參數(shù)資料
型號(hào)： ADS931E
元件分類(lèi)： ADC
英文描述： Analog-to-Digital Converter, 8-Bit
中文描述： 8位模數(shù)轉(zhuǎn)換器
文件頁(yè)數(shù)： 8/13頁(yè)
文件大?。?/td> 247K
代理商： ADS931E
ADS931
SBAS060A
8
FIGURE 1. Input Track-And-Hold Configuration with
Timing Signals.
FIGURE 2. Pipeline A/D Architecture.
THEORY OF OPERATION
The ADS931 is a high-speed sampling A/D converter that
utilizes a pipeline architecture. The fully differential topol-
ogy and digital error correction guarantee 8-bit resolution.
The track-and-hold circuit is shown in Figure 1. The switches
are controlled by an internal clock which has a non-overlap-
ping two phase signal,
φ
1 and
φ
2. At the sampling time the
input signal is sampled on the bottom plates of the input
capacitors. In the next clock phase,
φ
2, the bottom plates of
the input capacitors are connected together and the feedback
capacitors are switched to the op amp output. At this time the
charge redistributes between C
I
and C
H
, completing one
track-and-hold cycle. The differential output is a held DC
representation of the analog input at the sample time. In the
normal mode of operation, the complementary input is tied
to the common-mode voltage. In this case, the track-and-
hold circuit converts a single-ended input signal into a fully
differential signal for the quantizer. Consequently, the input
signal gets amplified by a gain or two, which improves the
signal-to-noise performance. Other parameters such as small-
signal and full-power bandwidth, and wideband noise are
also defined in this stage.
φ
1
φ
1
φ
2
φ
1
φ
1
φ
1
φ
1
φ
1
φ
2
φ
1
φ
2
φ
1
φ
2
IN
IN
(Opt.)
OUT
OUT
Op Amp
Bias
V
CM
Op Amp
Bias
V
CM
C
H
C
I
C
I
C
H
Input Clock (50%)
Internal Non-overlapping Clock
Σ
+
–
B1 (MSB)
B2
B3
B4
B5
B6
B7
B8 (LSB)
2-Bit
DAC
2-Bit
Flash
Input
T/H
Digital Delay
x2
x2
2-Bit
DAC
2-Bit
Flash
Digital Delay
2-Bit
Flash
Digital Delay
2-Bit
DAC
2-Bit
Flash
Digital Delay
x2
D
IN
STAGE 1
STAGE 2
STAGE 6
STAGE 7
Σ
+
–
Σ
+
–
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參數(shù)描述
ADS931E 制造商:Texas Instruments 功能描述:IC 8BIT ADC 30MSPS 28SSOP 制造商:Texas Instruments 功能描述:IC, 8BIT ADC, 30MSPS, 28SSOP 制造商:Texas Instruments 功能描述:IC, 8BIT ADC, 30MSPS, 28SSOP; Resolution (Bits):8bit; Sampling Rate:33MSPS; Supply Voltage Type:Single; Supply Voltage Min:2.7V; Supply Voltage Max:5.5V; Supply Current:23mA; Digital IC Case Style:SSOP; No. of Pins:28; Input Channel ;RoHS Compliant: Yes
ADS931E/1K 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 30 MSPS SE/ Diff Input 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
ADS931E/1KG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 30 MSPS SE/ Diff Input 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
ADS931EG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 30 MSPS SE/ Diff Input 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
ADS-931MC 制造商:Murata Power Solutions 功能描述:ADC Single 2-Step Flash 1Msps 16-bit Parallel 40-Pin TDIP
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