參數(shù)資料
型號: MAX1401EAI+
廠商: Maxim Integrated Products
文件頁數(shù): 28/36頁
文件大?。?/td> 0K
描述: IC ADC 18BIT LP 28-SSOP
產(chǎn)品培訓模塊: MAX11200 ADC
Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 46
位數(shù): 18
采樣率(每秒): 480
數(shù)據(jù)接口: QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 750µW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
供應商設(shè)備封裝: 28-SSOP
包裝: 管件
輸入數(shù)目和類型: 3 個差分,單極;3 個差分,雙極;5 個偽差分,單極;5 個偽差分,雙極
產(chǎn)品目錄頁面: 1396 (CN2011-ZH PDF)
Loop-Powered, 4–20mA Transmitters
Low power, single-supply operation, and easy interfac-
ing with optocouplers make the MAX1401 ideal for
loop-powered 4–20mA transmitters. Loop-powered
transmitters draw their power from the 4–20mA loop,
limiting the transmitter circuitry to a current budget of
4mA. Tolerances in the loop further limit this current
budget to 3.5mA. Since the MAX1401 consumes only
250A, a total of 3.25mA remains to power the remain-
ing transmitter circuitry. Figure 16 shows a block dia-
gram for a loop-powered 4–20mA transmitter.
Power Supplies
No specific power sequence is required for the
MAX1401; either the V+ or the VDD supply can come
up first. While the latchup performance of the MAX1401
is good, to avoid latchup it is important that power be
applied to the MAX1401 before the analog input signals
(AIN_) or the CLKIN inputs. If this is not possible, then
the current flow into any of these pins should be limited
to 50mA. If separate supplies are used for the
MAX1401 and the system digital circuitry, then the
MAX1401 should be powered up first.
MAX1401
+3V, 18-Bit, Low-Power, Multichannel,
Oversampling (Sigma-Delta) ADC
34
______________________________________________________________________________________
DAC
RGAIN
ROFST
RX
VIN+
VIN-
RSENSE
4–20mA LOOP
INTERFACE
RFDBK
RY
CC
ISOLATION
BARRIER
V+
GND
V+
4
SPI
4
SPI
3
SPI
GND
SENSOR
VOLTAGE
REGULATOR
P/C
MAX1401
Figure 16. 4–20mA Transmitter
C
+3V
+1.25V
REFIN+
REFIN-
AGND
DGND
R
THERMOCOUPLE
JUNCTION
SWITCHING
NETWORK
PGA
BUFFER
AIN1
AIN2
MAX1401
Figure 15. Thermocouple Application with MAX1401
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1401EAI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 5Ch 4.8ksps 1.25V Precision 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1401EAI+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 5Ch 4.8ksps 1.25V Precision 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1401EAI-T 功能描述:模數(shù)轉(zhuǎn)換器 - 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1402CAI 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40
MAX1402CAI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 5Ch 4.8ksps 2.5V Precision 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32