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參數(shù)資料
| 型號： | AD5399YRM |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | Twos Complement, Dual 12-Bit DAC with Internal REF and Fast Settling Time |
| 中文描述： | SERIAL INPUT LOADING, 0.8 us SETTLING TIME, 12-BIT DAC, PDSO10 |
| 封裝： | 1.1 MM HEIGHT, MO-187BA, MSOP-10 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 336K |
| 代理商： | AD5399YRM |
Twos Complement, Dual 12-Bit DAC
with Internal REF and Fast Settling Time
AD5399
FEATURES
2-channel 12-bit DAC
Twos complement facilitates bipolar applications
Bipolar zero with 2 V dc offset
Built-in 2.000 V precision reference with 10 ppm/°C typ TC
Buffered voltage output: 0 V to 4 V
Single-supply operation: 4.5 V to 5.5 V
Fast 0.8 μs settling time typ
Ultracompact MSOP-10 package
Monotonic DNL < ±1 LSB
Optimized accuracy at zero scale
Power-on reset to V
REF
3-wire serial data input
Extended temperature range: –40°C to +105°C
APPLICATIONS
Single-supply bipolar converter operations
General-purpose DSP applications
Digital gain and offset controls
Instrumentation level settings
Disk drive control
Precision motor control
GENERAL DESCRIPTION
Rev.
D
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
Tel: 781.329.4700Fax: 781.326.8703
The AD5399 is the industry-first dual 12-bit digital-to-analog converter that accepts twos complement digital coding with 2 V
dc offset for single-supply operation. Augmented with a built-in
precision reference and a solid buffer amplifier, the AD5399 is
the smallest self-contained 12-bit precision DAC that fits many
general-purpose as well as DSP specific applications. The twos
complement programming facilitates the natural coding
implementation commonly found in DSP applications, and
allows operation in single supply. The AD5399 provides a 2 V
reference output, V
REF
, for bipolar zero monitoring. It can also
be used for other on-board components that require a precision
reference. The device is specified for operation from 5 V ± 10%
single supply with bipolar output swing from 0 V to 4 V
centered at 2 V.
The AD5399 is available in the compact 1.1 mm low profile
MSOP-10 package. All parts are guaranteed to operate over the
extended industrial temperature range of –40°C to +105°C.
FUNCTIONAL BLOCK DIAGRAM
X2
×2
V
REF
2V
×2
DECODER SW
DRIVER A
DECODER SW
DRIVER B
ADDR
DECODE
DAC A
REGISTER
DAC B
REGISTER
16-BIT
D15...D0
POWER-ON
RESET
EN
A0
12
12
12
CLK
CS
SDI
DGND
AGND
V
TP
V
DD
V
BZ
+ 2V = 4V
V
BZ
– 2V = 0V
V
OUTA
V
OUTB
V
BZ
(V
REF
) = 2V
AD5399
0
Figure 1.
V
OUT
= ((
D
– 2048)/4096 × 4 V) + 2 V for 0 ≤
D
≤ 4095, where
D
is the decimal code.
Table 1. Examples of Twos Complement Codes
Twos Complement
2047
2046
1
0
4095
2049
2048
FS = Full Scale, BZS = Bipolar Zero Scale.
D
4095
4094
2049
2048
2047
1
0
Scale
+FS
+FS – 1 LSB
BZS + 1 LSB
BZS
BZS – 1 LSB
–FS + 1 LSB
–FS
V
OUT
(V)
4.000
3.999
2.001
2.000
1.999
0.001
0.000
V
OUT
= [(0 – 2048)/4096 × 4V] + 2V
0
1.0
0.5
3.0
3.5
2.0
1.5
2.5
4.0
0
512
1024
1536
2048
2560
3072
3584
4096
TWOS COMPLEMENT CODE
V
O
0
Figure 2. Output vs. Twos Complement Code
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