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參數(shù)資料
| 型號： | MAX1202ACAP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | 5v, 8-cHANNEL, sERIAL, 12-bIT adcS WITH 3v dIGITAL iNTERFACE |
| 中文描述： | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| 封裝： | 5.30 MM, 0.65 MM PITCH, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 17/24頁 |
| 文件大小： | 309K |
| 代理商： | MAX1202ACAP |
M
5V, 8-Channel, S erial, 12-Bit ADCs
with 3V Digital Interfac e
______________________________________________________________________________________
17
Figure 11a. External Clock Mode, 15 Clocks/Conversion Timing
Figure 11b. External Clock Mode, 16 Clocks/Conversion Timing
Hardware Power-Down
The
SHDN
pin places the converter into full power-down
mode. Unlike the software power-down modes, conver-
sion is not completed; it stops coincidentally with
SHDN
being brought low. There is no power-up delay if an
external reference, which is not shut down, is used.
SHDN
also selects internal or external reference com-
pensation (Table 7).
Power-Down S equenc ing
The MAX1202/MAX1203’s automatic power-down
modes can save considerable power when operating
at less than maximum sample rates. The following sec-
tions discuss the various power-down sequences.
Lowest Power at up to
500 Conversions per Channel per Second
Figure 14a depicts MAX1202 power consumption for one
or eight channel conversions using full power-down
mode and internal reference compensation. A 0.01μF
bypass capacitor at REFADJ forms an RC filter with the
internal 20k
reference resistor, with a 0.2ms time con-
stant. To achieve full 12-bit accuracy, 10 time constants
(or 2ms in this example) are required for the reference
buffer to settle. When exiting FULLPD, waiting this 2ms in
FASTPD mode (instead of just exiting FULLPD mode and
returning to normal operating mode) reduces power con-
sumption by a factor of 10 or more (Figure 13).
Lowest Power at Higher Throughputs
Figure 14b shows power consumption with external-
reference compensation in fast power-down, with one
and eight channels converted. The external 4.7μF com-
pensation requires a 50μs wait after power-up. This cir-
cuit combines fast multichannel conversion with the
lowest power consumption possible. Full power-down
mode can increase power savings in applications where
the MAX1202/MAX1203 are inactive for long periods of
time, but where intermittent bursts of high-speed conver-
sion are required.
SCLK
DIN
DOUT
CS
S
CONTROL BYTE 0
CONTROL BYTE 1
S
CONVERSION RESULT 0
CONVERSION RESULT 1
SSTRB
CONTROL BYTE 2
S
1
8
1
8
1
B4
B5
B6
B7
B8
B9
B10
B11
B3
B2
B1 B0
B4
B5
B6
B7
B8
B9
B10
B11
B3 B2
B1
B0
CS
SCLK
DIN
DOUT
S
CONTROL BYTE 0
CONTROL BYTE 1
S
CONVERSION RESULT 0
CONVERSION RESULT 1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B5
B6
B7
B8
B9
B10
B11
B1 B0
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1202ACAP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 133ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1202ACAP+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 133ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1202ACAP-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 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1202ACPP | 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 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1202ACPP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 133ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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