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| 型号： | A8292SETTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 12/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LNB SUPPLY/CONTROL 28-MLP |
| 标准包装： | 1 |
| 应用： | 转换器，模拟和数字式卫星信号接收器 |
| 输入电压： | 8 V ~ 16 V |
| 输出数： | 2 |
| 输出电压： | 12.7 V ~ 20.4 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-VFQFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN/MLP 裸露焊盘（5x5） |
| 包装： | 标准包装 |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1187-6 |
A8292
Dual LNB Supply and Control Voltage Regulator
Control Registers (I 2 C?-Compatible Write Register)
All main functions of the A8292 are controlled through the
I 2 C?-compatible interface via the 8-bit Control registers. As the
A8292 contains numerous control options, as well as featuring
two channels, it is necessary to have four Control registers. Each
register contains up to 6 bits of data (bit 0 to bit 5), followed by 2
bits for the register address (bit 6 and bit 7). The power-up states
for the control functions are all 0s.
The following tables define the control bits for each address
and the settings for output voltage:
Table 2. Control Registers with Address (I1, I0) = 00 and 01
Name
Channel 1
Channel 2
Bit
0
1
2
3
4
5
(Address: I1, I0 = 00)
VSEL 0 1
VSEL 1 1
VSEL 2 1
VSEL 3 1
ODT1
ENB1
(Address: I1, I0 = 01)
VSEL 0 2
VSEL 1 2
VSEL 2 2
VSEL 3 2
ODT2
ENB2
Setting
See table 4, Output Voltage Amplitude Selection
0: LNB x = Low range
1: LNB x = High range
1 (recommended): The ODT functions are always
enabled, but setting 1 recommended at all times.
0: Disable LNB x Output
1: Enable LNB x Output
Address Bit
6
I0
I0
Channel 1: 0
Channel 2: 1
Address Bit
7
I1
I1
Channel 1: 0
Channel 2: 0
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
VSEL 0 x
VSEL 1 x
VSEL 2 x
VSEL 3 x
ODT x
ENB x
I0
I1
These three bits provide incremental control over the voltage on the LNB x output.
The available voltages provide the necessary levels for all the common standards
plus the ability to add line compensation in increments of 333 mV. The voltage levels are
defined in table 4, Output Voltage Amplitude Selection.
Switches between the low level and high level output voltages on the LNB x output. 0 selects
the low level voltage and 1 selects the high level. The low-level center voltage is 12.709 V
nominal and the high level is 18.042 V nominal. These may be increased in steps of 333 mV
using the VSEL 2 x , VSEL 1 x and VSEL 0 x control register bits.
The overcurrent disable timers are always enabled.
Enables the LNB x output. When set to 1 the LNB x output is switched on. When set to 0,
the LNB x output is disabled.
Address
Address
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
12
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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