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參數資料
| 型號： | SPT7725BIQ |
| 廠商： | SIGNAL PROCESSING TECHNOLOGIES |
| 元件分類： | ADC |
| 英文描述： | 8-BIT, 300 MSPS, FLASH A/D CONVERTER |
| 中文描述： | 1-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, CQFP44 |
| 封裝： | CERQUAD-44 |
| 文件頁數： | 5/12頁 |
| 文件大?。?/td> | 134K |
| 代理商： | SPT7725BIQ |
5
8/17/01
SPT7725
Figure 1 – Typical Interface Circuit 1
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GENERAL DESCRIPTION
The SPT7725 is a fast monolithic 8-bit parallel flash A/D
converter. The nominal conversion rate is 300 MSPS and
the analog bandwidth is in excess of 200 MHz. A major ad-
vance over previous flash converters is the inclusion of
256 input preamplifiers between the reference ladder and
input comparators. (See block diagram.) This not only re-
duces clock transient kickback to the input and reference
ladder due to a low AC beta but also reduces the effect of
the dynamic state of the input signal on the latching char-
acteristics of the input comparators. The preamplifiers act
as buffers and stabilize the input capacitance so that it re-
mains constant for varying input voltages and frequencies
and, therefore, makes the part easier to drive than previ-
ous flash converters. The SPT7725 incorporates a propri-
etary decoding scheme that reduces metastable errors
(sparkle codes or
flyers) to a maximum of 1 LSB.
The SPT7725 has true differential analog and digital data
paths from the preamplifiers to the output buffers (Current
Mode Logic) for reducing potential missing codes while
rejecting common mode noise.
Signature errors are also reduced by careful layout of the
analog circuitry. Every comparator also has a clock buffer
to reduce differential delays and to improve signal-to-
noise ratio. The output drive capability of the device can
provide full ECL swings into 50
loads.
TYPICAL INTERFACE CIRCUIT
The typical interface circuit is shown in figure 1. The
SPT7725 is relatively easy to apply depending on the
accuracy needed in the intended application. Wire-wrap
may be employed with careful point-to-point ground con-
nections if desired, but to achieve the best operation, a
相關PDF資料 |
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| SPT7725 | 8-BIT, 300 MSPS, FLASH A/D CONVERTER |
| SPT7725AIG | 8-BIT, 300 MSPS, FLASH A/D CONVERTER |
| SPT7725AIJ | 8-BIT, 300 MSPS, FLASH A/D CONVERTER |
| SPT7725AIQ | 8-BIT, 300 MSPS, FLASH A/D CONVERTER |
| SPT7725BCU | 8-BIT, 300 MSPS, FLASH A/D CONVERTER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SPT7730 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-BIT, 3.0 MSPS, SERIAL OUTPUT A/D CONVERTER |
| SPT7730SCS | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-BIT, 3.0 MSPS, SERIAL OUTPUT A/D CONVERTER |
| SPT7730SCU | 制造商:CADEKA 制造商全稱:CADEKA 功能描述:8-BIT, 3.0 MSPS, SERIAL OUTPUT A/D CONVERTER |
| SPT7734 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-BIT, 40 MSPS,175 mW A/D CONVERTER |
| SPT7734SCS | 功能描述:視頻模擬/數字化轉換器集成電路 8BIT 40 MSPS SaR aDC RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉換器數量:1 ADC 輸入端數量:4 轉換速率:3 Gbps 分辨率:8 bit 結構: 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
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