This document describes the features and characteristics of 8-bit and 10-bit R2R resistor ladder networks for DAC and ADC applications, including model, number of leads, resistance range, temperature coefficient, operating temperature range, accuracy, and power rating.
This note introduces R2R resistor ladder networks used for DAC and ADC applications. It lists the electrical characteristics of the 8‑bit and 10‑bit ladders, including resistance ranges, temperature coefficients, and accuracy. Ordering information and package options such as dual‑in‑line, single‑in‑line, and surface‑mount are also provided.
Several example circuits are presented, including a multiplying DAC, LCD backlight dimmer, sine‑wave and DTMF function generators, a non‑linear digital dimmer for stage lighting, and an 8‑bit ADC built with cascaded counters and an op‑amp. These illustrate how the ladder can be used in a variety of embedded and industrial applications.
| Number of Leads / Terminals | 10 Terminal / 16 Leads |
|---|---|
| Resistance Range | 1 kΩ to 100 kΩ |
| Temperature Coefficient | +100 ppm/°C |
| Operating Temperature Range | -40 °C to +125 °C |
| Ladder Accuracy (8‑bit) | +½ LSB |
| Resistor Power Rating | 25 mW |
| Package Power Rating | 400 mW |
The 8‑bit ladder provides an accuracy of plus or minus half an LSB.
They operate from –40 °C up to +125 °C.
The 10‑bit ladder is offered in dual‑in‑line, single‑in‑line, and moulded surface‑mount packages.
The 8‑bit ladder is identified as Model 628.