công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
M02009 bảng dữ liệu(PDF) 8 Page - List of Unclassifed Manufacturers |
|
M02009 bảng dữ liệu(HTML) 8 Page - List of Unclassifed Manufacturers |
8 / 19 page 3 Mindspeed Technologies™ 02009-DSH-001-D Mindspeed Proprietary and Confidential M02009 Data Sheet Single-ended amplifiers have inherently poor power supply noise rejection. For this reason, an on-chip low dropout linear regulator has been incorporated into the design to give excellent noise rejection up to several MHz. Higher frequency power supply noise is removed by external decoupling. The circuit is designed for PIN photodiodes in the “grounded cathode” configuration, with the anode connected to the input of the TIA and the cathode connected to AC ground. Reverse DC bias is applied to reduce the photodiode capacitance. 1.3.2 AGC The MC2009 has been designed to operate over the input range of +3 dBm to –32 dBm at long wavelengths. This represents a ratio of 1:3000, whereas the acceptable dynamic range of the output is only 1:100 which implies a compression of 30:1 in the transimpedance. The design uses a MOS transistor to achieve the transimpedance variation. Another feature of the AGC is that it is only operates on signals greater than –20 dBm (@ 0.9A/W). This knee in the gain response is important when setting “signal detect” functions in the following postamplifier. It also aids in active photodiode alignment. The AGC pad allows the AGC to be disabled during photodiode alignment by grounding the pad through a low impedance. The AGC control voltage can be monitored during normal operation at this pad by a high impedance (>10 M Ω) circuit. In addition, taking this pad to V CC +1.2V enables an internal test oscillator which supplies a 1 MHz 10 uA pk(approximate) square wave current internally between the PIN K and PIN A pads to emulate a pho- todiode for test purposes. 1.3.3 Output Stage The signal from the TIA enters a phase splitter and a pair of voltage follower outputs. These are designed to drive a high impedance (>500 Ω) load. They are stable for driving capacitive loads such as interstage filters. Each output has its own GND pad, all four GND pads on the chip should be connected for proper operation. Since the MC2009 exhibits rapid rolloff, external filtering is not required. 1.3.4 Monitor Output High impedance output sinks a 1:1 replica of average photodiode current for monitoring purposes. Note that this output is provided because in this device it is not possible to connect the photodiode cathode to Vcc. For the correct operation of the AGC and DC restore, the photodiode cathode must be connected to the PINK pin. The MC2009 measures the photodiode current and uses this information to set the transimpedance and reduce the DCoffset of the outputs. To convert this output to a voltage, a resistor to Vcc should be used. Note that for linearity, ensure that Vmon is always > 1V. |
Số phần tương tự - M02009 |
|
Mô tả tương tự - M02009 |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |