Electronic Datasheet Downloads

Filename	Description	Size
AD8307 1KHz-500MHz RF Wattmeter	The AD8307 is the first logarithmic amplifier made available in an 8-lead (SOIC_N) package. It is a complete 500 MHz monolithic demodulating logarithmic amplifier based on the progressive compression (successive detection) technique, providing a dynamic range of 92 dB to ±3 dB law-conformance and 88 dB to a tight ±1 dB error bound at all frequencies up to 100 MHz. It is extremely stable and easy to use, requiring no significant external components. A single-supply voltage of 2.7 V to 5.5 V at 7.5 mA is needed, corresponding to an unprecedented power consumption of only 22.5 mW at 3 V. A fast acting CMOS-compatible control pin can disable the AD8307 to a standby current of less than 150 µA. Each of the cascaded amplifier/limiter cells has a small signal gain of 14.3 dB, with a -3 dB bandwidth of 900 MHz. The input is fully differential and at a moderately high impedance (1.1 kΩ in parallel with about 1.4 pF). The AD8307 provides a basic dynamic range extending from approximately -75 dBm (where dBm refers to a 50 Ω source, that is, a sine amplitude of about ±56 µV) up to +17 dBm (a sine amplitude of ±2.2 V). A simple input matching network can lower this range to -88 dBm to +3 dBm. The logarithmic linearity is typically within ±0.3 dB up to 100 MHz over the central portion of this range, and degrades only slightly at 500 MHz. There is no minimum frequency limit. The AD8307 can be used at audio frequencies of 20 Hz or lower. The output is a voltage scaled 25 mV/dB, generated by a current of nominally 2 μA/dB through an internal 12.5 kΩ resistor. This voltage varies from 0.25 V at an input of −74 dBm (that is, the ac intercept is at −84 dBm, a 20 μV rms sine input), up to 2.5 V for an input of +16 dBm. This slope and intercept can be trimmed using external adjustments. Using a 2.7 V supply, the output scaling can be lowered, for example to 15 mV/dB, to permit utilization of the full dynamic range. The AD8307 exhibits excellent supply insensitivity and temperature stability of the scaling parameters. The unique combination of low cost, small size, low power consumption, high accuracy and stability, very high dynamic range, and a frequency range encompassing audio through IF to UHF makes this product useful in numerous applications requiring the reduction of a signal to its decibel equivalent. The AD8307 operates over the industrial temperature range of -40°C to +85°C, and is available in 8-lead SOIC and PDIP packages.	405K
BA1404	HI-FI FM Stereo Transmitter (1.5-3V, 76-108MHz, Separation 45dB, DIP18).	472K
BH1414	PLL FM Stereo Transmitter used for broadcasting FM signal on the air (4.5-5.5V, 76-108MHz, Separation 45dB, QFP44).	174K
BH1414 b	PLL FM Stereo Transmitter used for broadcasting FM signal on the air (4.5-5.5V, 76-108MHz, Separation 45dB, QFP44).	98K
BH1414K	PLL FM Stereo Transmitter used for broadcasting FM signal on the air. Transmitter offers high S/N ration and frequency is set with a PIC microcontroller or a PC (4.5-5.5V, 76-108MHz, Separation 45dB, QFP44).	326K
BH1415	PLL FM Stereo Transmitter. Frequency is set with a PIC microcontroller or a PC (4-6V, 76-108MHz, Separation 40dB, SOP22).	206K
BH1416	FM Transmitter with built-in stereo encoder and PLL circuit (4-6V, 76.8-78MHz 88 - 89.2MHz - 200kHz steps, Separation 40dB, SOP22).	202K
BH1417	FM Transmitter with built-in pre-emphasis circuit, limiter circuit, low-pass filter circuit, stereo encoder and PLL frequency tuning system (4-6V, 87.7-88.9MHz 106.7-107.9MHz - 200kHz steps, Separation 40dB, SOP22).	192K
BH1418	PLL FM Stereo Transmitter used for broadcasting FM signal on the air (2.7-4V, 70-120MHz, Separation 40dB, SSOP-B24).	210K
MAX2605	45 MHz to 650 MHz low noise, low power FM Transmitter.	315K
MAX2606	Compact, high-performance 45MHz to 650MHz FM Transmitter with built-in voltage-controlled oscillator and integrated varactor.	315K
MC2833	One chip, Low Power FM transmitter subsystem designed for cordless telephone and FM communication equipment. It includes a microphone amplifier, voltage controlled oscillator and two auxiliary transistors.	395K

FM Transmitters