参数资料
型号: TLV1549CD
厂商: Texas Instruments
文件页数: 6/19页
文件大小: 0K
描述: IC 10 BIT 38 KSPS ADC S/O 8-SOIC
产品培训模块: Data Converter Basics
标准包装: 75
位数: 10
采样率(每秒): 38k
数据接口: 串行
转换器数目: 1
功率耗散(最大): 1.32mW
电压电源: 单电源
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 管件
输入数目和类型: 1 个单端,单极
产品目录页面: 896 (CN2011-ZH PDF)
其它名称: 296-2963-5
TLV1549C, TLV1549I, TLV1549M
10-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL
SLAS071C – JANUARY 1993 – REVISED MARCH 1995
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
simplified analog input analysis
Using the equivalent circuit in Figure 14, the time required to charge the analog input capacitance from 0 to VS
within 1/2 LSB can be derived as follows:
The capacitance charging voltage is given by
(1)
where
Rt = Rs + ri
VC VS 1–e
–tc RtCi
The final voltage to 1/2 LSB is given by
(2)
VC (1/2 LSB) = VS – (VS/2048)
Equating equation 1 to equation 2 and solving for time tc gives
(3)
and
tc (1/2 LSB) = Rt × Ci × ln(2048)
(4)
VS
VS 2048
VS 1–e
–tc RtCi
Therefore, with the values given the time for the analog input signal to settle is
(5)
tc (1/2 LSB) = (Rs + 1 kΩ) × 60 pF × ln(2048)
This time must be less than the converter sample time shown in the timing diagrams.
VI = Input Voltage at ANALOG IN
VS = External Driving Source Voltage
Rs = Source Resistance
ri = Input Resistance
Ci = Equivalent Input Capacitance
Driving source requirements:
Noise and distortion for the source must be equivalent to the
resolution of the converter.
Rs must be real at the input frequency.
Rs
ri
VS
VC
50 pF MAX
1 k
Ω MAX
Driving Source
TLV1549
Ci
VI
Figure 14. Equivalent Input Circuit Including the Driving Source
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TLV1549CDG4 功能描述:模数转换器 - ADC 10-Bit 38 kSPS Serial Out 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
TLV1549CDR 功能描述:模数转换器 - ADC 10-Bit 38 kSPS Serial Out 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
TLV1549CDRG4 功能描述:模数转换器 - ADC 10-Bit 38 kSPS Serial Out 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
TLV1549CP 功能描述:模数转换器 - ADC 3.3V 10bit A/D 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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