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LDMOS RF Power-Amplifier Bias
Controller
Typical Operating Circuit
4.7k Ω
3 PLACES
5V
V CC
28V
FAULT
SDA
SCL
A2
A1
DS1870
FACTORY-CALIBRATED 13-BIT ADC
(CUSTOMER ADJUSTABLE FULL-
SCALE AND OFFSET VALUES)
V D
49.9k Ω
4.22k Ω
A0
I D1
N.C.
R POT2
R S2
R S1
R POT1
I D2
N.C.
GND
N.C.
N.C.
MAX6165B
5V REFERENCE
RF
RF IN
POWER
RF OUT
AMP
NOTES:
1) IN THIS CONFIGURATION, THE VOLTAGE RANGE OF W 1 AND W 2 IS
3V-5V. THIS RANGE CAN BE EXTENDED USING EXTERNAL RESISTORS.
2) ONE MAX6156B CAN BE USED WITH MULTIPLE DS1870s.
See Figure 5 for a read example using the repeated
start condition to specify the starting memory location.
Reading multiple bytes from a slave: The read opera-
tion can be used to read multiple bytes with a single
transfer. When reading bytes from the slave, the master
simply ACKs the data byte if it desires to read another
byte before terminating the transaction. After the master
reads the last byte it NACKs to indicate the end of the
transfer and generates a stop condition. This can be
done with or without modifying the address counter’s
location before the read cycle. The DS1870’s address
counter does not wrap on page boundaries during read
operations, but the counter will roll from its upper most
memory address FFh to 00h if the last memory location
is read during the read transaction.
Application Information
Power-Supply Decoupling
To achieve best results, it is recommended that the power
supply is decoupled with a 0.01μF or a 0.1μF capacitor.
Use high-quality, ceramic, surface-mount capacitors, and
mount the capacitors as close as possible to the V CC and
GND pins to minimize lead inductance.
____________________________________________________________________
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相关代理商/技术参数
DS1870K 制造商:Maxim Integrated Products 功能描述:DS1870 EVALUATION KIT - Bulk
DS1873 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Analog LDD Interface
DS1873T+ 功能描述:ADC / DAC多通道 SFP+ Ctrl w/Analog RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40
DS1873T+T&R 制造商:Maxim Integrated Products 功能描述:5X5 TQFN SFP+ CTRL W/ANALOG - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CTLR SFP+ ANLG LDD 28-TQFN
DS1873T+T&R 功能描述:ADC / DAC多通道 SFP+ Ctrl w/Analog RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40
DS1873T+TR 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Analog LDD Interface
DS1874 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Digital LDD Interface
DS1874T+ 功能描述:ADC / DAC多通道 SFP+ Controller w/ Dgtl LDD Interface RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40