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参数资料
| 型号： | MAX1069BEUD+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT I2C 58KSPS 14-TSSOP |
| 标准包装： | 96 |
| 位数： | 14 |
| 采样率（每秒）： | 58k |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 12.5mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 管件 |
| 输入数目和类型： | 1 个单端，单极 |
Internal Reference
The MAX1069 contains an internal 4.096V bandgap ref-
erence. This bandgap reference is connected to
REFADJ through a 5k
resistor. Bypass REFADJ with a
0.1F capacitor to AGND. The MAX1069 reference
buffer has a unity gain to provide +4.096V at REF.
Bypass REF with a 10F capacitor to AGND when the
internal reference is used (Figure 12).
The internal reference is adjustable to ±1.5% using the
Figure 13 circuit.
External Reference
For external reference operation, disable the internal
reference by connecting REFADJ to AVDD. During con-
version, an external reference at REF must deliver up to
100A of DC load current and have an output imped-
ance of less than 10
.
For optimal performance, buffer the reference through
an op amp and bypass REF with a 10F capacitor.
Consider the MAX1069’s equivalent input noise
(80VRMS) when choosing a reference.
Transfer Function
The MAX1069 has a standard unipolar transfer function
with a valid analog input voltage range from VAGNDS to
VREF. Output data coding is binary with 1LSB =
(VREF/2N) where ‘N’ is the number of bits (14). Code
transitions occur halfway between successive-integer
LSB values. Figure 14 shows the MAX1069 input/output
(I/O) transfer function.
Input Buffer
Most applications require an input buffer amplifier to
achieve 14-bit accuracy. If the input signal is multi-
plexed, the input channel should be switched immedi-
ately after acquisition, rather than near the end of or
MAX1069
58.6ksps, 14-Bit, 2-Wire Serial ADC
in a 14-Pin TSSOP
______________________________________________________________________________________
17
Figure 12. Internal Reference
4.096V
BANDGAP
REFERENCE
5k
SAR
ADC
REF
0.1
F
10
F
REF
REFADJ
4.096V
AGND
DGND
AV = 1.0
12
13
9
1
MAX1069
Figure 13. Adjusting the Internal Reference
4.096V
BANDGAP
REFERENCE
5k
SAR
ADC
REF
0.1
F
10
F
REF
REFADJ
4.096V
AGND
DGND
AV = 1.0
12
13
9
1
MAX1069
0.1
F
150k
100k
POTENTIOMETER
68k
AVDD
5.0V
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1069BEUD+ | 功能描述:模数转换器 - ADC 58.6ksps 14-Bit 2-Wire Serial 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 |
| MAX1069BEUD+T | 功能描述:模数转换器 - ADC 58.6ksps 14-Bit 2-Wire Serial 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 |
| MAX1069BEUD-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 |
| MAX1069CCUD | 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 |
| MAX1069CCUD+ | 功能描述:模数转换器 - ADC Integrated Circuits (ICs) 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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