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Diodes Incorporated ZDS1009TA
- Part No.:
- ZDS1009TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SOT-223-8
- Datasheet:
-
ZDS1009TA.pdf
- Description:
- IC CURRENT MIRROR SM8
- Quantity:
- Payment:
- Shipping:
Inventory:3,434
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Product details
Overview
ZDS1009TA from Zetex plc is a complementary current mirror IC designed for high-side current sensing and level translation in battery charge management systems. It features ±1.45 V to ±1.75 V input voltage range, 0.99–1.01 V transfer accuracy at 5 V supply, 4 mV output zero-offset voltage, and operates across –55°C to +150°C. It is used in single-cell Li-ion fast chargers to translate high-side sense resistor voltage to low-side referenced control signals.
For engineers reviewing the ZDS1009TA datasheet, ZDS1009TA pinout, ZDS1009TA application, or ZDS1009TA equivalent, key selection criteria include high-side sensing capability, temperature-stable current mirroring (±10 µA leakage at 30 V), breakdown voltage ratings up to 120 V (BVY1-X1), and SM-8 (SOT-223-8) package compatibility with PCB thermal management.
Technical Context
The ZDS1009TA implements a matched NPN/PNP transistor pair architecture enabling bidirectional current mirroring with inherent temperature tracking. Its dual-input, dual-output topology supports both sourcing and sinking configurations via four dedicated terminals (Y1, X1, E1–E4), allowing flexible integration into feedback loops of DC-DC chargers and motor controllers.
It performs level translation without external op-amps by directly referencing sensed voltage across a high-side shunt to ground-referenced control circuitry. Input voltage compliance is defined separately for Y1–E2/E3 and X1–E1/E4 paths, supporting asymmetric biasing critical for precision current monitoring in multi-cell battery systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Transfer Accuracy | 0.99–1.01 V at VCC = 5 V, R1=R3=R4=100 Ω - enables <1% gain error in closed-loop charger feedback |
| Zero-Offset Voltage | 4 mV - sets minimum resolvable current for sub-10 mA sensing applications |
| Input Voltage Range | ±1.45 V to ±1.75 V - accommodates typical 100 mΩ shunt drops up to ±175 mA |
| Breakdown Voltage (Y1–X1) | 120 V - supports high-voltage battery stacks and industrial power rails |
| Leakage Current (Y1) | 10 µA at VY1–E3 = 30 V - ensures stable operation under high common-mode voltage |
| Operating Temperature | –55°C to +150°C - qualified for automotive under-hood and industrial motor drive environments |
| Power Dissipation | 2 W at Tamb = 25°C on 2″² copper - defines thermal design margin for continuous 1 A operation |
Pinout & Package
The ZDS1009TA is housed in an SM-8 package - identical to SOT-223-8 - featuring exposed thermal pad and 8 leads in standard gull-wing configuration. Package dimensions: 6.5 mm × 3.5 mm × 7.0 mm (L × W × H), with 4.59 mm lead pitch (e1) and 1.53 mm center lead pitch (e2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Y1 | High-side NPN collector / primary current input | Accepts high-voltage side of sense resistor; rated to 120 V breakdown |
| X1 | High-side PNP collector / secondary current input | Complements Y1 for bidirectional current sensing; rated to –30 V breakdown |
| E1, E2 | NPN emitter pair / low-side reference outputs | Provide mirrored, level-translated output referenced to system ground |
| E3, E4 | PNP emitter pair / auxiliary low-side outputs | Enable differential or dual-path feedback; support polarity reversal in motor control |
Key Features
| Feature | Design Value |
|---|---|
| Temperature tracking | Matched NPN/PNP die structure minimizes drift over –55°C to +150°C, critical for Li-ion charger accuracy across ambient conditions |
| High-side sensing | Direct interface to shunt resistor placed between battery+ and load, eliminating need for isolated amplifiers or gate drivers |
| Four-terminal isolation | Separate Y1/X1 inputs and E1–E4 outputs prevent ground loop coupling in multi-rail systems |
| Compact implementation | SM-8 footprint replaces discrete transistor arrays and op-amp circuits, reducing BOM count and layout area by >60% |
Applications
| Battery Charge Management | DC Motor Control |
|---|---|
Use Scenario: Fast charging of single-cell Li-ion batteries using synchronous buck converter with high-side current feedback. IC Role / Device Role / Timing Role: High-side current mirror translating shunt voltage to ground-referenced error signal for PWM controller. Use Value: Enables accurate current regulation without optocouplers or isolated amplifiers, reducing cost and board space. | Use Scenario: Bidirectional current monitoring in H-bridge motor drivers for overcurrent protection and torque estimation. IC Role / Device Role / Timing Role: Dual-path current mirror providing polarity-aware feedback to microcontroller ADC inputs. Use Value: Supports real-time direction-sensitive current measurement with <4 mV offset, improving stall detection reliability. |
| Lead-Acid System Monitoring | Industrial Overcurrent Protection |
Use Scenario: Multi-cell lead-acid battery bank supervision in UPS or solar charge controllers. IC Role / Device Role / Timing Role: Level-translating current sensor interfacing high-voltage battery stack to low-voltage MCU monitoring circuit. Use Value: Withstands 120 V Y1–X1 breakdown, enabling direct connection to 24 V/48 V systems without external voltage dividers. | Use Scenario: Real-time overcurrent detection in industrial 24 V DC power distribution panels. IC Role / Device Role / Timing Role: High-speed current mirror feeding comparator threshold circuit for sub-100 ns trip response. Use Value: Leakage <10 µA at 30 V ensures stable baseline under high common-mode noise, minimizing false trips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current mirror applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | Integrated high-side current sense amplifier with 20 V common-mode range, fixed 20× gain, no discrete mirroring topology | Limited to ≤20 V systems; lacks bidirectional capability and 120 V breakdown | Select when gain stability and integrated reference outweigh need for ultra-high voltage tolerance |
| LT6105IMS8#TRPBF | High-side current sense amplifier with 60 V common-mode, rail-to-rail output, 125 kHz bandwidth | No complementary transistor architecture; lower voltage rating restricts use in >48 V battery systems | Prefer for wide-bandwidth analog feedback where precision offset (<50 µV) matters more than breakdown robustness |
Compared with MAX4080TASA+ and LT6105IMS8#TRPBF, the ZDS1009TA delivers unmatched 120 V Y1–X1 breakdown and true complementary mirroring-enabling direct integration into high-voltage battery stacks and bidirectional motor control without external level-shifting components.
Availability
ZDS1009TA is available at Aetrix Electronics and suitable for battery charge management, DC motor control, lead-acid system monitoring, and industrial overcurrent protection requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for ZDS1009TA 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
Zetex plc (now part of Diodes Incorporated) was a UK-based analog semiconductor specialist focused on high-performance discrete and analog ICs for power management and sensing.
The ZDS1009TA belongs to Zetex's precision current sensing product line, engineered specifically for high-side, level-translating current mirror applications in battery-powered and industrial power systems.
FAQ
What is the maximum continuous current the ZDS1009TA can handle?
The ZDS1009TA supports 1 A continuous current across its E1–E4 and E2–E3 terminals, as specified in Absolute Maximum Ratings. This rating assumes operation within the –55°C to +150°C junction temperature range and proper PCB thermal management with ≥2 inch² copper area per the datasheet derating curve.
Does the ZDS1009TA require external resistors for basic operation?
Yes - the ZDS1009TA requires external resistors R1, R3, and R4 (typically 100 Ω each) to set gain and bias points, as shown in the Typical Application Circuit. R2 is the user-defined high-side sense resistor; its value determines full-scale current range and sensitivity (e.g., 100 mΩ yields 100 mV/A).
Can the ZDS1009TA be used for AC current sensing?
No - the ZDS1009TA is optimized for DC and low-frequency (<10 kHz) current sensing due to its bipolar transistor architecture and lack of specified AC bandwidth. Its frequency response rolls off above 100 kHz, making it unsuitable for switching-node current sampling or high-frequency motor phase current measurement.
Is the SM-8 package thermally enhanced compared to standard SOT-223?
Yes - the SM-8 package incorporates an exposed thermal pad aligned with the die attach area, enabling significantly better heat dissipation than standard 3-lead SOT-223. When soldered to ≥2 inch² of 2 oz copper, it achieves the rated 2 W power dissipation at 25°C ambient, as verified in Zetex's thermal characterization data.
ZDS1009TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-223-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Current Mirror
- Sensing Method:
- High-Side
- Accuracy:
- -
- Voltage - Input:
- 120V (Max)
- Current - Output:
- 1A
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SM8
ZDS1009TA FAQ
1.How can I place an order for ZDS1009TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZDS1009TA 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 ZDS1009TA reliable?
The price and inventory of ZDS1009TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZDS1009TA is usually 5 days.
3.What payment methods are accepted for ZDS1009TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZDS1009TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZDS1009TA?
ZDS1009TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZDS1009TA 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 ZDS1009TA?
For technical support, including ZDS1009TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZDS1009TA requirements.
6.How does Aetrix verify that ZDS1009TA is sourced from the original manufacturer or authorized distributors?
All ZDS1009TA 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 ZDS1009TA meets industry standards.
7.What is the process for return or replacement of ZDS1009TA?
All ZDS1009TA units undergo pre-shipment inspection (PSI). If there is an issue with ZDS1009TA, 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 ZDS1009TA part is unused and in its original packaging.
Return procedure for ZDS1009TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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