AS1504 Octal, 8-bit, High Accuracy, Low Power, DAC with Shutdown and Mid-Scale Reset Pin0 pages

AS1504, AS1505

D a ta S he e t

O c ta l 8 - B i t P r o g r a m m a b l e L o w - P o w e r D A C s w i t h
S h u td o w n a n d M i d - S c a l e R e s e t

1 General Description

2 Key Features
!

Model
AS1504
AS1505

Standard 3-Wire Serial Interface

!

Single-Supply Operation: +3 to +5V

!

Mid-Scale Reset Pin (AS1504)

!

Separate VREFL Range Setting (AS1505)

!

Shutdown Mode: ≤25µW (IDD and IREF)

!

Power-On Reset

!

Mid-Scale Reset Pin

Replaces 8 Potentiometers

!

Functionality

8 Individually-Controlled DACs

!

The AS1504/AS1505 are low-power (5µA @ 5V) individually programmable 8-channel, 8-bit resolution digital-toanalog converters. All eight DACs share a common reference-voltage input making them ideal for applications
where adjustments start at a nominal voltage.
Table 1. Standard Products

16-pin SOIC-150 Package

Separate VREFL Range Settings

The devices feature a low-power shutdown reference
input current (5µA) that enables the devices to maintain
individual DAC latch settings during shutdown until normal 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.

3 Applications

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

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.

Figure 1. Block Diagram
VREFH

VREFL
AS1505 Only

8-Bit
Latch
CK RSN

VREFH
DAC1 VOUT
VREFL

OUT1

VREFH
DAC8 VOUT
VREFL

8

OUT8

DAC 1
Select
8
Address

VDD

3

GND

11-Bit
Serial Latch 8
D
CK
RSN

SDI
CLK

8-Bit
Latch
CK RSN

CSN

AS1504/
AS1505

8

RSN

www.austriamicrosystems.com

AS1504 Only

Revision 1.0

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