My Inquiry
My Account
STMicroelectronics TSC103ID
- Part No.:
- TSC103ID
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TSC103ID.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,339
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TSC103ID from STMicroelectronics is a high-voltage, high-side current sense amplifier designed to measure differential voltage across shunt resistors in automotive and industrial power rails. It supports pin-selectable gains of 20/25/50/100 V/V, operates with input common-mode voltage up to 70 V (single-supply), consumes ≤360 µA quiescent current, and delivers buffered ground-referenced output - enabling precision current monitoring in battery chargers and DC motor control systems.
For engineers reviewing the TSC103ID datasheet, TSC103ID pinout, TSC103ID application, or TSC103ID equivalent, key selection criteria include its ±500 µV input offset voltage, 90–105 dB DC CMR, -40 °C to +125 °C operating range, dual-supply capability down to -2.1 V common-mode, and TSSOP8/SO8 package compatibility for space-constrained PCB layouts.
Technical Context
The TSC103ID implements a precision current-sense architecture with independent input common-mode and supply voltage domains. Its internal topology separates sensing and buffering stages: a high-gain differential amplifier stage sets gain via SEL1/SEL2 logic states, followed by a unity-gain voltage buffer that isolates the output from load variations while maintaining linearity.
It supports both single-supply (Vcc− tied to GND) and dual-supply (Vcc− biased negative) configurations. In dual mode, common-mode range shifts linearly with Vcc−, enabling operation under reversed-battery (-16 V) and load-dump (75 V) transients - critical for automotive 12 V/24 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | 20 / 25 / 50 / 100 V/V - selected via two digital inputs (SEL1, SEL2), enabling full-scale output scaling without external resistor changes |
| Common-Mode Range | 2.9 V to 70 V (single-supply); -2.1 V to 65 V (dual-supply with Vcc− = −5 V) - supports direct connection to high-side bus without level-shifting |
| Input Offset Voltage | ±500 µV (typ), ±1100 µV (max) at 25 °C - ensures <±2.5% output error at 50 mV sense voltage with Av = 50 V/V |
| Supply Current | 200–360 µA (max) - enables always-on monitoring in low-power battery systems without significant drain |
| CMRR | 90–105 dB (DC) - rejects bus voltage fluctuations during load switching, preserving measurement integrity in noisy 12 V/24 V environments |
| ESD Rating | HBM: 2.5 kV - meets automotive-grade robustness requirements for in-vehicle assembly and field operation |
| Operating Temp | −40 °C to +125 °C - qualified for under-hood and industrial power-conversion applications |
Pinout & Package
Available in SO8 and TSSOP8 plastic packages - both RoHS-compliant, surface-mount, and footprint-compatible for layout flexibility. TSSOP8 offers reduced board area; SO8 provides higher thermal mass for sustained power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vp | Analog input (high-side) | Connects to shunt resistor's high-potential side; carries load current into device; withstands up to +75 V relative to Vcc− |
| Vm | Analog input (low-side) | Connects to shunt resistor's low-potential side; carries load current out; common-mode reference for differential sensing |
| Out | Analog output | Buffered, ground-referenced voltage proportional to (Vp − Vm) × Av; drives ADC or controller directly without level shift |
| Vcc+ | Positive supply | 2.7–5.5 V supply input; powers internal circuitry; independent of Vp/Vm common-mode voltage |
| Vcc− | Negative supply reference | Configures dual-supply mode; sets lower bound of common-mode range; must be ≥ −8 V when Vcc+ = 5.5 V |
| Gnd | Ground reference | System ground return for Vcc+, SEL1, SEL2, and Out; separate from Vcc− in dual-supply configuration |
| SEL1 / SEL2 | Digital gain select | Two-pin binary interface (GND/Vcc+) selects one of four fixed gains; no external pull-ups required |
Key Features
| Feature | Design Value |
|---|---|
| Independent supply & common-mode domains | Enables direct high-side sensing on 70 V bus while powered from 5 V rail - eliminates need for isolated supplies or level translators |
| Reversed-battery survivability | Withstands −16 V on Vp/Vm pins - protects against battery polarity reversal in automotive modules without external clamping |
| Low quiescent current | ≤360 µA max over temperature - allows continuous current monitoring in always-on vehicle subsystems (e.g., battery management) |
| Pin-selectable gain | Four factory-trimmed gain options (20–100 V/V) set via SEL1/SEL2 - simplifies BOM and design reuse across multiple current ranges |
| Buffered output stage | Drives capacitive loads up to 47 pF with <10 µs settling (1%) - interfaces directly with SAR ADCs without external op-amp buffering |
Applications
| Automotive Battery Monitoring | Industrial DC Motor Control |
|---|---|
|
Use Scenario: Real-time monitoring of starter battery charge/discharge current in 12 V vehicle networks, including start-stop and regenerative braking events. IC Role / Device Role / Timing Role: High-side current sense amplifier measuring shunt voltage with 70 V common-mode tolerance and reversed-battery protection. Use Value: Enables accurate state-of-charge estimation and fault detection (e.g., short-circuit, open-wire) without compromising system reliability during load-dump transients. |
Use Scenario: Closed-loop current regulation in 24 V brushed DC motor drivers for HVAC actuators and power seats. IC Role / Device Role / Timing Role: Precision analog front-end converting motor phase current into ground-referenced voltage for microcontroller ADC sampling. Use Value: Delivers <±2.5% output accuracy at 50 mV sense voltage, supporting fast torque response and stall detection within 10 µs settling time. |
| Photovoltaic String Monitoring | High-End Server PSU Current Sensing |
|
Use Scenario: Per-string current measurement in solar combiner boxes where strings operate up to 600 V DC but sense nodes float at intermediate potentials. IC Role / Device Role / Timing Role: High-common-mode amplifier referenced to string midpoint, rejecting PV array noise and leakage currents. Use Value: Maintains 95 dB AC CMRR at 1 kHz, ensuring stable readings despite EMI from nearby inverters and switching transients. |
Use Scenario: Input/output current sensing in 48 V intermediate bus architecture (IBA) server power supplies with tight efficiency targets. IC Role / Device Role / Timing Role: Low-drift, low-power current monitor feeding digital power management ICs for adaptive load-line control. Use Value: Achieves ±240 ppm/°C output voltage drift and <360 µA ICC, minimizing self-heating error and standby power loss in multi-rail PSUs. |
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 |
|---|---|---|---|
| INA240A1IDR | Fixed 20 V/V gain; 80 V common-mode range; 120 kHz bandwidth; higher quiescent current (1.8 mA) | Better suited for high-bandwidth motor control loops; less optimal for ultra-low-power always-on monitoring | Select when bandwidth >100 kHz is required and supply current is not constrained |
| MAX4080TASA+ | Pin-selectable gains (50/100 V/V only); 76 V common-mode; 2.5 µA input bias; no dual-supply support | Lacks reversed-battery tolerance and dual-supply flexibility; optimized for cost-sensitive industrial sensors | Choose for simplified gain options and lower input bias in single-supply-only designs |
Compared with INA240A1IDR and MAX4080TASA+, the TSC103ID uniquely balances ultra-low quiescent current (360 µA), dual-supply configurability, and −16 V to +75 V survival range - making it optimal for automotive and industrial systems requiring both robustness and energy efficiency.
Availability
TSC103ID is available at Aetrix Electronics and suitable for automotive battery monitoring, industrial DC motor control, photovoltaic string monitoring, and high-end server PSU current sensing requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for TSC103ID 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, specializing in automotive, industrial, and power management ICs with strong emphasis on functional safety and AEC-Q100 qualification.
The TSC103ID belongs to ST's high-voltage precision analog portfolio, engineered specifically for robust current sensing in harsh automotive and industrial environments - prioritizing wide common-mode range, reverse-polarity resilience, and low-power operation.
FAQ
What is the maximum common-mode voltage the TSC103ID can survive during transient conditions?
The TSC103ID survives −16 V to +75 V on Vp and Vm pins relative to Vcc−, covering reversed-battery and ISO 7637-2 load-dump pulses. This rating applies regardless of supply configuration and is validated per absolute maximum ratings - not operational limits - meaning it defines survival, not guaranteed functionality.
Can the TSC103ID operate with Vcc− floating or disconnected?
No. Vcc− must be either tied to GND (single-supply mode) or biased to a defined negative voltage (dual-supply mode). Floating Vcc− violates the absolute maximum rating for Vcc+ − Vcc− (≤15 V) and risks latch-up or permanent damage due to undefined internal node biasing.
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 gains due to fixed input offset voltage contribution. Higher gains (e.g., 100 V/V) improve signal-to-offset ratio, but accuracy remains limited by ±1100 µV Vos - so minimum usable Vsense is ~10 mV for <±5% error.
Is the TSC103ID compatible with both SO8 and TSSOP8 PCB footprints?
Yes - ST specifies identical pinout and electrical behavior for both SO8 and TSSOP8 packages. The TSC103ID is offered in both variants (TSC103IDT = TSSOP8; TSC103ID = SO8), allowing direct substitution based on thermal, space, or assembly requirements without schematic or layout changes.
TSC103ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TSC103ID FAQ
1.How can I place an order for TSC103ID through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC103ID 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 TSC103ID reliable?
The price and inventory of TSC103ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC103ID is usually 5 days.
3.What payment methods are accepted for TSC103ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC103ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC103ID?
TSC103ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC103ID 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 TSC103ID?
For technical support, including TSC103ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC103ID requirements.
6.How does Aetrix verify that TSC103ID is sourced from the original manufacturer or authorized distributors?
All TSC103ID 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 TSC103ID meets industry standards.
7.What is the process for return or replacement of TSC103ID?
All TSC103ID units undergo pre-shipment inspection (PSI). If there is an issue with TSC103ID, 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 TSC103ID part is unused and in its original packaging.
Return procedure for TSC103ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSC103ID Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
