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STMicroelectronics TSC103IYPT
- Part No.:
- TSC103IYPT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TSC103IYPT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,688
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Product details
Overview
TSC103IYPT from STMicroelectronics is a high-voltage, high-side current sense amplifier with independent supply and input common-mode voltage domains. It delivers pin-selectable gains of 20/25/50/100 V/V, operates from 2.7–5.5 V supply, supports 2.9–70 V common-mode range (single-supply), and consumes ≤360 µA quiescent current. It enables precision shunt-based current monitoring in automotive battery management and industrial power supplies.
For engineers reviewing the TSC103IYPT datasheet, TSC103IYPT pinout, TSC103IYPT application, or TSC103IYPT equivalent, key selection criteria include its wide common-mode survival range (−16 V to 75 V), buffered rail-to-rail output, ±500 µV input offset voltage (typ.), and TSSOP8 package compatibility with space-constrained PCB layouts.
Technical Context
The TSC103 implements a current-sense architecture where differential input voltage (Vp−Vm) is amplified via an internal transconductance stage and buffered to a ground-referenced output. Its dual-supply mode allows Vcc− to shift the common-mode operating window down to −2.1 V, enabling robust operation under reversed-battery and load-dump conditions.
Gain selection is implemented using two digital inputs (SEL1/SEL2) that configure internal resistor ratios and buffer gain stages-no external components required for gain setting. Input bias current remains below 15 nA across temperature, minimizing error in high-impedance sensing paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7–5.5 V single-supply; enables direct interface with 3.3 V or 5 V microcontrollers without level-shifting. |
| Common-Mode Range | 2.9–70 V (single-supply); supports monitoring of 12 V, 24 V, and 48 V bus systems with headroom for transients. |
| Input Offset Voltage | ±500 µV (typ.); ensures <±1 mV output error at 20 V/V gain for 5 mV sense voltage-critical for low-current detection. |
| CMRR | 90–105 dB; rejects bus noise and ripple on high-side shunts, preserving accuracy in noisy automotive environments. |
| Quiescent Current | ≤360 µA; reduces system power budget in always-on battery monitoring circuits. |
| Gain Options | 20/25/50/100 V/V (pin-selectable); eliminates need for external gain-setting resistors and associated layout sensitivity. |
| Output Drive | ±10 mA sourcing/sinking; directly interfaces with ADC inputs or comparator thresholds without external buffering. |
Pinout & Package
The TSC103IYPT is housed in a compact, lead-free, RoHS-compliant TSSOP8 package (3.0 × 4.4 mm, 0.65 mm pitch), optimized for thermal performance (RthJA = 120 °C/W) and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SEL2) | Digital gain select input | Configures second bit of 2-bit gain code; logic high/low sets 25 V/V, 50 V/V, or 100 V/V when combined with SEL1. |
| 2 (Vm) | Sense resistor return node | Connects to low-side of shunt; input leakage <1 µA minimizes measurement error in high-value Rsense designs. |
| 3 (SEL1) | Digital gain select input | Configures first bit of 2-bit gain code; determines full-scale output range together with SEL2. |
| 4 (Out) | Analog output | Buffered, ground-referenced voltage proportional to (Vp−Vm)×Av; drives 10 kΩ loads with <0.3 mV/mA load regulation. |
| 5 (Vcc+) | Positive supply rail | Accepts 2.7–5.5 V; independent of common-mode voltage-enables operation with floating high-side supplies. |
| 6 (Gnd) | Signal reference | Ground return for SEL pins and output buffer; must be tied to system ground-not shunt ground-to maintain isolation integrity. |
| 7 (Vcc−) | Negative supply rail | Enables dual-supply operation; when set to −5 V, extends common-mode range to −2.1 V to 65 V for reverse-polarity tolerance. |
| 8 (Vp) | Sense resistor high-side node | Connects to high-side of shunt; withstands up to +75 V transient (referred to Vcc−), supporting ISO 7637-2 pulse 5a compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Reversed-battery survivability | Withstands −16 V on Vp/Vm (referred to Vcc−), eliminating need for external protection diodes in automotive 12 V systems. |
| Load-dump immunity | Survives +75 V transients on Vp/Vm-meets ISO 16750-2 requirements for 24 V commercial vehicle applications. |
| Zero-drift-compatible architecture | Input offset drift ≤±20 µV/°C (max) ensures stable calibration over −40°C to +125°C ambient range. |
| Integrated gain selection | Eliminates external resistor networks and layout-dependent parasitics-improves production yield and long-term stability. |
| Low-noise output stage | 40 nV/√Hz input-referred noise at 1 kHz enables accurate resolution of sub-10 mA currents with 100 mΩ shunts. |
Applications
| Automotive Battery Monitoring | Industrial DC Motor Control |
|---|---|
Use Scenario: Real-time monitoring of starter battery charge/discharge current in start-stop systems. IC Role / Device Role / Timing Role: High-side current sense amplifier converting shunt voltage to ground-referenced analog output for MCU ADC sampling. Use Value: Enables precise state-of-charge estimation with ±1% full-scale accuracy across −40°C to +125°C, meeting ASIL-B functional safety prerequisites. | Use Scenario: Closed-loop current feedback in 24 V brushed DC motor drives for HVAC actuators. IC Role / Device Role / Timing Role: High-side current sensor providing fast-response analog feedback to PWM controller during stall and surge events. Use Value: With 1 µs gain-switching time and 700 kHz bandwidth, supports real-time current limiting at 20 kHz PWM frequencies without phase lag. |
| Photovoltaic String Monitoring | High-End Server Power Supply |
Use Scenario: Per-string current measurement in multi-string solar inverters to detect partial shading or module failure. IC Role / Device Role / Timing Role: Isolated high-side current monitor interfacing with isolated SPI ADC via optocoupler-coupled signal path. Use Value: 70 V common-mode range accommodates 60 V string voltages; 360 µA supply current minimizes self-heating in sealed junction boxes. | Use Scenario: Output current sensing in 48 V intermediate bus converters feeding VRMs in AI accelerators. IC Role / Device Role / Timing Role: Precision high-side current amplifier feeding 16-bit delta-sigma ADC for digital power management unit (PMBus). Use Value: ±500 µV offset and 90 dB CMRR ensure <0.5% current reporting error despite 48 V rail noise and adjacent high-frequency switching. |
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 |
|---|---|---|---|
| INA240A1QDRQ1 | Fixed 20 V/V gain; higher 120 V/V option available in A2 variant; 2.7–5.5 V supply; 80 V common-mode max. | Requires external gain-resistor network for non-standard gains; lacks dual-supply mode for negative common-mode extension. | Select for automotive AEC-Q100 Grade 1 applications requiring higher common-mode rejection (120 dB) but accepting fixed-gain trade-off. |
| MAX4080FASA+ | Fixed 5 V/V, 20 V/V, or 100 V/V options; 76 V common-mode; 2.7–76 V supply; no dual-supply configuration. | No Vcc− pin-cannot shift common-mode window downward; higher 76 V supply rating enables direct connection to 48 V rails. | Select when supply voltage may exceed 5.5 V and dual-supply operation is unnecessary; offers better ESD rating (4 kV HBM). |
Compared with INA240A1QDRQ1 and MAX4080FASA+, the TSC103IYPT uniquely combines pin-selectable gain, dual-supply configurability for negative common-mode support, and TSSOP8 footprint-making it optimal for space-constrained, multi-voltage automotive and industrial systems requiring flexible full-scale range tuning without redesign.
Availability
TSC103IYPT is available at Aetrix Electronics and suitable for automotive battery management, industrial motor control, photovoltaic monitoring, and high-end server power supply applications requiring stable component supply across extended temperature and voltage ranges.
Supply support for TSC103IYPT 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, Switzerland, delivering silicon solutions for automotive, industrial, and power management markets since 1987.
The TSC103 belongs to ST's high-voltage analog sensing portfolio, designed specifically for robust, high-accuracy current measurement in harsh environments-including automotive start-stop systems, industrial motor drives, and renewable energy inverters.
FAQ
What is the maximum allowable voltage on the Vp and Vm pins relative to Vcc−?
The absolute maximum voltage on Vp and Vm is −16 V to +75 V referenced to Vcc−, as specified in Table 2 of the datasheet. This rating enables reliable operation during load-dump events (up to +75 V) and reversed-battery conditions (down to −16 V), critical for automotive 12 V and 24 V systems compliant with ISO 16750-2.
Can the TSC103IYPT operate with Vcc− disconnected and left floating?
No-Vcc− must be either tied to GND (for single-supply mode) or connected to a defined negative voltage (e.g., −5 V) for dual-supply operation. Leaving Vcc− floating violates absolute maximum ratings and risks latch-up or permanent damage due to undefined internal node biasing, as confirmed in Section 6 ("Maximum permissible voltages on pins") of the datasheet.
How does gain selection affect output voltage accuracy at low sense voltages?
At Vsense = 5 mV, total output voltage accuracy degrades to ±10% (max) for all gain settings due to fixed input offset voltage contribution dominating the signal. For example, with ±500 µV Vos and 20 V/V gain, the offset contributes ±10 mV error-equal to the full-scale signal. Accuracy improves to ±2.5% at Vsense = 50 mV, per Table 6.
Is the TSC103IYPT pin-compatible with earlier revisions like TSC103IDT?
Yes-the TSC103IYPT (TSSOP8) and TSC103IDT (SO8) share identical pinout, electrical specifications, and functional behavior. Both comply with the same datasheet (DocID16873 Rev 3) and differ only in package type; PCB layout must accommodate TSSOP8's smaller footprint and finer pitch (0.65 mm vs. 1.27 mm).
TSC103IYPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 700 kHz
- Current - Input Bias:
- 10 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 200µA
- Current - Output / Channel:
- 26 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
TSC103IYPT FAQ
1.How can I place an order for TSC103IYPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC103IYPT 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 TSC103IYPT reliable?
The price and inventory of TSC103IYPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC103IYPT is usually 5 days.
3.What payment methods are accepted for TSC103IYPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC103IYPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC103IYPT?
TSC103IYPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC103IYPT 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 TSC103IYPT?
For technical support, including TSC103IYPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC103IYPT requirements.
6.How does Aetrix verify that TSC103IYPT is sourced from the original manufacturer or authorized distributors?
All TSC103IYPT 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 TSC103IYPT meets industry standards.
7.What is the process for return or replacement of TSC103IYPT?
All TSC103IYPT units undergo pre-shipment inspection (PSI). If there is an issue with TSC103IYPT, 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 TSC103IYPT part is unused and in its original packaging.
Return procedure for TSC103IYPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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