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參數(shù)資料
| 型號： | EVAL-AD5700-1EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL HART MODEM AD5700 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 主要目的： | 電信，調(diào)制解調(diào)器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AD5700 |
| 主要屬性： | HART? FSK 半雙工調(diào)制解調(diào)器 |
| 已供物品： | 板 |
Low Power HART Modem
Data Sheet
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,nor for anyinfringements ofpatents orother
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
2012–2014 Analog Devices, Inc. All rights reserved.
FEATURES
HART-compliant fully integrated FSK modem
1200 Hz and 2200 Hz sinusoidal shift frequencies
115 μA maximum supply current in receive mode
Suitable for intrinsically safe applications
Integrated receive band-pass filter
Minimal external components required
Clocking optimized for various system configurations
Ultralow power crystal oscillator (60 μA maximum)
External CMOS clock source
Precision internal oscillator (AD5700-1only)
Buffered HART output—extra drive capability
8 kV HBM ESD rating
1.71 V to 5.5 V power supply
1.71 V to 5.5 V interface
40°C to +125°C operation
4 mm × 4 mm LFCSP package
HART physical layer compliant
UART interface
APPLICATIONS
Field transmitters
HART multiplexers
PLC and DCS analog I/O modules
HART network connectivity
GENERAL DESCRIPTION
and specified to operate as a HART FSK half-duplex modem,
complying with the HART physical layer requirements. The
AD5700/AD5700-1 integrate all of the necessary filtering, signal
detection, modulating, demodulating and signal generation
functions, thus requiring few external components. The 0.5%
precision internal oscillator on the AD5700-1 greatly reduces
the board space requirements, making it ideal for line-powered
applications in both master and slave configurations. The maxi-
mum supply current consumption is 115 μA, making the AD5700/
AD5700-1 an optimal choice for low power loop-powered applica-
tions. Transmit waveforms are phase continuous 1200 Hz and
2200 Hz sinusoids. The AD5700/AD5700-1 contain accurate
carrier detect circuitry and use a standard UART interface.
Table 1. Related Products
Part No.
Description
Quad-channel, 16-bit, serial input, 4 mA to 20 mA and
voltage output DAC, dynamic power control, HART
connectivity
16-bit, serial input, loop powered, 4 mA to 20 mA DAC
Single-channel, 12-bit/16-bit, serial input, 4 mA to 20 mA
current source DACs
Single-channel, 12-bit/16-bit, serial input, current
source and voltage output DACs
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
OSC
XTAL1
REF REF_EN
AGND
DGND
FILTER_SEL
CLKOUT
REG_CAP
VCC
RESET
CD
DUPLEX
IOVCC
HART_OUT
ADC_IP
HART_IN
RXD
TXD
RTS
CLK_CFG0
CLK_CFG1
XTAL_EN
AD5700/AD5700-1
XTAL2
CO
NT
R
O
L
O
G
IC
10435
-001
FSK
MODULATOR
VOLTAGE
REFERENCE
DAC
FSK
DEMODULATOR
BAND-PASS
FILTER AND
BIASING
ADC
BUFFER
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