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AD420ARZ-32-REEL PDF预览

AD420ARZ-32-REEL

更新时间: 2024-01-07 19:36:49
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
16页 303K
描述
Serial Input 16-Bit 4 mA–20 mA, 0 mA–20 mA DAC

AD420ARZ-32-REEL 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:SOIC
包装说明:SOP, SOP24,.4针数:24
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:1.15
最大模拟输出电压:5 V最小模拟输出电压:
转换器类型:D/A CONVERTER输入位码:BINARY
输入格式:SERIALJESD-30 代码:R-PDSO-G24
JESD-609代码:e3长度:15.4 mm
最大线性误差 (EL):0.012%湿度敏感等级:3
位数:16功能数量:1
端子数量:24最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP24,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):260电源:24 V
认证状态:Not Qualified座面最大高度:2.65 mm
最大稳定时间:3000 µs标称安定时间 (tstl):2500 µs
子类别:Other Converters最大压摆率:5.5 mA
标称供电电压:24 V表面贴装:YES
技术:BICMOS温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:7.5 mm
Base Number Matches:1

AD420ARZ-32-REEL 数据手册

 浏览型号AD420ARZ-32-REEL的Datasheet PDF文件第2页浏览型号AD420ARZ-32-REEL的Datasheet PDF文件第3页浏览型号AD420ARZ-32-REEL的Datasheet PDF文件第4页浏览型号AD420ARZ-32-REEL的Datasheet PDF文件第5页浏览型号AD420ARZ-32-REEL的Datasheet PDF文件第6页浏览型号AD420ARZ-32-REEL的Datasheet PDF文件第7页 
Serial Input 16-Bit  
4 mA–20 mA, 0 mA–20 mA DAC  
AD420  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
V
CC  
4 mA–20 mA, 0 mA–20 mA or 0 mA–24 mA  
current output  
16-bit resolution and monotonicity  
0.012ꢀ max integral nonlinearity  
0.0ꢁꢀ max offset (trimmable)  
V
REFERENCE  
AD420  
LL  
4k  
40Ω  
REF OUT  
BOOST  
REF IN  
0.1ꢁꢀ max total output error (trimmable)  
Flexible serial digital interface (3.3 MBPS)  
On-Chip loop fault detection  
On-chip ꢁ V reference (2ꢁ ppm/°C max)  
Asynchronous CLEAR function  
CLOCK  
DATA OUT  
CLEAR  
LATCH  
CLOCK  
DATA IN  
I
OUT  
DATA I/P  
REGISTER  
V
OUT  
SWITCHED  
CURRENT  
SOURCES  
AND  
16-BIT  
DAC  
1.25kΩ  
FAULT  
DETECT  
RANGE  
SELECT 1  
FILTERING  
RANGE  
SELECT 2  
Maximum power supply range of 32 V  
Output loop compliance of 0 V to VCC − 2.7ꢁ V  
24-Lead SOIC and PDIP packages  
OFFSET CAP 1 CAP 2  
TRIM  
GND  
Figure 1.  
GENERAL DESCRIPTION  
The AD420 is a complete digital to current loop output  
converter, designed to meet the needs of the industrial control  
market. It provides a high precision, fully integrated, low cost  
single-chip solution for generating current loop signals in a  
compact 24-lead SOIC or PDIP package.  
user desires temperature stability exceeding 25 ppm/°C, an  
external precision reference such as the AD586 can be used as  
the reference. The AD420 is available in a 24-lead SOIC and  
PDIP over the industrial temperature range of −40°C to +85°C.  
PRODUCT HIGHLIGHTS  
The output current range can be programmed to 4 mA to  
20 mA, 0 mA to 20 mA or to an overrange function of 0 mA to  
24 mA. The AD420 can alternatively provide a voltage output from  
a separate pin that can be configured to provide 0 V to 5 V, 0 V  
to 10 V, 5 V, or 10 V with the addition of a single external  
buffer amplifier.  
1. The AD420 is a single chip solution for generating 4 mA to  
20 mA or 0 mA to 20 mA signals at the controller end of  
the current loop.  
2. The AD420 is specified with a power supply range from  
12 V to 32 V. Output loop compliance is 0 V to VCC − 2.75 V.  
3. The flexible serial input can be used in 3-wire mode  
with SPI® or MICROWIRE® microcontrollers, or in  
asynchronous mode, which minimizes the number of  
control signals required.  
The 3.3 M Baud serial input logic design minimizes the cost of  
galvanic isolation and allows for simple connection to commonly  
used microprocessors. It can be used in 3-wire or asynchronous  
mode and a serial-out pin is provided to allow daisy chaining of  
multiple DACs on the current loop side of the isolation barrier.  
4. The serial data out pin can be used to daisy chain any  
number of AD420s together in 3-wire mode.  
The AD420 uses sigma-delta (Σ-Δ) DAC technology to achieve  
16-bit monotonicity at very low cost. Full-scale settling to 0.1%  
occurs within 3 ms. The only external components that are  
required (in addition to normal transient protection circuitry)  
are two low cost capacitors which are used in the DAC out-  
put filter.  
5. At power-up, the AD420 initializes its output to the low  
end of the selected range.  
6. The AD420 has an asynchronous CLEAR pin, which sends  
the output to the low end of the selected range (0 mA, 4 mA,  
or 0 V).  
If the AD420 is used at extreme temperatures and supply  
voltages, an external output transistor can be used to minimize  
power dissipation on the chip via the BOOST pin. The FAULT  
DETECT pin signals when an open circuit occurs in the loop.  
The on-chip voltage reference can be used to supply a precision  
+5 V to external components in addition to the AD420 or, if the  
7. The AD420 BOOST pin accommodates an external  
transistor to off-load power dissipation from the chip.  
8. The offset of 0.05% and total output error of 0.15% can  
be trimmed if desired, using two external potentiometers.  
Rev. H  
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 registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
www.analog.com  
Fax: 781.461.3113 ©1999–2011 Analog Devices, Inc. All rights reserved.  
 

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