ECF800 E-CMOS | Alldatasheet

Document overview

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Technical content

Features

  • No IF Filter used
  • +3V to +5.5V Single-Supply Operation
  • Support data rate up to 10kbps
  • > 25dB Image-Rejection
  • -110dBm sensitivity at 2kbps
  • ~ 1uA Shutdown Current
  • 75dB RSSI output
  • 32-Pin QFN Package
  • Highly Integrated include PLL, VCO, Loop Filter, Mixer and Baseband
  • -40℃ ~ 125℃ Wide Temperature range GENERAL DESCRIPTION The E CF800 is a 315Mhz/433.92MHz low -IF RF receiver with automatic gain control and OOK/ASK demodulator. The ECF800 requires few external components and makes it ideal for cost -sensitive applications. The low-noise amplifier (LNA), phase -lock loop (PLL), mixer, IF filter, received -signal strength indicator (RSSI), and baseband section are included all on -chip. The low -drop output (LDO) regulators are also on-chip which can allow 3V to 5.5V power supp ly range and consumes 10mA of supply current, especially of operation is allowed -40℃ to 125 ℃ wide Temperature Range. The ECF800 achieves -110dBm sensitivity at a data rate of 2Kbps and -25dBm maximum allowed input power. ECF800 is designed as Receiver SOC for remote controller in home -use consumer product, usually applied to LED lighting control, smart Switch and Fan control systems. E-CMOS’s advance technology delivers small, reliable, very low power consumption, green and cost-effective keyboard remote c ontrol system solution. This provides a green solution to environment pollution and global warming and let your company become a green solution provider.

315/433MHz OOK/ASK Receiver SOC for Home Automation ECF800 ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

AC Electrical Characteristics (Ta =25℃, VIN =5V, VSS = 0V) Parameter Symbol Conditions Max storage temperature TSTOREmax +150℃ Min storage temperature TSTOREmin -60℃ Power supply voltage VIN -0.1V to +5.5V Electrostatic discharge VESD 1KV Parameter Condition Min. Typ. Max. Unit Receiver Sensitivity fRX=315MHz, 2Kbp -110 -115 dBm fRX=433.92MHz, 2Kbps -110 -115 dBm Image Rejection 25 dB LO Signal Leakage to RF port -80 dBm Valid data Out settling time Shutdown to enable & C=1nF 3.5 ms Shutdown to enable & C=10nF 17 ms IF Bandwidth 300 KHz Maximum Receive Input Power Continuous wave signal -25 dBm Reference OSC Frequency fRX=315MHz 19.66825 MHz fRX=433.92MHz 13.5475 MHz RSSI Range With AGC ON 75 dB Data rate 2 8 Kb/s

315/433MHz OOK/ASK Receiver SOC for Home Automation ECF800 DC Electrical Characteristics (VIN =3V to 5.5V, VSS= 0V) Recommend Operating Conditions Function block diagram Parameter Condition Min. Typ. Max. Unit Supply Voltage 3 - 5.5 V Operation Supply Current Conti-Operation, fRX=315MHz 11 mA Conti-Operation, fRX=433.92MHz 12 mA Power save current CE=low , receiver power off command 4 mA Shut-down Current CE=Low 1 uA Output High current VDD- 0.1* VDD 400 uA Output low current 0.1*VDD 800 uA Operation T emp Range -40 125 ℃ Parameter Symbol Min. Typ. Max. Unit Power Supply voltage VIN 5 V Operating Temperature Ta -10 - +65 ℃

315/433MHz OOK/ASK Receiver SOC for Home Automation ECF800 Function description The ECF800 CMOS RF SOIC receiver, and a fe w external components, provides the complete receiver chain from the antenna to the interfa ce data, which are IR, PWM, UART and ON/OFF.It can work FAVEPC’s RFID RC air interface protocol.The ECF800 is designed to receive binary ASK/OOK data modulated in the 315/433.92MHz.ASK modulation uses a difference in amplitude of the carrier to represent digital data ->Voltage Regulator ECF800 provides two internal voltage regulators to the whole receiver SOIC blocks. The regulator input pin is VCC5. ->RF Front-end (LNA & Mixer) The signal is received and amplified by RFfront -end.The LNA and mixer have achieved voltage gain and excellent reversed isolation at LNA input port. The gain and noise figure are dependent on both the antenna matching network at the LNA input and LC tank network between the LNA output and the mixer inputs. The ANT pin can be matched to 50 Ohms with L -type circuit as shown on application circuit. Inductor and capacitor values may be different from table depend on PCB material, PCB thickness, ground configuration, how long the trace are in the layout and also different application frequency. ->Phase-locked Loop (PLL) The PLL block contains a phase detector, charge pump, integrated loop filter, VCO, asynchronous clock dividers, and crystal-oscillator driver. Beside the crystal and its loaded capacitors, this PLL does not require any external components. ->Image-rejection Filter and Band-Pass Filter The IF ports of the mixer produce quadrature-down converted IF signals. These IF signals are low-pass filtered to remove higher frequency products prior to the image rejection filter where they are combined to reject the image frequency. The filter is fully integrated inside the ECF800 and IF bandwidth is 300 KHz. ->Received-signal Strength Indictor (RSSI) The RSSI circuit provides a DC output proportional to the logarithm of the input power level. RSSI output voltage has a slope of about 18mV/dB (of input power). The RSSI monotonic dynamic range exceeds 75dB. The OOK/ASK demodulation is done by comparing the RSSI signal level. ->Automatic Gain Control (AGC) The AGC circuit monitors the RSSI output. Receiver Font End (FE) would switch to low gain mode when RSSI indicate the receipted power higher than a power threshold. Low receiver FE gain can improve circuit’s linearity for RF high power input. ->Data Filter The data filter is implemented by 2nd order Sallen-key low-pass filter. This filter is fully integrated in ECF800 and no external components needed.

315/433MHz OOK/ASK Receiver SOC for Home Automation ECF800 Interface output specification A. IR output ->NEC protocol ->RC6 protocol

315/433MHz OOK/ASK Receiver SOC for Home Automation ECF800 ->RC5 protocol B. UART protocol ->Transmission Format

315/433MHz OOK/ASK Receiver SOC for Home Automation ECF800 ->UART Parameter ▓Driving level: 3.3V /5 V ▓Baud Rate: 9600 (default) ±1% ▓Data Bits: 8 bit ▓Stop Bits: 1 bit ▓Parity Bit: none C. PWM protocol ->PWM Parameter ▓PWM frequency: 1KHz ▓PWM Step: up to 225 step; can be set to 10/20/30/45/60/75/90/225 ▓Support 3 PWM output maximum

315/433MHz OOK/ASK Receiver SOC for Home Automation ECF800 Mechanical Characteristics QFN 32 package information