DAC8574 Datasheet, PDF (1/40 Pages) Texas Instruments – QUAD, 16-BIT, LOW-POWER, VOLTAGE OUTPUT, I2C INTERFACE DIGITAL-TO-ANALOG CONVERTER

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DAC8534 ®
DAC8574
SLAS377A – JANUARY 2003 – REVISED JUNE 2003
QUAD, 16-BIT, LOW-POWER, VOLTAGE OUTPUT,
I²C INTERFACE DIGITAL-TO-ANALOG CONVERTER
FEATURES
• Micropower Operation: 950 µA at 5 V V_DD
• Power-On Reset to Zero
• +2.7 V to +5.5 V Analog Power Supply
• 16-Bit Monotonic
• Settling Time: 10µs to ±0.003% FSR
• I²C™ Interface Up to 3.4 Mbps
• Data Transmit Capability
• On-Chip Output Buffer Amplifier, Rail-to-Rail
Operation
• Double-Buffered Input Register
• Address Support for up to Sixteen DAC8574s
• Synchronous Update Support for up to 64
Channels
• Operation From -40°C to 105°C
• Small 16 Lead TSSOP Package
APPLICATIONS
• Process Control
• Data Acquisition Systems
• Closed-Loop Servo Control
• PC Peripherals
• Portable Instrumentation
V_DD IOV_DD
DESCRIPTION
The DAC8574 is a low-power, quad channel, 16-bit
buffered voltage output DAC. Its on-chip precision out-
put amplifier allows rail-to-rail output swing to be
achieved. The DAC8574 utilizes an I²C compatible two
wire serial interface supporting high-speed interface
mode with address support of up to sixteen DAC8574’s
for a total of 64 channels on the bus.
The DAC8574 requires an external reference voltage
to set the output range of the DAC. The DAC8574
incorporates a power-on-reset circuit that ensures that
the DAC output powers up at zero volts and remains
there until a valid write takes place to the device. The
DAC8574 contains a power-down feature, accessed
via the internal control register, that reduces the current
consumption of the device to 200 nA at 5 V.
The low power consumption of this part in normal
operation makes it ideally suited to portable battery
operated equipment. The power consumption is less
than 5 mW at V_DD = 5 V reducing to 1 µW in
power-down mode.
The DAC8574 is available in a 16-lead TSSOP pack-
age.
V_REFH
Data
Buffer A
DAC
DAC A
Register A
Data
Buffer D
DAC
Register D
DAC D
18
V_OUTA
V_OUTB
V_OUTC
V_OUTD
SCL
SDA
I²C Block
Buffer
Control
8
Register
Control
Power - Down
Control Logic
Resistor
Network
A0 A1 GND
A2 A3 LDAC
V_REFL
I2C is a trademark of Philips Corporation.
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 in-
clude testing of all parameters.
Copyright © 2003, Texas Instruments Incorporated