Low-Power, 1-/2-Channel, I2C, 12-Bit ADCs in Ultra-Tiny 1.9mm " />
參數(shù)資料
型號(hào)： MAX11644EUA+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 9/22頁(yè)
文件大?。?/td> 0K
描述： IC ADC 12BIT I2C/SRL 1CH 8UMAX
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 50
位數(shù)： 12
采樣率（每秒）： 94.4k
數(shù)據(jù)接口： I²C，串行
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 362mW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 8-uMAX
包裝： 管件
輸入數(shù)目和類型： 2 個(gè)單端，單極；2 個(gè)單端，雙極；1 個(gè)差分，單極；1 個(gè)差分，雙極
MAX11644/MAX11645
Low-Power, 1-/2-Channel, I2C, 12-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
______________________________________________________________________________________
17
External Clock
When configured for external clock mode (CLK = 1),
the MAX11644/MAX11645 use the SCL as the conver-
sion clock. In external clock mode, the MAX11644/
MAX11645 begin tracking the analog input on the ninth
rising clock edge of a valid slave address byte. Two
SCL clock cycles later, the analog signal is acquired
and the conversion begins. Unlike the internal clock
mode, converted data is available immediately after the
first four empty high bits. The device continuously con-
verts input channels dictated by the scan mode until
given a not-acknowledge. There is no need to read-
dress the device with a read command to obtain new
conversion results (see Figure 11).
The conversion must complete in 1ms, or droop on the
track-and-hold capacitor degrades conversion results.
Use internal clock mode if the SCL clock period
exceeds 60μs.
The MAX11644/MAX11645 must operate in external
clock mode for conversion rates from 40ksps to
94.4ksps. Below 40ksps, internal clock mode is recom-
mended due to much smaller power consumption.
Scan Mode
SCAN0 and SCAN1 of the configuration byte set the
scan mode configuration. Table 5 shows the scanning
configurations. The scanned results are written to memo-
ry in the same order as the conversion. Read the results
from memory in the order they were converted. Each
result needs a 2-byte transmission; the first byte begins
with 4 empty bits, during which SDA is left high. Each
byte has to be acknowledged by the master or the mem-
ory transmission is terminated. It is not possible to read
the memory independently of conversion.
SLAVE ADDRESS
tCONV1
tACQ1
tACQ2
tCONVN
tACQN
tCONV
tACQ
NUMBER OF BITS
1
8
A
1
S
1
A
71 1
R
S
1
71 1
R
P OR Sr
1
8
A
1
A
8
A
8
B) SCAN MODE CONVERSIONS WITH EXTERNAL CLOCK
1
SLAVE ADDRESS
P OR Sr
RESULT (8 LSBs)
8
A
1
RESULT (4 MSBs)
A) SINGLE CONVERSION WITH EXTERNAL CLOCK
SLAVE TO MASTER
MASTER TO SLAVE
RESULT 1 (4 MSBs)
RESULT 2 (8 LSBs)
RESULT N (8 LSBs)
A
1
8
RESULT N (4 MSBs)
A
Figure 11. External Clock Mode Read Cycle
SCAN1
SCAN0
SCANNING CONFIGURATION
0
Scans up from AIN0 to the input selected by CS0.
0
1
Converts the input selected by CS0 eight times (see Tables 3 and 4).*
1
0
Reserved. Do not use.
1
Converts the input selected by CS0.*
*
When operating in external clock mode, there is no difference between SCAN[1:0] = 01 and SCAN[1:0] = 11, and converting occurs
perpetually until not-acknowledge occurs.
Table 5. Scanning Configuration
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX11644EUA+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 2Ch 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
MAX11644EUA+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 2Ch 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
MAX11645EUA+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 2Ch 94.4ksps 3.6V 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
MAX11645EUA+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 2Ch 94.4ksps 3.6V 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
MAX11645EWC+ 制造商:Maxim Integrated Products 功能描述:
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