参数资料
| 型号： | MAX1414CAI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 37/48页 |
| 文件大小： | 0K |
| 描述： | IC DAS 16BIT LP 28-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 类型： | 数据采集系统（DAS） |
| 分辨率（位）： | 16 b |
| 采样率（每秒）： | 60 |
| 数据接口： | 串行 |
| 电压电源： | 模拟和数字 |
| 电源电压： | 2.7 V ~ 3.6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
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MAX1407/MAX1408/MAX1409/MAX1414
Low-Power, 16-Bit Multichannel DAS with
Internal Reference,10-Bit DACs, and RTC
42
______________________________________________________________________________________
where NB is the decimal value of the DAC’s binary
input code. Table 12 shows digital codes (offset binary)
and corresponding output voltages for Figure 18
assuming R1 = R2.
Power Supplies
Power to the MAX1407/MAX1408/MAX1409/MAX1414
family can be supplied in a number of ways. Figures 19,
20, 21, and 22 are power-supply circuits using a step-up
converter, buck-boost converter, step-down converter,
and a direct battery, respectively. Choose the correct
power-supply circuit for your specific application.
Connect the MAX1407/MAX1408/MAX1409/MAX1414
AVDD and DVDD power supplies together. While the
latch-up performance of the MAX1407/MAX1408/
MAX1409/MAX1414 is adequate, it is important that
power is applied to the device before the analog input
signals (IN_) to avoid latch-up. If this is not possible,
limit the current flow into any of these pins to 50mA.
Electrochemical Sensor Operation
The MAX1407/MAX1408/MAX1409/MAX1414 family inter-
face with electrochemical sensors. The 10-bit DACs with
the force/sense buffers have the flexibility to connect to
many different types of sensors. Figure 23 shows how to
interface with a two electrode potentiostat. A single DAC
is required to set the bias across the sensor relative to
ground and an external precision resistor completes the
transimpedance amplifier configuration to convert the
current generated by the sensor to a voltage to be mea-
sured by the ADC. The induced error from this source is
negligible due to FB1’s extremely low input bias current.
Internally, the ADC can differentially measure directly
across the external transimpedance resistor, RF, eliminat-
ing any errors due to voltages drifting over time, tempera-
ture, or supply voltage. Figure 24 shows a two electrode
potentiostat application that is driven at the working elec-
trode and measured at the counter electrode. With this
application, the DAC connected to the working electrode
is configured in unity gain and the DAC connected to the
VV
OUT
REF
=
2
1024
1
NB
Figure 21. Power-Supply Circuit Using MAX640 Step-Down DC-DC Converter
MAX1407
MAX1408
MAX1409
MAX1414
MAX640
V+
D1
IN0
RESET
P/C
WU1
INPUT
100
F
0.1
F
0.1
F
0.1
F
R
33
F
*ONE TRANSISTOR (9V), ONE J CELL (6V), OR FOUR ALKALINE CELLS
E1*
VBAT
VDD (+3.3V)
100
H
2R
SHDN
LX
VOUT
VFB
LBI
GND
CPLL
AGND
DGND
18nF
AVDD
DVDD
VDD
VSS
Figure 22. Power-Supply Circuit Using Direct Battery Connection
MAX1407
MAX1408
MAX1409
MAX1414
RESET
P/C
WU1
INPUT
10
F
0.1
F
0.1
F
0.1
F
*ONE Li+ COIN OR TWO BUTTON CELLS
E1*
CPLL
AGND
DGND
18nF
AVDD
VBAT
DVDD
VDD
VSS
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1414EAI | 制造商:Maxim Integrated Products 功能描述:LOW-POWER, 16-BIT MULTICHANNEL DAS WITH INTER - Bulk |
| MAX1414EAI+ | 制造商:Maxim Integrated Products 功能描述:LOW-POWER 16-BIT MULTICHANNEL DAS - Rail/Tube |
| MAX1414EAI+T | 制造商:Maxim Integrated Products 功能描述:LOW-POWER 16-BIT MULTICHANNEL DAS - Tape and Reel |
| MAX1415AENE | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1415AEUE | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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