built-in FG Output · Low Profile TO-94 (SIP-4L) Package · ESD Rating: 600V (Machine Model)

Application(s)

· Dual-Coil Brushless DC Motor · Dual-Coil Brushless DC Fan · Revolution Counting · Speed Measurement

Specifications & Technical Documents

Product Parameters

Operating Voltage (V)	3.5 to 16 V
SupplyCurrent (mA)	4 mA
Average OutputDrive Current (mA)	400 mA
Peak Output Current (mA)	800 mA
Typical Total R_DS(ON)(NMOS and PMOS Combined)	2.6 @ 14V Ω
Typical Zener Breakdown Voltage (V)	31 V
Operating Point Bop Gauss (Min)	5, 0
Operating Point Bop Gauss (Typ)	30, 0
Operating Point Bop Gauss (Max)	60, 90
Release Point Brp Gauss (Min)	-60, -90
Release Point Brp Gauss (Typ)	-30, 0
Release Point Brp Gauss (Max)	-5, -
Lock Detect, Shut-Down and Auto Start	-
Frequency Generator (FG) and Rotation Detect	FG RD
Operating Ambient Temperature (°C)	-20 to 85 °C

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products
PCN-2654	2024-02-15	2024-04-28	Device End of Life (EOL)
PCN-2527	2021-06-09	2021-09-09	Additional Wafer Source (GFAB, JKFAB), New Bill of Materials (BOM) with PdCu Bond Wire, and Additional Assembly/Test (A/T) Site (CAT)

AH211 (Obsolete)