參數(shù)資料
型號(hào)： MAX127ACAI+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 7/16頁(yè)
文件大?。?/td> 0K
描述： IC DAS 12BIT 2-WIRE 28-SSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,000
類型： 數(shù)據(jù)采集系統(tǒng)（DAS），ADC
分辨率（位）： 12 b
采樣率（每秒）： 8k
數(shù)據(jù)接口： I²C，串行
電壓電源： 單電源
電源電壓： 4.75 V ~ 5.25 V
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 28-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 28-SSOP
包裝： 帶卷 (TR)
Transfer Function
Output data coding for the MAX127/MAX128 is binary
in unipolar mode with 1LSB = (FS/4096) and
two’s complement binary in bipolar mode with 1LSB =
[(2 x | FS |) / 4096]. Code transitions occur halfway
between successive-integer LSB values. Figures 13a
and 13b show the input/output (I/O) transfer functions
for unipolar and bipolar operations, respectively. For
full-scale (FS) values, refer to Table 3.
Layout, Grounding, and Bypassing
Careful printed circuit board layout is essential for best
system performance. For best performance, use a
ground plane. To reduce crosstalk and noise injection,
keep analog and digital signals separate. Connect ana-
log grounds and DGND in a star configuration to
AGND. For noise-free operation, ensure the ground
return from AGND to the supply ground is low imped-
ance and as short as possible. Connect the logic
grounds directly to the supply ground. Bypass VDD with
0.1F and 4.7F capacitors to AGND to minimize high-
and low-frequency fluctuations. If the supply is exces-
sively noisy, connect a 5
resistor between the supply
and VDD, as shown in Figure 14.
MAX127/MAX128
Multirange, +5V, 12-Bit DAS with
2-Wire Serial Interface
______________________________________________________________________________________
15
OUTPUT CODE
INPUT VOLTAGE (LSB)
0
FS
FS - 3/2 LSB
1 LSB =
FULL-SCALE
TRANSITION
1
2
3
11... 111
11... 110
11... 101
00... 011
00... 010
00... 001
00... 000
FS
4096
Figure 13a. Unipolar Transfer Function
OUTPUT CODE
INPUT VOLTAGE (LSB)
0
+FS - 1 LSB
1 LSB =
-FS
011... 111
011... 110
000... 001
000... 000
111... 111
100... 010
100... 001
100... 000
2
FS
4096
Figure 13b. Bipolar Transfer Function
VDD
GND
DGND
AGND
+5V
SUPPLY
R* = 5
DIGITAL
CIRCUITRY
4.7
F
0.1
F
MAX127
MAX128
**
* OPTIONAL
** CONNECT AGND AND DGND WITH A GROUND PLANE OR A SHORT TRACE.
Figure 14. Power-Supply Grounding Connection
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX127ACNG 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX127ACNG+ 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) 12-Bit 8Ch 8ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX127AEAI 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX127AEAI/GH9 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX127AEAI/GH9-T 功能描述:數(shù)據(jù)轉(zhuǎn)換系統(tǒng) RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率:0.001 MSPs 分辨率:24 bit 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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