AS1505 Octal, 8-bit, High Accuracy, Low Power, DAC with Shutdown and Zero-Scale Voltage Setting0 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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