參數(shù)資料
型號: MAX1111EPE+
廠商: Maxim Integrated Products
文件頁數(shù): 10/20頁
文件大小: 0K
描述: IC ADC 8BIT LP 16-DIP
標(biāo)準(zhǔn)包裝: 25
位數(shù): 8
采樣率(每秒): 50k
數(shù)據(jù)接口: MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 667mW
電壓電源: 單電源
工作溫度: 0°C ~ 70°C
安裝類型: 通孔
封裝/外殼: 16-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 16-PDIP
包裝: 管件
輸入數(shù)目和類型: 4 個單端,單極;2 個差分,單極
Layout, Grounding, and Bypassing
For best performance, use printed circuit boards. Wire-
wrap boards are not recommended. Board layout
should ensure that digital and analog signal lines are
separated from each other. Do not run analog and digi-
tal (especially clock) lines parallel to one another, or
digital lines underneath the ADC package.
Figure 17 shows the recommended system ground
connections. A single-point analog ground (star ground
point) should be established at AGND, separate from
the logic ground. Connect all other analog grounds and
DGND to the star ground. No other digital system
ground should be connected to this ground. The
ground return to the power supply for the star ground
should be low impedance and as short as possible for
noise-free operation.
High-frequency noise in the VDD power supply can
affect the comparator in the ADC. Bypass the supply to
the star ground with 0.1F and 1F capacitors close to
the VDD pin of the MAX1110/MAX1111. Minimize
capacitor lead lengths for best supply-noise rejection. If
the +3V power supply is very noisy, a 10Ω resistor can
be connected to form a lowpass filter.
MAX1110/MAX1111
+2.7V, Low-Power, Multichannel,
Serial 8-Bit ADCs
18
______________________________________________________________________________________
+3V
GND
SUPPLIES
DGND
+3V
DGND
AGND
VDD
DIGITAL
CIRCUITRY
MAX1110
MAX1111
R* = 10
Ω
* OPTIONAL
Figure 17. Power-Supply Grounding Connections
01111111
OUTPUT CODE
01111110
00000010
00000001
00000000
11111111
11111110
11111101
10000001
10000000
-FS
COM
INPUT VOLTAGE (LSB)
+FS -
1
LSB
2
+FS =
VREFIN
+ COM
2
-FS =
-VREFIN
+ COM
2
COM =
VREFIN
2
1LSB =
VREFIN
256
Figure 16. Bipolar Transfer Function
OUTPUT CODE
FULL-SCALE
TRANSITION
11111111
11111110
11111101
00000011
00000010
00000001
00000000
12
3
0
FS
FS - 1LSB
FS = VREFIN + COM
1LSB = VREFIN
256
INPUT VOLTAGE (LSB)
(COM)
Figure 15. Unipolar Transfer Function
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MAX1111MJE 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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