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| 型号： | AD5311 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | 2-Wire Serial Input, Voltage Output 10-Bit DACs(二线串入,电压输出,10位D/A转换器) |
| 中文描述： | 2线串行输入，电压输出10位DAC（二线串入，电压输出，10位的D / A转换器） |
| 文件页数： | 1/8页 |
| 文件大小： | 320K |
| 代理商： | AD5311 |
and are always 000110 for the 6-pin package. The first five bits
are programmed as 00011 for the 8-pin package.
The reference for the AD5301/11/21 is derived from the power
supply inputs and thus gives the widest dynamic output range.
The parts incorporate a power-on-reset circuit that ensures
that the DAC outputs power up to zero volts and remain there
until a valid write takes place to the device. The parts contain a
power-down feature which reduces the current consumption of
to 50nA @ 3V. The parts are put into power-down mode over
the serial interface with an extra option of a hardware power-
down using the
PD
pin in the 8-pin versions.
The low power consumption of these parts in normal operation
makes them ideally suited to portable battery-operated equip-
ment. The power consumption is 0.7mW at 5V reducing to
1μW in power-down mode.
a
Prelim Technical Information
AD5301/11/21
FEATURES
AD5301: Single 8-Bit DAC
AD5311: Single 10-Bit DAC
AD5321: Single 12-Bit DAC
6 Pin SOT-23 and 8-pin microSOIC Packages
Micropower Operation: 140μA @ 5V (including Reference
Current)
Power Down to 200nA @ 5V, 50nA @ 3V
+2.5V to +5.5V Operation
Guaranteed Monotonic by Design
Reference derived from Power Supply
Power-On-Reset to Zero Volts
2-Wire Serial Interface
On-Chip Output Buffer Amplifier, Rail-to-Rail Operation
APPLICATIONS
Portable Battery Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage and Current Sources
Programmable Attenuators
GENERAL DESCRIPTION
The AD5301/11/21 are single 8, 10 and 12-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 out-
put swing to be achieved. The AD5301/11/21 utilize a 2-wire
serial interface which operates at clock rates up to 400kHz.
This simple interface allows communication between multiple
devices on a single bus. The AD5301/11/21 contain A0 and A1
pins which allow the 2 LSBs of the 7-bit slave address to be set
by the user. The first six bits have been factory programmed
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.
WWW: http://www.analog.com
Tel: 781/329-4700
Fax: 781/326-8703
PRODUCT HIGHLIGHTS
1. Low-power, single-supply operation. These parts operate
from a single +2.5V to +5.5V supply and consume typically
0.35mW at 3V and 0.7mW at 5V making them ideal for
battery-powered applications.
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 derived from the power supply.
4. 2-Wire serial interface with clock speeds up to 400kHz.
5. Power-down capability. When powered down the DAC con-
sume 50nA at 3V and 200nA at 5V.
6. Packaged in 6-pin SOT-23 and in 8-Lead MicroSOIC pack-
ages.
Prelim.H1 8/98
FUNCTIONAL BLOCK DIAGRAM
+2.5 V to +5.5 V, 140
μ
A, 2-Wire Serial
Input, Voltage Output 8/10/12-Bit DACs
6-Lead SOT-23
8-Lead MicroSOIC
INPU T
REGISTE R
POWER -ON -
RESE T
S DA
SC L
VD D
AD5301/11/21
GN D
OU T PUT
BU FF ER
R EF (+)
R EF (-)
D AC
R EGIS TER
DAC
CORE
PD
R ESIS TOR
NET W ORK
POW ER-DOW N
C ONT ROL L OGIC
VOU T
A 1
A 0
IN PUT
R EGIST ER
POW ER-ON-
R ESET
SD A
SC L
VD D
AD5301/11/21
GND
BU FF ER
REF (+)
REF (-)
D AC
REGISTER
DAC
CORE
RESISTOR
N ETW ORK
CPOWER -D OW N
VOU T
A 0
Analog Devices, Inc., 1998
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