参数资料
型号: MAX1313ECM
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: ADC
英文描述: 8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs with 【10V, 【5V, and 0 to +5V Analog Input Ranges
中文描述: 4-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48
封装: 7 X 7 MM, 1.40 MM HEIGHT, MS-026BBC, TQFP-48
文件页数: 28/36页
文件大小: 487K
代理商: MAX1313ECM
M
8-/4-/2-Channel,12-Bit,Simultaneous-Sampling ADCs
with ±10V, ±5V, and 0 to +5V Analog Input Ranges
28
______________________________________________________________________________________
Bipolar ±5V Devices
Table 6 and Figure 13 show the two’s complement trans-
fer function for the ±5V input range MAX1308/MAX1309/
MAX1310. The FSR is four times the voltage at REF. The
internal +2.5V reference gives a +10V FSR, while an
external +2V to +3V reference allows an FSR of +8V to
+12V respectively. Calculate the LSB size using:
which equals 2.44mV when using a 2.5V reference.
The input range is centered about V
MSV
. Normally,
MSV = AGND, and the input is symmetrical about zero.
For a custom midscale voltage, drive MSV with an
external voltage source. Noise present on MSV directly
couples into the ADC result. Use a precision, low-drift
voltage reference with adequate bypassing to prevent
MSV from degrading ADC performance. For maximum
FSR, do not violate the absolute maximum voltage rat-
ings of the analog inputs when choosing MSV.
Determine the input voltage as a function of V
REF
,
V
MSV
, and the output code in decimal using:
V
CH_
= LSB x CODE
10
+ V
MSV
1
4
2
12
LSB
x V
REF
=
Table 6. ±5V Bipolar Code Table
TWO’s
COMPLEMENT
DIGITAL OUTPUT
CODE
DECIMAL
EQUIVALENT
DIGITAL OUTPUT
CODE
(CODE
10
)
INPUT VOLTAGE
(V)
V
REF
= +2.5V
V
MSV
= 0
(
0111 1111 1111 =
0x7FF
+2047
+4.9988 ± 0.5 LSB
0111 1111 1110 =
0x7FE
+2046
+4.9963 ± 0.5 LSB
0000 0000 0001 =
0x001
+1
+0.0037 ± 0.5 LSB
0000 0000 0000 =
0x000
0
+0.0012 ± 0.5 LSB
1111 1111 1111 =
0xFFF
-1
-0.0012 ± 0.5 LSB
1000 0000 0001 =
0x801
-2047
-4.9963 ± 0.5 LSB
1000 0000 0000 =
0x800
-2048
-4.9988 ± 0.5 LSB
)
4 x V
REF
4 x V
REF
2
12
1 LSB =
T
-2048 -2046
+2047
+2045
0x800
0x801
0x802
0x803
0x7FF
0x7FE
0x7FD
0x7FC
0xFFF
0x000
0x001
-1 0 +1
(MSV)
INPUT VOLTAGE (V
CH_
- V
MSV
IN LSBs)
Figure 13. ±5V Bipolar Transfer Function
相关PDF资料
PDF描述
MAX1314ECM 8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs with 【10V, 【5V, and 0 to +5V Analog Input Ranges
MAX1310ECM 8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs with 【10V, 【5V, and 0 to +5V Analog Input Ranges
MAX1312ECM 8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs with 【10V, 【5V, and 0 to +5V Analog Input Ranges
MAX1305ECM 8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs with 【10V, 【5V, and 0 to +5V Analog Input Ranges
MAX1306ECM 8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs with 【10V, 【5V, and 0 to +5V Analog Input Ranges
相关代理商/技术参数
参数描述
MAX1313ECM+ 功能描述:模数转换器 - ADC 12-Bit 4Ch 1.075Msps 3V 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
MAX1313ECM+T 功能描述:模数转换器 - ADC 12-Bit 4Ch 1.075Msps 3V 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
MAX1313ECM-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
MAX1314ECM 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
MAX1314ECM+ 功能描述:模数转换器 - ADC 12-Bit 2Ch 1.075Msps 3V 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