AS1504 Datasheet, PDF (1/17 Pages) ams AG – Octal 8-Bit Programmable Low-Power DACs with Shutdown and Mid-Scale Reset

austriamicrosystems
AS1504, AS1505
Octal 8-Bit Programmable Low-Power DACs with
Shutdown and Mid-Scale Reset
Data Sheet
1 General Description
2 Key Features
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.
Table 1. Standard Products
Model
Functionality
AS1504
Mid-Scale Reset Pin
AS1505
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 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
! 8 Individually-Controlled DACs
! Replaces 8 Potentiometers
! 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
! 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.
VREFH
VREFL
AS1505 Only
VDD
GND
SDI
CLK
CSN
DAC 1
Select
Address ⁸
3
11-Bit
Serial Latch 8
D
CK RSN
8-Bit
Latch
8
CK RSN
VREFH
DAC1 VOUT
VREFL
OUT1
AS1504/
AS1505
8-Bit
Latch
CK RSN
VREFH
DAC8 VOUT
VREFL
8
OUT8
RSN AS1504 Only
SHDNN
www.austriamicrosystems.com
Revision 1.0
1 - 17