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DAC7512E250 开发手册 - TI（德州仪器）
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DAC7512E250数据手册
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APPLICATIONS
● PORTABLE BATTERY-POWERED
INSTRUMENTS
● DIGITAL GAIN AND OFFSET
ADJUSTMENT
● PROGRAMMABLE VOLTAGE AND
CURRENT SOURCES
Low-Power, Rail-to-Rail Output, 12-Bit Serial Input
DIGITAL-TO-ANALOG CONVERTER
DESCRIPTION
The DAC7512 is a low-power, single, 12-bit buffered voltage
output Digital-to-Analog Converter (DAC). Its on-chip preci-
sion output amplifier allows rail-to-rail output swing to be
achieved. The DAC7512 uses a versatile three-wire serial
interface that operates at clock rates up to 30MHz and is
compatible with standard SPI
™
, QSPI
™
, Microwire
™
, and
DSP interfaces.
The reference for the DAC7512 is derived from the power
supply, resulting in the widest dynamic output range possible.
The DAC7512 incorporates a power-on reset circuit that
ensures that the DAC output powers up at 0V and remains
there until a valid write takes place in the device. The
DAC7512 contains a power-down feature, accessed over the
serial interface, that can reduce the current consumption of
the device to 50nA at 5V.
The low power consumption of this part in normal operation
makes it ideally suited to portable battery-operated equip-
ment. The power consumption is 0.7mW at 5V reducing to
1µW in power-down mode.
The DAC7512 is available in a SOT23-6 package and an
MSOP-8 package.
DAC7512
DAC7512
FEATURES
● microPOWER OPERATION:
135µA at 5V
● POWER-DOWN: 200nA at 5V, 50nA at 3V
● POWER SUPPLY: +2.7V to +5.5V
●
TESTED MONOTONIC BY DESIGN
● POWER-ON RESET TO 0V
● THREE POWER-DOWN FUNCTIONS
● LOW POWER SERIAL INTERFACE WITH
SCHMITT-TRIGGERED INPUTS
● ON-CHIP OUTPUT BUFFER AMPLIFIER,
RAIL-TO-RAIL OPERATION
● SYNC INTERRUPT FACILITY
● SOT23-6 AND MSOP-8 PACKAGES
Power-On
Reset
DAC
Register
REF (+) REF (–)
12-Bit
DAC
Output
Buffer
Input
Control
Logic
Power-Down
Control Logic
Resistor
Network
SYNC
SCLK D
IN
V
DD
GND
V
OUT
SPI and QSPI are registered trademarks of Motorola.
Microwire is a registered trademark of National Semiconductor.
DAC7512
SBAS156B – JULY 2002
www.ti.com
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 © 2002, Texas Instruments Incorporated
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.
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