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Pin
23
24
Name
SCLK
ADC2
I/O
I/O
I
Description
SPI clock signal. This pin is an output when operating as a master, and an input when operating as
a slave.
ADC input 2. Direct input when the ADC is operating in single-ended mode, positive differential input rela-
tive to ADC0 when the ADC is operating in differential mode.
ADC external reference voltage pin. The voltage at this pin can be used by the ADCs as a reference for
25
ADC_EXT_
REF
I/O
ratiometric measurements. With no external voltage or load applied, this pin presents a nominal 2.7 V out-
put through a 2.126 K source resistance. A low impedance external reference voltage in the range of 1 to
2.7 V may be applied to this pin as an option.
26
27
28
29
30
RSVD
RSVD
GND
RSVD
GND
-
-
-
-
-
Reserved pin. Leave unconnected.
Reserved pin. Leave unconnected.
Connect to the host circuit board ground plane.
Reserved pin. Leave unconnected.
Connect to the host circuit board ground plane.
DNT24 Antenna Connector
A U.FL miniature coaxial connector is provided on both DNT24 configurations for connection to the RFIO port. A
short U.FL coaxial cable can be used to connect the RFIO port directly to an antenna. In this case the antenna
should be mounted firmly to avoid stressing the U.FL coaxial cable due to antenna mounting flexure. Alternately,
a U.FL coaxial jumper cable can be used to connect the DNT24 module to a U.FL connector on the host circuit
board. The connection between the host circuit board U.FL connector and the antenna or antenna connector on
the host circuit board should be implemented as a 50 ohm stripline. Referring to Figure 2, the width of this stripline
depends on the thickness of the circuit board between the stripline and the groundplane. For FR-4 type circuit
C ir c u it B o a r d S tr ip lin e T r a c e D e ta il
C o p p e r
S tr ip lin e
T ra c e
Trace Separation from
50 ohm Microstrip
100 mil
150 mil
200 mil
Length of Trace Run
Parallel to Microstrip
125 mil
200 mil
290 mil
C o p p e r
G ro u n d
P la n e
F R -4 P C B
M a te r ia l
250 mil
300 mil
450 mil
650 mil
Figure 3
F o r 5 0 o h m
im p e d a n c e W
= 1 .7 5 * H
Figure 2
board materials (dielectric constant of 4.7), the width of the stripline is equal to 1.75 times the thickness of the cir-
cuit board. Note that other circuit board traces should be spaced away from the stripline to prevent signal cou-
pling, as shown in Figure 3. The stripline trace should be kept short to minimize its insertion loss.
www.RFM.com E-mail: info@rfm.com
? 2011-2012 by RF Monolithics, Inc.
Page 5 of 7
DNT24 - 08/01/12
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相关代理商/技术参数
DNT24MC 功能描述:射频模块 2.4GHz FHSS Radio SMD U.FL RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DNT24MCA 功能描述:射频模块 2.4GHz FHSS Radio SMD Chip Ant. RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DNT24MP 功能描述:射频模块 2.4GHz FHSS Radio Pinned U.FL RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DNT24MPA 功能描述:射频模块 2.4GHz FHSS Radio Pinned Chip Ant. RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DNT24P 功能描述:射频模块 2.4 GHz 10 and 63mW 128 Bit AES RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DNT24PA 功能描述:射频模块 2.4 GHz 10 and 63mW 128 Bit AES RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DNT25SX 制造商:CEEP 功能描述:SOCKET D T&D 25WAY
DNT37SX 制造商:CEEP 功能描述:SOCKET D T&D 37 WAY