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参数资料
| 型号： | MAX1325ECM+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/27页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 4CH 1.4MSPS 48LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 位数： | 14 |
| 采样率（每秒）： | 1.4M |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 4 个单端，双极 |
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MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326
8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs
with ±10V, ±5V, and 0 to +5V Analog Input Ranges
22
______________________________________________________________________________________
The input range is centered about VMSV, which is inter-
nally set to +2.500V. For a custom midscale voltage,
drive REFMS with an external voltage source and MSV
will follow REFMS. Noise present on MSV or REFMS
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, be careful not to violate the absolute
maximum voltage ratings of the analog inputs when
choosing VMSV. Determine the input voltage as a func-
tion of VREF, VMSV, and the output code in decimal
using the following equation:
Definitions
Integral Nonlinearity
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. For
these devices, this straight line is a line drawn between
the end points of the transfer function, once offset and
gain errors have been nullified.
Differential Nonlinearity
Differential nonlinearity (DNL) is the difference between
an actual step width and the ideal value of 1 LSB. For
these devices, the DNL of each digital output code is
measured and the worst-case value is reported in the
Electrical Characteristics table. A DNL error specifica-
tion of less than ±1 LSB guarantees no missing codes
and a monotonic transfer function.
Unipolar Offset Error
For the unipolar MAX1316/MAX1317/MAX1318, the ideal
zero-scale transition from 0x0000 to 0x0001 occurs at
1 LSB (see Figure 11). The unipolar offset error is the
amount of deviation between the measured zero-scale
transition point and the ideal zero-scale transition point.
Bipolar Offset Error
For the bipolar MAX1320/MAX1321/MAX1322/
MAX1324/MAX1325/MAX1326, the ideal zero-point tran-
sition from 0x3FFF to 0x0000 occurs at MSV, which is
usually connected to ground (see Figures 9 and 10).
The bipolar offset error is the amount of deviation
between the measured zero-point transition and the
ideal zero-point transition.
Gain Error
The ideal full-scale transition from 0x1FFE to 0x1FFF
occurs at 1 LSB below full scale (see the
Transfer
Functions section). The gain error is the amount of devi-
ation between the measured full-scale transition point
and the ideal full-scale transition point, once offset error
has been nullified.
Signal-to-Noise Ratio
For a waveform perfectly reconstructed from digital
samples, signal-to-noise ratio (SNR) is the ratio of the
full-scale analog input (RMS value) to the RMS quanti-
zation error (residual error). The ideal, theoretical mini-
mum analog-to-digital noise is caused by quantization
noise error only and results directly from the ADC’s res-
olution (N bits):
where N = 14 bits.
In reality, there are other noise sources besides quanti-
zation noise: thermal noise, reference noise, clock jitter,
etc. SNR is computed by taking the ratio of the RMS
signal to the RMS noise, which includes all spectral
components minus the fundamental, the first five har-
monics, and the DC offset.
SNR
N
dB
=×
+
(.
.
)
602
1 76
V
LSB
CODE
V
CH
MSV
_ =×
+
()
10
- 2.500V
Figure 11. 0 to +5V Unipolar Transfer Function
2 x VREF
2
14
1 LSB =
BINAR
Y
OUTPUT
CODE
0
2
16,383
16,381
0x0000
0x0001
0x0002
0x0003
0x3FFF
0x3FFE
0x3FFD
0x3FFC
0x1FFF
0x2000
0x2001
8190
8192
8194
(MSV)
INPUT VOLTAGE (LSBs)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1326ECM | 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 |
| MAX1326ECM+ | 功能描述:模数转换器 - ADC 14-Bit 2Ch 526ksps 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 |
| MAX1326ECM+T | 功能描述:模数转换器 - ADC 14-Bit 2Ch 526ksps 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 |
| MAX1326ECM-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 |
| MAX1327ECM | 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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