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參數資料
| 型號： | TLC2554CD |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| 封裝： | GREEN, PLASTIC, MS-012AC, SOIC-16 |
| 文件頁數： | 34/48頁 |
| 文件大小： | 1072K |
| 代理商： | TLC2554CD |
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TLC2554, TLC2558
5-V, 12-BIT, 400 KSPS, 4/8 CHANNEL, LOW POWER,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
SLAS220A –JUNE 1999
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions (Continued)
TERMINAL
NAME
NO.
I/O
DESCRIPTION
NAME
TLC2554
TLC2558
SDO
1
O
The 3-state serial output for the A/D conversion result. SDO is kept in the high-impedance state
when CS is high and after the CS falling edge and until the MSB (D15) is presented. The output
format is MSB (D15) first.
When FS is not used (FS = 1 at the falling edge of CS), the MSB (D15) is presented to the SDO
pin after the CS falling edge, and successive data are available at the rising edge of SCLK.
When FS is used (FS = 0 at the falling edge of CS), the MSB (D15) is presented to SDO after the
falling edge of CS and FS = 0 is detected. Successive data are available at the falling edge of SCLK.
(This is typically used with an active FS from a DSP.)
For conversion and FIFO read cycles, the first 12 bits are the result from the previous conversion
(data) followed by 4 trailing zeros. The first four bits from SDO for CFR read cycles should be
ignored. The register content is in the last 12 bits. SDO is 3 stated after the 16th bit.
REFM
14
18
I
External reference input or internal reference decoupling.
REFP
15
19
I
External reference input or internal reference decoupling. (Shunt capacitors of 10
F and 0.1 F
between REFP and REFM.) The maximum input voltage range is determined by the difference
between the voltage applied to this terminal and the REFM terminal when an external reference
is used.
VCC
5
I
Positive supply voltage
detailed description
analog inputs and internal test voltages
The 4/8 analog inputs and three internal test inputs are selected by the analog multiplexer depending on the
command entered. The input multiplexer is a break-before-make type to reduce input-to-input noise injection
resulting from channel switching.
pseudo-differential/single-ended input
All analog inputs can be programmed as single-ended or pseudo-differential mode. Pseudo-differential mode
is enabled by setting CFR.D7 – 1. Only three analog input channels (or seven channels for TLC2558) are
available for TLV2554 since one input (A1 for TLC2554 or A2 for TLC2558) is used as the MINUS input when
pseudo-differential mode is used. The minus input pin can have a maximum
±0.2 V ripple. This is normally used
for ground noise rejection.
converter
The TLC2554/58 uses a 12-bit successive approximation ADC and 2-bit resistor string. The CMOS threshold
detector in the successive-approximation conversion system determines each bit by examining the charge on
a series of binary-weighted capacitors (see Figure 1). In the first phase of the conversion process, the analog
input is sampled by closing the SC switch and all ST switches simultaneously. This action charges all the
capacitors to the input voltage.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TLC2554CDG4 | 功能描述:模數轉換器 - ADC 12-bit 400 KSPS 4-Ch Serial w/Powerdown RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC2554CDR | 功能描述:模數轉換器 - ADC 12-bit 400 KSPS 4-Ch Serial w/Powerdown RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC2554CDRG4 | 功能描述:模數轉換器 - ADC 12-bit 400 KSPS 4-Ch Serial w/Powerdown RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC2554CPW | 功能描述:模數轉換器 - ADC 12-bit 400 KSPS 4-Ch Serial w/Powerdown RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TLC2554CPWG4 | 功能描述:模數轉換器 - ADC 12-bit 400 KSPS 4-Ch Serial w/Powerdown RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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