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參數(shù)資料
| 型號(hào)： | PCA200110AA |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 32 kHz watch circuit with programmable adaptive motor pulse |
| 中文描述： | 32千赫的可編程自適應(yīng)脈沖馬達(dá)手表電路 |
| 文件頁數(shù)： | 2/19頁 |
| 文件大?。?/td> | 120K |
| 代理商： | PCA200110AA |
2003 Dec 17
2
Philips Semiconductors
Product specification
32 kHz watch circuit with programmable
adaptive motor pulse
PCA2000; PCA2001
FEATURES
Amplitude-regulated 32 kHz quartz crystal oscillator,
with excellent frequency stability and high immunity to
leakage currents
Electrically programmable time calibration with 1 ppm
resolution stored in One Time Programmable (OTP)
memory
The quartz crystal is the only external component
connected
Very low power consumption, typical 90 nA
One second output pulses for bipolar stepping motor
Minimum power consumption for the entire watch, due
to self adaptation of the motor drive according to the
required torque
Reliable step detection circuit
Motor pulse width, pulse modulation, and pulse
adaptation range programmable in a wide range, stored
in OTP memory
Stop function for accurate time setting and power saving
during shelf life
End Of Life (EOL) indication for silver oxide or lithium
battery (only the PCA2000 has the EOL feature)
Test mode for accelerated testing of the mechanical
parts and the IC.
APPLICATIONS
Driver circuits for bipolar stepping motors
High immunity motor drive circuits.
GENERAL DESCRIPTION
The PCA2000; PCA2001 are CMOS integrated circuits for
battery operated wrist watches with a 32 kHz quartz
crystal as timing element and a bipolar 1 Hz stepping
motor. The quartz crystal oscillator and the frequency
divider are optimized for minimum power consumption.
A timing accuracy of 1 ppm is achieved with a
programmable, digital frequency adjustment.
To obtain the minimum overall power consumption for the
watch, an automatic motor pulse adaptation function is
provided. The circuit supplies only the minimum drive
current, which is necessary to ensure a correct motor step.
Changing the drive current of the motor is achieved by
chopping the motor pulse with a variable duty cycle. The
pulse width and the range of the variable duty cycle can be
programmedtosuitdifferenttypesofmotor.Theautomatic
pulse adaptation scheme is based on a safe dynamic
detection of successful motor steps.
A pad RESET is provided (used for stopping the motor) for
accurate time setting and for accelerated testing of the
watch.
The PCA2000 has a battery EOL warning function. If the
battery voltage drops below the EOL threshold voltage
(which can be programmed for silver oxide or lithium
batteries), the motor steps change from one pulse per
second to a burst of four pulses every 4 seconds.
The PCA2001 uses the same circuit as the PCA2000, but
without the EOL function.
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
PCA2000U/AA
PCA2001U/AA
PCA2000U/10AA
PCA2001U/10AA
bare die; chip in tray
bare die; chip in tray
bare die; chip on film frame carrier
bare die; chip on film frame carrier
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCA2001AA | 32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2002 | 32 kHz watch circuit with programmable output period and pulse width |
| PCA2002T | 32 kHz watch circuit with programmable output period and pulse width |
| PCA3004TPB | Amplifier. Other |
| PCA3006TPA | Amplifier. Other |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA2001AA | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2001CX8/5 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2001CX8/5/1,025 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 32KHZ WATCH CIRCUIT RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| PCA2001CX81 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
| PCA2001CX85 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable adaptive motor pulse |
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