參數(shù)資料
型號： MAX1272CPA
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： ADC
英文描述： Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range
中文描述： 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8
封裝： 0.300 INCH, PLASTIC, MO-058, DIP-8
文件頁數(shù)： 10/20頁
文件大?。?/td> 850K
代理商： MAX1272CPA
M
Input Data Format
Input data (control byte) clocks in at DIN on the rising
edge of SCLK.
CS
enables communication with the
MAX1272/MAX1273. After
CS
falls, the first arriving 1
represents the start bit (MSB) of the input control byte.
The start bit is defined as follows:
1) The first high bit clocked into DIN with
CS
low any
time the converter is idle (e.g., after applying V
DD
).
2) The first high bit clocked into DIN after bit 4 (D4) of a
conversion in progress clocks out on DOUT.
See Table 1 for programming the control byte. Figure 4
shows the detailed serial interface timing.
Output Data Format
Output data (DOUT) clocks out MSB first on the falling
edge of SCLK. The unipolar mode provides a straight
binary output. The bipolar mode provides a two
’
s com-
plement binary output. For output binary codes, see the
Transfer Function
section.
Fault-Protected, 12-Bit ADCs
with Software-Selectable Input Range
10
______________________________________________________________________________________
INPUT RANGE
RNG
BIP
NEGATIVE
FULL SCALE
ZERO SCALE
FULL SCALE
0 to 5V
±
5V
0 to 10V
±
10V
0
0
1
1
0
1
0
1
—
0
0
0
0
V
REF
×
1.2207
V
REF
×
1.2207
V
REF
×
2.4414
V
REF
×
2.4414
-V
REF
×
1.2207
—
-V
REF
×
2.4414
Table 2. Input Range and Polarity Selection for MAX1272
INPUT RANGE
RNG
BIP
NEGATIVE
FULL SCALE
ZERO SCALE
FULL SCALE
0 to V
REF
/ 2
±
V
REF
/ 2
0 to V
REF
±
V
REF
0
0
1
1
0
1
0
1
—
0
0
0
0
V
REF
/ 2
V
REF
/ 2
V
REF
V
REF
-V
REF
/ 2
—
-V
REF
Table 3. Input Range and Polarity Selection for MAX1273
PD
MODE1
MODE0
MODE
1
X
X
Normal operation (ADCs always active). Automatically enters delayed
standby power-down mode between conversions.
0
1
0
1
Delayed standby power-down mode.
Immediate standby power-down mode.
Delayed full power-down mode.
Immediate full power-down mode.
0
0
1
Table 4. Power-Down Selection
R3
4.8k
R2
R1
AIN
S1
S2
S3
S4
BIPOLAR
UNIPOLAR
VOLTAGE
REFERENCE
T/H
OUT
HOLD
TRACK
TRACK
HOLD
OFF
ON
C
HOLD
S1 = BIPOLAR/UNIPOLAR SWITCH
S2 = INPUT MUX SWITCH
S3, S4 = T/H SWITCH
R1 = 11.3k
(MAX1272)
or 4.8k
(MAX1273)
R2 = 7.8k
(MAX1272)
or
∞
(OPEN)
(MAX1273)
Figure 3. Equivalent Input Circuit
相關(guān)PDF資料
PDF描述
MAX1272 Fault-Protected. 12-Bit ADCs with Software-Selectable Input Range
MAX1273 Fault-Protected. 12-Bit ADCs with Software-Selectable Input Range
MAX1272EUA Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range
MAX1273EUA Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range
MAX1272EPA Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1272CPA+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 487ksps 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
MAX1272CUA 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
MAX1272CUA+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC FAULT-PROTECTED 12-BIT 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
MAX1272CUA+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC FAULT-PROTECTED 12-BIT 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
MAX1272EPA 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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