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參數(shù)資料
| 型號(hào)： | AD5314 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Dual Rail-To-Rail,Voltage Output 10-Bit DACs(滿幅度電壓輸出雙10位D/A轉(zhuǎn)換器) |
| 中文描述： | 雙通道軌至軌電壓輸出10位DAC（滿幅度電壓輸出雙10位的D / A轉(zhuǎn)換器） |
| 文件頁(yè)數(shù)： | 1/6頁(yè) |
| 文件大?。?/td> | 317K |
| 代理商： | AD5314 |
until a valid write takes place to the device. The part contains a
power-down feature which reduces the current consumption of
the device to 200nA at 5V (50nA at 3V). The outputs are in a
high-impedance state while in power-down mode. All DACs are
powered-down together over the serial interface.
The four control bits in the 16-bit serial input word are used to
address the relevant DAC, to simultaneously update the outputs
(
LDAC
bit) and to power-down the DACs (
PD
bit).
a
Prelim Technical Information
AD5304/14
FEATURES
AD5304: Four 8-Bit DACs in One Package
AD5314: Four 10-Bit DACs in One Package
10-Pin microSOIC Package
Micro-Power Operation: 500
μ
A @ 5V
Power Down to 200nA@5V, 50nA@3V
+2.5V to +5.5V Power Supply
Double-Buffered Input Logic
Guaranteed Monotonic By Design
Output Range: 0-Vref
Power-On-Reset to Zero Volts
Simultaneous Update of DAC Outputs
Low-Power Serial Interface with Schmitt-Triggered
Inputs
On-Chip Output Buffer Amplifiers with Rail-to-Rail
Operation
SYNC
Interrupt Facility
APPLICATIONS
Portable Battery Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage and Current Sources
Programmable Attenuators
GENERAL DESCRIPTION
The AD5304/14 are quad 8 and 10-bit buffered voltage out
DACs which operate from a single +2.5V to +5.5V supply. Their
on-chip precision output amplifiers allow rail-to-rail output
swing to be achieved. The AD5304/14 utilize a versatile 3-wire
serial interface which operates at clock rates up to 30MHz and is
compatible with standard SPI, QSPI, MICROWIRE and
DSP interface standards.
The references for the four DACs are derived from one reference
pin. The part incorporates a power-on-reset circuit that ensures
that the DAC outputs power up to zero volts and remain there
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
The low power consumption of these parts in normal operation
make them ideally suited to portable battery-operated equip-
ment. The power consumption is 2.5mW at 5V reducing to 1μW
in power-down mode.
PRODUCT HIGHLIGHTS
1. Low Power, Single supply operation. This part operates from
a single +2.5V to +5.5V supply and consumes 1.2 mW at 3V
and 2.5 mW at 5V making it ideal for battery powered appli-
cations.
2. The on-chip output buffer amplifiers allow the outputs of the
DACs to swing rail-to-rail with a slew rate of 1V/μs.
3. Reference input pin may be as high as V
DD
.
4. High speed serial interface with clock speeds up to 30MHz.
Designed for very low power consumption. The interface only
powers up during a write cycle.
5. Power-down capability. When powered down the DACs con-
sume 50nA at 3V and 200nA at 5V.
6. Output range of 0-V
REF
.
7. Packaged in a 10-pin
μ
SOIC package.
Prelim.A2 4/98
+2.5 V to +5.5 V, 500uA, Quad Rail-To-Rail,
Voltage Output 8/10-Bit DACs
FUNCTIONAL BLOCK DIAGRAM
SPI
,
QSPI
are Trademarks of Motorola.
MICROWIRE
is a Trademark of National Semiconductor.
DAC
LATCH
DAC A
INPUT
LATCH
CONTROL
LOGIC
AD5304/14
VOUT A
VOUT B
DAC
LATCH
DAC B
INPUT
LATCH
DAC
LATCH
DAC C
INPUT
LATCH
DAC
LATCH
DAC D
INPUT
LATCH
VOUT C
VOUT D
REF IN
GND
VDD
SYNC
CLK
SDIN
POWER-ON
RESET
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