參數(shù)資料
型號： KAD5512HP-17Q48
廠商： Intersil
文件頁數(shù)： 10/34頁
文件大?。?/td> 0K
描述： IC ADC 12BIT 170MSPS SGL 48-QFN
產(chǎn)品培訓(xùn)模塊： High-Speed Analog-to-Digital Converters
標(biāo)準(zhǔn)包裝： 1
系列： FemtoCharge™
位數(shù)： 12
采樣率（每秒）： 170M
數(shù)據(jù)接口： 串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 406mW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 48-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 48-QFN（7x7）
包裝： 托盤
輸入數(shù)目和類型： 1 個差分，單極
18
FN6808.3
October 1, 2009
The calibration sequence is initiated on the rising edge of
RESETN, as shown in Figure 22. The over-range output
(OR) is set high once RESETN is pulled low, and remains in
that state until calibration is complete. The OR output returns
to normal operation at that time, so it is important that the
analog input be within the converter’s full-scale range to
observe the transition. If the input is in an over-range
condition the OR pin will stay high, and it will not be possible
to detect the end of the calibration cycle.
While RESETN is low, the output clock (CLKOUTP/CLKOUTN)
is set low. Normal operation of the output clock resumes at the
next input clock edge (CLKP/CLKN) after RESETN is
de-asserted. At 250MSPS the nominal calibration time is
200ms, while the maximum calibration time is 550ms.
User-Initiated Reset
Recalibration of the ADC can be initiated at any time by
driving the RESETN pin low for a minimum of one clock
cycle. An open-drain driver with a drive strength of less than
0.5mA is recommended, RESETN has an internal high
impedance pull-up to OVDD. As is the case during power-on
reset, the SDO, RESETN and DNC pins must be in the
proper state for the calibration to successfully execute.
The performance of the KAD5512HP changes with
variations in temperature, supply voltage or sample rate. The
extent of these changes may necessitate recalibration,
depending on system performance requirements. Best
performance will be achieved by recalibrating the ADC under
the environmental conditions at which it will operate.
A supply voltage variation of <100mV will generally result in
an SNR change of less than 0.5dBFS and SFDR change of
less than 3dBc.
In situations where the sample rate is not constant, best
results will be obtained if the device is calibrated at the
highest sample rate. Reducing the sample rate by less than
80MSPS will typically result in an SNR change of less than
0.5dBFS and an SFDR change of less than 3dBc.
Figures 23 and 24 show the effect of temperature on SNR
and SFDR performance with calibration performed at -40°C,
+25°C, and +85°C. Each plot shows the variation of
SNR/SFDR across temperature after a single calibration at
-40°C, +25°C and +85°C. Best performance is typically
achieved by calibration at the operating conditions as stated
earlier but it can be seen that performance drift with
temperature is not a very strong function of the temperature
at which the calibration is performed. Full-rated performance
will be achieved after power-up calibration regardless of the
operating conditions.
Analog Input
A single fully differential input (VINP/VINN) connects to the
sample and hold amplifier (SHA) of each unit ADC. The ideal
FIGURE 22. CALIBRATION TIMING
CLKP
CLKN
CLKOUTP
RESETN
ORP
CALIBRATION
BEGINS
CALIBRATION
COMPLETE
CALIBRATION
TIME
FIGURE 23. SNR PERFORMANCE vs TEMPERATURE
-4
-3
-2
-1
0
1
2
3
-40
-15
10
35
60
85
SNR
CHANGE
(dBfs)
CAL DONE AT
+85°C
TEMPERATURE (°C)
CAL DONE AT
-40°C
CAL DONE AT
+25°C
FIGURE 24. SFDR PERFORMANCE vs TEMPERATURE
-15
-10
-5
0
5
10
15
-40
-15
10
35
60
85
SFDR
CHANGE
(dBc)
TEMPERATURE (°C)
CAL DONE AT
-40°C
CAL DONE AT
+25°C
CAL DONE AT
+85°C
KAD5512HP
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KAD5512HP-17Q72 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-BIT 170MSPS HI PERF SINGLE ADC 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
KAD5512HP-21Q48 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-BIT 210MSPS HI PERF SINGLE ADC PROG 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
KAD5512HP-21Q72 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-BIT 210MSPS HI PERF SINGLE ADC PROG 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
KAD5512HP-25Q48 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-BIT 250MSPS HI PERF SINGLE ADC 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
KAD5512HP-25Q72 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-BIT 250MSPS HI PERF SINGLE ADC 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
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