- 您现在的位置：买卖IC网 > PDF目录98252 > TLV2544IPWLE (TEXAS INSTRUMENTS INC) 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 PDF资料下载
参数资料
| 型号： | TLV2544IPWLE |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| 文件页数： | 10/39页 |
| 文件大小： | 648K |
| 代理商： | TLV2544IPWLE |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页
TLV2544, TLV2548
2.7 V TO 5.5 V, 12-BIT, 200 KSPS, 4/8 CHANNEL, LOW POWER,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
SLAS198A –FEBRUARY 1999– REVISED AUGUST 1999
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FIFO operation
76543210
ADC
12-BIT
×8
FIFO
OD
Serial
FIFO Full
FIFO 3/4 Full
FIFO 1/2 Full
FIFO 1/4 Full
FIFO Threshold Pointer
Figure 15. TLV2544/TLV2548 FIFO
The device has an 8 layer FIFO that can be programmed for different thresholds. An interrupt is sent to the host
after the preprogrammed threshold is reached. The FIFO can be used to store data from either a fixed channel
or a series of channels based on a preprogrammed sweep sequence. For example, an application may require
eight measurements from channel 3. In this case, the FIFO is filled with 8 data sequentially taken from channel
3. Another application may require data from channel 0, channel 2, channel 4, and channel 6 in an orderly
manner. Therefore, the threshold is set for 1/2 and the sweep sequence 0–2–4–6–0–2–4–6 is chosen. An
interrupt is sent to the host as soon as all four data are in the FIFO.
SCLK and conversion speed
There are multiple ways to adjust the conversion speed.
D The SCLK can be used as the source of the conversion clock.
The onboard OSC is approximately 4 MHz and 13 conversion clocks are required to complete a conversion.
This leads to a 3
s conversion time plus 0.5 s overhead. The devices can operate with an SCLK up to 20
MHz for the supply voltage range specified. When a more accurate conversion time is desired, the SCLK
can be used as the source of the conversion clock. The clock divider provides speed options appropriate for
an application where a high speed SCLK is used for faster I/O. The total conversion time is 13
× (DIV/fSCLK)
where DIV is 1, 2, or 4. For example a 20 MHz SCLK with the divide by 4 option produces a {13
× (4/20 M) +
0.5
s} = 3.1 s conversion time. When an external serial clock (SCLK) is used as the source of the
conversion clock, the maximum equivalent conversion clock (fSCLK/DIV) should not exceed 6 MHz.
D Auto power down can be used. This mode is always on. If the device is not accessed (by CS or CSTART),
the converter is powered down to save power. The built-in reference is left on in order to quickly resume
operation within one half SCLK period. This provides unlimited choices to trade speed with power savings.
reference voltage
The device has a built-in reference with a programmable level of 2 V or 4 V. If the internal reference is used,
REFP is set to 2 V or 4 V and REFM is set to 0 V. An external reference can also be used through two reference
input pins, REFP and REFM, if the reference source is programmed as external. The voltage levels applied to
these pins establish the upper and lower limits of the analog inputs to produce a full-scale and zero-scale
reading respectively. The values of REFP, REFM, and the analog input should not exceed the positive supply
or be lower than GND consistent with the specified absolute maximum ratings. The digital output is at full scale
when the input signal is equal to or higher than REFP and at zero when the input signal is equal to or lower than
REFM.
相关PDF资料 |
PDF描述 |
|---|---|
| TLV2544CPWLE | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| TLV2548MFK | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CQCC20 |
| TLV2548MPWREP | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| TLV2553IDWG4 | 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| TLV2553IPWR | 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV2544IPWR | 功能描述:模数转换器 - ADC 12-Bit 200 kSPS Serial Out RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLV2544IPWRG4 | 功能描述:模数转换器 - ADC 12-Bit 200 kSPS Serial Out RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLV2544QD | 功能描述:模数转换器 - ADC 12-Bit 200 kSPS Lo-Pwr RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLV2544QDG4 | 功能描述:模数转换器 - ADC 12B 200 kSPS ADC Ser. Out Lo Pwr RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLV2544QDR | 功能描述:模数转换器 - ADC 12 Bit 200 kSPS Lo Pwr RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
发布紧急采购，3分钟左右您将得到回复。