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参数资料
| 型号： | MAX1270BCAI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/20页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12-BIT MULTIRANGE 28-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 46 |
| 类型： | 数据采集系统（DAS），ADC |
| 分辨率（位）： | 12 b |
| 采样率（每秒）： | 110k |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 电压电源： | 单电源 |
| 电源电压： | 4.75 V ~ 5.25 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： | 管件 |
| 产品目录页面： | 1396 (CN2011-ZH PDF) |
MAX1270/MAX1271
Multirange, +5V, 8-Channel,
Serial 12-Bit ADCs
10
______________________________________________________________________________________
Input Bandwidth
The ADC’s input small-signal bandwidth depends on the
selected input range and varies from 1.5MHz to 5MHz
(see Electrical Characteristics). The MAX1270B/
MAX1271B maximum sampling rate is 110ksps (100ksps
for the MAX1270A/MAX1271A). By using undersampling
techniques, it is possible to digitize high-speed transient
events and measure periodic signals with bandwidths
exceeding the ADC’s sampling rate.
To avoid high-frequency signals being aliased into the
frequency band of interest, anti-aliasing filtering is rec-
ommended.
Input Range and Protection
The MAX1270/MAX1271 have software-selectable input
ranges. Each analog input channel can be indepen-
dently programmed to one of four ranges by setting the
appropriate control bits (RNG, BIP) in the control byte
(Table 1). The MAX1270 has selectable input ranges
extending to ±10V (±VREF x 2.441), while the MAX1271
has selectable input ranges extending to ±VREF. Figure
4 shows the equivalent input circuit.
A resistor network on each analog input provides
±16.5V fault protection for all channels. Whether or not
the channel is on, this circuit limits the current going
into or out of the pin to less than 2mA. This provides an
added layer of protection when momentary overvolt-
ages occur at the selected input channel, when a neg-
ative signal is applied to the input, and when the device
is configured for unipolar mode. The overvoltage pro-
tection is active even if the device is in power-down
mode or if VDD = 0.
Digital Interface
The MAX1270/MAX1271 feature a serial interface that is
fully compatible with SPI/QSPI and MICROWIRE devices.
For SPI/QSPI, set CPOL = 0, CPHA = 0 in the SPI control
registers of the microcontroller. Figure 5 shows detailed
serial-interface timing information. See Table 1 for details
on programming the input control byte.
tCSH
tCSS
tCL
tDS
tDH
tDV
tCH
tDO
tTR
tCSH
CS
SCLK
DIN
DOUT
Figure 5. Detailed Serial-Interface Timing
R3
5.12k
R2
R1
CH_
S1
S2
S3
S4
BIPOLAR
UNIPOLAR
VOLTAGE
REFERENCE
T/H
OUT
HOLD
TRACK
HOLD
OFF
ON
CHOLD
S1 = BIPOLAR/UNIPOLAR SWITCH
S2 = INPUT MUX SWITCH
S3, S4 = T/H SWITCH
R1 = 12.5k
(MAX1270)
or 5.12k
(MAX1271)
R2 = 8.67k
(MAX1270)
or
∞ (MAX1271)
Figure 4. Equivalent Input Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1270BCAI+ | 功能描述:模数转换器 - ADC 12-Bit 8Ch 110ksps 4.18V Precision 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 |
| MAX1270BCAI+ | 制造商:Maxim Integrated Products 功能描述:IC ((NW)) |
| MAX1270BCAI+T | 功能描述:模数转换器 - ADC 12-Bit 8Ch 110ksps 4.18V Precision 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 |
| MAX1270BCAI-T | 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 |
| MAX1270BCNG | 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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