- 您现在的位置：买卖IC网 > PDF目录98183 > TC850CPL 1-CH 15-BIT MULTI-SLOPE ADC, PARALLEL ACCESS, PDIP40 PDF资料下载
参数资料
| 型号： | TC850CPL |
| 元件分类： | ADC |
| 英文描述： | 1-CH 15-BIT MULTI-SLOPE ADC, PARALLEL ACCESS, PDIP40 |
| 封装： | PLASTIC, DIP-40 |
| 文件页数： | 7/26页 |
| 文件大小： | 417K |
| 代理商： | TC850CPL |
2006 Microchip Technology Inc.
DS21479C-page 15
TC850
7.0
ANALOG SECTION TYPICAL
APPLICATIONS
7.1
Component Selection
7.1.1
REFERENCE VOLTAGE
The typical value for reference voltage VREF1 is
1.6384V. This value yields a full scale voltage of
3.2768V and resolution of 100
μV per step. The VREF2
value is derived by dividing VREF1 by 64. Thus, typical
VREF2 value is 1.6384V/64, or 25.6 mV. The VREF2
value should be adjusted within ±1% to maintain 15-bit
accuracy for the total conversion process;
EQUATION 7-1:
:
The reference voltage is not limited to exactly 1.6384V,
however, because the TC850 performs a ratiometric
conversion. Therefore, the conversion result will be:
EQUATION 7-2:
The full scale voltage can range from 3.2V to 3.5V. Full
scale voltages of less than 3.2V will result in increased
noise in the Least Significant bits, while a full scale
above 3.5V will exceed the input common-mode range.
7.1.2
INTEGRATION RESISTOR
The TC850 buffer supplies 25
μA of integrator charging
current with minimal linearity error. RINT is easily
calculated:
EQUATION 7-3:
For a full scale voltage of 3.2768V, values of RINT
between 120 k
Ω and 150 kΩ are acceptable.
7.1.3
INTEGRATION CAPACITOR
The integration capacitor should be selected to
produce an integrator swing of
≈ 4V at full scale. The
capacitor value is easily calculated:
EQUATION 7-4:
The integration capacitor should be selected for low
dielectric absorption to prevent rollover errors. A
polypropylene, polyester or polycarbonate dielectric
capacitor is recommended.
7.1.4
REFERENCE CAPACITORS
The reference capacitors require a low-leakage dielec-
tric, such as polypropylene, polyester or polycarbon-
ate. A value of 1
μF is recommended for operation over
the temperature range. If high-temperature operation is
not required, the CREF values can be reduced.
7.1.5
AUTO-ZERO CAPACITORS
Five capacitors are required to auto-zero the input
buffer, integrator amplifier and comparator. Recom-
mended capacitors are 0.1
μF film dielectric (such as
polyester or polypropylene). Ceramic capacitors are
not recommended.
VREF =
VREF1 ± 1%
64
Digital Counts =
16384
VIN
VREF1
RINT =
VFULLSCALE
25
μA
C =
VFS
RINT
4 256
4V FCLOCK
where:
FCLOCK is the crystal or external oscillator
frequency and VFS is the maximum input voltage.
相关PDF资料 |
PDF描述 |
|---|---|
| TC850IJL | 1-CH 15-BIT MULTI-SLOPE ADC, PARALLEL ACCESS, CDIP40 |
| TC850ILW713 | 1-CH 15-BIT MULTI-SLOPE ADC, PARALLEL ACCESS, PQCC44 |
| TC850ILWTR | 1-CH 15-BIT MULTI-SLOPE ADC, PARALLEL ACCESS, PQCC44 |
| TC850CLW | 1-CH 15-BIT MULTI-SLOPE ADC, PARALLEL ACCESS, PQCC44 |
| TC850CLWTR | 1-CH 15-BIT MULTI-SLOPE ADC, PARALLEL ACCESS, PQCC44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC850IJL | 功能描述:模数转换器 - ADC 16 Bit Hi Speed 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 |
| TC850ILW | 功能描述:模数转换器 - ADC 16 Bit Hi Speed 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 |
| TC850ILW713 | 功能描述:模数转换器 - ADC 16 Bit Hi Speed 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 |
| TC8521AM | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:REAL TIME CLOCK ケ |
| TC8521AP | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:REAL TIME CLOCK ケ |
发布紧急采购，3分钟左右您将得到回复。