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參數(shù)資料
| 型號(hào)： | MAX128BENG+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS 12BIT 2-WIRE 24-DIP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 15 |
| 類型： | 數(shù)據(jù)采集系統(tǒng)（DAS），ADC |
| 分辨率（位）： | 12 b |
| 采樣率（每秒）： | 8k |
| 數(shù)據(jù)接口： | I²C，串行 |
| 電壓電源： | 單電源 |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 24-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 24-PDIP |
| 包裝： | 管件 |
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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參數(shù)描述 |
|---|---|
| MAX128BENG+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 8ksps 4.18V 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 |
| MAX1290ACEI | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) 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 |
| MAX1290ACEI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 400ksps 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 |
| MAX1290ACEI+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 400ksps 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 |
| MAX1290ACEI-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 |
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