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參數(shù)資料
| 型號： | ADS8371IB |
| 元件分類： | ADC |
| 英文描述： | 16BIT 750KHZ UNIPOLAR INPUT, MICRO POWER SAMPLING ANALOG TO DIGITAL CONVERTER WITH PARALLEL INTERFACE |
| 中文描述： | 16位750kHz的單極性輸入，微功耗采樣模數(shù)轉換器并行接口 |
| 文件頁數(shù)： | 29/32頁 |
| 文件大?。?/td> | 350K |
| 代理商： | ADS8371IB |
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SLAS390A JUNE 2003 REVISED DECEMBER 2003
www.ti.com
29
Reading Data
The ADS8371 outputs full parallel data in straight binary format as shown in Table 1. The parallel output is active when
CS and RD are both low. Any other combination of CS and RD sets the parallel output to 3-state. BYTE is used for
multiword read operations. BYTE is used whenever lower bits on the bus are output on the higher byte of the bus.
Refer to Table 1 for ideal output codes.
Table 1. Ideal Input Voltages and Output Codes
DESCRIPTION
Full scale range
ANALOG VALUE
(+Vref)
(+Vref)/65536
(+Vref) – 1 LSB
(+Vref)/2
(+Vref)/2 – 1 LSB
0 V
DIGITAL OUTPUT
STRAIGHT BINARY
Least significant bit (LSB)
BINARY CODE
1111 1111 1111 1111
HEX CODE
FFFF
+Full scale
Midscale
1000 0000 0000 0000
8000
Midscale – 1 LSB
0111 1111 1111 1111
7FFF
Zero
0000 0000 0000 0000
0000
The output data is a full 16-bit word (D15D0) on DB15–DB0 pins (MSBLSB) if BYTE is low.
The result may also be read on an 8-bit bus for convenience. This is done by using only pins DB15DB8. In this case
two reads are necessary: the first as before, leaving BYTE low and reading the 8 most significant bits on pins
DB15DB8, then bringing BYTE high. When BYTE is high, the low bits (D7D0) appear on pins DB15D8.
These multiword read operations can be done with multiple active RD (toggling) or with RD tied low for simplicity.
Table 2. Conversion Data Readout
BYTE
DATA READ OUT
DB15DB8 PINS
DB7DB0 PINS
High
D7D0
All one’s
Low
D15D8
D7D0
RESET
The device can be reset through the use of the combination fo CS and CONVST. Since the BUSY signal is held at
high during the conversion, either one of these conditions triggers an internal self-clear reset to the converter.
Issue a CONVST when CS is low and internal CONVERT state is high. The falling edge of CONVST starts a
reset.
Issue a CS (select the device) while internal CONVERT state is high. The falling edge of CS causes a reset.
Once the device is reset, all output latches are cleared (set to zeroes) and the BUSY signal is brought low. A new
sampling period is started at the falling edge of the BUSY signal immediately after the instant of the internal reset.
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| ADS8371IBPFBR | 16BIT 750KHZ UNIPOLAR INPUT, MICRO POWER SAMPLING ANALOG TO DIGITAL CONVERTER WITH PARALLEL INTERFACE |
| ADS8371IBPFBT | 16BIT 750KHZ UNIPOLAR INPUT, MICRO POWER SAMPLING ANALOG TO DIGITAL CONVERTER WITH PARALLEL INTERFACE |
| ADS8371I | 16BIT 750KHZ UNIPOLAR INPUT, MICRO POWER SAMPLING ANALOG TO DIGITAL CONVERTER WITH PARALLEL INTERFACE |
| ADS8371IPFBR | 16BIT 750KHZ UNIPOLAR INPUT, MICRO POWER SAMPLING ANALOG TO DIGITAL CONVERTER WITH PARALLEL INTERFACE |
| ADS8371IPFBT | 16BIT 750KHZ UNIPOLAR INPUT, MICRO POWER SAMPLING ANALOG TO DIGITAL CONVERTER WITH PARALLEL INTERFACE |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADS8371IBPFBR | 功能描述:模數(shù)轉換器 - ADC 16-Bit 750kHz Unipol Inp MicroPwr Smplng RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| ADS8371IBPFBRG4 | 功能描述:模數(shù)轉換器 - ADC 16-Bit 750kHz Unipol Inp MicroPwr Smplng RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| ADS8371IBPFBT | 功能描述:模數(shù)轉換器 - ADC 16-Bit 750kHz Unipol Inp MicroPwr Smplng RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| ADS8371IBPFBTG4 | 功能描述:模數(shù)轉換器 - ADC 16-Bit 750kHz Unipol Inp MicroPwr Smplng RoHS:否 制造商:Texas Instruments 通道數(shù)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 |
| ADS8371IPFBR | 功能描述:模數(shù)轉換器 - ADC 16-Bit 750kHz Unipol Inp MicroPwr Smplng RoHS:否 制造商:Texas Instruments 通道數(shù)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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