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Silicon Labs TS1101-25EG6T
- Part No.:
- TS1101-25EG6T
- Manufacturer:
- Silicon Labs
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
TS1101-25EG6T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,082
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Product details
Overview
TS1101-25EG6T from Silicon Labs is a bidirectional high-side current-sense amplifier with 25 V/V gain, 100 µV (max) input offset voltage at +25 °C, 0.6% (max) gain error, and SIGN comparator output for current-direction detection. It operates from 2 V to 27 V common-mode input range and consumes only 0.68 µA supply current - ideal for precision battery monitoring in portable power management systems.
For engineers reviewing the TS1101-25EG6T datasheet, TS1101-25EG6T pinout, TS1101-25EG6T application, or TS1101-25EG6T equivalent, key selection criteria include bidirectional sensing capability, ultra-low quiescent current, guaranteed ±100 µV VOS (TS1101), SIGN logic-level output timing, and SOT23-6 packaging compatibility with Kelvin-sense PCB layouts.
Technical Context
The TS1101-25EG6T implements a fully differential input/output architecture with dual p-channel FETs (M1/M2) enabling true zero-dead-zone bidirectional current detection: M1 conducts for forward current (VRS+ > VRS–), M2 for reverse (VRS– > VRS+), with internal amplifier disabling the inactive FET to prevent interference. Its self-powered design draws current directly from RS+/RS– terminals, eliminating need for external VDD except for SIGN logic interface.
It integrates a 50 kHz (typ) 2nd-order differential low-pass filter to suppress high-frequency noise without external components, and features output current limiting (3 mA typ) and 7 V internal clamp protection. The SIGN comparator exhibits symmetric propagation delay (0.4 ms at ±10 mV VSENSE) with no hysteresis-induced dead zone at ILOAD polarity reversal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 25 V/V - sets output scaling: VOUT = 25 × (VRS+ − VRS–) for forward flow or 25 × (VRS– − VRS+) for reverse flow |
| Input Offset Voltage (VOS) | ±100 µV (max) at +25 °C - enables accurate sub-mA current measurement with typical 10 mΩ sense resistor |
| Gain Error | ±0.6% (max) - ensures <12 mV absolute error at full-scale 300 mV VSENSE input |
| Supply Current | 0.68 µA (typ) - allows decade-long operation on coin-cell batteries in always-on monitoring applications |
| Common-Mode Range | +2 V to +27 V - supports direct high-side sensing across 12 V/24 V industrial rails and Li-ion battery stacks |
| SIGN Propagation Delay | 0.4 ms (typ) at ±10 mV VSENSE - provides deterministic current-direction reporting for real-time protection logic |
| Operating Temperature | −40 °C to +105 °C - qualified for automotive cabin and industrial control environments |
Pinout & Package
TS1101-25EG6T uses a 6-pin SOT23 package (JEDEC MO-178, Variation AA) with 2.80–2.90 mm length, 2.60–3.00 mm width, and 1.00–1.30 mm height. Pin 1 is GND; Pin 2 is SIGN; Pin 3 is OUT; Pin 4 is RS–; Pin 5 is VDD (SIGN logic supply); Pin 6 is RS+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Analog ground reference | Must connect to low-impedance analog ground plane; serves as return path for internal bias currents |
| 2 (SIGN) | Digital direction indicator | Push-pull CMOS output: HIGH = VRS+ > VRS– (forward current), LOW = VRS– > VRS+ (reverse current) |
| 3 (OUT) | Current-proportional analog output | Voltage output scaled by 25× sensed differential voltage; rail-to-rail swing limited by VRS– |
| 4 (RS–) | Sense resistor load-side terminal | Connects to low-side of external shunt; forms Kelvin sense node with Pin 6 |
| 5 (VDD) | SIGN logic supply | Accepts 1.25–5.5 V logic supply independent of sensing rail; powers SIGN comparator only |
| 6 (RS+) | Sense resistor power-side terminal | Connects to high-side of external shunt; supplies operating current for amplifier core |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing with zero-dead-zone SIGN output | Eliminates ambiguity during current reversal - critical for regenerative braking and battery charge/discharge state detection |
| Self-powered architecture | Draws operating current from RS+/RS– terminals; no separate VDD required for amplifier core |
| Integrated 50 kHz differential low-pass filter | Rejects switching regulator ripple and motor drive noise without external RC components or accuracy degradation |
| Ultra-low 0.68 µA supply current | Enables multi-year operation on CR2032 batteries in wireless sensor nodes and energy-harvesting systems |
| Guaranteed ±100 µV VOS (TS1101 family) | Supports accurate measurement of ≤10 mA load current using 100 mΩ shunt with <1% total error |
Applications
| Battery Charge/Discharge Monitoring | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Real-time tracking of bidirectional current in Li-ion battery packs during charging and discharging cycles. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing analog VOUT and digital SIGN signals to MCU for state-of-charge calculation and overcurrent cutoff. Use Value: ±100 µV VOS enables <1% error at 50 mA discharge current with 50 mΩ shunt; SIGN output triggers immediate hardware shutdown on reverse-current fault. | Use Scenario: Detecting stall and regeneration events in 24 V DC brushless motor drives. IC Role / Device Role / Timing Role: Bidirectional CSA interfacing with motor controller's PWM gate driver to monitor phase current direction and magnitude. Use Value: 0.4 ms SIGN propagation delay ensures timely response to regenerative spikes; 27 V common-mode range covers full motor bus voltage swing. |
| Smart Power Bank Management | Energy Metering in IoT Gateways |
Use Scenario: Simultaneous USB-C PD input current and battery output current measurement in portable power banks. IC Role / Device Role / Timing Role: Dual-path sensing using two TS1101-25EG6T devices - one for input port, one for output port - feeding independent ADC channels. Use Value: 0.68 µA quiescent current minimizes self-discharge during standby; 25 V/V gain optimizes dynamic range for 0–3 A sensing with 10-bit ADC. | Use Scenario: Sub-metering of auxiliary loads (e.g., PoE injectors, Zigbee radios) in edge gateway devices. IC Role / Device Role / Timing Role: High-side current monitor feeding isolated sigma-delta ADC for leakage and standby current profiling. Use Value: Integrated 50 kHz filter rejects 100 kHz switching noise from DC-DC converters; ±0.6% gain error ensures <0.5% billing-grade accuracy. |
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 | Integrated 12-bit ADC and I²C interface; 10 µA supply current; ±1% gain error; no SIGN output | Requires microcontroller I²C host; suited for digital-output systems where analog VOUT not needed | Select when system already uses I²C bus and needs built-in ADC, but avoid if low-power analog monitoring or hardware-level direction flag is required |
| MAX40056ATA+T | 20 V/V fixed gain; ±50 µV VOS (typ); 1.2 µA supply current; no SIGN output; 2.7–5.5 V VDD only | Requires external VDD; lacks direction flag; optimized for single-supply 3.3 V systems | Select for ultra-low-VOS precision in 3.3 V domains where direction detection is handled in firmware, but avoid for self-powered or 24 V high-side sensing |
Compared with INA219BIDR and MAX40056ATA+T, TS1101-25EG6T uniquely combines self-powered operation, hardware SIGN flag, and guaranteed ±100 µV VOS in a 6-pin SOT23 - making it optimal for battery-constrained, high-voltage, real-time bidirectional protection circuits without MCU intervention.
Availability
TS1101-25EG6T is available at Aetrix Electronics and suitable for battery monitoring, motor drive protection, smart charger control, and energy metering applications requiring stable component supply and long-term lifecycle support.
Supply support for TS1101-25EG6T 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 Labs is a fabless semiconductor company specializing in low-power, mixed-signal ICs for IoT, timing, and sensing applications.
The TS1100/01/02/03 family was designed specifically for high-accuracy, ultra-low-power current sensing in space-constrained portable and industrial systems - emphasizing self-powered operation, wide common-mode range, and integrated noise immunity.
FAQ
What is the function of the VDD pin on the TS1101-25EG6T?
The VDD pin on the TS1101-25EG6T supplies power exclusively to the SIGN comparator circuit and accepts 1.25 V to 5.5 V logic-level voltage. It is electrically isolated from the amplifier core, which draws operating current from the RS+ and RS– pins. This separation allows the SIGN output to remain functional even when the sensing rail voltage drops below the logic supply threshold - a key requirement for robust fault signaling in variable-voltage systems. The TS1101-25EG6T itself does not require VDD to operate its current-sense amplifier.
Does the TS1101-25EG6T require external filtering components for noise immunity?
No, the TS1101-25EG6T incorporates an integrated 50 kHz (typical) 2nd-order differential low-pass filter that effectively suppresses high-frequency switching noise without external RC networks. This eliminates added offset voltage and gain errors associated with discrete filters while maintaining the specified ±100 µV input offset voltage and ±0.6% gain error. External filtering is only recommended if application-specific noise exceeds the built-in filter's rejection capability - for example, in proximity to >1 MHz RF sources. The TS1101-25EG6T's internal filter is optimized for common-mode ripple from DC-DC converters and motor drive inverters.
How does the SIGN output behave during current reversal in the TS1101-25EG6T?
The SIGN output of the TS1101-25EG6T switches cleanly between HIGH and LOW states with no dead zone at the zero-current crossing point. When VRS+ > VRS–, SIGN is logic HIGH; when VRS– > VRS+, SIGN is logic LOW. Propagation delay is symmetric (0.4 ms typ at ±10 mV VSENSE) regardless of direction, ensuring deterministic timing for hardware-based protection logic. Unlike competing amplifiers with comparator hysteresis, the TS1101-25EG6T achieves this via dual-FET architecture and matched internal gain paths - a behavior explicitly confirmed in the datasheet's Figure 2.3 and 2.4. This makes TS1101-25EG6T suitable for real-time regenerative energy capture control.
Can the TS1101-25EG6T be used in a unidirectional sensing configuration?
Yes, the TS1101-25EG6T can be used for unidirectional current sensing by connecting the SIGN pin to a fixed logic level (e.g., VDD for forward-only mode) and ignoring its output. Its amplifier core functions identically to the TS1100 series in unidirectional applications, delivering the same 25 V/V gain, ±100 µV VOS, and 0.68 µA supply current. However, the physical package remains 6-pin SOT23 (not 5-pin), and the VDD pin must still be powered. For cost-optimized unidirectional use, TS1100-25EG5 is the dedicated variant - but TS1101-25EG6T offers design flexibility to upgrade to bidirectional capability later without PCB change.
What is the maximum allowable voltage difference between RS+ and RS– on the TS1101-25EG6T?
The absolute maximum voltage difference between RS+ and RS– on the TS1101-25EG6T is 28 V, as specified in Table 3.5 (Absolute Maximum Limits). This limit applies regardless of common-mode voltage level. For reliable operation within specifications, the differential input voltage (VSENSE) should remain within the linear output range - typically ±120 mV for 25 V/V gain to ensure VOUT stays within its 0–(VRS– – 0.05 V) swing. Exceeding 28 V risks permanent damage to the input ESD structures. The TS1101-25EG6T's 2–27 V common-mode range and 28 V differential rating make it suitable for 24 V automotive and industrial bus monitoring with appropriate shunt sizing.
TS1101-25EG6T 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
TS1101-25EG6T FAQ
1.How can I place an order for TS1101-25EG6T through Aetrix?
Please submit a Request for Quotation (RFQ) for TS1101-25EG6T 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 TS1101-25EG6T reliable?
The price and inventory of TS1101-25EG6T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS1101-25EG6T is usually 5 days.
3.What payment methods are accepted for TS1101-25EG6T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS1101-25EG6T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS1101-25EG6T?
TS1101-25EG6T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS1101-25EG6T 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 TS1101-25EG6T?
For technical support, including TS1101-25EG6T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS1101-25EG6T requirements.
6.How does Aetrix verify that TS1101-25EG6T is sourced from the original manufacturer or authorized distributors?
All TS1101-25EG6T 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 TS1101-25EG6T meets industry standards.
7.What is the process for return or replacement of TS1101-25EG6T?
All TS1101-25EG6T units undergo pre-shipment inspection (PSI). If there is an issue with TS1101-25EG6T, 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 TS1101-25EG6T part is unused and in its original packaging.
Return procedure for TS1101-25EG6T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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