- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375266 > ADS8320 16-Bit, High-Speed, 2.7V to 5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER PDF資料下載
參數(shù)資料
| 型號： | ADS8320 |
| 英文描述： | 16-Bit, High-Speed, 2.7V to 5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 16位，高速，2.7V到5V微功耗采樣模擬到數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/13頁 |
| 文件大?。?/td> | 105K |
| 代理商： | ADS8320 |
9
ADS8320
NOISE
The noise floor of the ADS8320 itself is extremely low, as
can be seen from Figures 1 and 2, and is much lower than
competing A/D converters. It was tested by applying a low
noise DC input and a 5.0V reference to the ADS8320 and
initiating 5000 conversions. The digital output of the A/D
2
2510
3
2490
4
Code
5
6
0
0
0
0
1
FIGURE 1. Histogram of 5000 Conversions of a DC Input
at the Code Transition.
FIGURE 2. Histogram of 5000 Conversions of a DC Input
at the Code Center.
2
72
3
4864
4
Code
5
6
64
0
0
0
1
converter will vary in output code due to the internal noise
of the ADS8320. This is true for all 16-bit SAR-type A/D
converters. Using a histogram to plot the output codes, the
distribution should appear bell-shaped with the peak of the
bell curve representing the nominal code for the input value.
The
±
1
σ
,
±
2
σ
, and
±
3
σ
distributions will represent the
68.3%, 95.5%, and 99.7%, respectively, of all codes. The
transition noise can be calculated by dividing the number of
codes measured by 6 and this will yield the
±
3
σ
distribution
or 99.7% of all codes. Statistically, up to 3 codes could fall
outside the distribution when executing 1000 conversions.
The ADS8320, with < 3 output codes for the
±
3
σ
distribu-
tion, will yield a <
±
0.5LSB transition noise. Remember, to
achieve this low noise performance, the peak-to-peak noise
of the input signal and reference must be < 50
μ
V.
AVERAGING
The noise of the A/D converter can be compensated by
averaging the digital codes. By averaging conversion re-
sults, transition noise will be reduced by a factor of 1/
√
n,
where n is the number of averages. For example, averaging
4 conversion results will reduce the transition noise by 1/2
to
±
0.25 LSBs. Averaging should only be used for input
signals with frequencies near DC.
For AC signals, a digital filter can be used to low pass filter
and decimate the output codes. This works in a similar
manner to averaging; for every decimation by 2, the signal-
to-noise ratio will improve 3dB.
DIGITAL INTERFACE
SIGNAL LEVELS
The digital inputs of the ADS8320 can accommodate logic
levels up to 5.5V regardless of the value of V
CC
. Thus, the
ADS8320 can be powered at 3V and still accept inputs from
logic powered at 5V.
The CMOS digital output (D
OUT
) will swing 0V to V
CC
. If
V
CC
is 3V and this output is connected to a 5V CMOS logic
input, then that IC may require more supply current than
normal and may have a slightly longer propagation delay.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADS8320E | 16-Bit, High-Speed, 2.7V to 5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS8320EB | 16-Bit, High-Speed, 2.7V to 5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS8323 | TERMINAL |
| ADS8343 | 16-Bit, 4-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS8343E | 16-Bit, 4-Channel Serial Output Sampling ANALOG-TO-DIGITAL CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS8320E | 制造商:Rochester Electronics LLC 功能描述: |
| ADS8320E | 制造商:Texas Instruments 功能描述:16BIT ADC DUAL SMD 8320 SOIC8 |
| ADS8320E/250 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit Hi-Sp 2.7-5V MicroPwr Sampling 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS8320E/250 | 制造商:Texas Instruments 功能描述:IC 16BIT ADC 100KSPS SMD 制造商:Texas Instruments 功能描述:IC, 16BIT ADC, 100KSPS, SMD 制造商:Texas Instruments 功能描述:IC, 16BIT ADC, 100KSPS, SMD; Resolution (Bits):16bit; Sampling Rate:100kSPS; Supply Voltage Type:Single; Supply Voltage Min:2.7V; Supply Voltage Max:5.25V; Supply Current:900A; Digital IC Case Style:MSOP; No. of Pins:8; Input ;RoHS Compliant: Yes |
| ADS8320E/250G4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-Bit Hi-Sp 2.7-5V MicroPwr Sampling 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。