TC9400CPD

更新时间： 2024-01-20 01:31:22

品牌	Logo	应用领域
美国微芯 - MICROCHIP		转换器模拟特殊功能转换器光电二极管 PC
页数	文件大小	规格书
20页	504K
描述
Voltage-to-Frequency/Frequency-to-Voltage Converters

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技术参数
数据手册

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TC9400CPD 技术参数

生命周期：	Obsolete	零件包装代码：	DIP
包装说明：	SDIP, SDIP24,.3	针数：	24
Reach Compliance Code：	unknown	风险等级：	5.73
转换器类型：	D/A CONVERTER	输入位码：	BINARY
输入格式：	SERIAL	JESD-30 代码：	R-PDIP-T24
长度：	22 mm	位数：	1
功能数量：	1	端子数量：	24
最高工作温度：	85 °C	最低工作温度：	-35 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SDIP
封装等效代码：	SDIP24,.3	封装形状：	RECTANGULAR
封装形式：	IN-LINE, SHRINK PITCH	电源：	5 V
认证状态：	Not Qualified	座面最大高度：	4.5 mm
子类别：	Other Converters	最大压摆率：	40 mA
标称供电电压：	5 V	表面贴装：	NO
技术：	CMOS	温度等级：	OTHER
端子形式：	THROUGH-HOLE	端子节距：	1.778 mm
端子位置：	DUAL	宽度：	7.62 mm
Base Number Matches：	1

TC9400CPD 数据手册

TC9400/9401/9402

4.3

Freq/2 Out

4.8

I_IN

This output is an open drain N-channel FET, which pro-

vides a square wave one-half the frequency of the

pulse frequency output. The FREQ/2 OUT output will

change state on the rising edge of PULSE FREQ OUT.

This output requires a pull-up resistor and interfaces

directly with MOS, CMOS, and TTL logic.

The inverting input of the operational amplifier and the

summing junction when connected in the V/F mode. An

input current of 10µA is specified, but an over range

current up to 50µA can be used without detrimental

effect to the circuit operation. I connects the summing

junction of an operational amplifier. Voltage sources

cannot be attached directly, but must be buffered by

external resistors.

4.4

Output Common

The sources of both the FREQ/2 OUT and the PULSE

FREQ OUT are connected to this pin. An output level

4.9

V_REF

swing from the drain voltage to ground, or to the V

A reference voltage from either a precision source, or

supply, may be obtained by connecting this pin to the

appropriate point.

the V supply is applied to this pin. Accuracy of the

TC9400 is dependent on the voltage regulation and

temperature characteristics of the reference circuitry.

4.5

R_BIAS

Since the TC9400 is a charge balancing V/F converter,

the reference current will be equal to the input current.

For this reason, the DC impedance of the reference

voltage source must be kept low enough to prevent lin-

earity errors. For linearity of 0.01%, a reference imped-

ance of 200W or less is recommended. A 0.1µF bypass

An external resistor, connected to V , sets the bias

point for the TC9400. Specifications for the TC9400 are

based on R

noted.

= 100kΩ ±10%, unless otherwise

BIAS

Increasing the maximum frequency of the TC9400

beyond 100kHz is limited by the pulse width of the

capacitor should be connected from V

to ground.

REF

pulse output (typically 3µsec). Reducing R

decrease the pulse width and increase the maximum

operating frequency, but linearity errors will also

will

BIAS

4.10 V_REFOut

The charging current for C

is supplied through this

REF

increase. R

can be reduced to 20kΩ, which will

pin. When the Op Amp output reaches the threshold

level, this pin is internally connected to the reference

BIAS

typically produce a maximum full scale frequency of

500kHz.

voltage and a charge, equal to V

x C

, is removed

REF

from the integrator capacitor. After about 3µsec, this pin

is internally connected to the summing junction of the

4.6

Amplifier Out

Op Amp to discharge C . Break-before-make switch-

ing ensures that the reference voltage is not directly

applied to the summing junction.

REF

This pin is the output stage of the operational amplifier.

During V/F operation, a negative going ramp signal is

available at this pin. In the F/V mode, a voltage

proportional to the frequency input is generated.

4.7

Zero Adjust

This pin is the non-inverting input of the operational

amplifier. The low frequency set point is determined by

adjusting the voltage at this pin.

2002 Microchip Technology Inc.

DS21483B-page 9

1...6 7 8910 11 12...20

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与TC9400CPD相关器件

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TC9400E/OD	MICROCHIP	IC,VOLTAGE-TO-FREQUENCY CONVERTER,CMOS,SOP,14PIN	获取价格
TC9400E/PD	MICROCHIP	IC,VOLTAGE-TO-FREQUENCY CONVERTER,CMOS,DIP,14PIN	获取价格
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