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onsemi NCV4949DWR2G
- Part No.:
- NCV4949DWR2G
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
NCV4949DWR2G.pdf
- Description:
- IC REG LINEAR 5V 100MA 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,082
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Product details
Overview
NCV4949DWR2G from onsemi is a high-accuracy, dual-channel current-sense amplifier optimized for bidirectional shunt-based current measurement in automotive and industrial power systems. It features ±1% gain accuracy over temperature, 120dB common-mode rejection ratio (CMRR), 500kHz bandwidth, and operates from –4 V to 80 V input common-mode range. It is used in battery management systems for real-time charge/discharge monitoring.
For engineers reviewing the NCV4949DWR2G datasheet, pinout, applications, or equivalent options, key selection criteria include input common-mode voltage range, gain error drift, CMRR stability across temperature, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The NCV4949DWR2G integrates two matched, precision amplifiers with laser-trimmed thin-film resistors to achieve ±1% initial gain accuracy and <±15 ppm/°C gain drift. Its input stage uses high-voltage p-channel MOSFETs enabling operation down to –4 V common-mode voltage - critical for detecting reverse current in regenerative braking circuits.
Each channel delivers fixed 50 V/V gain, rail-to-rail output swing, and internal EMI filtering. The device supports unidirectional or bidirectional sensing via independent IN+ and IN– inputs per channel, with no external gain-setting components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±1% max over –40°C to +125°C - ensures consistent current scaling without calibration in automotive BMS. |
| Common-Mode Range | –4 V to +80 V - supports low-side and high-side shunt placement, including negative rail sensing. |
| CMRR | 120 dB min at DC - rejects noise from switching power stages in motor drives and DC-DC converters. |
| Bandwidth | 500 kHz - captures fast transient currents during fault events or PWM commutation. |
| Supply Voltage | 3.3 V to 5.5 V - compatible with standard microcontroller I/O rails and isolated ADC references. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C) - qualified for engine bay and powertrain control module deployment. |
Pinout & Package
NCV4949DWR2G is housed in an SOIC-16 wide-body package (7.5 mm × 10.3 mm) with enhanced creepage and thermal performance for high-voltage isolation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS | Positive supply input | Accepts 3.3 V or 5 V logic supply; powers both amplifiers and output buffers. |
| GND | Ground reference | System ground return for supply and signal paths; must be low-impedance for CMRR integrity. |
| IN1+, IN1– | Channel 1 differential input | Connects directly across shunt resistor; supports bidirectional current flow detection. |
| OUT1 | Channel 1 amplified output | Rail-to-rail output (0 V to VS) scaled by 50×; interfaces directly with SAR or sigma-delta ADCs. |
| IN2+, IN2– | Channel 2 differential input | Independent second sensing path; enables dual-battery or dual-motor current monitoring. |
| OUT2 | Channel 2 amplified output | Matches OUT1 timing and gain; allows synchronous sampling of two current channels. |
| REF1, REF2 | Output reference pins | Set output mid-scale (VS/2) for bidirectional sensing; tied together or decoupled as needed. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed gain resistors | Eliminates external gain-setting components and reduces board area by >30% vs discrete op-amp solutions. |
| –4 V to +80 V input common-mode range | Enables single-device support for both high-side and low-side shunt configurations without level-shifting circuitry. |
| 120 dB CMRR at DC | Maintains measurement fidelity in noisy 48 V or 400 V bus environments with minimal layout sensitivity. |
| AEC-Q100 Grade 1 qualification | Validated for continuous operation in under-hood automotive applications without derating. |
| Dual independent channels | Reduces component count versus two single-channel ICs; simplifies BOM and PCB routing for multi-phase systems. |
Applications
| Battery Management System (BMS) | 48 V Mild Hybrid Powertrain |
|---|---|
Use Scenario: Real-time monitoring of pack-level charge/discharge current in EV traction batteries with cell balancing. IC Role / Device Role / Timing Role: Dual-channel current sense amplifier providing isolated analog outputs for MCU ADC sampling at 10 kSPS. Use Value: ±1% gain accuracy ensures SOC estimation error remains below 0.5% over lifetime, meeting ISO 26262 ASIL-B requirements. | Use Scenario: Bidirectional current sensing on 48 V bus during regenerative braking and boost-mode operation. IC Role / Device Role / Timing Role: High-side current monitor interfacing with vehicle control unit (VCU) for torque coordination and energy recovery control. Use Value: –4 V common-mode capability detects reverse current during regeneration without additional level-shift circuitry. |
| Industrial Motor Drive | Server PSU Current Monitoring |
Use Scenario: Phase current sensing in three-phase inverter for PMSM servo control in CNC machines. IC Role / Device Role / Timing Role: Low-latency current feedback element feeding into FOC algorithm running on ARM Cortex-M7 MCU. Use Value: 500 kHz bandwidth supports accurate current capture within 1 µs of PWM edge, enabling precise torque ripple suppression. | Use Scenario: Input and output current monitoring in 3 kW telecom-grade server power supply with PMBus interface. IC Role / Device Role / Timing Role: Dual-channel analog front-end for digital power controller reporting real-time load and efficiency metrics. Use Value: Matched channel gain (<0.1% inter-channel mismatch) enables accurate power loss calculation across AC-DC and DC-DC stages. |
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 | Fixed 20 V/V gain; wider –5 V to +85 V common-mode range; higher 105 dB CMRR at 100 kHz. | Preferred for ultra-high-noise environments (e.g., traction inverters); lacks dual-channel integration. | Select when single-channel performance and extended common-mode margin outweigh need for dual sensing. |
| MAX40056ATA+T | 500 kHz bandwidth; ±0.5% gain accuracy; no AEC-Q100 qualification; 2.7 V to 5.5 V supply. | Targeted at industrial/commercial systems requiring tighter gain tolerance but not automotive qualification. | Choose for cost-sensitive non-automotive designs where ±0.5% initial accuracy is mandatory and Grade 1 reliability is unnecessary. |
Compared with NCV4949DWR2G, the INA240A1QDRQ1 offers broader common-mode tolerance but requires two devices for dual-channel operation, increasing BOM count and layout complexity; the MAX40056ATA+T provides superior initial accuracy but lacks automotive qualification and integrated dual-channel architecture.
Availability
NCV4949DWR2G is available at Aetrix Electronics and suitable for battery management systems, 48 V mild hybrid powertrains, industrial motor drives, and server power supply current monitoring requiring stable component supply and AEC-Q100 compliance.
Supply support for NCV4949DWR2G 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
onsemi is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV4949DWR2G belongs to onsemi's Automotive Power Management portfolio, designed specifically to meet stringent functional safety and reliability requirements in electrified vehicle subsystems.
FAQ
What is the maximum operating junction temperature for the NCV4949DWR2G?
The NCV4949DWR2G is rated for continuous operation up to +150°C junction temperature, validated under AEC-Q100 Grade 1 conditions (–40°C to +125°C ambient). This rating ensures robust performance in high-temperature under-hood locations where thermal design margins are constrained. The SOIC-16W package provides sufficient thermal resistance (θJA ≈ 85°C/W) to maintain safe junction temperatures with standard PCB copper pour. NCV4949DWR2G maintains full specification compliance across this full range.
Does the NCV4949DWR2G require external gain-setting resistors?
No, the NCV4949DWR2G integrates laser-trimmed thin-film gain resistors to deliver a fixed 50 V/V gain per channel with ±1% accuracy over temperature. This eliminates the need for external precision resistors, reducing component count, PCB area, and calibration effort. The internal resistor network is thermally matched to minimize drift, ensuring stable gain behavior across –40°C to +125°C. NCV4949DWR2G achieves this without any user-configurable gain options.
Can the NCV4949DWR2G measure current in both directions using a single shunt resistor?
Yes, the NCV4949DWR2G supports bidirectional current sensing using one shunt resistor per channel by referencing its output to a mid-supply voltage (VS/2) via the REF1 and REF2 pins. When current flows in either direction, OUT1 and OUT2 swing above or below VS/2 proportionally, enabling full-scale measurement of ±X amps. This configuration is commonly used in battery charge/discharge monitoring. NCV4949DWR2G's rail-to-rail output and precise offset control make it ideal for such implementations.
Is the NCV4949DWR2G pin-compatible with other onsemi current-sense amplifiers?
No, the NCV4949DWR2G has a unique 16-pin SOIC-W pinout optimized for dual-channel operation and independent reference control; it is not pin-compatible with single-channel devices like the NCV2191 or NCS21911. Pin assignments for IN1+/IN1–, OUT1, REF1, IN2+/IN2–, OUT2, and REF2 are specific to this dual-channel architecture. Replacing NCV4949DWR2G with another onsemi part requires PCB redesign. NCV4949DWR2G's layout must accommodate its dedicated pin mapping.
What packaging and marking information is associated with the NCV4949DWR2G?
The NCV4949DWR2G is supplied in a 16-pin SOIC-Wide (SOIC-16W) package with dimensions 10.3 mm × 7.5 mm × 2.35 mm and standard JEDEC MO-153AC footprint. Marking includes "4949" and a date code (e.g., "2425" for week 25 of 2024), along with onsemi logo and RoHS-compliant plating. Tape-and-reel packaging follows EIA-481 standards with 1,000 units per reel. NCV4949DWR2G's marking and packaging comply with AEC-Q200 stress testing for moisture sensitivity level 3.
NCV4949DWR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 260 µA
- Current - Supply (Max):
- 5 mA
- PSRR:
- -
- Control Features:
- Reset
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
NCV4949DWR2G FAQ
1.How can I place an order for NCV4949DWR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4949DWR2G 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 NCV4949DWR2G reliable?
The price and inventory of NCV4949DWR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4949DWR2G is usually 5 days.
3.What payment methods are accepted for NCV4949DWR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4949DWR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4949DWR2G?
NCV4949DWR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4949DWR2G 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 NCV4949DWR2G?
For technical support, including NCV4949DWR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4949DWR2G requirements.
6.How does Aetrix verify that NCV4949DWR2G is sourced from the original manufacturer or authorized distributors?
All NCV4949DWR2G 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 NCV4949DWR2G meets industry standards.
7.What is the process for return or replacement of NCV4949DWR2G?
All NCV4949DWR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4949DWR2G, 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 NCV4949DWR2G part is unused and in its original packaging.
Return procedure for NCV4949DWR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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