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參數(shù)資料
| 型號(hào)： | MAX195BMDE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | 16-Bit, 85ksps ADC with 10レA Shutdown |
| 中文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP16 |
| 封裝： | 0.300 INCH, SIDEBRAZED, CERAMIC, DIP-16 |
| 文件頁數(shù)： | 6/28頁 |
| 文件大小： | 311K |
| 代理商： | MAX195BMDE |
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M
Calibration
In an ideal DAC, each of the capacitors associated with
the data bits would be exactly twice the value of the
next smaller capacitor. In practice, this results in a
range of values too wide to be realized in an economi-
cally feasible size. The capacitor array actually consists
of two arrays, which are capacitively coupled to reduce
the LSB array’s effective value. The capacitors in the
MSB array are production trimmed to reduce errors.
Small variations in the LSB capacitors contribute
insignificant errors to the 16-bit result.
Unfortunately, trimming alone does not yield 16-bit per-
formance or compensate for changes in performance
due to changes in temperature, supply voltage, and
other parameters. For this reason, the MAX195 includes
a calibration DAC for each capacitor in the MSB array.
These DACs are capacitively coupled to the main DAC
output and offset the main DAC’s output according to
the value on their digital inputs. During calibration, the
correct digital code to compensate for the error in each
MSB capacitor is determined and stored. Thereafter,
the stored code is input to the appropriate calibration
DAC whenever the corresponding bit in the main DAC
is high, compensating for errors in the associated
capacitor.
The MAX195 calibrates automatically on power-up. To
reduce the effects of noise, each calibration experiment
is performed many times and the results are averaged.
Calibration requires about 14,000 clock cycles, or
8.2ms at the highest clock (CLK) speed (1.7MHz). In
addition to the power-up calibration, bringing
RESET
low halts MAX195 operation, and bringing it high again
initiates a calibration (Figure 2).
16-Bit, 85ksps ADC with 10μA S hutdown
6
_______________________________________________________________________________________
MSB
AIN
REF
AGND
DUMMY
LSB
32,768C
16,384C
4C
2C
C
C
EOC
CLK
RESET
CALIBRATION
BEGINS
CALIBRATION
ENDS
MAX195
OPERATION HALTS
t
CAL
t
RCS
t
RCH
Figure 1. Capacitor DAC Functional Diagram
Figure 2. Initiating Calibration
相關(guān)PDF資料 |
PDF描述 |
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| MAX196-MAX198 | Multirange, Single %V, 12-Bit DAS with 12-Bit Bus Interface |
| MAX196AMYI | Circular Connector; No. of Contacts:18; Series:MS27505; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:15-18 RoHS Compliant: No |
| MAX198AMYI | Circular Connector; No. of Contacts:18; Series:MS27505; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle RoHS Compliant: No |
| MAX198AEAI | Multirange, Single %V, 12-Bit DAS with 12-Bit Bus Interface |
| MAX198BENI | Multirange, Single %V, 12-Bit DAS with 12-Bit Bus Interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX195EVC16-DIP | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Programmers, Development Systems 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 |
| MAX195EVKIT-DIP | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 Programmers, Development Systems RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| MAX1960EEP | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1960EEP+ | 功能描述:DC/DC 開關(guān)控制器 1MHz PWM Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1960EEP+T | 功能描述:DC/DC 開關(guān)控制器 1MHz PWM Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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