AS1505-T

Digital To Analog Converters Overview

The AS1505-T is an octal 8-bit programmable low-power digital-to-analog converter (DAC) from ams-OSRAM USA INC. It features eight individually controlled DAC channels sharing a common reference-voltage input, housed in a 16-pin SOIC-150 package. The device operates on a single supply of +3V to +5V with a typical supply current of 5µA. Key electrical specifications include an integral non-linearity (INL) of ±0.75 LSB maximum and differential non-linearity (DNL) of ±0.5 LSB maximum. The AS1505-T distinguishes itself by providing separate VREFL range settings for independent zero-scale voltage control.

Digital To Analog Converters Feature Summary

• Eight individually programmable 8-bit DAC channels
• Separate VREFL pin for independent zero-scale voltage setting
• Low power consumption: 5µA @ 5V, shutdown mode ≤25µW
• Standard 3-wire serial interface (CLK, CSN, SDI)
• Power-on reset to mid-scale output

Digital To Analog Converters Applications

• Video amplifier gain control
• Video equipment voltage-controlled frequencies and bandwidths
• CRT display geometric corrections and automatic adjustments

Digital To Analog Converters Procurement Notes

Verify the specific ordering suffix '-T' corresponds to the tape and reel delivery form as listed in the manufacturer's ordering information. Confirm that the component source matches the official datasheet specifications for the AS1505 model functionality, particularly the separate VREFL range setting feature which differentiates it from the AS1504 variant.

Digital To Analog Converters Selection Notes

Select the AS1505-T when independent control over the zero-scale output voltage is required via an external VREFL connection. This model is suitable for applications needing rail-to-rail or offset voltage programming across eight channels. Ensure the design accommodates the 16-pin SOIC-150 narrow package dimensions and utilizes a standard 3-wire serial interface for data loading.

Digital To Analog Converters Part Context

The AS1505-T belongs to the AS1504/AS1505 series of octal 8-bit DACs manufactured by austriamicrosystems AG (now part of ams-OSRAM). While the AS1504 variant includes a mid-scale reset pin (RSN), the AS1505 variant replaces this with a dedicated VREFL pin to allow flexible voltage range setting. Both share identical core architecture, power characteristics, and packaging.

Digital To Analog Converters Replacement Considerations

The AS1504-T serves as a functional alternative if mid-scale reset is preferred over separate VREFL control. Verify pin compatibility, noting that Pin 15 changes from RSN (AS1504) to OUT8 (AS1505). Ensure the application does not rely on the internal GND connection of VREFL found in the AS1504.

Digital To Analog Converters FAQ

How does the AS1505-T differ from the AS1504-T?

The AS1505-T features a separate VREFL pin for independent zero-scale voltage setting, whereas the AS1504-T has an internal connection to GND for VREFL and includes an RSN pin for mid-scale reset.

What is the power consumption in shutdown mode?

In shutdown mode, the power dissipation is typically ≤25µW, maintaining individual DAC latch settings while minimizing current draw.

What is the resolution and linearity performance?

The device offers 8-bit resolution with a maximum Integral Non-Linearity (INL) of ±0.75 LSB and a maximum Differential Non-Linearity (DNL) of ±0.5 LSB.