參數(shù)資料
型號(hào)： TLV1548QDBREP
廠(chǎng)商： TEXAS INSTRUMENTS INC
元件分類(lèi)： ADC
英文描述： 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封裝： GREEN, SSOP-20
文件頁(yè)數(shù)： 31/35頁(yè)
文件大?。?/td> 686K
代理商： TLV1548QDBREP
TLV1548EP
LOW VOLTAGE 10BIT ANALOGTODIGITAL CONVERTER
WITH SERIAL CONTROL AND 8 ANALOG INPUTS
SGLS171A JUNE 2003 REVISED DECEMBER 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
I/O CLK
The I/O CLK can go up to 10 MHz for most of the voltage range when fast I/O is possible. The maximum I/O
CLK is limited to 2.8 MHz for a supply voltage range from 2.7 V. Table 1 lists the maximum I/O CLK frequencies
for all different supply voltage ranges. This also depends on input source impedance. For example, I/O CLK
speed faster than 2.39 MHz is achievable if the input source impedance is less than 1 k
.
Table 1. Maximum I/O CLK Frequency
VCC
MAXIMUM INPUT
RESISTANCE (Max)
SOURCE IMPEDANCE
I/O CLK
2.7 V
5 K
1 k
2.39 MHz
2.7 V
5 K
100
2.81 MHz
4.5 V
1 K
1 k
7.18 MHz
4.5 V
1 K
100
10 MHz
microprocessor serial interface
Input data bits from DATA IN are clocked in on the first four rising edges of the I/O CLK sequence if INV CLK
is held high when the device is in microprocessor interface mode. Input data bits are clocked in on the first four
falling edges of the I/O CLK sequence if INV CLK is held low. The MSB of the previous conversion appears on
DATA OUT on the falling edge of CS. The remaining nine bits are shifted out on the next nine edges (depending
on the state of INV CLK) of I/O CLK. Ten bits of data are transmitted to the host through DATA OUT.
A minimum of 9.5 clock pulses is required for the conversion to begin. On the tenth clock rising edge, the EOC
output goes low and returns to the high logic level when the conversion is complete; then the result can be read
by the host. On the tenth clock falling edge, the internal logic takes DATA OUT low to ensure that the remaining
bit values are zero if the I/O CLK transfer is more than ten clocks long.
CS is inactive (high) between serial I/O CLK transfers. Each transfer takes at least ten I/O CLK cycles. The falling
edge of CS begins the sequence by removing DATA OUT from the high-impedance state. The rising edge of
CS ends the sequence by returning DATA OUT to the high-impedance state within the specified delay time. Also,
the rising edge of CS disables I/O CLK and DATA IN within a setup time. A conversion does not begin until the
tenth I/O CLK rising edge.
A high-to-low transition on CS within the specified time during an ongoing cycle aborts the cycle, and the device
returns to the initial state (the output data register holds the previous conversion result). CS should not be taken
low close to completion of conversion because the output data can be corrupted.
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參數(shù)描述
TLV1548QDBRG4Q1 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10B 85kSPS ADC Ser. Out RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
TLV1548QDBRQ1 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10B Analog/Digital Converter RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
TLV1549 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL
TLV1549C 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL
TLV1549CD 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3.3V 10bit A/D RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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