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参数资料
| 型号： | PGA112AIDGST |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO10 |
| 封装： | GREEN, PLASTIC, MSOP-10 |
| 文件页数： | 14/47页 |
| 文件大小： | 1545K |
| 代理商： | PGA112AIDGST |
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CS
DOUT
SCLK
DIN
MSP430
CS
SCLK
DIN1
DOUT1
U1
CS
SCLK
DIN2
DOUT2
U2
PGA116/PGA117
10 A
m
PGA112
PGA113
DOUT
DIO
DIN
SERIAL DIGITAL INTERFACE: SPI
CS
DOUT
SCLK
DIN
MSP430
CS
SCLK
DIN1
DOUT1
U1
CS
SCLK
DIO
U2
PGA116/PGA117
PGA112/PGA113
,, PGA113
www.ti.com ............................................................................................................................................ SBOS424B – MARCH 2008 – REVISED SEPTEMBER 2008
On the PGA112/PGA113, there are digital output and
used (see Table 4) to ensure that data are written or
digital input gates both internally connected to the
read in the proper sequence. There is a special
DIO pin. DIN is an input-only gate and DOUT is a
daisy-chain NOP command (No OPeration) which,
digital output that can give a 3-state output. The DIO
when
presented
to
the
desired
device
in
the
pin has a weak 10
A pull-down current source to
daisy-chain, causes no changes in that respective
prevent the pin from floating in systems with a
device. Detailed timing diagrams for daisy-chain
high-impedance SPI DOUT line. When CS is high,
the
state
of
the
internal
DOUT
gate
is
high-impedance. When CS is low, the state of DIO
depends on the previous valid SPI communication;
either DIO becomes an output to clock out data or it
remains an input to receive data. This structure is
shown in Figure 60.
Figure 61. Daisy-Chain Read/Write Configuration
The PGA112/PGA113 can be used as the last device
in a daisy-chain as shown in Figure 62 if write-only
communication
is
acceptable,
because
the
PGA112/PGA113 have no separate DOUT pin to
connect back to the microcontroller DIN pin in order
to read back data in this configuration.
Figure 60. Digital I/O Structure—PGA112/PGA113
DAISY-CHAIN COMMUNICATIONS
To reduce the number of I/O port pins used on a
microcontroller, the PGA116/PGA117 support SPI
Figure 62. Daisy-Chain Write-Only Configuration
daisy-chain
communications
with
full
read/write
capability. A two-device daisy-chain configuration is
shown in Figure 61, although any number of devices
can
be
daisy-chained.
The
SPI
daisy-chain
communication uses a common SCLK and CS line
for all devices in the daisy chain, rather than each
device requiring a separate CS line. The daisy-chain
mode of communication routes data serially through
each device in the chain by using its respective DIN
and DOUT pins as shown. Special commands are
Copyright 2008, Texas Instruments Incorporated
21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PGA112AIDGSTG4 | 功能描述:特殊用途放大器 0-Drift Programmable Gain Amp RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| PGA112EVM | 功能描述:放大器 IC 开发工具 PGA112 Eval Mod 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 |
| PGA112EVM-B | 功能描述:放大器 IC 开发工具 PGA112 Eval Mod Rev B 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 |
| PGA113 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Single-Supply, Single-Ended, Precision Programmable Gain Amplifier with MUX |
| PGA113AIDGSR | 功能描述:特殊用途放大器 0-Drift Programmable Gain Amp RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
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