参数资料
型号: TC7109CPL
厂商: Microchip Technology
文件页数: 8/30页
文件大小: 0K
描述: IC ADC 12BIT HANDSHAKE 40DIP
标准包装: 10
位数: 12
数据接口: 串行,并联
转换器数目: 1
电压电源: 双 ±
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: 40-DIP(0.600",15.24mm)
供应商设备封装: 40-PDIP
包装: 管件
输入数目和类型: 1 个差分,单极
产品目录页面: 673 (CN2011-ZH PDF)
其它名称: 158-1059
158-1059-ND
TC7109/A
DS21456C-page 16
2006 Microchip Technology Inc.
3.5.6
REFERENCE SOURCES
A major factor in the absolute accuracy of the ADC is
the stability of the reference voltage. The 12-bit resolu-
tion of the TC7109A is one part in 4096, or 244 ppm.
Thus, for the on-board reference temperature coeffi-
cient of 70ppm/°C, a temperature difference of 3°C will
introduce a one-bit absolute error. Where the ambient
temperature is not controlled, or where high accuracy
absolute
measurements
are
being
made,
it
is
recommended that an external high quality reference
be used.
A reference output (Pin 29) is provided, which may be
used with a resistive divider to generate a suitable ref-
erence voltage (20mA may be sunk without significant
variation in output voltage). A pull-up bias device is pro-
vided, which sources about 10
μA. The output voltage is
nominally 2.8V below V+. When using the on-board
reference, REF OUT (Pin 29) should be connected to
REF IN- (pin 39), and REF IN+ should be connected to
the wiper of a precision potentiometer between REF
OUT and V+. The test circuit shows the circuit for a
204.8mV reference, generated by a 2k
Ω precision
potentiometer in series with a 24k
Ω fixed resistor.
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TC7109CPL 制造商:Microchip Technology Inc 功能描述:IC 12BIT ADC 7109 DIP40
TC7109CPL 制造商:Microchip Technology Inc 功能描述:Special Function IC Package/Case:40-PDIP
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