Product Overview
The CT812x series of bipolar tunnel magnetoresistance (TMR) digital latches are designed for consumer and industrial applications, offering superior sensing performance with Allegro's patented XtremeSense TMR technology and integrated CMOS process. These devices feature stable magnetic operation over a wide temperature range, ultra-low power consumption as low as 2.2 A, making them ideal for battery-operated products. They support magnetic fields down to 10 G, suitable for applications with large air gap requirements, and are available in an industry-standard 3-lead SOT-23 package for high-volume manufacturing.
Product Attributes
- Brand: Allegro MicroSystems
- Technology: XtremeSense TMR
- Material: Integrated CMOS process
- Package: 3-lead SOT-23
Technical Specifications
| Part Number | Operating Temp. Range (C) | Sensor Type | Output | BOP (G) | BRP (G) | fS | Package | Packing |
|---|---|---|---|---|---|---|---|---|
| CT8122AN-IS3 | 40 to 85 | Bipolar | Push-Pull | +10 | 10 | 500 Hz | 3-lead SOT23 | Tape and Reel |
| CT8122AN-HS3 | 40 to 125 | Bipolar | Push-Pull | +10 | 10 | 500 Hz | 3-lead SOT23 | Tape and Reel |
| CT8122AM-IS3 | 40 to 85 | Bipolar | Push-Pull | +10 | 10 | 2.5 kHz | 3-lead SOT23 | Tape and Reel |
| CT8122AM-HS3 | 40 to 125 | Bipolar | Push-Pull | +10 | 10 | 2.5 kHz | 3-lead SOT23 | Tape and Reel |
Key Electrical Characteristics
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage Range | VDD | 1.7 | 3.3 | 5.5 | V | |
| Average Supply Current (CT8122AN) | IDD(AVG) | t 10 seconds | 2.4 | 4.0 | A | |
| Average Supply Current (CT8122AN @ 1.8V) | IDD(AVG)_1.8V | t 10 seconds, VDD = 1.8 V | 2.2 | 2.8 | A | |
| Sampling Frequency (CT8122AN) | fS | 300 | 500 | 700 | Hz | |
| Average Supply Current (CT8122AM) | IDD(AVG) | t 10 seconds | 11.5 | 15.0 | A | |
| Average Supply Current (CT8122AM @ 1.8V) | IDD(AVG)_1.8V | t 10 seconds, VDD = 1.8 V | 10.5 | 12.0 | A | |
| Sampling Frequency (CT8122AM) | fS | 1.5 | 2.5 | 3.5 | kHz | |
| Power-On Time | tON | VDD 1.7 V | 50 | 75 | s | |
| Undervoltage Lockout Rising | VUVLO | Rising VDD | 1.60 | 1.64 | V | |
| Undervoltage Lockout Falling | VUVLO | Falling VDD | 1.44 | 1.53 | V |
2412061750_ALLEGRO-CT8122AM-HS3_C24763809.pdf
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