- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9447 > MAX11358BETL+ (Maxim Integrated Products)IC DAS SYSTEM 16BIT 40-TQFN PDF資料下載
參數(shù)資料
| 型號： | MAX11358BETL+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 27/71頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS SYSTEM 16BIT 40-TQFN |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS） |
| 分辨率（位）： | 16 b |
| 采樣率（每秒）： | 477 |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 電壓電源： | 模擬和數(shù)字 |
| 電源電壓： | 1.8 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 40-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 40-TQFN-EP（6x6） |
| 包裝： | 管件 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當(dāng)前第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁
MAX1358B
16-Bit, Data-Acquisition System with ADC, DACs,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
______________________________________________________________________________________
33
The temperature equations for the two-current and four-
current methods are as follows:
Two-current method:
T = q(VBE2 - VBE1)/(n k ln(VR2/VR1))
Four-current method:
T = q(VBE2 + VBE3 - VBE1 - VBE4)/(n k ln((VR2 x
VR3)/(VR1 x VR4))
where T is the temperature in degrees Kelvin, VBEX is
the base to emitter voltage at current X, VRX is the volt-
age across the current-sensing resistor at current X, q
is the charge on an electron, k is Boltzmann’s constant,
and n is the ideality factor for the diode. From a practi-
cal standpoint, it is easiest to combine all the constants
into one constant that also includes the voltage resolu-
tion of the ADC in unipolar mode. This requires intro-
ducing the term VREF, which is the reference voltage of
the ADC. An N prefix on a term indicates that it is the
integer value read directly from the ADC.
Two-current method:
T = 0.1771 x VREF(NVBE2 - NVBE1)/ln(NVR2/NVR1)
Four-current method:
T = 0.1771 x VREF((NVBE2 + NVBE3 - NVBE1 -
NVBE4)/ln(NVR2 xNVR3/NVR1/NVR4)
The natural log function (ln) is eliminated from the cal-
culation by using an approximation. Due to the small
part-to-part variation in current ratios, this approxima-
tion is extremely accurate.
Two-current method without an ln function:
T = 0.1771 x VREF(NVBE2 – NVBE1)/(2.7081 +
2_(NVR2/NVR1 - 15)/(NVR2/NVR1 + 15)
Four-current method without an ln function:
T = 0.1771 x VREF(NVBE2 + NVBE3 - NVBE1 -
NVBE4)/(2.0794 + 2(NVR2 x NVR3/NVR1/NVR4 - 8)/
(NVR2 x NVR3/NVR1/NVR4 + 8)
q = electron charge = 1.60219 x 10-19 coulombs
n = diode ideality = 1.000 (typ)
k = Boltzmann's constant = 1.3807 x 10-23 Joules/Kelvin
I1 = Nominal current (4A)
I2 = Nominal current ng (60A)
I3 = Nominal current (64A)
I4 = Nominal current (120A)
To convert the measured temperature in Kelvin to
degrees Celsius, the following formula is used:
°C = K - 273.15
For the external temperature measurement, a transistor
such as the 2N3904 is recommended.
Voltage Reference and Buffer
An internal 1.25V bandgap reference has a buffer with
a selectable 1.0V/V, 1.638V/V, or 2.0V/V gain, result-
ing in nominally 1.25V, 2.048V, or 2.5V reference volt-
age at REF. The ADC and DACs use this reference
voltage. The state of the internal voltage reference
output buffer at POR is disabled so it can be driven, at
REF, with an external reference between AGND and
AVDD. The MAX1358B reference has an initial toler-
ance of ±1%. Program the reference buffer through
the serial interface. Bypass REF with a 4.7F capaci-
tor to AGND.
Uncommitted Operational
Amplifiers (Op Amps)
The MAX1358B includes one op amp. The op amp fea-
tures rail-to-rail outputs, near rail-to-rail inputs, and has
an 80kHz (1nF load) input bandwidth. The DACA_OP
(DACB_OP) register controls the power state of the op
amps. When powered down, the outputs of the op
amps is high impedance.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MS3451L12S-4P | CONN RCPT 1POS CBL MNT W/PINS |
| M83723/87R1415N | CONN PLUG 15POS STRAIGHT W/PINS |
| MS3456W20-4P | CONN PLUG 4POS STRAIGHT W/PINS |
| VE-B53-IU-F1 | CONVERTER MOD DC/DC 24V 200W |
| VI-BT3-MX-B1 | CONVERTER MOD DC/DC 24V 75W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX11358BETL+ | 功能描述:ADC / DAC多通道 Integrated Circuits (ICs) Analog to Digital Converters - Special Purpose - IC DAS SYSTEM 16BIT 40-TQFN RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX11358BETL+T | 功能描述:ADC / DAC多通道 Integrated Circuits (ICs) Analog to Digital Converters - Special Purpose - IC DAS SYSTEM 16BIT 40-TQFN RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX11359A | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:16-Bit Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor |
| MAX11359A_12 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:16-Bit Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor |
| MAX11359ACTL+ | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:16-Bit Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。