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Diodes Incorporated ZXCT212BDW-7
- Part No.:
- ZXCT212BDW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
ZXCT212BDW-7.pdf
- Description:
- CM VOLTAGE OUTPUT SOT363 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
ZXCT212BDW-7 from Diodes Incorporated is a zero-drift, high-precision current-sense amplifier with 1000V/V fixed gain, designed for unidirectional or bidirectional current monitoring across shunt resistors at common-mode voltages up to 26V. It delivers ±30μV max input offset voltage, ±0.8% max gain error over temperature, and rail-to-rail output swing while operating from 2.7V–26V supply. Used in server power rails and battery management systems for accurate low-side/high-side sensing.
For engineers reviewing the ZXCT212BDW-7 datasheet, ZXCT212BDW-7 pinout, ZXCT212BDW-7 application, or ZXCT212BDW-7 equivalent, key selection criteria include its 1000V/V gain, -0.3V to 26V common-mode range, 10mV full-scale shunt capability, zero-drift architecture for <0.5μV/°C drift, and SOT363 package compatibility with space-constrained PCB layouts.
Technical Context
The ZXCT212BDW-7 employs a chopper-stabilized zero-drift amplifier architecture to maintain ±30μV max offset and 10ppm/°C max gain drift across -40°C to +125°C. Its differential input stage supports common-mode voltages extending 0.3V below ground and up to the 26V supply rail, enabling direct measurement on high-voltage power rails without level-shifting.
It features rail-to-rail output drive into 10kΩ loads, 4kHz bandwidth (CL = 10pF), and 25nV/√Hz input voltage noise. The REF pin accepts an external bias voltage to support bidirectional current sensing, while internal post-trim calibration ensures guaranteed gain accuracy and long-term stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 1000V/V - Converts 10mV shunt drop to 10V output, enabling high-resolution ADC digitization of large load currents. |
| Input Offset Voltage | ±30μV max - Enables accurate measurement of sub-10mV sense voltages, critical for low-power-loss shunt designs. |
| Common-Mode Range | -0.3V to 26V - Allows direct connection to 24V industrial rails or battery terminals without attenuation or isolation. |
| Supply Voltage | 2.7V to 26V - Powers from low-voltage microcontrollers (3.3V) while monitoring high-side 12V/24V bus currents. |
| Quiescent Current | 100μA max - Minimizes system power overhead in always-on monitoring applications like BMS standby mode. |
| Gain Error | ±0.8% max over -40°C to +125°C - Ensures consistent current scaling across automotive and industrial thermal environments. |
| CMRR | 95dB min - Rejects noise from noisy switching power supplies when measuring current in DC-DC converter outputs. |
Pinout & Package
Package: SOT363 (6-pin, 2.1mm × 2.0mm × 1.1mm, moisture sensitivity level 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Analog input | Reference bias point for output centering; sets zero-current output voltage (e.g., V+/2 for bidirectional sensing). |
| 2 - GND | Ground | Power and signal reference return; must be low-impedance path to minimize ground bounce errors. |
| 3 - V+ | Power supply | Single 2.7V–26V supply input; bypass capacitor required between V+ and GND for stability. |
| 4 - IN+ | Differential input | Connects to high-potential side of shunt resistor; matched layout critical for CMRR performance. |
| 5 - IN− | Differential input | Connects to low-potential side of shunt resistor; trace symmetry with IN+ minimizes thermal EMF errors. |
| 6 - OUT | Analog output | Voltage proportional to load current (VOUT = ILOAD × RSENSE × 1000 + VREF); drives ADC inputs directly. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | 0.1–0.5μV/°C offset drift - Maintains calibration integrity over wide ambient and self-heating conditions in enclosed enclosures. |
| Rail-to-rail output | Swings within 50mV of V+ and 5mV of GND - Maximizes dynamic range for 3.3V or 5V ADCs without external level-shifting. |
| 10mV full-scale shunt support | Enables ≤0.1W power loss at 10A - Reduces thermal derating needs and improves efficiency in high-current power supplies. |
| Post-trim manufacturing | Guarantees ±0.8% gain error over temperature - Eliminates need for system-level gain calibration in production test. |
| High CMRR (95dB) | Rejects >99.997% of common-mode noise - Critical for accurate current reading in buck converter output stages with fast dV/dt edges. |
Applications
| Server Power Rail Monitoring | Battery Management Systems |
|---|---|
|
Use Scenario: Real-time current monitoring on 12V/48V server motherboard VRM output rails to detect overcurrent faults and optimize thermal throttling. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting shunt voltage to precise analog output for host MCU ADC sampling at 1–10kHz. Use Value: ±0.8% gain accuracy and -40°C to +125°C operation ensure reliable fault detection across datacenter thermal zones without recalibration. |
Use Scenario: Bidirectional current sensing in lithium-ion battery packs during charge/discharge cycles to compute state-of-charge and detect cell imbalance. IC Role / Device Role / Timing Role: Precision current transducer with REF-biased output enabling single-supply MCU ADC to resolve ±50A flow direction and magnitude. Use Value: 1000V/V gain and ±30μV offset allow 10mΩ shunt use, minimizing pack resistance while maintaining <1% total measurement error over lifetime. |
| Industrial PLC I/O Modules | High-Performance GPU Power Delivery |
|
Use Scenario: Analog input module measuring 4–20mA loop current or motor phase current in factory automation controllers. IC Role / Device Role / Timing Role: Isolated-side current monitor interfacing with shunt on 24V field bus, feeding isolated sigma-delta ADC. Use Value: -0.3V to 26V common-mode range accommodates negative transients and ground offsets typical in industrial wiring environments. |
Use Scenario: Per-phase current monitoring on PCIe Gen5 GPU VRMs where rapid load transients demand fast, accurate current feedback for adaptive voltage scaling. IC Role / Device Role / Timing Role: Low-latency current sensor with 4kHz bandwidth providing real-time feedback to digital PWM controllers. Use Value: 25nV/√Hz noise density and 10ppm/°C gain drift preserve measurement fidelity during GPU boost clocks and thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-gain current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 500V/V gain, ±10μV offset, AEC-Q100 qualified, SOIC-8 package | Automotive-grade; requires external gain-setting resistors for 1000V/V configuration | Select for automotive BMS where AEC-Q100 compliance is mandatory and board area allows SOIC-8. |
| MAX4080TASA+ | 1000V/V gain, ±100μV offset, 2.7V–76V supply, 8-pin SOIC | Wider supply range but higher offset; no zero-drift architecture | Select when monitoring >26V rails (e.g., 48V telecom) and ±100μV offset is acceptable for system accuracy budget. |
Availability
ZXCT212BDW-7 is available at Aetrix Electronics and suitable for server power rail monitoring, battery management systems, industrial PLC I/O modules, and high-performance GPU power delivery requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for ZXCT212BDW-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 ICs, with emphasis on power management, signal integrity, and precision analog solutions.
ZXCT21x belongs to Diodes' precision current-sense amplifier product line, engineered for high-accuracy, low-power, wide common-mode current monitoring in computing, industrial, and battery-powered systems.
FAQ
What is the maximum shunt voltage the ZXCT212BDW-7 can accurately measure?
The ZXCT212BDW-7 is specified for full-scale shunt drops of 10mV, meaning it delivers a nominal output of 10V (at VREF = 0V) for 10mV input. With rail-to-rail output and 2.7V–26V supply, it maintains linearity up to ±10mV differential input under recommended operating conditions, supporting shunt resistances as low as 1mΩ at 10A.
Can the ZXCT212BDW-7 be used for bidirectional current sensing?
Yes-by applying a bias voltage (e.g., V+/2) to the REF pin, the output swings above and below that reference in proportion to current direction and magnitude. The device's rail-to-rail output and ±0.3V to 26V common-mode range enable true bidirectional operation without external op-amps or level shifters, as confirmed in Figure 20 of DS45449 Rev. 3-2.
Does the ZXCT212BDW-7 require external compensation components?
No external compensation is needed for basic operation. However, input RC filters (RS ≤ 10Ω + CF) are recommended in noisy or high-dI/dt environments to suppress shunt inductance-induced ringing. The datasheet specifies that added series resistance >10Ω degrades CMRR and introduces gain error due to input bias current mismatch.
How does the zero-drift architecture improve long-term reliability in industrial applications?
The chopper-stabilized zero-drift design reduces offset drift to ≤0.5μV/°C and eliminates 1/f noise, ensuring measurement stability over time and temperature without recalibration. This is validated by Diodes' 1000-hour HTOL testing showing <30μV long-term VOS drift at +125°C-critical for unattended industrial equipment with 10+ year service life.
ZXCT212BDW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- ZXCT21x
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
ZXCT212BDW-7 FAQ
1.How can I place an order for ZXCT212BDW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT212BDW-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 ZXCT212BDW-7 reliable?
The price and inventory of ZXCT212BDW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT212BDW-7 is usually 5 days.
3.What payment methods are accepted for ZXCT212BDW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT212BDW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT212BDW-7?
ZXCT212BDW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT212BDW-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 ZXCT212BDW-7?
For technical support, including ZXCT212BDW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT212BDW-7 requirements.
6.How does Aetrix verify that ZXCT212BDW-7 is sourced from the original manufacturer or authorized distributors?
All ZXCT212BDW-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 ZXCT212BDW-7 meets industry standards.
7.What is the process for return or replacement of ZXCT212BDW-7?
All ZXCT212BDW-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT212BDW-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 ZXCT212BDW-7 part is unused and in its original packaging.
Return procedure for ZXCT212BDW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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