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参数资料
| 型号： | MAX11008BETM+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 28/67页 |
| 文件大小： | 0K |
| 描述： | IC CTLR LDMOS BIAS DUAL 48TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 43 |
| 功能： | 偏压控制器 |
| RF 型： | 手机 |
| 次要属性： | 片上 4Kb EEPROM |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 包装： | 托盘 |
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Dual RF LDMOS Bias Controller with
Nonvolatile Memory
V DAC = DACREF
Figure 16 shows the functional diagram of the
MAX11008 DACs. Each DAC includes an input and
output register. The input registers hold the result of the
most recent write operation, and the output registers
hold the current output code for the respective DAC.
Data written to a DAC input register is transferred to its
output register by writing to the Load DAC register (see
Table 22). Alternatively, write data directly to the output
register using the DAC Input and Output Data register.
The analog output voltages of the DACs (before amplifi-
cation by the gate-drive amplifiers) are calculated with
the following equation:
V × CODE
4096
where V DACREF is the value of the internal or external
reference voltage and CODE is the decimal value of the
12-bit code contained in the output register.
Gate-Drive Amplifiers
The gate-drive amplifiers are proportional to the analog
outputs of the 12-bit DACs and provide the necessary
gate voltage to drive the external LDMOS transistors.
Both amplifiers have a fixed gain of 2V/V and are capa-
ble of sourcing or sinking up to 2mA of current. Output
short-circuit protection prevents output currents from
exceeding ±25mA.
The gate output is equal to the DAC output voltage
amplified by 2.
V GATE_ = 2 x V DAC
See the Software Configuration Registers and
Temperature/APC LUT Configuration Registers sections
for information on how the gate voltages are controlled
by temperature and APC samples.
Output Clamp
The MAX11008 features an output clamp mode that
protects the external LDMOS transistors by connecting
the gate-drive amplifier outputs (GATE_) to AGND. The
clamp mode can be controlled by the OPSAFE_ digital
inputs or by setting the appropriate ALMCLMP[1:0] bits
in the Alarm Hardware Configuration register (see
Table 14). When using the OPSAFE_ digital inputs, pull
OPSAFE_ high to enter clamp mode and pull OPSAFE_
low to exit clamp mode. The clamp can also be activat-
ed automatically from the alarm trip point setting regis-
ters; see the Alarm Software Configuration Register
(ALMSCFIG) (Read/Write) section.
Self-Calibration
Calibrate channel 1 and channel 2 by writing to the
PGA Calibration Control register. The MAX11008 func-
tions after power-up without a calibration. Command a
calibration after powering up the device by setting the
TRACK bit to 0 and the DOCAL bit to 1 (see Table 19).
Subsequently, set the TRACK, DOCAL, and SELFTIME
bits to 1 to enable automatic self-calibration (approxi-
mately every 13ms). This minimizes loss of perfor-
mance over temperature and supply-voltage variation.
Alternatively, run self-calibration manually to control the
timing of the operation. Set the TRACK and DOCAL bits
to 1 and the SELFTIME bit to 0 to perform manually trig-
gered self-calibration.
The self-calibration algorithm cancels offsets at the
PGA-drive amplifier inputs in approximately 50μV incre-
ments to improve accuracy. The self-calibration routine
can be commanded when the DACs are powered
down, but the results will not be accurate. For best
results, run the calibration after the DAC power-up time,
t DPUEXT . The ADC’s operation is suspended during a
self-calibration. The BUSY output returning low indi-
cates the end of the self-calibration routine. Wait until
the end of the self-calibration routine before requesting
an ADC conversion.
Channel 1/Channel 2
CHANNEL 1/CHANNEL 2
DAC INPUT REGISTERS
Figure 16. DAC Functional Diagram
LDDACCH_
SET TO 1 IN
LOAD DAC
REGISTER
CHANNEL 1/CHANNEL 2
DAC OUTPUT REGISTERS
CHANNEL 1/
CHANNEL 2 DAC
28
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX11008BETM+ | 功能描述:射频放大器 Dual RF LDMOS Bias Controller w/NV Mem RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX11008BETM+T | 功能描述:射频放大器 Dual RF LDMOS Bias Controller w/NV Mem RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX11008EVC16 | 功能描述:放大器 IC 开发工具 MAX11008 Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX11008EVKIT+ | 功能描述:放大器 IC 开发工具 MAX11008 Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX1100CWG | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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