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Silicon Labs TS1103-50EG6T
- Part No.:
- TS1103-50EG6T
- Manufacturer:
- Silicon Labs
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
TS1103-50EG6T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,089
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Product details
Overview
TS1103-50EG6T from Silicon Laboratories is a bidirectional high-side current-sense amplifier with 50 V/V fixed gain, 1 μA supply current, ±200 μV input offset voltage (max), 0.6% gain error (max), and 2 V to 27 V input common-mode range - designed for precision battery-current monitoring in smart chargers and portable power management systems.
For engineers reviewing the TS1103-50EG6T datasheet, TS1103-50EG6T pinout, TS1103-50EG6T application, or TS1103-50EG6T equivalent, key selection criteria include ultra-low quiescent current, guaranteed bidirectional sensing with SIGN comparator output, SOT23-6 package constraints, and compatibility with low-voltage logic supplies down to 1.25 V.
Technical Context
The TS1103-50EG6T implements a fully differential, self-powered architecture that draws operating current directly from the sensed rail (RS+ and RS−), eliminating need for separate VDD for the amplifier core. Its internal p-channel FET pair (M1/M2) enables symmetrical bidirectional operation without dead-zone at zero-crossing.
It integrates a 50 kHz 2nd-order differential low-pass filter to suppress high-frequency noise from switching regulators, and features a push-pull SIGN comparator with propagation delay as low as 0.4 ms at ±10 mV sense voltage - enabling accurate real-time direction detection of load current in battery charge/discharge cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - sets output scaling: 50 mV output per 1 mV sense voltage across RSENSE |
| Supply Current | 1.0 μA max - enables multi-year operation from coin-cell or energy-harvesting sources |
| Input Offset Voltage | ±200 μV max - limits minimum resolvable current to ~2 mA with 100 mΩ sense resistor |
| Common-Mode Range | +2 V to +27 V - supports direct sensing on Li-ion battery packs, 12 V rails, and USB PD lines |
| Gain Error | ±0.6% max - contributes ≤0.6% full-scale error independent of temperature or supply variation |
| Output Settling Time | 2.2 ms to 1% - ensures stable readings before ADC sampling in microcontroller-based power monitors |
| SIGN Propagation Delay | 0.4 ms at ±10 mV - provides timely current-direction flag for fast charge termination or protection logic |
Pinout & Package
TS1103-50EG6T is housed in a 6-pin SOT23 package (JEDEC MO-178 AB, EIAJ SC74A compliant), with 1.50–1.75 mm body width, 0.95 mm height, and 0.60–0.80 mm lead pitch - optimized for space-constrained PCB layouts in handheld devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Analog ground reference | Must connect to low-impedance analog ground plane; serves as return for SIGN output and OUT stage |
| 2 - SIGN | Digital direction indicator | Push-pull logic output: HIGH when VRS+ > VRS− (load sourcing), LOW when VRS− > VRS+ (load sinking) |
| 3 - OUT | Analog current magnitude output | Voltage output proportional to |VRS+ − VRS−| × 50; ratiometric to sense resistor value |
| 4 - RS− | Sense resistor load-side terminal | Non-inverting input node; connects to low side of external shunt; Kelvin connection recommended |
| 5 - VDD | SIGN comparator supply | Accepts 1.25–5.5 V logic supply; powers only SIGN circuit - amplifier core is self-powered |
| 6 - RS+ | Sense resistor power-side terminal | Inverting input node; connects to high side of external shunt; must withstand up to +27 V common-mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing with zero dead zone | Eliminates ambiguity at ILOAD = 0 A - critical for battery charge/discharge state detection |
| Integrated 50 kHz differential low-pass filter | Rejects switching noise from DC/DC converters without external RC components or accuracy loss |
| Self-powered amplifier core | Draws no current from VDD pin - allows use with 1.25 V logic while sensing 27 V rails |
| Guaranteed performance over −40°C to +105°C | Validated for automotive cabin, industrial battery packs, and outdoor portable equipment |
| Output current limiting (3 mA typ) and 7 V clamp | Prevents damage during overvoltage transients or incorrect shunt placement |
Applications
| Smart Charger Monitoring | USB-C Power Delivery Feedback |
|---|---|
Use Scenario: Real-time measurement of charge/discharge current in lithium-ion battery packs during fast-charging cycles with thermal foldback. IC Role / Device Role / Timing Role: High-side bidirectional current-sense amplifier providing analog magnitude (OUT) and digital direction (SIGN) outputs synchronized to charging controller timing. Use Value: Enables precise Coulomb counting and dynamic charge termination without adding series resistance in the discharge path. | Use Scenario: Monitoring source/sink current on USB-C CC and VBUS lines to enforce power role negotiation and prevent overcurrent faults. IC Role / Device Role / Timing Role: Self-powered current sensor interfacing to USB PD controller's analog monitoring inputs and GPIO for direction flagging. Use Value: Supports dual-role power (DRP) operation with <1 μA system-level overhead and no additional LDO required. |
| Portable Medical Device Battery Management | Industrial IoT Node Power Telemetry |
Use Scenario: Long-term battery current logging in wearable ECG monitors where runtime and measurement accuracy are both critical. IC Role / Device Role / Timing Role: Ultra-low-IQ current sensor feeding into SAR ADC with periodic wake-up sampling every 10 seconds. Use Value: Extends 200 mAh coin-cell life beyond 3 years while maintaining ±1% full-scale accuracy across temperature. | Use Scenario: Remote monitoring of solar-charged backup batteries in edge gateways deployed in uncontrolled ambient environments. IC Role / Device Role / Timing Role: High-accuracy, wide common-mode current sensor operating across −40°C to +105°C with integrated noise filtering. Use Value: Delivers reliable telemetry under variable lighting, temperature, and RF interference without external filtering components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA219BIDR | I²C digital output; 10-bit ADC built-in; 2.7–5.5 V supply; no SIGN output; 25 μA typical supply current | Requires microcontroller I²C interface; lacks native direction flag; better for host-controlled systems with firmware flexibility | Choose INA219BIDR when digital bus integration and onboard ADC reduce BOM count, accepting higher quiescent current. |
| MAX40056AUT+T | Single-supply operation only; unidirectional; 1.5 μA supply current; 100 V/V gain option only; no SIGN output | Not suitable for true bidirectional detection; requires external comparator for direction sensing | Choose MAX40056AUT+T only for unidirectional high-side sensing where direction is known or irrelevant. |
Compared with TS1103-50EG6T, the INA219BIDR trades ultra-low IQ and hardware SIGN output for integrated digitization and bus control, while the MAX40056AUT+T sacrifices bidirectionality and direction flagging to achieve slightly lower cost in unidirectional applications - making TS1103-50EG6T uniquely suited for autonomous, low-power, direction-aware analog current monitoring.
Availability
TS1103-50EG6T is available at Aetrix Electronics and suitable for smart charger design, USB-C power delivery feedback, and portable medical device battery management requiring stable component supply, long-lifecycle assurance, and consistent parametric performance across production batches.
Supply support for TS1103-50EG6T 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
Silicon Laboratories is a U.S.-based semiconductor company specializing in low-power, mixed-signal ICs for timing, connectivity, and sensing applications.
The TS1103-50EG6T belongs to Silicon Labs' precision analog current-sense amplifier product line, engineered specifically for energy-constrained, bidirectional power-path monitoring in battery-centric systems.
FAQ
What is the maximum common-mode voltage the TS1103-50EG6T can handle?
The TS1103-50EG6T supports a guaranteed input common-mode voltage range of +2 V to +27 V. Absolute maximum rating for RS+ and RS− pins is −0.3 V to +27 V relative to GND. This allows direct high-side sensing on 24 V industrial rails and multi-cell Li-ion battery stacks without level-shifting circuitry. The TS1103-50EG6T maintains specified gain accuracy and offset performance across this full range.
Does the TS1103-50EG6T require an external power supply for its amplifier core?
No - the TS1103-50EG6T amplifier core is self-powered from the sensed voltage across RS+ and RS−, drawing only 1 μA total supply current from those terminals. Only the SIGN comparator requires an external VDD supply (1.25–5.5 V). This architecture enables the TS1103-50EG6T to operate with no dedicated VDD connection for the analog path, simplifying design in single-rail systems.
Can the TS1103-50EG6T accurately detect zero-crossing current direction?
Yes - the TS1103-50EG6T features a symmetric SIGN comparator with no dead zone at ILOAD = 0 A. Its design ensures monotonic, continuous transfer characteristic across zero sense voltage, verified by Figure 1 in the datasheet. This enables reliable detection of charge-to-discharge transitions in battery systems without hysteresis-induced ambiguity - a key differentiator of the TS1103-50EG6T versus many competing amplifiers.
What is the purpose of the internal 50 kHz differential low-pass filter in the TS1103-50EG6T?
The internal 2nd-order differential low-pass filter suppresses high-frequency noise (e.g., switching ripple from DC/DC converters) before it reaches the amplifier core, preventing rectification artifacts and output errors. Unlike external RC filters, it introduces no additional offset or gain error - preserving the TS1103-50EG6T's ±200 μV VOS and ±0.6% gain error specifications. This eliminates need for external filtering components in noisy power management environments.
How does the TS1103-50EG6T's gain setting differ from programmable current-sense amplifiers?
The TS1103-50EG6T uses factory-trimmed internal resistors (RGAIN = 200 Ω, ROUT = 10 kΩ) to fix gain at exactly 50 V/V - no external resistors or configuration pins are needed. This eliminates layout sensitivity, resistor tolerance errors, and temperature drift associated with external gain networks. The TS1103-50EG6T achieves ±0.6% gain error over temperature without calibration, unlike programmable alternatives that require trimming or digital compensation.
TS1103-50EG6T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 6 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 680nA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2 V
- Voltage - Supply Span (Max):
- 25 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TS1103-50EG6T FAQ
1.How can I place an order for TS1103-50EG6T through Aetrix?
Please submit a Request for Quotation (RFQ) for TS1103-50EG6T 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 TS1103-50EG6T reliable?
The price and inventory of TS1103-50EG6T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS1103-50EG6T is usually 5 days.
3.What payment methods are accepted for TS1103-50EG6T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS1103-50EG6T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS1103-50EG6T?
TS1103-50EG6T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS1103-50EG6T 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 TS1103-50EG6T?
For technical support, including TS1103-50EG6T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS1103-50EG6T requirements.
6.How does Aetrix verify that TS1103-50EG6T is sourced from the original manufacturer or authorized distributors?
All TS1103-50EG6T 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 TS1103-50EG6T meets industry standards.
7.What is the process for return or replacement of TS1103-50EG6T?
All TS1103-50EG6T units undergo pre-shipment inspection (PSI). If there is an issue with TS1103-50EG6T, 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 TS1103-50EG6T part is unused and in its original packaging.
Return procedure for TS1103-50EG6T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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