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参数资料
| 型号： | MAX1238MEEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/22页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT SERIAL 16-QSOP |
| 标准包装： | 2,500 |
| 位数： | 12 |
| 采样率（每秒）： | 94.4k |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 666.7mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 12 个单端，单极；12 个单端，双极；6 个差分，单极；6 个差分，双极 |
MAX1236–MAX1239
Slave Address
A bus master initiates communication with a slave device
by issuing a START condition followed by a slave
address. When idle, the MAX1236–MAX1239 continu-
ously wait for a START condition followed by their slave
address. When the MAX1236–MAX1239 recognize their
slave address, they are ready to accept or send data.
Please refer to the table in the ordering information sec-
tion for the factory programmed slave address of the
selected device. The least significant bit (LSB) of the
address byte (R/W) determines whether the master is
writing to or reading from the MAX1236–MAX1239
(R/W = 0 selects a write condition, R/W = 1 selects a
read condition). After receiving the address, the
MAX1236–MAX1239 (slave) issues an acknowledge by
pulling SDA low for one clock cycle.
Bus Timing
At power-up, the MAX1236–MAX1239 bus timing is set
for fast-mode (F/S-mode), which allows conversion rates
up to 22.2ksps. The MAX1236–MAX1239 must operate
in high-speed mode (HS-mode) to achieve conversion
rates up to 94.4ksps. Figure 1 shows the bus timing for
the MAX1236–MAX1239’s 2-wire interface.
HS-Mode
At power-up, the MAX1236–MAX1239 bus timing is set
for F/S-mode. The bus master selects HS-mode by
addressing all devices on the bus with the HS-mode
master code 0000 1XXX (X = don’t care). After success-
fully receiving the HS-mode master code, the MAX1236–
MAX1239 issue a not-acknowledge, allowing SDA to be
pulled high for one clock cycle (Figure 8). After the not-
acknowledge, the MAX1236–MAX1239 are in HS-mode.
The bus master must then send a repeated START fol-
lowed by a slave address to initiate HS-mode communi-
cation. If the master generates a STOP condition, the
MAX1236–MAX1239 return to F/S-mode.
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial, 12-Bit ADCs
12
______________________________________________________________________________________
01
1
0
R/W
A
SLAVE ADDRESS
S
SCL
SDA
1
234
567
8
9
MAX1236/MAX1237
SEE ORDERING INFORMATION FOR SLAVE ADDRESS OPTIONS AND DETAILS.
Figure 7. MAX1236/MAX1237 Slave Address Byte
000
1
0X
X
A
HS-MODE MASTER CODE
SCL
SDA
S
Sr
F/S-MODE
HS-MODE
Figure 8. F/S-Mode to HS-Mode Transfer
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1239EEE | 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 |
| MAX1239EEE/GH9 | 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 |
| MAX1239EEE/GH9-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 |
| MAX1239EEE+ | 功能描述:模数转换器 - ADC 12-Bit 12Ch 94.4ksps 3.6V 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 |
| MAX1239EEE+ | 制造商:Maxim Integrated Products 功能描述:CONVERTOR AD ((NW)) |
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