نقد و بررسی
ADF4116BRUZآی سی PLL ( Phase Locked Loops ) با پارت نامبر ADF4116BRUZ کمپانی آمریکایی Analog Devices ، با ماکزیمم فرکانس کاری 550 مگا هرتز با ولتاژ کاری 2.7 ولت تا 5.5 ولت و پکیج TSSOP-16 می باشد.
PLL یا Phase-Locked Loop (فاز قفل شده کننده مدار) یک سیستم کنترل الکترونیکی است که خروجی فرکانس یا فاز یک اسیلاتور را با فرکانس یا فاز ورودی تنظیم می‌کند.
Clock/Frequency Synthesizer (RF) IC 550MHz 1 16-TSSOP (0.173″, 4.40mm Width)
FEATURES
ADF4116: 550 MHz
ADF4117: 1.2 GHz
ADF4118: 3.0 GHz
2.7 V to 5.5 V power supply
Separate VP allows extended tuning voltage in 3 V systems
Y Grade: −40°C to +125°C
Dual-modulus prescaler
ADF4116: 8/9
ADF4117/ADF4118: 32/33
3-wire serial interface
Digital lock detect
Power-down mode
Fastlock mode
APPLICATIONS
Base stations for wireless radio
(GSM, PCS, DCS, CDMA, WCDMA)
Wireless handsets
(GSM, PCS, DCS, CDMA, WCDMA)
Wireless LANs
Communications test equipment
CATV equipment
GENERAL DESCRIPTION
The ADF411x family of frequency synthesizers can be used to
implement local oscillators (LO) in the upconversion and
downconversion sections of wireless receivers and transmitters.
They consist of a low noise digital phase frequency detector
(PFD), a precision charge pump, a programmable reference
divider, programmable A and B counters, and a dual-modulus
prescaler (P/P + 1). The A (5-bit) and B (13-bit) counters, in
conjunction with the dual-modulus prescaler (P/P + 1),
implement an N divider (N = BP + A). In addition, the 14-bit
reference counter (R counter) allows selectable REFIN frequencies
at the PFD input. A complete phase-locked loop (PLL) can be
implemented if the synthesizer is used with an external loop
filter and voltage controlled oscillator (VCO).
All of the on-chip registers are controlled via a simple 3-wire
interface. The devices operate with a power supply ranging
from 2.7 V to 5.5 V and can be powered down when not in use.
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