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參數(shù)資料
| 型號： | MAX1284 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | ADC |
| 英文描述： | Enhanced Product 1.5 Degrees C Accurate Digital Temperature Sensor W/Spi Interface 6-SOT-23 -40 to 125 |
| 中文描述： | 400ksps/300ksps、單電源、低功耗、串行12位ADC，內(nèi)置電壓基準 |
| 文件頁數(shù)： | 13/15頁 |
| 文件大?。?/td> | 210K |
| 代理商： | MAX1284 |
M
400ksps/300ksps, Single-Supply, Low-Power,
Serial 12-Bit ADCs with Internal Reference
______________________________________________________________________________________
13
Figure 14 shows the recommended system ground con-
nections. Establish a single-point analog ground (
“
star
”
ground point) at GND, separate from the logic ground.
Connect all other analog grounds and DGND to this star
ground point for further noise reduction. No other digital
system ground should be connected to this single-point
analog ground. The ground return to the power supply for
this ground should be low impedance and as short as
possible for noise-free operation.
High-frequency noise in the V
DD
power supply may affect
the ADC
’
s high-speed comparator. Bypass this supply to
the single-point analog ground with 0.1μF and 10μF
bypass capacitors. Minimize capacitor lead lengths for
best supply noise rejection. To reduce the effects of sup-
ply noise, a 10
resistor can be connected as a lowpass
filter to attenuate supply noise (Figure 14).
Definitions
Integral Nonlinearity
Integral nonlinearity (INL) is the deviation of the values on
an actual transfer function from a straight line. This
straight line can be either a best-straight-line fit or a line
drawn between the endpoints of the transfer function,
once offset and gain errors have been nullified. The static
linearity parameters for the MAX1284/MAX1285 are mea-
sured using the endpoints method.
Differential Nonlinearity
Differential nonlinearity (DNL) is the difference between
an actual step width and the ideal value of 1LSB. A DNL
error specification of 1LSB or less guarantees no missing
codes and a monotonic transfer function.
CS
SCLK
DOUT
9
16
8
1
D0
D11
D10
D9
D8
D6
D5
D4
D3
D2
D1
D7
FIRST BYTE READ
SECOND BYTE READ
HIGH-Z
HIGH-Z
SCLK
DOUT
CS
14
1
3
D11
D10
D9
D8
D4
D5
D6
D3
D2
D1
D0
HIGH-Z
D7
HIGH-Z
Figure 12. SPI/MICROWIRE Serial Interface Timing (CPOL = CPHA = 0)
Figure 13. QSPI Serial Interface Timing (CPOL = 0, CPHA = 1)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1285BCSA | 400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference |
| MAX1285BESA | 400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference |
| MAX1284-MAX1285 | Enhanced Product 1.5 Degrees C Accurate Digital Temperature Sensor W/Spi Interface 6-SOT-23 -40 to 125 |
| MAX1284BCSA | 400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference |
| MAX1284BESA | 400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1284ACSA | 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1284ACSA+ | 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1284ACSA+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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1284ACSA-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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1284AESA | 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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