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参数资料
| 型号： | MAX127BCAI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC DAS 12BIT 2-WIRE 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）： | 8k |
| 数据接口： | I²C，串行 |
| 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： | 1393 (CN2011-ZH PDF) |
MAX127/MAX128
Start a Conversion (Write Cycle)
A conversion cycle begins with the master issuing a
START condition followed by seven address bits
(Figure 3) and a write bit (R/W = 0). Once the eighth bit
has been received and the address matches, the
MAX127/MAX128 (the slave) issues an acknowledge
by pulling SDA low for one clock cycle (A = 0). The
master then writes the input control byte to the slave
(Figure 8). After this byte of data, the slave issues
another acknowledge, pulling SDA low for one clock
cycle. The master ends the write cycle by issuing a
STOP condition (Figure 6).
When the write bit is set (R/W = 0), acquisition starts as
soon as Bit 2 (BIP) of the input control-byte has been
latched and ends when a STOP condition has been
issued. Conversion starts immediately after acquisition.
The MAX127/MAX128’s internal conversion clock fre-
quency is 1.56MHz, resulting in a typical conversion
time of 7.7s. Figure 9 shows a complete write cycle.
Read a Conversion (Read Cycle)
Once a conversion starts, the master does not need to
wait for the conversion to end before attempting to read
the data from the slave. Data access begins with the
master issuing a START condition followed by a 7-bit
address (Figure 3) and a read bit (R/W = 1). Once the
eighth bit has been received and the address matches,
the slave issues an acknowledge by pulling low on SDA
for one clock cycle (A = 0) followed by the first byte of
serial data (D11–D4, MSB first). After the first byte has
been issued by the slave, it releases the bus for the
master to issue an acknowledge (A = 0). After receiv-
ing the acknowledge, the slave issues the second byte
(D3–D0 and four zeros) followed by a NOT acknowl-
edge (A = 1) from the master to indicate that the last
data byte has been received. Finally, the master issues
a STOP condition (P), ending the read cycle (Figure 7).
Multirange, +5V, 12-Bit DAS with
2-Wire Serial Interface
12
______________________________________________________________________________________
LSB
MSB
SDA
SCL
START SEL2
SEL1 SEL0
RNG
BIP
PD1
PD0
ACK
START:
FIRST LOGIC “1” RECEIVED AFTER ACKNOWLEDGE OF A WRITE.
ACK:
ACKNOWLEDGE BIT. THE MAX127/MAX128 PULL SDA LOW DURING THE
9TH CLOCK PULSE.
Figure 8. Command Byte
Figure 9. Complete 2-Wire Serial Write Transmission
START
CONDITION
STOP
CONDITION
CONTROL BYTE
SLAVE ADDRESS BYTE
SCL
A/D STATE
SDA
MSB
LSB
W
1
2
7
8
9
10
11
15
16
17
18
BIP
S
1
0
PD1
PD0
A
ACQUISITION
CONVERSION
MASTER TO SLAVE
SLAVE TO MASTER
NO. OF BITS
S SLAVE ADDRESS W A CONTROL-BYTE A P
1
7
1 1
8
1 1
START CONDITION
WRITE
ACKNOWLEDGE
STOP CONDITION
MASTER TO SLAVE
SLAVE TO MASTER
NO. OF BITS
S SLAVE ADDRESS R A DATA-BYTE A
1
7
1 1
8
1
DATA-BYTE A P
8
1 1
START CONDITION
READ
NOT ACKNOWLEDGE
ACKNOWLEDGE
STOP CONDITION
Figure 6. Write Cycle
Figure 7. Read Cycle
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX127BCAI+ | 功能描述:数据转换系统 12-Bit 8Ch 8ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 转换速率:0.001 MSPs 分辨率:24 bit 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX127BCAI+ | 制造商:Maxim Integrated Products 功能描述:CONVERTOR AD ((NW)) |
| MAX127BCAI+T | 功能描述:数据转换系统 12-Bit 8Ch 8ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 转换速率:0.001 MSPs 分辨率:24 bit 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX127BCAI-T | 功能描述:数据转换系统 RoHS:否 制造商:Texas Instruments 转换速率:0.001 MSPs 分辨率:24 bit 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX127BCNG | 功能描述:数据转换系统 RoHS:否 制造商:Texas Instruments 转换速率:0.001 MSPs 分辨率:24 bit 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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