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參數(shù)資料
| 型號： | MAX1407CAI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 39/48頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS 16BIT LP 28-SSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 46 |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS） |
| 分辨率（位）： | 16 b |
| 采樣率（每秒）： | 60 |
| 數(shù)據(jù)接口： | 串行 |
| 電壓電源： | 模擬和數(shù)字 |
| 電源電壓： | 2.7 V ~ 3.6 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SSOP |
| 包裝： | 管件 |
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MAX1407/MAX1408/MAX1409/MAX1414
Low-Power, 16-Bit Multichannel DAS with
Internal Reference,10-Bit DACs, and RTC
44
______________________________________________________________________________________
maintain the reference electrode bias voltage by virtue of
the feedback path through the sensor.
Optical Reflectometry
Figure 26 illustrates the MAX1407/MAX1414 in an optical
reflectometry application. The first DAC is used with an
external transistor to set the bias current through the LED
and the second DAC is used to properly bias and convert
the photodiode current to a voltage measured by the
ADC. The low input bias current into the DAC feedback
pin (FB2) allows the measurement of very small currents.
The DACs provide the flexibility in setting an accurate
and stable LED current and adjusting the bias across the
photodiode. Set the LED bias current externally if the
MAX1409 is used in this application.
Thermistor Measurement
A thermistor connected in a half-bridge configuration
as shown in Figure 27 is used to measure temperatures
very accurately with the MAX1407/MAX1408/
MAX1409/MAX1414. The internal reference drives the
thermistor as well as the ADC, so the reference varia-
tion is cancelled out when calculating the temperature.
The only significant errors are from the RL resistor and
the thermistor itself. The ADC performs a unipolar con-
version with the PGA set to a gain of 1V/V.
Figure 27. Thermistor Application Circuit
MAX1407
MAX1408
MAX1409
MAX1414
REF
DRDY NOT AVAILABLE ON THE MAX1409
BAND
GAP
WAKE-UP
INTERRUPT
GENERATOR
REF
DRDY
INT
RL
RT
AGND
4.7
F
BUF
8:1
MUX
16b ADC
CMP
REF
IN0
8:1
MUX
Figure 28. Thermocouple Application Circuit
MAX1407
MAX1408
MAX1414
REF
C
BAND
GAP
WAKE-UP
INTERRUPT
GENERATOR
REF
DRDY
INT
R
4.7
F
BUF
8:1
MUX
16b ADC
CMP
AGND
THERMOCOUPLE
JUNCTION
IN1
IN0
IN2
8:1
MUX
CJC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1407CAI+ | 功能描述:ADC / DAC多通道 16-Bit 4Ch 60sps 1.35V Precision ADC 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 |
| MAX1407CAI+T | 功能描述:ADC / DAC多通道 16-Bit 4Ch 60sps 1.35V Precision ADC 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 |
| MAX1407CAI-T | 功能描述:ADC / DAC多通道 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 |
| MAX1407EAI+ | 制造商:Maxim Integrated Products 功能描述:LOW-POWER 16-BIT MULTICHANNEL DAS - Rail/Tube |
| MAX1407EAI+T | 制造商:Maxim Integrated Products 功能描述:LOW-POWER 16-BIT MULTICHANNEL DAS - Tape and Reel |
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