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AD7537JN 参数 Datasheet PDF下载

AD7537JN图片预览
型号: AD7537JN
PDF下载: 下载PDF文件 查看货源
内容描述: LC2MOS ( 8 + 4 )加载双通道12位DAC [LC2MOS (8+4) Loading Dual 12-Bit DAC]
分类和应用: 转换器数模转换器光电二极管信息通信管理
文件页数/大小: 8 页 / 209 K
品牌: AD [ ANALOG DEVICES ]
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a
FEATURES
Two 12-Bit DACs in One Package
DAC Ladder Resistance Matching: 0.5%
Space Saving Skinny DIP and Surface Mount Packages
4-Quadrant Multiplication
Low Gain Error (1 LSB max Over Temperature)
Byte Loading Structure
Fast Interface Timing
APPLICATIONS
Automatic Test Equipment
Programmable Filters
Audio Applications
Synchro Applications
Process Control
LC MOS
(8+4) Loading Dual 12-Bit DAC
AD7537
FUNCTIONAL BLOCK DIAGRAM
2
GENERAL DESCRIPTION
The AD7537 contains two 12-bit current output DACs on one
monolithic chip. A separate reference input is provided for each
DAC. The dual DAC saves valuable board space, and the
monolithic construction ensures excellent thermal tracking.
Both DACs are guaranteed 12-bit monotonic over the full tem-
perature range.
The AD7537 has a 2-byte (8 LSBs, 4 MSBs) loading structure.
It is designed for right-justified data format. The control signals
for register loading are A0, A1,
CS, WR
and
UPD.
Data is
loaded to the input registers when
CS
and
WR
are low. To
transfer this data to the DAC registers,
UPD
must be taken low
with
WR.
Added features on the AD7537 include an asynchronous
CLR
line which is very useful in calibration routines. When this is
taken low, all registers are cleared. The double buffering of the
data inputs allows simultaneous update of both DACs. Also,
each DAC has a separate AGND line. This increases the device
versatility; for instance one DAC may be operated with
AGND biased while the other is connected in the standard
configuration.
The AD7537 is manufactured using the Linear Compatible
CMOS (LC
2
MOS) process. It is speed compatible with most
microprocessors and accepts TTL, 74HC and 5 V CMOS logic
level inputs.
PRODUCT HIGHLIGHTS
1. DAC to DAC Matching:
Since both DACs are fabricated on the same chip, precise
matching and tracking is inherent. Many applications which
are not practical using two discrete DACs are now possible.
Typical matching: 0.5%.
2. Small Package Size:
The AD7537 is packaged in small 24-pin 0.3" DIPs and in
28-terminal surface mount packages.
3. Wide Power Supply Tolerance:
The device operates on a +12 V to +15 V V
DD
, with
±
10%
tolerance on this nominal figure. All specifications are
guaranteed over this range.
REV. 0
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