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Diodes Incorporated ZXCT211QADW-7
- Part No.:
- ZXCT211QADW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
ZXCT211QADW-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT363 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
ZXCT211QADW-7 from Diodes Incorporated is an automotive-grade, zero-drift, high-precision current-sense amplifier with 500V/V fixed gain, ±30μV max offset voltage, and rail-to-rail output, designed for unidirectional or bidirectional current monitoring in high-voltage (up to 26V) automotive power systems including EV battery management and motor control.
For engineers reviewing the ZXCT211QADW-7 datasheet, ZXCT211QADW-7 pinout, ZXCT211QADW-7 application, or ZXCT211QADW-7 equivalent, this device supports low-side and high-side shunt sensing at 10mV full-scale drop, operates from -40°C to +125°C, and delivers <0.8% gain error over temperature with 10ppm/°C drift - critical for AEC-Q100 Grade 1 BMS and ADAS subsystems.
Technical Context
The ZXCT211QADW-7 implements a precision zero-drift chopper-stabilized architecture enabling ±30μV input offset and 0.1–0.5μV/°C offset drift across -40°C to +125°C. Its differential input stage accepts common-mode voltages from -0.3V to 26V while powered from only 2.7V–26V, decoupling measurement domain from supply constraints.
It features 95dB CMRR, 10ppm/°C gain drift, and 7kHz bandwidth (CL = 10pF), with rail-to-rail output swing (VOH = V+ – 0.05V, VOL = GND + 5mV) and 100μA max quiescent current - optimized for always-on, low-power automotive current telemetry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500V/V - scales 10mV shunt drop to 5V output, enabling full-scale ADC utilization with minimal power loss. |
| Offset Voltage (max) | ±30μV - ensures ≤6μA error at 10mV sense drop, critical for sub-1% accuracy in 0–200A EV battery monitoring. |
| Common-Mode Range | -0.3V to 26V - supports direct high-side sensing on 12V/24V vehicle rails without level-shifting circuitry. |
| Supply Voltage | 2.7V to 26V - allows single-supply operation from MCU I/O rail or main battery, eliminating auxiliary LDOs. |
| Quiescent Current | 100μA max - enables continuous current logging in sleep-mode vehicle modules without draining 12V battery. |
| Gain Error (A version) | ±0.8% over -40°C to +125°C - guarantees stable calibration across engine bay thermal cycling without software compensation. |
| CMRR | 95dB - rejects noise from adjacent high-current traces (e.g., inverter switching) during low-Vsense measurement. |
Pinout & Package
Package: SOT363 (6-pin, 2.15mm × 2.10mm × 0.95mm, moisture sensitivity Level 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Analog input | Bias reference for bidirectional sensing; sets output midpoint (e.g., V+/2) to enable ± current measurement. |
| 2 (GND) | Ground | Power and signal return path; must be low-impedance to minimize ground bounce in high-dI/dt environments. |
| 3 (V+) | Power supply | Single 2.7–26V supply input; bypass capacitor required near pin for stability under load transients. |
| 4 (IN+) | Analog input | Connects to supply side of shunt; high-impedance input minimizes loading on high-voltage rail. |
| 5 (IN−) | Analog input | Connects to load side of shunt; matched input bias currents preserve CMRR when external Rs ≤10Ω used. |
| 6 (OUT) | Analog output | Rail-to-rail voltage output proportional to load current; directly interfaces with 12-bit+ MCU ADCs. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures (-40°C to +125°C) and PPAP-capable production in IATF 16949 facilities. |
| Zero-drift architecture | Post-trim chopper design achieves ±30μV offset and 0.5μV/°C max drift - eliminates manual calibration in production. |
| 10mV full-scale shunt support | Enables use of low-value, low-power shunts (e.g., 0.5mΩ @ 20A) reducing heat generation and PCB area in EV OBC/BMS. |
| Rail-to-rail output | Swings within 50mV of V+ and 5mV of GND - maximizes dynamic range for 3.3V/5V ADCs without external level-shifting. |
| Wide common-mode range | -0.3V to 26V operation allows direct high-side sensing on 12V/24V battery rails, avoiding ground-loop errors in body control units. |
Applications
| EV Battery Management System (BMS) | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time monitoring of charge/discharge current in 400V traction battery packs during regenerative braking and fast charging. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting mV-level shunt voltage to precise analog output for MCU ADC sampling at 1–10kHz. Use Value: ±0.8% gain error and ±30μV offset ensure SOC estimation accuracy within ±0.5% over lifetime, meeting ISO 26262 ASIL-B requirements. |
Use Scenario: Load current supervision for smart fuses controlling lighting, HVAC, and window motors in centralized vehicle body electronics. IC Role / Device Role / Timing Role: Low-side current monitor feeding fault detection logic with <100μA quiescent draw to maintain always-on functionality. Use Value: 2.7V minimum supply enables operation directly from 3.3V MCU rail, eliminating dedicated current-sense LDO and reducing BOM count. |
| Electric Power Steering (EPS) | ADAS Camera Power Supply Monitoring |
|
Use Scenario: Torque-dependent motor phase current sensing in brushless EPS actuators, where rapid transient response prevents steering lag. IC Role / Device Role / Timing Role: High-bandwidth (7kHz) current amplifier with 0.4V/μs slew rate capturing 100A peak pulses during parking maneuvers. Use Value: 95dB CMRR rejects EMI from nearby inverter switching, maintaining <1% measurement error even during PWM commutation. |
Use Scenario: Input current verification for 12V–5V DC/DC converters powering radar and camera modules in forward collision warning systems. IC Role / Device Role / Timing Role: Unidirectional high-side monitor detecting overcurrent faults before ASIC damage occurs, with <10μs response time. Use Value: -0.3V to 26V common-mode range allows direct connection to DC/DC input rail without isolation, simplifying layout and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision automotive current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 100V common-mode, 20V/V gain, ±100μV offset, 2.7–5.5V supply only | Requires external gain stage for 10mV shunt; limited to low-voltage domains (e.g., MCU domain) | Select for ultra-high common-mode (>40V) or when lower gain suffices with higher shunt drops. |
| MAX40056ATA+T | 28V common-mode, 500V/V gain, ±125μV offset, 3.3–5.5V supply only, no REF pin | Not suitable for bidirectional sensing; lacks REF pin for mid-rail biasing in BMS applications | Select for unidirectional-only systems where supply is fixed 3.3V/5V and offset tolerance >100μV is acceptable. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the ZXCT211QADW-7 uniquely combines 500V/V gain, ±30μV offset, 2.7–26V supply, and REF pin flexibility - enabling single-chip, high-accuracy bidirectional sensing across full automotive voltage domains without external components.
Availability
ZXCT211QADW-7 is available at Aetrix Electronics and suitable for EV battery management systems, automotive body control modules, electric power steering units, and ADAS power monitoring requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle continuity.
Supply support for ZXCT211QADW-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF 16949-certified production facilities.
The ZXCT21xQ series targets automotive current sensing with AEC-Q100 Grade 1 qualification, zero-drift precision, and wide common-mode operation - specifically engineered for EV powertrain, chassis, and ADAS subsystems demanding high reliability and measurement fidelity.
FAQ
What is the maximum common-mode voltage the ZXCT211QADW-7 can measure?
The ZXCT211QADW-7 supports a common-mode input voltage range of -0.3V to 26V. This allows direct high-side current sensing on 12V and 24V automotive battery rails without external level-shifting circuitry, and accommodates negative transients down to -0.3V typical in load-dump conditions.
Can the ZXCT211QADW-7 be used for bidirectional current sensing?
Yes - by applying a stable bias voltage (e.g., V+/2) to the REF pin, the OUT pin swings symmetrically above and below that reference, enabling accurate measurement of both charge and discharge currents. The device's rail-to-rail output and matched input bias currents support this configuration without gain degradation.
What is the recommended shunt resistor value for a 200A full-scale measurement?
For 200A full-scale with 10mV shunt drop, use RSHUNT = 10mV / 200A = 50μΩ. With 500V/V gain, this yields 5V output at full scale - ideal for 5V ADCs. Ensure shunt power rating exceeds I²R = 2W, and place IN+/IN− traces symmetrically to minimize parasitic inductance.
Does the ZXCT211QADW-7 require external filtering for EMC robustness?
Input RC filters (RS ≤10Ω + CF) are recommended for noisy environments like motor drives. The datasheet specifies RS must not exceed 10Ω to avoid gain error from input bias current mismatch; typical values are 5Ω + 0.1μF to suppress high-frequency transients from shunt inductance without degrading bandwidth.
ZXCT211QADW-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
ZXCT211QADW-7 FAQ
1.How can I place an order for ZXCT211QADW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT211QADW-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 ZXCT211QADW-7 reliable?
The price and inventory of ZXCT211QADW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT211QADW-7 is usually 5 days.
3.What payment methods are accepted for ZXCT211QADW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT211QADW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT211QADW-7?
ZXCT211QADW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT211QADW-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 ZXCT211QADW-7?
For technical support, including ZXCT211QADW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT211QADW-7 requirements.
6.How does Aetrix verify that ZXCT211QADW-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT211QADW-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 ZXCT211QADW-7 meets industry standards.
7.What is the process for return or replacement of ZXCT211QADW-7?
All ZXCT211QADW-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT211QADW-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 ZXCT211QADW-7 part is unused and in its original packaging.
Return procedure for ZXCT211QADW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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