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参数资料
| 型号： | MAX1237 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs |
| 中文描述： | 2.7V至3.6V及4.5V至5.5V、低功耗、4/12通道、2线串口12位ADC |
| 文件页数： | 12/22页 |
| 文件大小： | 407K |
| 代理商： | MAX1237 |
M
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
______________________________________________________________________________________
0
1
1
1
0
0
0
R/W
A
SLAVE ADDRESS
S
SCL
SDA
1
2
3
4
5
6
7
8
9
MAX1236/MAX1237
SEE ORDERING INFORMATION FOR SLAVE ADDRESS OPTIONS AND DETAILS.
Figure 7. MAX1236/MAX1237 Slave Address Byte
0
0
0
1
0
X
X
X
A
HS-MODE MASTER CODE
SCL
SDA
S
Sr
F/S-MODE
HS-MODE
Figure 8. F/S-Mode to HS-Mode Transfer
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1238 | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs |
| MAX1237MEUA | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs |
| MAX1236MEUA | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs |
| MAX1236LEUA | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs |
| MAX1238EEE | CAP .0012UF 100V PPS FILM ECH-S |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1237EUA | 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 |
| MAX1237EUA+ | 功能描述:模数转换器 - ADC 12-Bit 4Ch 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 |
| MAX1237EUA+C2P | 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 |
| MAX1237EUA+T | 功能描述:模数转换器 - ADC 12-Bit 4Ch 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 |
| MAX1237EUA-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 |
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