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參數(shù)資料
| 型號(hào)： | MAX1138 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 串行ADC |
| 英文描述： | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-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線串行接口、10位ADC |
| 文件頁(yè)數(shù)： | 12/22頁(yè) |
| 文件大?。?/td> | 471K |
| 代理商： | MAX1138 |
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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 MAX1136
–
MAX1139 continuous-
ly wait for a START condition followed by their slave
address. When the MAX1136
–
MAX1139 recognize their
slave address, they are ready to accept or send data.
The slave address has been factory programmed and is
always 0110100 for the MAX1136/MAX1137, and
0110101 for MAX1138/MAX1139 (Figure 7). The least sig-
nificant bit (LSB) of the address byte (R/
W
) determines
whether the master is writing to or reading from the
MAX1136
–
MAX1139 (R/
W
= 0 selects a write condition,
R/
W
= 1 selects a read condition). After receiving the
address, the MAX1136
–
MAX1139 (slave) issues an
acknowledge by pulling SDA low for one clock cycle.
Bus Timing
At power-up, the MAX1136
–
MAX1139 bus timing is set
for fast mode (F/S-mode) which allows conversion rates
up to 22.2ksps. The MAX1136
–
MAX1139 must operate
in high-speed mode (HS-mode) to achieve conversion
rates up to 94.4ksps. Figure 1 shows the bus timing for
the MAX1136
–
MAX1139
’
s 2-wire interface.
HS-Mode
At power-up, the MAX1136
–
MAX1139 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
MAX1136
–
MAX1139 issue a not-acknowledge allowing
SDA to be pulled high for one clock cycle (Figure 8).
After the not-acknowledge, the MAX1136
–
MAX1139 are
in HS-mode. The bus master must then send a repeated
START followed by a slave address to initiate HS-mode
communication. If the master generates a STOP condi-
tion the MAX1136
–
MAX1139 returns to F/S-mode.
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel, 2-Wire Serial 10-Bit ADCs
12
______________________________________________________________________________________
0
1
1
1
0
0
0
R/W
A
SLAVE ADDRESS
MAX1136/MAX1137
S
SCL
SDA
1
2
3
4
5
6
7
8
9
DEVICE
SLAVE ADDRESS
0110100
0110101
MAX1136/MAX1137
MAX1138/MAX1139
Figure 7. MAX1136/MAX1137 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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1139 | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs |
| MAX1138EEE | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs |
| MAX1139EEE | Low-Voltage Adjustable Precision Shunt Regulator 3-SOT-89 -40 to 85 |
| MAX1136EUA | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs |
| MAX1137EUA | 2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1138EEE | 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1138EEE+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 12Ch 94.4ksps 5.5V 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1138EEE+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 12Ch 94.4ksps 5.5V 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1138EEE-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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1138KEEE | 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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