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参数资料
| 型号： | MAX127BCAI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC DAS 12BIT 2-WIRE 28-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 46 |
| 类型： | 数据采集系统（DAS），ADC |
| 分辨率（位）： | 12 b |
| 采样率（每秒）： | 8k |
| 数据接口： | I²C，串行 |
| 电压电源： | 单电源 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 管件 |
| 产品目录页面： | 1393 (CN2011-ZH PDF) |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX127BCAI+ | 功能描述:数据转换系统 12-Bit 8Ch 8ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 转换速率:0.001 MSPs 分辨率:24 bit 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX127BCAI+ | 制造商:Maxim Integrated Products 功能描述:CONVERTOR AD ((NW)) |
| MAX127BCAI+T | 功能描述:数据转换系统 12-Bit 8Ch 8ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 转换速率:0.001 MSPs 分辨率:24 bit 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX127BCAI-T | 功能描述:数据转换系统 RoHS:否 制造商:Texas Instruments 转换速率:0.001 MSPs 分辨率:24 bit 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX127BCNG | 功能描述:数据转换系统 RoHS:否 制造商:Texas Instruments 转换速率:0.001 MSPs 分辨率:24 bit 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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