參數(shù)資料
型號(hào)： MAX132CWG
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： ADC
英文描述： 【18-Bit ADC with Serial Interface
中文描述： 18-BIT MULTI-SLOPE ADC, SERIAL ACCESS, PDSO24
封裝： SOP-24
文件頁(yè)數(shù)： 6/16頁(yè)
文件大?。?/td> 129K
代理商： MAX132CWG
____________Func tional Desc ription
The MAX132 integrates the input voltage for a fixed
period of time, then deintegrates a known reference
voltage and measures the time required to reach zero.
Good line rejection is achieved by setting the (input)
integration time equal to one 50Hz or 60Hz period. The
MAX132 has a 50Hz/60Hz mode selection bit that sets
the integration time to 655/545 clock periods, respec-
tively, so that 50Hz/60Hz rejection is obtained with a
32,768Hz crystal. The MAX132 is tested and guaran-
teed at a 16 conv/sec throughput rate. Figure 1 shows
the basic MAX132 application circuit, with component
values selected for 16 conv/sec .
For applications that don’t require 50Hz/60Hz rejection,
the MAX132 will operate up to 100 conv/sec at reduced
accuracy (typically 0.012% FSR nonlinearity, or ±13
bits). In these applications, the 50Hz mode is recom-
mended because of its longer (655 count) integration
time. See Increased Speed section.
__________Analog Design Proc edure
Input V oltage Range
and Input Protec tion
The recommended analog full-scale input range is
±512mV. Performance is tested and guaranteed at
±512mV full scale, corresponding to a 2μV/LSB resolu-
tion at 18 bits. Resolution is defined as follows:
which corresponds to 2μV/LSB resolution at 18 bits.
Consult the Typical Operating Characteristics for Noise
vs. Number of Samples Averaged and other important
operating parameters. Note how accuracy depends on
common-mode input voltage (common mode is defined
here as
|
V
IN
LO - AGND
|
). For optimum performance,
set the analog input full-scale between ±470mV and
M
±18-Bit ADC with S erial Interfac e
6
_______________________________________________________________________________________
Re
/
(
) /
,
solution Volts LSB
V
FS
IN
]
=
262144
3k
3k
DOUT
DOUT
a Hgh-Z toV
OH
(t
8
)
b Hgh-Z toV
OL
(t
8
)
DGND
DGND
+5V
C
L
C
L
Figure 3. Load Circuits for Access Time
3k
3k
DOUT
DOUT
a V
OH
toHgh-Z (t
10
)
b V
OL
toHgh-Z (t
10
)
DGND
DGND
+5V
10pF
10pF
Figure 4. Load Circuits for Disable Time to Three-State
DIN
t
2
t
4
t
1
t
3
t
9
t
10
t
6
t
8
t
7
t
11
, t
12
t
5
SCLK
CS
DOUT
P0–P3
MSB IN
B6–B1
LSB IN
LSB OUT
B6–B1
MSB OUT
Figure 2. Serial-Mode Timing
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX132CWG+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit .1ksps .545V 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
MAX132CWG+C10203 制造商:Maxim Integrated Products 功能描述:?18-BIT ADC WITH SERIAL INTERFACE - Rail/Tube
MAX132CWG+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit .1ksps .545V 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
MAX132CWG-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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
MAX132ENG 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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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