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参数资料
| 型号： | TSL1301 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDIP8 |
| 封装： | PLASTIC, DIP-8 |
| 文件页数： | 2/8页 |
| 文件大小： | 131K |
| 代理商： | TSL1301 |
TSL1301
102
× 1 LINEAR SENSOR ARRAY
WITH HOLD
SOES031A – NOVEMBER 1996 – REVISED MAY 1997
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
DESCRIPTION
NAME
NO.
DESCRIPTION
AO
3
Analog output
CLK
2
Clock. The clock controls charge transfer, pixel output, and reset.
GND
6, 7
Ground (substrate). All voltages are referenced to the substrate.
NC
5, 8
No internal connection
SI
1
Serial input. SI defines the start of the data-out sequence.
VDD
4
Supply voltage. Supply voltage for both analog and digital circuits.
detailed description
The sensor consists of 102 photodiodes, also called pixels, arranged in a linear array. Light energy impinging
on a pixel generates photocurrent, which is then integrated by the active integration circuitry associated with
that pixel.
During the integration period, a sampling capacitor connects to the output of the integrator through an analog
switch. The amount of charge accumulated at each pixel is directly proportional to the light intensity and the
integration time.
The output and reset of the integrators is controlled by a 102-bit shift register and reset logic. An output cycle
is initiated by clocking in a logic 1 on SI. This causes all 102 sampling capacitors to be disconnected from their
respective integrators and starts an integrator reset period. As the SI pulse is clocked through the shift register,
the charge stored on the sampling capacitors is sequentially connected to a charge-coupled output amplifier
that generates a voltage on analog output AO. The integrator reset period ends 18 clock cycles after the SI pulse
is clocked in. Then the next integration period begins. Note that a total 103 clock cycles are required, the 103rd
cycle being necessary to terminate the output of pixel 102 and return the output to a high-impedance state, and
to clear the internal shift register.
AO is driven by a source follower that requires an external pulldown resistor. When the output is not in the output
phase, it is in a high-impedance state. The output is nominally 0 V for no light input and 2 V for a nominal full-scale
output.
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