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参数资料
| 型号： | MAX1270EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | EVALUATION KIT FOR MAX1270 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 110k |
| 数据接口： | 串行 |
| 输入范围： | ±10 V |
| 在以下条件下的电源（标准）： | 30mW @ 110kSPS |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | MAX1270，MAX1271，MAX127，MAX128 |
| 已供物品： | 板，CD |
MAX1270/MAX1271
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 VDD with 0.1F and 4.7F
capacitors to AGND to minimize highand low-frequency
fluctuations. If the supply is excessively noisy, connect
a 5 resistor between the supply and VDD, as shown in
Figure 15.
VDD
GND
DGND
AGND
+5V
SUPPLY
R* = 5
DIGITAL
CIRCUITRY
4.7
F
0.1
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 - 3/2LSB
1 LSB =
FULL-SCALE
TRANSITION
12
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
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相关代理商/技术参数 |
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|---|---|
| MAX1270EVKIT+ | 功能描述:数据转换 IC 开发工具 MAX1270/71 MAX127/8 Eval System RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| MAX1271ACAI | 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 |
| MAX1271ACAI+ | 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 |
| MAX1271ACAI+T | 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 |
| MAX1271ACAI-T | 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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