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Diodes Incorporated ZXCT1087QE5TA
- Part No.:
- ZXCT1087QE5TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ZXCT1087QE5TA.pdf
- Description:
- IC CURRENT MONITOR 2% SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:915
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Product details
Overview
ZXCT1087QE5TA from Diodes Incorporated is an automotive-grade, fixed-gain, high-side current monitor IC in SOT25 package, designed for unipolar load current sensing without ground-plane disruption. It features 40V max common-mode input voltage, 50× VSENSE gain (VOUT = 50 × VSENSE), ±3 mV input offset voltage over temperature, and 0.6 µA quiescent current - enabling precision battery management and overcurrent protection in 12V/24V automotive systems.
For engineers reviewing the ZXCT1087QE5TA datasheet, ZXCT1087QE5TA pinout, ZXCT1087QE5TA application, or ZXCT1087QE5TA equivalent, this device delivers AEC-Q100 Grade 1 qualified performance for high-reliability automotive current monitoring where supply rejection (80–100 dB PSRR), common-mode rejection (80–100 dB CMRR), and operation from −40°C to +125°C are critical.
Technical Context
The ZXCT1087QE5TA implements a precision voltage-output current sense amplifier with fixed 50 V/V gain, optimized for high-side placement between VSUPPLY and load. Its input stage operates independently of VCC, supporting wide common-mode range (2.7V to 40V) while maintaining low input bias current (≤5 µA) and minimal offset drift (±4 µV/K).
It uses a rail-to-rail output stage referenced to VS−, delivering VOUT = 50 × VSENSE across 0–0.5 V differential input, with 200 kHz small-signal bandwidth and 7 µs 0.1% settling time - suitable for real-time fault detection in automotive power distribution modules and battery disconnect units.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 50 V/V - enables direct scaling of 20 mV sense voltage to 1 V output for ADC interfacing. |
| Common-Mode Input Range | 2.7 V to 40 V - supports monitoring in 24 V industrial and 12 V automotive rails without level-shifting. |
| Input Offset Voltage | ±3 mV max over −40°C to +125°C - ensures ≤6% full-scale error at 50 mV sense voltage. |
| Quiescent Current | 0.6 µA typical - minimizes parasitic loading on high-impedance sense resistors and extends system standby life. |
| PSRR / CMRR | 80–100 dB - rejects supply noise and common-mode transients during load dump or alternator ripple events. |
| Bandwidth | 200 kHz (−3 dB) - captures fast overcurrent events such as short-circuit turn-on in motor drivers. |
| Operating Temperature | −40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood automotive deployment. |
Pinout & Package
SOT25 (5-pin SC-74A) package with gull-wing leads, RoHS-compliant, halogen-free, and lead-free construction. Dimensions: 2.80 mm × 1.60 mm × 1.10 mm (L × W × H), 0.95 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Voltage output terminal | Delivers VOUT = 50 × VSENSE; rail-to-rail swing down to VS− − 0.8 V supports low-voltage microcontroller ADC inputs. |
| 2 GND | Analog ground reference | Provides internal bias reference; must be connected to system ground with low-inductance path to minimize noise coupling. |
| 3 S+ | High-side sense input (+) | Connects directly to VSUPPLY side of sense resistor; withstands up to 45 V absolute max, supports wide common-mode range. |
| 4 S− | High-side sense input (−) | Connects directly to load side (VLOAD) of sense resistor; differential input accepts up to ±800 mV, limiting sense resistor voltage drop. |
| 5 VCC | Analog supply input | Powers internal circuitry; operates from 2.7 V to 40 V, independent of S+/S− common-mode voltage for flexible biasing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use with PPAP support, ensuring reliability in safety-critical power monitoring applications. |
| Fixed 50× gain architecture | Eliminates external gain-setting resistors, reducing BOM count and layout sensitivity versus adjustable variants like ZXCT1082Q. |
| Ultra-low quiescent current | 0.6 µA enables integration into always-on battery monitoring circuits without compromising standby current budgets. |
| High PSRR and CMRR | ≥80 dB rejection of supply ripple and common-mode noise ensures stable output during engine cranking or load dump events. |
| Rail-to-rail output referenced to VS− | Allows direct interface with 3.3 V or 5 V ADCs even when sensing at high common-mode voltages (e.g., 24 V bus). |
Applications
| Automotive Battery Management | Engine Control Unit (ECU) Power Monitoring |
|---|---|
|
Use Scenario: Real-time monitoring of 12 V starter battery discharge/charge current during cold-cranking and regenerative braking. IC Role / Device Role / Timing Role: High-side current sensor providing analog output to ECU's ADC for state-of-charge estimation and fault logging. Use Value: 50× gain and ±3 mV offset ensure <1% measurement error at 10 A through 10 mΩ shunt, supporting ISO 16750-2 load dump immunity. |
Use Scenario: Continuous supervision of ECU main power rail (24 V) for overcurrent detection during actuator activation. IC Role / Device Role / Timing Role: Fault-detection front-end that triggers shutdown within 7 µs upon >15 A surge, preventing MOSFET failure. Use Value: 200 kHz bandwidth and 0.6 µA IQ enable fast response without adding standby power penalty in always-on control modules. |
| Electric Power Steering (EPS) Motor Driver | Commercial Vehicle Body Control Module (BCM) |
|
Use Scenario: Phase-current sensing in 48 V EPS inverters to detect winding shorts or phase imbalance during torque assist. IC Role / Device Role / Timing Role: High-side monitor placed between DC-link and IGBT half-bridge, feeding isolated amplifier or MCU. Use Value: 40 V common-mode range accommodates 48 V nominal bus with 100 V transient tolerance; 80–100 dB CMRR suppresses PWM switching noise. |
Use Scenario: Load-current verification for lighting, HVAC, and window lift subsystems in Class 8 trucks operating at −40°C to +125°C ambient. IC Role / Device Role / Timing Role: System-level current supervisor reporting via CAN bus after analog-to-digital conversion. Use Value: AEC-Q100 Grade 1 rating and SOT25 thermal resistance (θJA ≈ 200°C/W) ensure long-term stability in sealed, convection-limited enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | 50 V/V gain, 2.7–76 V common-mode, 125 kHz bandwidth, higher IQ (1.1 mA) | Supports wider voltage range but consumes ~1800× more quiescent current - unsuitable for battery-backed systems. | Select for 48 V+ industrial systems where bandwidth margin is critical and standby power is not constrained. |
| TSC1021IYPT | 20 V/V fixed gain, 4.5–28 V supply, 1 MHz bandwidth, ±1 mV offset, SO-8 package | Limited to 28 V common-mode; requires external gain stage for 50× scaling; larger footprint than SOT25. | Choose when higher bandwidth is needed and board space allows SO-8; avoid for 40 V automotive rails. |
Compared with MAX4080TASA+ and TSC1021IYPT, ZXCT1087QE5TA uniquely balances ultra-low IQ (0.6 µA), AEC-Q100 Grade 1 compliance, 40 V common-mode capability, and SOT25 compactness - making it optimal for space-constrained, always-on automotive current sensing where power efficiency and qualification rigor are non-negotiable.
Availability
ZXCT1087QE5TA is available at Aetrix Electronics and suitable for automotive battery management, engine control unit (ECU) power monitoring, and electric power steering (EPS) motor driver applications requiring stable component supply across extended temperature and qualification-critical production cycles.
Supply support for ZXCT1087QE5TA 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, specializing in high-reliability components for automotive, industrial, and computing markets.
ZXCT1087QE5TA belongs to the ZXCT108xQ automotive current monitor product line, engineered specifically for AEC-Q100 Grade 1 high-side sensing in harsh-environment vehicle subsystems - emphasizing low IQ, wide common-mode range, and robust noise immunity.
FAQ
What is the maximum allowable sense resistor voltage drop for ZXCT1087QE5TA?
The ZXCT1087QE5TA specifies a maximum differential input voltage (VS+ − VS−) of ±800 mV per Absolute Maximum Ratings. However, Recommended Operating Conditions limit VSENSE to 0–0.5 V for guaranteed linearity and accuracy. Exceeding 500 mV risks gain compression and increased offset error, especially at temperature extremes.
Can ZXCT1087QE5TA be used with a 48 V nominal automotive system?
No - ZXCT1087QE5TA has a 40 V maximum common-mode input voltage and 45 V absolute maximum rating on S+/S− pins. For 48 V systems, use ZXCT1086QE5TA (60 V rated) or verify transient clamping with external TVS diodes, though AEC-Q100 compliance would no longer be assured beyond datasheet limits.
How does the output reference work, and what is its voltage range?
ZXCT1087QE5TA's OUT pin is referenced to VS− (the S− terminal), not GND. Its output swings from VS− − 1 V to VS− − 0.8 V minimum, allowing direct connection to ADCs referenced to the same VS− node. This eliminates level-shifting in high-side configurations where VS− floats above ground.
Is external filtering required for accurate current measurement?
Not inherently - the device includes internal filtering optimized for 200 kHz bandwidth and 7 µs settling. However, for noisy environments (e.g., PWM motor drives), a 10 nF capacitor from S+ to S− near the sense resistor reduces RF pickup, and a 100 pF capacitor from OUT to GND improves ADC sampling stability without affecting dynamic response.
ZXCT1087QE5TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- ±2%
- Voltage - Input:
- 2.7V ~ 40V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
ZXCT1087QE5TA FAQ
1.How can I place an order for ZXCT1087QE5TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXCT1087QE5TA 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 ZXCT1087QE5TA reliable?
The price and inventory of ZXCT1087QE5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT1087QE5TA is usually 5 days.
3.What payment methods are accepted for ZXCT1087QE5TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT1087QE5TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXCT1087QE5TA?
ZXCT1087QE5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXCT1087QE5TA 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 ZXCT1087QE5TA?
For technical support, including ZXCT1087QE5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT1087QE5TA requirements.
6.How does Aetrix verify that ZXCT1087QE5TA is sourced from the original manufacturer or authorized distributors?
All ZXCT1087QE5TA 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 ZXCT1087QE5TA meets industry standards.
7.What is the process for return or replacement of ZXCT1087QE5TA?
All ZXCT1087QE5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT1087QE5TA, 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 ZXCT1087QE5TA part is unused and in its original packaging.
Return procedure for ZXCT1087QE5TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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