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參數(shù)資料
| 型號： | ADS5220 |
| 英文描述： | 12-Bit, 40MSPS Sampling, +3.3V ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 12位，40MSPS采樣，3.3V的模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 433K |
| 代理商： | ADS5220 |
ADS5220
SBAS261A
9
www.ti.com
OUTPUT NOISE HISTOGRAM (DC Output)
C
Code
60000
50000
40000
30000
20000
10000
0
N
–
2
N
–
1
N
N + 1
N + 2
TYPICAL CHARACTERISTICS: AV
DD
= 3.3V
(Cont.)
T
=
–
40
°
C, T
= +85
°
C, typical values are at T
= +25
°
C, sampling rate = 40MSPS, 50% clock duty cycle, AV
DD
= 3.3V, DV
DD
= 3.3V, VDRV = 2.5V,
–
1dBFS,
DCA off, internal reference voltage, and 2V
PP
differential input, unless otherwise noted.
APPLICATION INFORMATION
THEORY OF OPERATION
The ADS5220 is a 12-bit, 40MSPS, CMOS ADC designed
with a fully differential pipeline architecture. The pipeline
consists of three sections: a 3-bit quantizer, eight middle
stages with a 1.5-bit quantizer for each stage, and a 4-bit
flash. The output of each pipeline stage is processed and
formed into 12-bit data in the digital error correction logic
section to ensure good differential linearity of the ADC. The
converter includes a high bandwidth track-and-hold amplifier
in the input stage as shown in Figure 1. The rising edge of
the input clock initiates the conversion process. Once the
signal is captured by the input track-and-hold, the bits are
sequentially encoded starting with the Most Significant Bit
(MSB). This process results in a data latency of 5 clock
cycles. The ADS5220 includes a high accuracy internal
reference and also allows the use of an external reference.
The input full-scale range is up to 2V
PP
and is selectable
based on the reference voltage setting. For normal opera-
tion, both analog inputs (IN,
IN
) require an external common-
mode voltage as a bias. The output data of the ADS5220 is
available as a 12-bit parallel word, either coded in a Straight
Offset Binary or Binary Two
’
s Complement format. The
ADS5220 includes an on-chip duty-cycle adjust (DCA)
circuit, controlled through the state of the Mode Selectpin
T&H
C
IN
V
BIAS
V
BIAS
C
IN
S
1
S
2
S
3
S
4
S
6
S
5
IN
IN
Tracking Phase: S
1
, S
2
, S
3
, S
4
closed; S
5
, S
6
open
Hold Phase: S
1
, S
2
, S
3
, S
4
open; S
5
, S
6
closed
FIGURE 1. Simplified Circuit of Input Track-and-Hold Amplifier
of ADS5220.
(3). When activated, this duty-cycle adjust circuit can accom-
modate for an incoming clock duty-cycle range of 35% to
65%, and re-time it to a 50% duty-cycle, which allows for
optimum internal clock timing. The ADS5220 has low power
dissipation in normal mode and has two power-down modes.
The device operates from a single +3.3V power supply and
has a separate digital output driver supply pin.
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| ADS5220IPFBR | 12-Bit, 40MSPS Sampling, +3.3V ANALOG-TO-DIGITAL CONVERTER |
| ADS5220IRGZR | 12-Bit, 40MSPS Sampling, +3.3V ANALOG-TO-DIGITAL CONVERTER |
| ADS5220PFBR | 12-Bit, 40MSPS Sampling, +3.3V ANALOG-TO-DIGITAL CONVERTER |
| ADS5220PFBT | 12-Bit, 40MSPS Sampling, +3.3V ANALOG-TO-DIGITAL CONVERTER |
| ADS5220RGZ | 12-Bit, 40MSPS Sampling, +3.3V ANALOG-TO-DIGITAL CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS5220EVM | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS5120 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| ADS5220IPFBR | 制造商:BB 制造商全稱:BB 功能描述:12-Bit, 40MSPS Sampling, +3.3V ANALOG-TO-DIGITAL CONVERTER |
| ADS5220IRGZR | 制造商:BB 制造商全稱:BB 功能描述:12-Bit, 40MSPS Sampling, +3.3V ANALOG-TO-DIGITAL CONVERTER |
| ADS5220PFBR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-bit 40MSPS +3.3V 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS5220PFBRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-bit 40MSPS +3.3V 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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