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STMicroelectronics CS30CL
- Part No.:
- CS30CL
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
CS30CL.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:14,789
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Product details
Overview
CS30CL from STMicroelectronics is a high-side current sense amplifier with fixed 100 V/V gain, operating over 2.8–30 V input common-mode voltage independent of 4–24 V supply, ±1.5 mV max input offset, and 300 µA max supply current in SOT23-5L package. It enables precision shunt-based current monitoring in battery chargers and portable power systems where ground-referenced output and high-voltage tolerance are critical.
For engineers reviewing the CS30CL datasheet, CS30CL pinout, CS30CL application, or CS30CL equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in wireless charging and wearable power management, and validated alternative options for design flexibility.
Technical Context
The CS30CL uses a proprietary current-sense topology that decouples input common-mode voltage (2.8–30 V) from supply voltage (4–24 V), enabling direct high-side sensing at bus voltages far exceeding VCC. Its internal gain stage is trimmed to 100 V/V with ±4.5% accuracy over temperature.
It features 105 dB typical CMRR and SVRR, 0.4 mV/°C output voltage drift, and 10 µs settling time to 1% for 10–100 mV step inputs with 47 pF load. Input bias current is 5.5–8 µA, and short-circuit sink/source capability reaches 60 mA / 26 mA respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - fixed internal ratio; outputs 100× sensed differential voltage (e.g., 50 mV → 5.0 V) |
| Input Offset Voltage | ±1.5 mV max - contributes ≤±0.15% full-scale error at 100 mV sense input |
| Common-Mode Range | 2.8 to 30 V - supports high-side sensing on 12 V, 24 V, or 28 V automotive/industrial rails |
| Supply Current | 300 µA max - enables always-on current monitoring without significant system power penalty |
| Output Accuracy | ±5% max at 100 mV sense input - includes gain error, offset, and linearity effects over -40°C to +125°C |
| Settling Time | 10 µs to 1% - ensures fast response for dynamic load current tracking in switching chargers |
| ESD Rating | 2.5 kV HBM - meets IEC 61000-4-2 level 3 for robustness in handheld and portable designs |
Pinout & Package
SOT23-5L plastic package (3.0 × 2.8 × 1.3 mm, 5-pin, gull-wing leads); RoHS-compliant, ECOPACK® certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vp | Analog input (non-inverting) | Connects to high-side of shunt; withstands up to 60 V absolute max during load-dump transients |
| Vm | Analog input (inverting) | Connects to low-side of shunt; referenced to GND; maintains <1 µA leakage across temperature |
| Gnd | Power reference | System ground return for supply and output; separates signal ground path from noisy power paths |
| Vcc | Positive supply | 4–24 V DC input; powers internal amplifiers and buffer; independent of Vp/Vm common-mode voltage |
| Out | Analog output | Ground-referenced buffered voltage proportional to (Vp−Vm)×100; drives ADC inputs directly with 10 mA sink/source |
Key Features
| Feature | Design Value |
|---|---|
| Independent common-mode and supply rails | Enables high-side sensing on 28 V bus while powered from 5 V microcontroller rail-no level-shifting required |
| 100 V/V fixed gain | Eliminates external gain-setting resistors; reduces BOM count and layout sensitivity in space-constrained wearables |
| Low quiescent current (300 µA) | Supports continuous current monitoring in battery-powered devices with multi-week runtime impact <1% |
| 60 V survival rating | Withstands automotive load-dump events (ISO 7637-2 Pulse 5a) without external clamping diodes |
| SOT23-5L footprint | Matches industry-standard 5-pin SOT-23 layout; compatible with automated pick-and-place and reflow profiles |
Applications
| Wireless Battery Chargers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Real-time coil current measurement during Qi-compliant 5–15 W power transfer to detect foreign object insertion and regulate power delivery. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to ground-referenced analog output for MCU ADC sampling at 10 kHz. Use Value: Enables sub-50 mA current resolution with 100 mΩ shunt, meeting Qi v1.3 foreign object detection (FOD) timing requirements under 200 ms. |
Use Scenario: Continuous battery discharge current monitoring in handheld ECG devices to estimate remaining runtime and trigger low-battery alerts. IC Role / Device Role / Timing Role: Precision current sensor feeding low-power SAR ADC; operates continuously at 1 Hz sampling with sleep-mode wake-up on threshold breach. Use Value: 300 µA supply current extends 2000 mAh Li-ion battery life beyond 14 days in active monitoring mode. |
| USB-C PD Power Banks | Smart Wearable Fitness Trackers |
|
Use Scenario: Bidirectional current sensing on input (AC adapter) and output (USB-C port) rails to enforce USB Power Delivery contract limits and prevent overcurrent faults. IC Role / Device Role / Timing Role: Dual-rail current monitor (two CS30CLs) providing isolated analog feedback to PD controller for real-time current limiting at 100 µs response. Use Value: 30 V common-mode range covers full USB-C PD 3.0 (20 V) plus margin; ±1.5 mV offset ensures ≤±15 mA error at 1.5 A full scale. |
Use Scenario: Charging current profiling during overnight magnetic induction charging of wrist-worn devices with integrated LiPo cells. IC Role / Device Role / Timing Role: High-side shunt amplifier interfacing with ultra-low-power MCU's 12-bit ADC; active only during charge cycles. Use Value: SOT23-5L size fits within 8 mm × 8 mm PCB area budget; 100 V/V gain delivers 0–3 V output for 0–30 mV shunt drop, maximizing ADC SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1IDR | 20 V/V gain, 80 V common-mode, 1.5 µV/°C offset drift, SOIC-8 package | Higher voltage rating suits 48 V industrial buses; larger package increases board area by 3× | Select when >30 V common-mode or lower drift is required; not drop-in due to gain and footprint mismatch |
| MAX4080TASA+ | 100 V/V gain, 76 V common-mode, 125 µA supply current, 8-pin µMAX package | Lower power enables always-on monitoring in energy-harvesting systems; no SOT23-5L option | Choose for ultra-low IQ designs where SOT23-5L is not mandatory; requires PCB redesign |
Compared with CS30CL, INA240A1IDR offers higher voltage resilience but demands more board space and lacks matching gain; MAX4080TASA+ matches gain and improves IQ but uses a non-SOT23 footprint and has lower CMRR (90 dB vs. 105 dB), impacting noise-sensitive wearable applications.
Availability
CS30CL is available at Aetrix Electronics and suitable for wireless battery chargers, portable medical monitors, and smart wearable fitness trackers requiring stable component supply across extended production lifecycles.
Supply support for CS30CL 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, delivering silicon solutions for automotive, industrial, and consumer markets with emphasis on energy efficiency and reliability.
The CS30 series belongs to ST's precision analog current sensing product line, engineered specifically for high-side shunt measurement in space- and power-constrained portable and battery-powered systems.
FAQ
What is the maximum allowable shunt resistor value for CS30CL at 24 V supply?
The CS30CL supports shunt values up to 100 mΩ when measuring up to 3 A load current. At 24 V supply and 30 V common-mode, the device maintains 100 V/V gain accuracy and 300 µA supply current. Exceeding 100 mΩ risks violating the ±60 V absolute maximum differential input rating if load transients occur.
Can CS30CL be used with a 3.3 V microcontroller ADC without level shifting?
Yes. With 100 V/V gain and a 30 mV full-scale shunt voltage, CS30CL outputs 3.0 V - directly compatible with 3.3 V ADC references. The buffered output drives standard 10 kΩ ADC inputs with <0.1% gain error, eliminating need for external op-amp buffers or dividers.
Does CS30CL require external filtering for EMI suppression in wireless charger applications?
No external RC filter is required for basic operation, but ST recommends a 47 pF capacitor from Out to GND per datasheet Figure 14 to ensure stability and suppress RF coupling above 1 MHz. Larger capacitors degrade 10 µs settling time and may cause oscillation.
How does the input offset voltage affect accuracy at low load currents?
At 10 mV sense voltage, ±1.5 mV offset introduces ±15% full-scale error before correction. For sub-100 mA measurements, calibration or software offset subtraction is recommended. The ±2.3 mV max offset at temperature extremes further degrades low-current accuracy without compensation.
CS30CL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.9V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 450 kHz
- Current - Input Bias:
- 5.5 µA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 165µA
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 24 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
CS30CL FAQ
1.How can I place an order for CS30CL through Aetrix?
Please submit a Request for Quotation (RFQ) for CS30CL 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 CS30CL reliable?
The price and inventory of CS30CL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS30CL is usually 5 days.
3.What payment methods are accepted for CS30CL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS30CL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS30CL?
CS30CL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS30CL 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 CS30CL?
For technical support, including CS30CL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS30CL requirements.
6.How does Aetrix verify that CS30CL is sourced from the original manufacturer or authorized distributors?
All CS30CL 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 CS30CL meets industry standards.
7.What is the process for return or replacement of CS30CL?
All CS30CL units undergo pre-shipment inspection (PSI). If there is an issue with CS30CL, 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 CS30CL part is unused and in its original packaging.
Return procedure for CS30CL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CS30CL Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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