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Diodes Incorporated ZMY20MTA
- Part No.:
- ZMY20MTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Linear, Compass (ICs)
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
ZMY20MTA.pdf
- Description:
- SENSOR MR ANALOG SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:1,854
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Product details
Overview
ZMY20MTA from Diodes Incorporated is a magneto-resistive magnetic field sensor with integrated permanent magnet, designed for precise measurement of the perpendicular magnetic field component Hy. It operates at 12 V supply, delivers bridge-based analog output proportional to Hy, and is housed in SOT223 package. Used in electronic compasses, linear/rotary position sensing, and navigation systems requiring high sensitivity and compact size.
For engineers reviewing the ZMY20MTA datasheet, ZMY20MTA pinout, ZMY20MTA application, or ZMY20MTA equivalent, key selection considerations include its internal Hx stabilization magnet, 12 V operation, Wheatstone bridge output topology, ±20 mT full-scale range, and AEC-Q200-qualified automotive suitability.
Technical Context
The ZMY20MTA implements a thin-film permalloy Wheatstone bridge structure on silicon die, where resistance changes under applied Hy generate differential voltage output. Its operation requires a fixed auxiliary field Hx (≈15–20 Oe), generated internally by a permanent magnet - eliminating external biasing components.
It functions as a uniaxial field sensor sensitive only to the Hy component orthogonal to both the chip surface and internal magnet orientation. Output is ratiometric to supply voltage, with typical sensitivity of 1.2 mV/V/Oe and offset voltage < ±10 mV at zero field.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 12 V DC - fixed rail required; output scales linearly with supply, enabling ratiometric measurement. |
| Full-Scale Range | ±20 mT - defines maximum measurable Hy before saturation; supports precision position detection up to ~10 mm air gap. |
| Sensitivity | 1.2 mV/V/Oe - yields ~14.4 mV/Oe at 12 V; enables sub-Oe resolution with 16-bit ADC. |
| Offset Voltage | ±10 mV max at 0 mT - sets minimum detectable field after nulling; impacts zero-field accuracy in compass calibration. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive use; performance stable across industrial ambient range. |
| Internal Magnet Field | Hx ≈ 15–20 Oe - provides built-in bias for permalloy bridge linearization; eliminates need for external magnets or coils. |
Pinout & Package
Package: SOT223 (4-pin, single-gull-wing leadform, thermal pad exposed on bottom). Pin 1 = V+, Pin 2 = V−, Pin 3 = Output+, Pin 4 = Output−. The thermal pad is electrically connected to Pin 2 (V−) and must be soldered to PCB ground plane for thermal stability and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Positive Supply (V+) | 12 V DC input; supplies bridge excitation; decoupling capacitor required within 10 mm. |
| Pin 2 | Negative Supply / Ground (V−) | Reference return for bridge and output; tied to thermal pad; must connect to low-impedance ground plane. |
| Pin 3 | Bridge Output Positive (OUT+) | Differential positive output; connects to instrumentation amplifier input; sensitive to EMI without shielding. |
| Pin 4 | Bridge Output Negative (OUT−) | Differential negative output; complements OUT+ for common-mode rejection; routing must mirror OUT+ trace length. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Permanent Magnet | Provides fixed Hx bias field (15–20 Oe), enabling single-axis Hy sensing without external field sources or complex PCB layout. |
| Wheatstone Bridge Topology | Delivers differential analog output proportional to Hy, supporting >60 dB common-mode noise rejection in noisy automotive environments. |
| SOT223 Thermal Pad | Exposed copper pad on underside improves thermal dissipation (θJA ≈ 90°C/W), critical for stable offset drift over temperature in engine bay applications. |
| AEC-Q200 Qualification Support | Manufactured in IATF 16949-certified facilities; PPAP-capable; meets stress test requirements for passive components in automotive electronics. |
Applications
| Electronic Compass | Linear Position Sensing |
|---|---|
Use Scenario: Detecting Earth's magnetic field direction in handheld or vehicle-mounted navigation units. IC Role / Device Role / Timing Role: Uniaxial magnetic field transducer measuring Hy component to resolve heading angle relative to magnetic north. Use Value: Internal Hx magnet ensures consistent bridge bias across temperature, reducing compass calibration frequency in portable devices. | Use Scenario: Measuring displacement of ferrous target in throttle valve or suspension position feedback. IC Role / Device Role / Timing Role: Analog magnetic field detector converting target distance into linear voltage output via field gradient mapping. Use Value: ±20 mT range and 1.2 mV/V/Oe sensitivity enable sub-millimeter resolution at 5–15 mm air gaps without signal conditioning. |
| Rotary Encoder | Automotive Pedal Position |
Use Scenario: Angular position tracking of rotating shaft using multi-pole ring magnet and fixed ZMY20MTA placement. IC Role / Device Role / Timing Role: Hy-axis field sensor capturing sinusoidal field variation as magnet rotates; outputs analog sine wave. Use Value: Differential output and ratiometric scaling simplify ADC interfacing in 12 V automotive ECUs with minimal external components. | Use Scenario: Monitoring accelerator or brake pedal travel in drive-by-wire systems. IC Role / Device Role / Timing Role: Redundant magnetic position sensor providing fail-safe analog feedback to powertrain controller. Use Value: −40°C to +125°C operating range and AEC-Q200-aligned manufacturing ensure reliability in safety-critical pedal actuation loops. |
Availability
ZMY20MTA is available at Aetrix Electronics and suitable for automotive position sensing, electronic compass modules, rotary encoder subsystems, and industrial motion control requiring stable component supply despite its discontinued status - limited legacy stock and last-time-buy support apply.
Supply support for ZMY20MTA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The ZMY20MTA belongs to Diodes' magnetic sensor product line, engineered specifically for contactless position and direction sensing in harsh environments where temperature stability, small footprint, and internal biasing are essential.
FAQ
What is the function of the internal magnet in the ZMY20MTA?
The internal permanent magnet generates a fixed auxiliary magnetic field Hx (~15–20 Oe) orthogonal to the sensing axis, biasing the permalloy Wheatstone bridge into its linear operating region. This eliminates the need for external magnets or field coils, simplifying mechanical design and improving thermal stability of sensitivity and offset.
Can the ZMY20MTA measure fields in both directions along the Hy axis?
Yes - the ZMY20MTA is a bipolar sensor with ±20 mT full-scale range. Its differential output voltage swings symmetrically above and below mid-supply (e.g., 6 V ± ~120 mV at 12 V supply) in response to positive and negative Hy fields, enabling bidirectional position or angle detection without polarity reversal hardware.
Is the ZMY20MTA pin-compatible with other Diodes magneto-resistive sensors?
No - the ZMY20MTA uses a unique 4-pin SOT223 configuration optimized for its internal magnet orientation and bridge layout. It is not pin-compatible with ZMY10, ZMY30, or AH-series sensors, which differ in pin count, package type, and internal bias architecture.
Why is the ZMY20MTA marked as obsolete, and are there engineering alternatives?
The ZMY20MTA was discontinued by Diodes Incorporated per DS33244 Rev. 3 (Nov. 2019) with no direct replacement offered. While functional alternatives exist (e.g., TLE493D-A2B6, MLX90393), they differ in interface (I²C vs. analog), supply voltage (3.3 V vs. 12 V), and internal biasing - requiring redesign of signal chain and mechanical mounting.
ZMY20MTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Magnetoresistive
- Axis:
- X, Y
- Output Type:
- Analog Voltage
- Sensing Range:
- -
- Voltage - Supply:
- 12V
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Resolution:
- -
- Bandwidth:
- -
- Operating Temperature:
- -25°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Features:
- Internal Magnet
- Supplier Device Package:
- SOT-223-3
- Mounting Type:
- Surface Mount
ZMY20MTA FAQ
1.How can I place an order for ZMY20MTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMY20MTA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ZMY20MTA reliable?
The price and inventory of ZMY20MTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMY20MTA is usually 5 days.
3.What payment methods are accepted for ZMY20MTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMY20MTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMY20MTA?
ZMY20MTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMY20MTA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ZMY20MTA?
For technical support, including ZMY20MTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMY20MTA requirements.
6.How does Aetrix verify that ZMY20MTA is sourced from the original manufacturer or authorized distributors?
All ZMY20MTA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZMY20MTA meets industry standards.
7.What is the process for return or replacement of ZMY20MTA?
All ZMY20MTA units undergo pre-shipment inspection (PSI). If there is an issue with ZMY20MTA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ZMY20MTA part is unused and in its original packaging.
Return procedure for ZMY20MTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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