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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics TSC103IYDT

Name: TSC103IYDT
Brand: STMicroelectronics
SKU: TSC103IYDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSC103IYDT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TSC103IYDT.pdf

Description:: IC CURRENT SENSE 1 CIRCUIT 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:4,876

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Product details

Overview

TSC103IYDT 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 - enabling precision current monitoring in automotive battery management and DC motor control systems.

For engineers reviewing the TSC103IYDT datasheet, TSC103IYDT pinout, TSC103IYDT application, or TSC103IYDT equivalent, key selection criteria include its ±500 µV input offset voltage, 90–105 dB DC CMRR, 700 kHz bandwidth, TSSOP8 package compatibility, and dual-supply capability with Vcc− pin for extended −2.1 V to 65 V common-mode operation.

Technical Context

The TSC103 employs a current-sense architecture with separate high-impedance differential inputs (Vp/Vm) referenced to Vcc−, enabling true high-side sensing without ground-loop interference. Its gain is set by two digital SEL pins controlling internal resistor ratios and buffer gain stages - not programmable registers or analog trimming.

It features rail-to-rail output buffering, 1% settling response time under 10 µs (gain-dependent), and survives reversed-battery conditions (−16 V to 75 V input survival range). Input leakage remains ≤1 µA across −40 °C to 125 °C, supporting low-power always-on monitoring in automotive and industrial power rails.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.7–5.5 V single-supply; enables direct interface with 3.3 V/5 V microcontrollers without level-shifting.
Common-Mode Range	2.9–70 V (single-supply); supports direct sensing on 12 V, 24 V, and 48 V battery rails.
Gain Options	20/25/50/100 V/V via SEL1/SEL2 pins; allows full-scale output scaling to match ADC input ranges.
Input Offset Voltage	±500 µV (typ), ±1100 µV (max); ensures ≤±2.5% output error at 50 mV sense voltage.
CMRR	90–105 dB (DC); rejects noise from high dv/dt power switching nodes in motor drives.
Bandwidth	700 kHz (Av = 50 V/V, C_L = 47 pF); captures fast transient currents in PWM-driven loads.
Quiescent Current	200–360 µA; minimizes system standby power in battery-powered UPS and notebook chargers.

Pinout & Package

TSC103IYDT is housed in a RoHS-compliant, lead-free TSSOP8 (3 × 3 mm, 0.65 mm pitch) package optimized for thermal performance (R_thJA = 120 °C/W) and PCB space-constrained automotive modules.

Pin/Terminal	Circuit Role	Design Meaning
1 (SEL2)	Digital gain select input	Logic-level pin defining second bit of 2-bit gain code; referenced to GND.
2 (Vm)	High-side shunt return node	Connects to low-side of sense resistor; input common-mode voltage referenced to Vcc−.
3 (SEL1)	Digital gain select input	Logic-level pin defining first bit of 2-bit gain code; referenced to GND.
4 (Out)	Analog output	Buffered, ground-referenced voltage proportional to (Vp − Vm) × Av; drives ADC or comparator directly.
5 (Vcc+)	Positive supply	Accepts 2.7–5.5 V; powers internal amplifier and buffer stages.
6 (Gnd)	Signal reference	System ground reference for SEL pins, output stage, and logic interface.
7 (Vcc−)	Negative supply	Enables dual-supply operation; shifts common-mode range down to −2.1 V when biased at −5 V.
8 (Vp)	High-side shunt feed node	Connects to high-side of sense resistor; withstands up to 75 V transient (load dump).

Key Features

Feature	Design Value
Independent V_CM and V_CC	Allows sensing on 70 V bus while powered from 3.3 V MCU rail - eliminates isolation or level-shift requirements.
Reversed-battery survival	Withstands −16 V on Vp/Vm pins - meets ISO 16750-2 automotive load-dump and reverse-polarity test requirements.
Four-pin-selectable gains	Eliminates external gain-setting resistors and layout sensitivity; reduces BOM count and calibration drift.
Low input leakage (≤1 µA)	Maintains accuracy in high-impedance shunt networks (e.g., 1 mΩ–10 mΩ with >10 kΩ feedback paths).
Buffered rail-to-rail output	Drives 10 mA load with <1.5 mV/mA regulation error - interfaces directly with SAR ADCs without external op-amp.

Applications

Automotive Battery Monitoring

DC Motor Phase Current Sensing

Use Scenario: Real-time monitoring of 12 V/24 V starter battery charge/discharge current in start-stop systems.

IC Role / Device Role / Timing Role: High-side current sense amplifier measuring differential voltage across 500 µΩ shunt at battery terminal.

Use Value: Enables SOC estimation with ±2.5% full-scale accuracy over −40 °C to 125 °C, surviving ISO 7637-2 pulse 5a load dump transients.

Use Scenario: Closed-loop current control of H-bridge motor driver in electric power steering (EPS) module.

IC Role / Device Role / Timing Role: High-bandwidth (700 kHz) current feedback sensor placed on high-side leg of each phase.

Use Value: Supports 20 kHz PWM switching with <10 µs settling time, minimizing torque ripple and enabling precise field-oriented control (FOC).

Photovoltaic String Monitoring

Industrial Uninterruptible Power Supply

Use Scenario: Per-string current measurement in multi-string solar inverters operating up to 600 V DC bus.

IC Role / Device Role / Timing Role: Isolated high-side current monitor interfaced via optocoupler or digital isolator to MCU.

Use Value: 70 V common-mode range accommodates string voltages up to 600 V using external level-shifting bias network on Vcc− pin.

Use Scenario: Input/output current monitoring in 48 V telecom UPS with hot-swap capability and battery backup.

IC Role / Device Role / Timing Role: Dual-channel current sensing (input AC-DC converter + output DC-DC stage) for overload protection and efficiency optimization.

Use Value: Low 360 µA quiescent current extends backup runtime; ±1100 µV max offset ensures <1% error at 10 A/1 mΩ sense.

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 CMRR (120 dB); wider supply (2.7–5.5 V); same TSSOP8 package.	Requires external gain-resistor network for non-20× scaling; lacks pin-selectable flexibility.	Choose for ultra-high CMRR-critical motor control where fixed gain suffices and offset drift (±0.2 µV/°C) is prioritized.
MAX4080TASA+	Fixed 20/60/100 V/V variants; lower quiescent current (75 µA); SO8 only; no Vcc− pin for dual-supply mode.	Cannot support negative common-mode (e.g., −2.1 V) or reversed-battery survival beyond −12 V.	Choose for space-constrained, low-quiescent designs where dual-supply operation and −16 V survival are not required.

Compared with INA240A1QDRQ1 and MAX4080TASA+, TSC103IYDT uniquely combines pin-selectable gain, dual-supply configurability (via Vcc−), and −16 V to 75 V input survival - making it optimal for automotive and industrial systems requiring flexible scaling and robust fault tolerance.

Availability

TSC103IYDT is available at Aetrix Electronics and suitable for automotive battery management, DC motor control, photovoltaic string monitoring, and uninterruptible power supply designs requiring stable component supply across extended temperature and high-reliability environments.

Supply support for TSC103IYDT 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 automotive-grade, industrial, and power management ICs with focus on functional safety and environmental compliance.

The TSC103 belongs to ST's high-voltage precision analog amplifier product line, designed specifically for accurate, robust current sensing in harsh automotive and industrial power systems - emphasizing wide common-mode range, low power, and AEC-Q100 qualification readiness.

FAQ

What is the maximum continuous common-mode voltage the TSC103IYDT can measure in single-supply mode?

The TSC103IYDT supports a continuous input common-mode voltage range of 2.9 V to 70 V when operated in single-supply configuration (Vcc− tied to GND). This allows direct sensing on 12 V, 24 V, and 48 V automotive and industrial buses without external level-shifting circuitry.

How does the gain selection work on the TSC103IYDT, and what logic levels are required?

Gain is selected via two digital inputs: SEL1 and SEL2, both referenced to GND. Logic low (≤0.5 V) and logic high (≥1.2 V) states configure gains of 20, 25, 50, or 100 V/V. No pull-up/down resistors are needed - the internal input bias current is ≤400 nA, ensuring clean logic interpretation across temperature.

Can the TSC103IYDT survive reverse battery connection, and what is its absolute maximum rating?

Yes - the TSC103IYDT survives reverse battery conditions with an absolute maximum input voltage rating of −16 V on Vp and Vm pins (measured relative to Vcc−). This meets ISO 16750-2 test pulses for automotive environments and protects against accidental polarity reversal during service.

Does the TSC103IYDT require external compensation or filtering for stable operation?

No external compensation is required. The device is internally compensated for unity-gain stability and specifies 700 kHz bandwidth with 47 pF load capacitance. For noisy environments, a simple RC filter (e.g., 10 kΩ + 100 pF) on the Out pin suppresses RF pickup without affecting loop dynamics in motor control feedback paths.

TSC103IYDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm 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-SOIC

TSC103IYDT FAQ

1.How can I place an order for TSC103IYDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSC103IYDT 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 TSC103IYDT reliable?

The price and inventory of TSC103IYDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC103IYDT is usually 5 days.

3.What payment methods are accepted for TSC103IYDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC103IYDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSC103IYDT?

TSC103IYDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSC103IYDT 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 TSC103IYDT?

For technical support, including TSC103IYDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC103IYDT requirements.

6.How does Aetrix verify that TSC103IYDT is sourced from the original manufacturer or authorized distributors?

All TSC103IYDT 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 TSC103IYDT meets industry standards.

7.What is the process for return or replacement of TSC103IYDT?

All TSC103IYDT units undergo pre-shipment inspection (PSI). If there is an issue with TSC103IYDT, 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 TSC103IYDT part is unused and in its original packaging.

Return procedure for TSC103IYDT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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