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Silicon Labs TS1101-50EG6T
- Part No.:
- TS1101-50EG6T
- Manufacturer:
- Silicon Labs
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
TS1101-50EG6T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,634
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Product details
Overview
TS1101-50EG6T from Silicon Labs is a bidirectional high-side current-sense amplifier with 50 V/V gain, 100 µV (max) input offset voltage, 0.6% (max) gain error, and 2–27 V input common-mode range. It delivers precision load-current measurement in battery-powered power management systems where direction detection and ultra-low supply current (0.68 µA) are critical.
For engineers reviewing the TS1101-50EG6T datasheet, TS1101-50EG6T pinout, TS1101-50EG6T application, or TS1101-50EG6T equivalent, key selection criteria include bidirectional SIGN output behavior, self-powered operation without external VDD (except for SIGN logic), 50 kHz internal differential low-pass filtering, and SOT23-6 package compatibility with Kelvin-sense PCB layouts.
Technical Context
The TS1101-50EG6T implements a fully differential input/output architecture with dual p-channel FETs (M1/M2) enabling true zero-crossing current-direction detection-no dead zone at ILOAD switchover. Its SIGN comparator provides rail-to-rail push-pull logic output referenced to external VDD applied at Pin 5.
Internally powered from the RS+ and RS– terminals, it draws only 0.68 µA total supply current while maintaining 120 dB CMRR across 2–27 V common-mode range. The 50 V/V gain is realized via matched ROUT (40 kΩ typ) and RGAIN (800 Ω typ) resistor ratio, with gain accuracy guaranteed by on-die trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed ratio; enables 60 mV full-scale VSENSE at 3.6 V RS+ for optimal dynamic range and noise immunity |
| Input Offset Voltage | ±100 µV (max) - ensures ≤0.2% error contribution at 50 mV VSENSE, critical for low-current battery monitoring |
| Gain Error | ±0.6% (max) - guarantees absolute current measurement accuracy without system-level calibration |
| Supply Current | 0.68 µA (typ) - enables multi-year operation in coin-cell–powered smart chargers and remote sensors |
| Common-Mode Range | 2 V to 27 V - supports direct sensing in 3.3 V, 5 V, 12 V, and 24 V industrial and automotive subsystems |
| SIGN Propagation Delay | 0.4 ms (typ) at ±10 mV VSENSE - ensures fast, symmetric direction detection for motor control and bidirectional DC-DC converters |
| Internal Filter | 50 kHz 2nd-order differential low-pass - suppresses switching ripple without external RC components |
Pinout & Package
TS1101-50EG6T uses a 6-pin SOT23 package (JEDEC MO-178, Variation AA) with 0.95 mm pitch, 2.85 mm × 2.85 mm body, and 1.15 mm height. Pin 1 is marked with laser-etched "TADP" top-side marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Analog ground reference; must connect directly to low-impedance analog ground plane near RSENSE |
| 2 | SIGN | Push-pull digital output indicating current direction: HIGH when VRS+ > VRS−, LOW when VRS− > VRS+ |
| 3 | OUT | Analog output voltage = 50 × (VRS+ − VRS−) or 50 × (VRS− − VRS+); drives ADC inputs or comparator thresholds |
| 4 | RS− | Load-side connection to external sense resistor; Kelvin-sense trace required for <1% error at high currents |
| 5 | VDD | External logic supply (1.25–5.5 V) for SIGN comparator; decoupling capacitor mandatory for noise immunity |
| 6 | RS+ | Power-side connection to external sense resistor; also supplies internal amplifier bias current |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional SIGN output | No dead zone at zero current; symmetric propagation delay ensures reliable reversal detection in motor H-bridges |
| Self-powered architecture | Draws operating current from RS+/RS− terminals-eliminates need for separate VDD rail in high-side sensing |
| Integrated 50 kHz filter | 2nd-order differential low-pass eliminates need for external RC filters, reducing BOM count and layout area |
| Ultra-low quiescent current | 0.68 µA enables >10-year battery life in always-on current monitors for IoT edge nodes |
| High CMRR (120 dB min) | Maintains accuracy despite 27 V common-mode transients from switching regulators or motor back-EMF |
Applications
| Battery Management System | Smart Charger |
|---|---|
|
Use Scenario: Real-time monitoring of charge/discharge current in Li-ion packs with protection IC interface. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier providing analog VOUT and digital SIGN to MCU for state-of-charge and fault detection. Use Value: ±100 µV VOS enables sub-10 mA current resolution at 50 mΩ RSENSE, supporting precise coulomb counting. |
Use Scenario: Adaptive charging control in USB-C PD adapters with programmable current limits. IC Role / Device Role / Timing Role: High-side CSA feeding current feedback to buck controller and host MCU for CC/CV transition. Use Value: 0.68 µA supply current minimizes standby loss; 50 kHz filter rejects 100 kHz–1 MHz switching noise from synchronous rectifiers. |
| Industrial Motor Control | Remote Power Monitoring |
|
Use Scenario: Phase-current sensing in BLDC inverter half-bridges with direction-aware overcurrent shutdown. IC Role / Device Role / Timing Role: Bidirectional CSA delivering real-time magnitude (VOUT) and polarity (SIGN) to gate driver logic. Use Value: Symmetric SIGN propagation delay (<0.4 ms at ±10 mV) ensures timely fault response during rapid current reversals. |
Use Scenario: Low-power current telemetry in solar microinverters or smart meters with wireless backhaul. IC Role / Device Role / Timing Role: Self-powered CSA interfacing to ultra-low-power SAR ADC and LoRaWAN transceiver. Use Value: 2–27 V common-mode range accommodates wide PV string voltages; 0.6% gain error avoids field recalibration. |
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 | 26 V max common-mode; requires external VDD; I2C digital output; no SIGN pin | Best for digital-output systems needing integrated ADC and bus communication | Choose INA219BIDR when system-level digital integration outweighs analog simplicity and ultra-low IQ |
| MAX40056ATA+T | 100 V common-mode; 1.5 µA IQ; 100 µV VOS; no SIGN output; 8-pin TDFN | Preferred for high-voltage industrial drives where 27 V CM limit is insufficient | Choose MAX40056ATA+T when sensing above 27 V or requiring higher voltage margin in harsh environments |
Compared with INA219BIDR and MAX40056ATA+T, TS1101-50EG6T uniquely combines self-powered operation, dedicated SIGN logic output, and 0.68 µA IQ in a 6-pin SOT23-making it optimal for cost-sensitive, space-constrained, and battery-critical bidirectional sensing where analog output suffices.
Availability
TS1101-50EG6T is available at Aetrix Electronics and suitable for power management systems, smart chargers, battery monitoring, and industrial control requiring stable component supply and long-term production continuity.
Supply support for TS1101-50EG6T 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 Labs is a fabless semiconductor company focused on energy-efficient, intelligent, and connected devices for IoT, industrial, and consumer markets.
The TS1100/01/02/03 family was designed specifically for high-accuracy, low-power, high-side current sensing in portable and battery-operated systems-emphasizing self-powering, minimal external components, and robust noise immunity.
FAQ
What is the function of the SIGN pin on TS1101-50EG6T?
The SIGN pin on TS1101-50EG6T is a push-pull digital output that indicates current direction: logic HIGH when VRS+ > VRS− (forward current), and logic LOW when VRS− > VRS+ (reverse current). It operates independently of the analog OUT pin and requires an external VDD supply connected to Pin 5. This feature enables immediate direction detection without post-processing in TS1101-50EG6T-based motor control or bidirectional power converter designs.
Does TS1101-50EG6T require an external power supply for its current-sense amplifier core?
No, TS1101-50EG6T does not require an external power supply for its current-sense amplifier core-it is self-powered from the RS+ and RS− terminals. However, the SIGN comparator requires an external logic supply (1.25–5.5 V) connected to Pin 5 (VDD). This dual-power architecture allows the analog sensing path to operate down to 2 V common-mode while keeping digital signaling compatible with standard logic levels in TS1101-50EG6T implementations.
What is the maximum common-mode voltage supported by TS1101-50EG6T?
TS1101-50EG6T supports a guaranteed input common-mode voltage range of +2 V to +27 V. This specification applies to both RS+ and RS− pins simultaneously and is validated across the full –40 °C to +105 °C operating temperature range. The device remains functional up to 27 V, making TS1101-50EG6T suitable for 12 V and 24 V industrial and automotive subsystems without level-shifting circuitry.
How does the internal 50 kHz low-pass filter in TS1101-50EG6T improve system performance?
The TS1101-50EG6T integrates a 50 kHz 2nd-order differential low-pass filter to suppress high-frequency noise-such as switching ripple from DC-DC converters or motor drive PWM-without requiring external RC components. This reduces PCB area, eliminates filter-induced offset/gain errors, and maintains signal integrity in noisy environments. The filter is inherent to TS1101-50EG6T's monolithic design and cannot be disabled or bypassed.
Can TS1101-50EG6T be used with a 3.3 V logic supply for the SIGN pin?
Yes, TS1101-50EG6T supports 3.3 V logic supply on the SIGN pin (Pin 5/VDD). The SIGN comparator is specified for operation from 1.25 V to 5.5 V, with output low voltage ≤0.2 V and output high voltage ≥VDD – 0.2 V at 35 µA sink/source. Using 3.3 V ensures clean interfacing with standard 3.3 V MCUs and logic families while maintaining noise margin in TS1101-50EG6T-based designs.
TS1101-50EG6T 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
TS1101-50EG6T FAQ
1.How can I place an order for TS1101-50EG6T through Aetrix?
Please submit a Request for Quotation (RFQ) for TS1101-50EG6T 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 TS1101-50EG6T reliable?
The price and inventory of TS1101-50EG6T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS1101-50EG6T is usually 5 days.
3.What payment methods are accepted for TS1101-50EG6T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS1101-50EG6T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS1101-50EG6T?
TS1101-50EG6T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS1101-50EG6T 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 TS1101-50EG6T?
For technical support, including TS1101-50EG6T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS1101-50EG6T requirements.
6.How does Aetrix verify that TS1101-50EG6T is sourced from the original manufacturer or authorized distributors?
All TS1101-50EG6T 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 TS1101-50EG6T meets industry standards.
7.What is the process for return or replacement of TS1101-50EG6T?
All TS1101-50EG6T units undergo pre-shipment inspection (PSI). If there is an issue with TS1101-50EG6T, 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 TS1101-50EG6T part is unused and in its original packaging.
Return procedure for TS1101-50EG6T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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