Resistor Network / Current Source Array for DACs

Q: What is the typical resolution range for this component?

The resolution typically ranges from 8 to 16 bits, as listed in the reference parameters. Higher resolution requires more precise resistor matching. Confirm the exact resolution for your specific model with the manufacturer.

Q: How does the resistor network affect DAC linearity?

The resistor network's matching and tolerance directly influence integral nonlinearity (INL) and differential nonlinearity (DNL). Lower INL and DNL values indicate better linearity. For example, INL is typically ±0.5 to ±2 LSB, and DNL is ±0.5 to ±1 LSB. Verify these parameters for your application.

Q: What is the operating temperature range?

The reference operating temperature range is -40 to 85 °C. Extended ranges may be available for industrial applications. Always check the datasheet for the specific model to ensure it meets your environmental requirements.

Q: What standards apply to this component?

The only standard listed is IEC 60068-2-78 for humidity testing (non-condensing, 5–95% RH). This standard is a reference for verification, not a certification. Confirm compliance with the manufacturer for your specific part.

Product Specifications

Technical details and manufacturing context for Resistor Network / Current Source Array

Definition

In a Digital-to-Analog Converter (DAC), the Resistor Network or Current Source Array is the core analog circuitry responsible for converting discrete digital codes into a continuous analog output signal. It consists of a precisely matched set of resistors or current sources, each weighted according to the binary significance of its corresponding digital bit (e.g., MSB, LSB). The network sums the contributions from active bits to produce the final analog voltage or current. This component is typically fabricated on a silicon substrate using thin-film resistor materials such as NiCr or TaN, with metal interconnects made of aluminum or copper. Key parameters include resolution (8–16 bits), integral nonlinearity (±0.5–±2 LSB), differential nonlinearity (±0.5–±1 LSB), resistance tolerance (±0.01–±1%), temperature coefficient of resistance (±1–±50 ppm/°C), operating temperature range (-40–85 °C), supply voltage (2.7–5.5 V), output current range (0–20 mA), settling time (0.5–10 µs), package type (SOP-8–SOP-16), footprint area (30–60 mm²), and humidity range (5–95% RH, non-condensing, per IEC 60068-2-78). These values are typical reference ranges and must be verified for the specific model and application. The component is used in various DAC architectures, including resistor-ladder (R-2R) and current-steering designs. Its performance directly impacts the accuracy and linearity of the DAC output. For procurement, it is essential to confirm the exact specifications with the legal manufacturer or supplier, as actual values may vary. The directory listing is for reference only and does not imply certification or compliance.

Working Principle

The component operates by interpreting a digital input word. For a resistor-ladder network (e.g., R-2R), binary-weighted resistors create a voltage divider. For a current-steering DAC, an array of matched current sources is switched on or off by the digital bits. The outputs of the active elements are summed at a common node, generating an analog output proportional to the digital input value. The precision of the resistor matching or current source matching determines the linearity and accuracy of the conversion. The digital bits control switches that connect the appropriate elements to the output node, and the resulting current or voltage is the analog representation of the digital code.

Common Materials

Silicon (for integrated circuits), Thin-film resistor material (e.g., NiCr, TaN), Metal interconnects (e.g., Aluminum, Copper)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Resolution	8–16 bit	Higher resolution requires more precise resistor matching
Integral Nonlinearity (INL)	±0.5–±2 LSB	Lower INL ensures better accuracy
Differential Nonlinearity (DNL)	±0.5–±1 LSB	Monotonicity guaranteed if DNL < 1 LSB
Resistance Tolerance	±0.01–±1 %	Tighter tolerance improves linearity
Temperature Coefficient of Resistance (TCR)	±1–±50 ppm/°C	Low TCR minimizes drift over temperature
Operating Temperature Range	-40–85 °C	Extended ranges available for industrial
Supply Voltage	2.7–5.5 V	Typical for CMOS DACs
Output Current Range	0–20 mA	Depends on reference and resistor values
Settling Time	0.5–10 µs	Time to reach final output within 0.5 LSB
Package Type	SOP-8–SOP-16	Small outline packages for space-constrained designs
Footprint Area	30–60 mm²	Affects PCB layout density
Humidity Range	5–95 % RH	Non-condensingIEC 60068-2-78

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

Binary-weighted resistor Part
Provides a precise resistance value corresponding to the significance of a digital bit (e.g., R, 2R, 4R).

Material: Thin-film metal alloy
Current source cell
Generates a precise, stable reference current that is switched to the output based on the digital input bit.

Material: Silicon (MOSFET/BJT transistors)
Switching element
Directs the current or voltage from a resistor/current source to either the output summing node or ground based on the digital bit state.

Material: Silicon (CMOS transistors)

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Resistor Network / Current Source Array.

Applied To / Applications

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

Digital-to-Analog Converter (DAC)

View system integration details

Manufacturers of Resistor Network / Current Source Array

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Frequently Asked Questions

What is the typical resolution range for this component?

The resolution typically ranges from 8 to 16 bits, as listed in the reference parameters. Higher resolution requires more precise resistor matching. Confirm the exact resolution for your specific model with the manufacturer.

How does the resistor network affect DAC linearity?

The resistor network's matching and tolerance directly influence integral nonlinearity (INL) and differential nonlinearity (DNL). Lower INL and DNL values indicate better linearity. For example, INL is typically ±0.5 to ±2 LSB, and DNL is ±0.5 to ±1 LSB. Verify these parameters for your application.

What is the operating temperature range?

The reference operating temperature range is -40 to 85 °C. Extended ranges may be available for industrial applications. Always check the datasheet for the specific model to ensure it meets your environmental requirements.

What standards apply to this component?

The only standard listed is IEC 60068-2-78 for humidity testing (non-condensing, 5–95% RH). This standard is a reference for verification, not a certification. Confirm compliance with the manufacturer for your specific part.

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:	Power dissipation: 0.5W max, Supply voltage: 2.7V to 5.5V, Resolution: 8-16 bits typical
temperature:	-40°C to +125°C (operational range, typical for precision ICs)

Resistor Network / Current Source Array

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards