AS1504, AS1505

Octa l 8-Bit Programmable Low-Power DACs with

Shutdown and Mid-Scale Reset

Dat a Sh eet

www.austriamicrosystems.com

Revision 1.0

1 - 17

1 General Description

The AS1504/AS1505 are low-power (5µA @ 5V) individ-

ually programmable 8-channel, 8-bit resolution digital-to-

analog converters. All eight DACs share a common ref-

erence-voltage input making them ideal for applications

where adjustments start at a nominal voltage.

The devices feature a low-power shutdown reference

input current (5µA) that enables the devices to maintain

individual DAC latch settings during shutdown until nor-

mal operation is resumed.

The devices are controlled via a standard 3-wire serial

interface. Data is shifted into the DACs via the internal

serial-to-parallel shift register.

The AS1504/AS1505 are available in a 16-pin SOIC-150

package.

Figure 1. Block Diagram

2 Key Features

!

8 Individually-Controlled DACs

!

Replaces 8 Potentiometers

!

Standard 3-Wire Serial Interface

!

Single-Supply Operation: +3 to +5V

!

Mid-Scale Reset Pin (AS1504)

!

!

Shutdown Mode:

!

Power-On Reset

!

16-pin SOIC-150 Package

3 Applications

The devices are ideal for video amplifier gain control,

video equipment voltage-controlled frequencies and

bandwidths, CRT display geometric corrections and

automatic adjustments, or any other space-limited DAC

application with low power-consumption requirements.

Table 1. Standard Products

Model

Functionality

AS1504

Mid-Scale Reset Pin

AS1505

DAC

Select

DAC1

GND

SDI

CLK

CSN

AS1504 Only

SHDNN

OUT1

DAC8

OUT8

Address

11-Bit

Serial Latch

CK

RSN

D

AS1504/

AS1505

8

8-Bit

Latch

CK

RSN

1

8

8-Bit

Latch

CK

RSN

3

8

8

AS1505 Only

RSN