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| 型号： | MSC1210Y3PAGTG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 19/94页 |
| 文件大小： | 913K |
| 代理商： | MSC1210Y3PAGTG4 |
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MSC1210
SBAS203J MARCH 2002 REVISED JANUARY 2008
www.ti.com
26
This combines the low-noise advantage of the Sinc3 filter
with the quick response of the Fast Settling Time filter. The
frequency response of each filter is shown in Figure 16.
VOLTAGE REFERENCE
The MSC1210 can use either an internal or external
voltage reference. The voltage reference selection is
controlled via ADC Control Register 0 (ADCON0, SFR
DCh). The default power-up configuration for the voltage
reference is 2.5V internal.
The internal voltage reference can be selected as either
1.25V or 2.5V. The analog power supply (AVDD) must be
within the specified range for the selected internal voltage
reference. The valid ranges are: VREF = 2.5 internal
(AVDD = 3.3V to 5.25V) and VREF = 1.25 internal
(AVDD = 2.7V to 5.25V). If the internal VREF is selected,
then the REFOUT pin must be connected to REFIN+, and
AGND must be connected to REFIN. The REFOUT pin
should also have a 0.1
F capacitor connected to AGND,
as close as possible to the pin. If the internal VREF is not
used, then VREF should be disabled in ADCON0.
If the external voltage reference is selected, it can be used
as either a single-ended input or differential input, for
ratiometric measures. When using an external reference,
it is important to note that the input current will increase for
VREF with higher PGA settings and with a higher
modulator frequency. The external voltage reference can
be used over the input range specified in the Electrical
Characteristics section.
For applications requiring higher performance than that
obtainable from the internal reference, use an external
precision reference such as the REF50xx. The internal
reference performance can be observed in the noise (and
ENOB) versus input signal graphs in the Typical
Characteristics section. All the rest of the ENOB plots are
obtained with the inputs shorted together. By shorting the
inputs, the inherent noise performance of only the ADC
can be determined and displayed. When the inputs are not
shorted, the extra noise comes from the reference. As can
be seen in the ENOB vs Input Signal graph, the external
reference adds about 0.7 bits of noise, whereas the
internal reference adds about 2.3 bits of noise. This ENOB
performance of 19.4 represents 21.16 bits of noise. With
an LSB of 298nV, that translates to 6.3
V, or a
peaktopeak noise of almost 42
V. An external
reference provides the best noise, drift, and repeatability
performance for highprecision applications.
SINC3 FILTER RESPONSE
(
3dB = 0.262 f
DATA)
f
DATA
0
20
40
60
80
100
120
0
1
234
5
0
1
234
5
0
1
234
5
Ga
in
(d
B
)
SINC2 FILTER RESPONSE
(
3dB = 0.318 f
DATA)
f
DATA
0
20
40
60
80
100
120
Ga
in
(d
B
)
FAST SETTLING FILTER RESPONSE
(
3dB = 0.469 f
DATA)
f
DATA
0
20
40
60
80
100
120
NOTE: f
DATA = Normalized Data Output Rate = 1/tDATA
Ga
in
(d
B
)
Figure 16. Filter Frequency Responses
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相关代理商/技术参数 |
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| MSC1210Y4 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Precision Analog-to-Digital Converter (ADC) with 8051 Microcontroller and Flash Memory |
| MSC1210Y4PAGR | 功能描述:模数转换器 - ADC Prec ADC w/ 8051 Mcntrl & Flash 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 |
| MSC1210Y4PAGRG4 | 功能描述:模数转换器 - ADC Prec ADC w/ 8051 Mcntrl & Flash 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 |
| MSC1210Y4PAGT | 功能描述:模数转换器 - ADC Prec ADC w/ 8051 Mcntrl & Flash 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 |
| MSC1210Y4PAGTG4 | 功能描述:模数转换器 - ADC Prec ADC w/ 8051 Mcntrl & Flash 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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