Current Source Cell

Product Specifications

Technical details and manufacturing context for Current source cell

Definition

A current source cell is a discrete electronic circuit element designed to produce a stable, controlled current output independent of load variations. Within a resistor network or current source array, it serves as the basic building block that can be combined in parallel or series configurations to achieve specific current distribution patterns, precision current sourcing, or programmable current outputs for applications such as sensor biasing, LED driving, analog signal processing, and reference current generation. The cell typically integrates active semiconductor components, such as transistors or operational amplifiers, with feedback mechanisms to maintain a constant current through a load. It compares the actual output current against a reference, often set by a precision resistor or voltage reference, and adjusts its internal circuitry to correct any deviations, ensuring stable current delivery regardless of load impedance changes or supply voltage fluctuations. Key parameters include an output current range of 0.1–100 mA (adjustable), current accuracy of ±0.5% at 25°C, supply voltage range of 3.3–36 V DC, voltage drop of 0.5–2.5 V at maximum output current, operating temperature range of -40 to 85°C (industrial grade), temperature coefficient of ±50 ppm/°C, load regulation of ±0.1% for load change 10–90%, line regulation of ±0.05%/V, output noise ≤10 µVrms (10 Hz–100 kHz), operating humidity 5–95% RH (non-condensing), and ESD rating of ±2 kV (HBM, per IEC 61000-4-2). Available package types include SOT-23 and SOIC-8, with other packages on request. The cell is constructed using semiconductor silicon, copper, epoxy resin, and gold bonding wire. This directory entry provides reference values; verify model-specific specifications and standards with the legal manufacturer or supplier before procurement.

Working Principle

The current source cell operates by using active semiconductor components, typically transistors or operational amplifiers, with feedback mechanisms to maintain a constant current through a load. The cell compares the actual output current against a reference, often set by a precision resistor or voltage reference, and adjusts its internal circuitry to correct any deviations. This ensures stable current delivery regardless of load impedance changes or supply voltage fluctuations. The feedback loop continuously monitors the output and makes real-time corrections, providing a regulated current that is independent of external variations.

Common Materials

Semiconductor silicon, Copper, Epoxy resin, Gold bonding wire

Technical Parameters

Parameter	Typical range	Notes & selection driver
Output Current Range	0.1–100 mA	Adjustable within range
Current Accuracy	±0.5 %	At 25°C, typical
Supply Voltage Range	3.3–36 V DC	Depends on output current
Voltage Drop	0.5–2.5 V	At max output current
Operating Temperature Range	-40–85 °C	Industrial grade
Temperature Coefficient	±50 ppm/°C	Typical
Load Regulation	±0.1 %	For load change 10–90%
Line Regulation	±0.05 %/V	For supply variation
Output Noise	≤10 µVrms	10 Hz–100 kHz
Package Type	SOT-23, SOIC-8	Other packages on request
Operating Humidity	5–95 % RH	Non-condensing
ESD Rating	±2 kV	HBMIEC 61000-4-2

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Reference resistor Part
Sets the precise current value through voltage-to-current conversion

Material: Thin-film nichrome or precision metal alloy
Current mirror transistors Part
Replicates and scales the reference current to the output

Material: Bipolar or CMOS semiconductor silicon
Feedback amplifier
Monitors output current and adjusts drive to maintain constant current

Material: Semiconductor silicon with metal interconnects
Output transistor Part
Delivers the regulated current to the external load

Material: Power semiconductor silicon with copper heat spreader

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Resistor Network / Current Source Array

View system integration details

Manufacturers of Current source cell

Manufacturer profiles associated with Current source cell.

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Frequently Asked Questions

What is the output current range of this current source cell?

The output current range is 0.1 to 100 mA, adjustable within that range. However, the exact adjustable range may depend on the specific model and configuration. Always verify with the manufacturer's datasheet.

What is the typical current accuracy?

The typical current accuracy is ±0.5% at 25°C. This is a reference value; actual accuracy may vary with temperature and operating conditions. Confirm with the supplier.

What is the operating temperature range?

The operating temperature range is -40 to 85°C, industrial grade. This indicates the ambient temperature range within which the component is designed to operate. Verify for your specific application.

What package types are available?

Standard package types include SOT-23 and SOIC-8, with other packages available on request. The package type affects mounting and thermal performance. Check with the manufacturer for availability.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Not applicable (solid-state component)
other spec:	Current regulation accuracy: ±0.5% to ±5% of set value
temperature:	-40°C to +125°C

Product Specifications

Applied To / Applications

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Application Fit & Sizing Matrix

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