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參數資料
| 型號： | EVAL-AD5421SDZ |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/36頁 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD5421 |
| 標準包裝： | 1 |
| DAC 的數量： | 1 |
| 位數： | 16 |
| 數據接口： | 串行，SPI? |
| 設置時間： | 50µs |
| DAC 型： | 電壓 |
| 工作溫度： | -40°C ~ 105°C |
| 已供物品： | 板 |
| 已用 IC / 零件： | AD5421 |
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16-Bit, Serial Input,
Loop-Powered, 4 mA to 20 mA DAC
Data Sheet
Rev. G
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
2011–2013 Analog Devices, Inc. All rights reserved.
FEATURES
16-bit resolution and monotonicity
Pin selectable NAMUR-compliant ranges
4 mA to 20 mA
3.8 mA to 21 mA
3.2 mA to 24 mA
NAMUR-compliant alarm currents
Downscale alarm current = 3.2 mA
Upscale alarm current = 22.8 mA/24 mA
Total unadjusted error (TUE): 0.05% maximum
INL error: 0.0035% FSR maximum
Output TC: 3 ppm/°C typical
Quiescent current: 300 A maximum
Flexible SPI-compatible serial digital interface
with Schmitt triggered inputs
On-chip fault alerts via FAULT pin or alarm current
Automatic readback of fault register on each write cycle
Slew rate control function
Gain and offset adjust registers
On-chip reference TC: 4 ppm/°C maximum
Selectable regulated voltage output
Loop voltage range: 5.5 V to 52 V
Temperature range: 40°C to +105°C
TSSOP and LFCSP packages
APPLICATIONS
Industrial process control
4 mA to 20 mA loop-powered transmitters
Smart transmitters
HART network connectivity
GENERAL DESCRIPTION
The AD5421 is a complete, loop-powered, 4 mA to 20 mA
digital-to-analog converter (DAC) designed to meet the needs
of smart transmitter manufacturers in the industrial control
industry. The DAC provides a high precision, fully integrated,
low cost solution in compact TSSOP and LFCSP packages.
The AD5421 includes a regulated voltage output that is used to
power itself and other devices in the transmitter. This regulator
provides a regulated 1.8 V to 12 V output voltage. The AD5421
also contains 1.22 V and 2.5 V references, thus eliminating the
need for a discrete regulator and voltage reference.
The AD5421 can be used with standard HART FSK protocol
communication circuitry without any degradation in specified
performance. The high speed serial interface is capable of opera-
ting at 30 MHz and allows for simple connection to commonly
used microprocessors and microcontrollers via a SPI-compatible,
3-wire interface.
The AD5421 is guaranteed monotonic to 16 bits. It provides
0.0015% integral nonlinearity, 0.0012% offset error, and
0.0006% gain error under typical conditions.
The AD5421 is available in a 28-lead TSSOP and a 32-lead LFCSP
specified over the extended industrial temperature range of
40°C to +105°C.
COMPANION LOW POWER PRODUCTS
HART Modem: AD5700, AD5700-1
Microcontroller: ADuCM360
FUNCTIONAL BLOCK DIAGRAM
RSET
24k
SYNC
SCLK
SDIN
SDO
LDAC
RANGE0
RANGE1
ALARM_CURRENT_DIRECTION
FAULT
RINT/REXT
INPUT
REGISTER
CONTROL
LOGIC
GAIN/OFFSET
ADJUSTMENT
REGISTERS
TEMPERATURE
SENSOR
REFOUT2
REFIN
CIN REXT1 REXT2
REFOUT1
VREF
16
16-BIT
DAC
LOOP
VOLTAGE
MONITOR
VLOOP
DVDD
IODVDD
AD5421
VOLTAGE
REGULATOR
REG_SEL0 REG_SEL1 REG_SEL2 REGOUT REGIN
DRIVE
LOOP–
11.5k
52
09128-
001
COM
Figure 1.
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| EVAL-AD5424EB | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk 制造商:Rochester Electronics LLC 功能描述: |
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