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Diodes Incorporated ZXCT213QBDW-7
- Part No.:
- ZXCT213QBDW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
ZXCT213QBDW-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT363 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ZXCT213QBDW-7 from Diodes Incorporated is an automotive-grade, zero-drift current-sense amplifier with 50V/V fixed gain, ±90μV max input offset voltage, rail-to-rail output swing, and operation over -40°C to +125°C. It measures shunt voltages as low as 10mV full-scale across common-mode voltages from -0.3V to 26V while drawing only 100μA quiescent current, enabling high-accuracy current monitoring in EV battery management systems and high-voltage DC/DC converters.
For engineers reviewing the ZXCT213QBDW-7 datasheet, ZXCT213QBDW-7 pinout, ZXCT213QBDW-7 application, or ZXCT213QBDW-7 equivalent, this device supports both high-side and low-side sensing configurations, delivers 80kHz bandwidth at 50× gain, maintains 10ppm/°C gain drift, and integrates AEC-Q100 Grade 1 qualification for automotive powertrain and ADAS subsystems.
Technical Context
The ZXCT213QBDW-7 employs a zero-drift chopper-stabilized architecture with post-trim calibration to achieve ±90μV max offset voltage and 0.5μV/°C typical offset drift over -40°C to +125°C. Its differential input stage operates with -0.3V to 26V common-mode range independent of 2.7V–26V supply voltage, allowing direct sensing on 12V/24V/48V rails without level-shifting.
It features rail-to-rail output capable of sourcing/sinking ±1mA into 10kΩ loads, 100dB CMRR (typical), and 80kHz small-signal bandwidth-optimized for real-time current feedback in motor control loops and bidirectional BMS charge/discharge monitoring when biased via the REF pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V fixed – scales 10mV shunt drop to 500mV output for ADC compatibility with 3.3V or 5V reference |
| Input Offset Voltage | ±90μV max – enables <0.1% error at 10mV full-scale shunt voltage, critical for low-current precision |
| Common-Mode Range | -0.3V to 26V – supports direct high-side sensing on 24V automotive batteries without external level shifters |
| Supply Voltage | 2.7V to 26V – powers from microcontroller LDO or main system rail; no separate bias supply needed |
| Quiescent Current | 100μA max – minimizes parasitic load in always-on vehicle modules like body controllers and OBC standby circuits |
| Bandwidth | 80kHz – sufficient for PWM motor current ripple rejection and fast transient detection in e-pump drivers |
| Gain Drift | 10ppm/°C max – ensures stable gain calibration over full automotive temperature range without software compensation |
Pinout & Package
Package: 6-pin SOT363 (2.15mm × 2.10mm × 0.95mm height), RoHS-compliant, halogen-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Analog input | Bias reference for bidirectional output swing; must be driven by low-impedance source (e.g., resistor divider from V+) |
| 2 (GND) | Ground | Power and signal return path; requires low-inductance connection to PCB ground plane |
| 3 (V+) | Power supply | Single 2.7V–26V supply input; bypass capacitor required between V+ and GND for stability |
| 4 (IN+) | Analog input | Connects to high-potential side of shunt resistor in high-side configuration or load side in low-side |
| 5 (IN−) | Analog input | Connects to low-potential side of shunt resistor; differential pair with IN+ defines sense voltage polarity |
| 6 (OUT) | Analog output | Voltage proportional to load current (VOUT = 50 × VSENSE + VREF); drives ADC input directly |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use up to +125°C ambient, PPAP-capable, manufactured in IATF 16949 facilities |
| Rail-to-rail output | Swings within 50mV of V+ and 5mV of GND at full load, maximizing dynamic range for 3.3V ADCs |
| Zero-drift architecture | Eliminates 1/f noise and thermal drift; achieves ±90μV offset stability over lifetime and temperature |
| 10mV full-scale shunt support | Reduces power loss in shunt resistor by 4× vs. 40mV designs, critical for high-efficiency EV inverters |
| 80kHz bandwidth at 50× gain | Enables accurate capture of 10kHz PWM current harmonics in motor drives without phase lag |
Applications
| EV On-Board Charger (OBC) | Battery Management System (BMS) |
|---|---|
|
Use Scenario: Monitoring AC-DC rectifier output current and DC-link charging current during bidirectional energy transfer. IC Role / Device Role / Timing Role: High-side current sensor feeding isolated ADC; REF pin biased to V+/2 for ±250mV output swing around mid-rail. Use Value: Enables precise charge/discharge current measurement with <0.2% total error across -40°C to +105°C, supporting ISO 6469 compliance. |
Use Scenario: Cell-level or pack-level current sensing during fast charging and regenerative braking in 400V/800V traction batteries. IC Role / Device Role / Timing Role: Low-side shunt monitor interfacing with MCU's 12-bit ADC; OUT directly connected with no amplification stage. Use Value: Delivers 10mV resolution at 100A full-scale using 100μΩ shunt, minimizing self-heating and thermal derating. |
| Electric Power Steering (EPS) | ADAS Camera Power Module |
|
Use Scenario: Real-time motor phase current feedback for torque control loop in 12V/48V EPS actuators. IC Role / Device Role / Timing Role: High-side current monitor placed between H-bridge and motor; outputs to MCU's hardware current-limit comparator input. Use Value: 80kHz bandwidth captures PWM ripple for instantaneous overcurrent shutdown (<2μs response), meeting ASIL-B functional safety requirements. |
Use Scenario: Input current supervision for 5V/3.3V camera rail in surround-view and driver-monitoring systems. IC Role / Device Role / Timing Role: Low-side current sensor detecting short-circuit or inrush faults; OUT triggers MCU GPIO interrupt on threshold exceedance. Use Value: 100μA quiescent current avoids loading always-on camera power domains; ±90μV offset ensures reliable 50mA fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 100V/V gain, ±10μV offset, 4V to 80V supply, SOIC-8 package | Higher common-mode range suits 48V/800V systems; larger footprint limits space-constrained modules | Select for >26V common-mode or tighter offset specs; avoid if SOT363 board area or 26V max rail applies |
| MAX40010FAUA+ | 50V/V gain, ±50μV offset, 2.7V–5.5V supply only, 6-pin μMAX | Lower supply range restricts use to low-voltage auxiliary rails; not suitable for direct 12V/24V sensing | Choose only when supply is strictly ≤5.5V and ultra-low offset is mandatory; verify VCM compatibility with shunt placement |
Compared with INA240A1QDRQ1 and MAX40010FAUA+, the ZXCT213QBDW-7 uniquely balances 26V common-mode tolerance, SOT363 compactness, and AEC-Q100 Grade 1 qualification-making it optimal for cost-sensitive, space-constrained 12V/24V automotive subsystems where supply voltage exceeds 5.5V.
Availability
ZXCT213QBDW-7 is available at Aetrix Electronics and suitable for EV on-board chargers, battery management systems, electric power steering modules, and ADAS camera power supervisors requiring stable component supply under AEC-Q100 compliance and IATF 16949 traceability.
Supply support for ZXCT213QBDW-7 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with manufacturing certified to IATF 16949 and AEC-Q100 standards.
The ZXCT21xQ series targets automotive current sensing with zero-drift precision, designed specifically for high-reliability powertrain, chassis, and electrification systems operating across extended temperature ranges.
FAQ
What is the maximum common-mode voltage the ZXCT213QBDW-7 can measure?
The ZXCT213QBDW-7 supports a common-mode input voltage range of -0.3V to 26V, meaning it can accurately sense current across shunt resistors placed on supply rails up to 26V-even when powered from a lower supply such as 3.3V or 5V. This eliminates need for external level-shifting circuitry in 12V and 24V automotive systems.
Can the ZXCT213QBDW-7 be used for bidirectional current sensing?
Yes-by applying a stable bias voltage (typically V+/2) to the REF pin, the output swings symmetrically around that reference, enabling measurement of current flow in both directions. This is essential for battery charge/discharge monitoring in BMS applications, and the device maintains ±90μV offset accuracy across the full -40°C to +125°C range.
What is the recommended shunt resistor value for a 100A full-scale measurement?
With 50V/V gain and 10mV full-scale shunt drop capability, a 100μΩ shunt yields 10mV at 100A (V = I × R = 100A × 100μΩ). This delivers 500mV output at full scale-ideal for 3.3V ADCs with 12-bit resolution (1.29mV/LSB), achieving ~15.6A resolution while minimizing shunt power loss (0.1W at 100A).
Does the ZXCT213QBDW-7 require external filtering for EMI robustness?
Input filtering is recommended in noisy environments: add matched resistors ≤10Ω in series with IN+ and IN−, plus a capacitor (e.g., 0.01–0.1μF) from each input to GND. This suppresses RF interference without degrading CMRR or introducing gain error-critical for motor drive and inverter applications where shunt inductance couples switching noise.
ZXCT213QBDW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- ZXCT21xQ
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.8%
- Voltage - Input:
- 2.7V ~ 26V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
ZXCT213QBDW-7 FAQ
1.How can I place an order for ZXCT213QBDW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT213QBDW-7 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 ZXCT213QBDW-7 reliable?
The price and inventory of ZXCT213QBDW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT213QBDW-7 is usually 5 days.
3.What payment methods are accepted for ZXCT213QBDW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT213QBDW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT213QBDW-7?
ZXCT213QBDW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT213QBDW-7 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 ZXCT213QBDW-7?
For technical support, including ZXCT213QBDW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT213QBDW-7 requirements.
6.How does Aetrix verify that ZXCT213QBDW-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT213QBDW-7 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 ZXCT213QBDW-7 meets industry standards.
7.What is the process for return or replacement of ZXCT213QBDW-7?
All ZXCT213QBDW-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT213QBDW-7, 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 ZXCT213QBDW-7 part is unused and in its original packaging.
Return procedure for ZXCT213QBDW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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