DAC8532
SBAS246A – DECEMBER 2001 – MAY 2003
Dual Channel, Low Power, 16-Bit, Serial Input
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q
microPOWER
OPERATION: 500
µ
A at 5V
q
POWER-ON RESET TO ZERO-SCALE
q
POWER SUPPLY: +2.7V to +5.5V
q
16-BIT MONOTONIC OVER TEMPERATURE
q
SETTLING TIME: 10
µ
s to
±
0.003% FSR
q
ULTRA-LOW AC CROSSTALK: –100dB typ
q
LOW-POWER SERIAL INTERFACE WITH
SCHMITT-TRIGGERED INPUTS
q
ON-CHIP OUTPUT BUFFER AMPLIFIER WITH
RAIL-TO-RAIL OPERATION
q
DOUBLE BUFFERED INPUT ARCHITECTURE
q
SIMULTANEOUS OR SEQUENTIAL OUTPUT
UPDATE AND POWERDOWN
q
TINY MSOP-8 PACKAGE
DESCRIPTION
The DAC8532 is a dual channel, 16-bit Digital-to-Analog
Converter (DAC) offering low power operation and a flexible
serial host interface. Each on-chip precision output amplifier
allows rail-to-rail output swing to be achieved over the supply
range of 2.7V to 5.5V. The device supports a standard 3-wire
serial interface capable of operating with input data clock
frequencies up to 30MHz for V
DD
= 5V.
The DAC8532 requires an external reference voltage to set
the output range of each DAC channel. Also incorporated
into the device is a power-on reset circuit which ensures that
the DAC outputs power up at zero-scale and remain there
until a valid write takes place. The DAC8532 provides a
flexible power-down feature, accessed over the serial inter-
face, that reduces the current consumption of the device to
200nA at 5V.
The low-power consumption of this device in normal opera-
tion makes it ideally suited to portable battery-operated
equipment and other low-power applications. The power
consumption is 2.5mW at 5V, reducing to 1µW in power-
down mode.
The DAC8532 is available in a MSOP-8 package with a
specified operating temperature range of –40°C to +105°C.
APPLICATIONS
q
q
q
q
q
q
PORTABLE INSTRUMENTATION
CLOSED-LOOP SERVO-CONTROL
PROCESS CONTROL
DATA ACQUISITION SYSTEMS
PROGRAMMABLE ATTENUATION
PC PERIPHERALS
V
DD
V
REF
Data
Buffer A
DAC
Register A
DAC A
V
OUT
A
Data
Buffer B
16
DAC
Register B
DAC B
V
OUT
B
SYNC
SCLK
D
IN
24-Bit
Serial-to-
Parallel
Shift
Register
Channel
Select
8
Load
Control
2
Power-Down
Control Logic
Resistor
Network
Control Logic
GND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 2001-2003, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
