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参数资料
| 型号： | MAX1271BENG |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| 中文描述： | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP24 |
| 封装： | 0.300 INCH, PLASTIC, DIP-24 |
| 文件页数： | 17/20页 |
| 文件大小： | 808K |
| 代理商： | MAX1271BENG |
M
Multirange, +5V, 8-Channel,
Serial 12-Bit ADCs
______________________________________________________________________________________
17
Transfer Function
Output data coding for the MAX1270/MAX1271 is bina-
ry in unipolar mode with 1 LSB = (FS / 4096) and two’s
complement binary in bipolar mode with 1 LSB = [(2 x
|FS |) / 4096]. Code transitions occur halfway between
successive-integer LSB values. Figures 14a and 14b
show the input/output (I/O) transfer functions for unipo-
lar and bipolar operations, respectively. For full-scale
values, refer to Table 3.
Layout, Grounding, and Bypassing
Careful PC board layout is essential for best system
performance. Use a ground plane for best perfor-
mance. To reduce crosstalk and noise injection, keep
analog and digital signals separate. Connect analog
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 impedance and as
short as possible. Connect the logic grounds directly to
the supply ground. Bypass V
DD
with 0.1μF and 4.7μF
capacitors to AGND to minimize highand low-frequency
fluctuations. If the supply is excessively noisy, connect
a 5
resistor between the supply and V
DD
, as shown in
Figure 15.
V
DD
GND
DGND
DGND
AGND
+5V
+5V
SUPPLY
R* = 5
DIGITAL
CIRCUITRY
4.7
μ
F
0.1
μ
F
MAX1270
MAX1271
**
*OPTIONAL
**CONNECT AGND AND DGND WITH A GROUND PLANE OR A SHORT TRACE.
Figure 15. Power-Supply Grounding Connections
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 14a. 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 14b. Bipolar Transfer Function
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1270 | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| MAX1270-MAX1271 | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| MAX1270ACAI | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| MAX1270ACNG | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| MAX1270BCAI | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1271BENG+ | 功能描述:模数转换器 - ADC 12-Bit 8Ch 110ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1272BCPA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1272CPA | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1272CPA+ | 功能描述:模数转换器 - ADC 12-Bit 487ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1272CUA | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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