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参数资料
| 型号： | TLV2542IDR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封装： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 27/31页 |
| 文件大小： | 778K |
| 代理商： | TLV2542IDR |
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TLV2541, TLV2542, TLV2545
2.7-V TO 5.5-V, LOW-POWER, 12-BIT, 140/200 KSPS,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTOPOWER DOWN
SLAS245E MARCH 2000 REVISED APRIL 2010
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
control and timing (continued)
D Control via both CS and FS—The MSB is presented after the falling edge of CS. The falling edge of FS is
the start of the sampling cycle. The MSB should be read on the first falling SCLK edge after FS is low. Output
data changes on the rising edge of SCLK. This configuration is typically used for multiple devices connected
to a TMS320 DSP.
TLV2542/5
All control is provided using CS (pin 1) on the TLV2542 and TLV2545. The cycle is started on the falling edge
transition provided by either a CS signal from an SPI microcontroller or FS signal from a TMS320 DSP. Timing
is similar to the TLV2541, with control via CS only.
TLV2542 channel MUX reset cycle
The TLV2542 uses CS to reset the analog input multiplexer. A short active CS cycle (4 to 7 SCLKs) resets the
MUX to AIN0. When the CS cycle time is greater than 7 SCLKs in duration, as in the case for a complete
conversion cycle (CS is low for 16 SCLKs plus maximum conversion time), the MUX toggles to the next channel
(see Figure 4 for timing). One dummy conversion cycle is recommended after power up before attempting to
reset the MUX.
sampling
The converter sample time is 12 SCLKs in duration, beginning on the fifth SCLK received after the converter
has received a high-to-low CS transition (or a high-to-low FS transition for the TLV2541).
conversion
The TLV2541, TLV2542, and TLV2545 complete conversions in the following manner. The conversion is started
after the 16th SCLK falling edge and takes 3.5 μs to complete. Enough time (for conversion) should be allowed
before a rising CS or FS edge so that no conversion is terminated prematurely.
TLV2542 input channel selection is toggled on each rising CS edge. The MUX channel can be reset to AIN0
via CS as described in the earlier section and in Figure 4. The input is sampled for 12 SCLKs, converted, and
the result is presented on SDO during the next cycle. Care should also be taken to allow enough time between
samples to avoid prematurely terminating the cycle, which occurs on a rising CS transition if the conversion is
not complete.
The SDO data presented during a cycle is the result of the conversion of the sample taken during the previous
cycle.
timing diagrams/conversion cycles
SCLK
1
2
3
4
5
6
12
13
14
15
16
1
CS
FS
OD8
OD7
OD6
OD5
OD0
SDO
t(sample)
tc
t(powerdown)
7
OD10
OD11
OD9
Figure 2. TLV2541 Timing: Control via CS (FS = 1)
相关PDF资料 |
PDF描述 |
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| TLV2545IDR | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| TLV2542IDG4 | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| TLV2545CDGKR | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| TLV2545IDGKG4 | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV2542IDRG4 | 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 |
| TLV25431DW | 制造商:Texas Instruments 功能描述: |
| TLV2543C | 制造商:Texas Instruments 功能描述: |
| TLV2543CDB | 功能描述:模数转换器 - ADC 12-Bit 66 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 |
| TLV2543CDBG4 | 功能描述:模数转换器 - ADC 12-Bit 66 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 |
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