MICRF211
OOK/ASK RF ReceiverThe MICRF211 is a ook/ask rf receiver from Microchip Technology. View the full MICRF211 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Official MICRF211 datasheet (PDF) — the source this page was extracted from.
MICRF211 Key Specifications
| Parameter | Value |
|---|---|
| Data Rate | up to 10kbps |
| Modulation | OOK/ASK |
| RSSI Slope | 25mV/dB |
| IF Bandwidth | 330kHz @ 433.92MHz |
| Image Rejection | 20dB typ |
| Shutdown Current | 0.5uA typ |
| RSSI Output Range | 0.4V to 2V |
| IF Center Frequency | 1.2MHz |
| Operating Frequency | 380MHz to 450MHz |
| Receiver Sensitivity | -110dBm typ (1kbps, BER 10^-2) |
| Supply Voltage (VDD) | 3.0V to 3.6V |
| Operating Temperature | -40°C to +105°C |
| Maximum Input RF Power | -20dBm (operating) |
| Operating Supply Current | 6.0mA typ (continuous, 433.92MHz) |
| Reference Crystal Frequency | 13.52127MHz |
| Demodulator Filter Bandwidth | 1.25kHz to 10kHz (user selectable, 1625Hz to 13000Hz spec range) |
MICRF211 Overview
Part: MICRF211AYQS — Micrel Inc.
Type: OOK/ASK Super-heterodyne RF Receiver (QwikRadio)
Description: 3 V, 433.92 MHz OOK/ASK receiver with -110 dBm typical sensitivity at 1 kbps, image-rejection mixer, and 6.0 mA typical continuous-operation supply current.
Operating Conditions:
- Supply voltage: 3.0–3.6 V
- Operating temperature: -40 to +105 °C
- Frequency range: 380–450 MHz (433.92 MHz characterized); data rates up to 10 kbps (Manchester encoded)
- Maximum input RF power: -20 dBm (operating rating)
Absolute Maximum Ratings:
- Max supply voltage (VDD): 5 V
- Max input voltage: 5 V
- Max junction temperature: 150 °C
- Storage temperature: -65 to +150 °C
- Max receiver input power: +10 dBm
- Lead temperature (soldering, 10 s): 260 °C
- ESD: 2 kV CDM, 200 V HBM, 100 V MM
Key Specs:
- Operating supply current: 6.0 mA typ (continuous operation, fRX = 433.92 MHz)
- Shutdown current: 0.5 μA typ
- Receiver sensitivity: -110 dBm typ (1 kbps, BER 10^-2, matched to 50 Ω, fRX = 433.92 MHz)
- Image rejection: 20 dB typ
- 1st IF center frequency: 1.2 MHz; IF bandwidth: 330 MHz-scaled value of 330 kHz typ at 433.92 MHz
- Demodulator filter bandwidth: 1625–13000 Hz, selectable via SEL0/SEL1
- RSSI: 0.4 to 2 V output range, 25 mV/dB slope (-110 to -40 dBm), 200 Ω output impedance
- Reference oscillator: 13.52127 MHz typ for 433.92 MHz (10 pF crystal load)
- Receive modulation duty cycle: 20–80 %
Features:
- -110 dBm sensitivity at 1 kbps, BER 10^-2
- Image rejection mixer
- Frequency range 380–450 MHz
- Analog RSSI output
- No IF filter required
- Excellent selectivity and noise rejection
- Low external part count (crystal, CTH, CAGC capacitors minimum)
- Four selectable demodulator filter bandwidths
Applications:
Package:
- 16-Pin QSOP
MICRF211 Features
- -110dBm sensitivity, 1kbps and BER 10 -2
- Image rejection mixer
- Frequency from 380MHz to 450MHz
- Low power, 6.0mA @ 433.92MHz, continuous on data rates to 10kbps (Manchester Encoded)
- Analog RSSI output
- No IF filter required
- Excellent selectivity and noise rejection
- Low external part count
MICRF211 Pin Configuration
| 16-Pin QSOP | Pin Name | Pin Function |
|---|---|---|
| 1 | RO1 | Reference resonator input connection to Colpitts oscillator stage. May also be driven by external reference signal of 1.5V p-p amplitude maximum. |
| 2 | GNDRF | Negative supply connection associated with ANT RF input. |
| 3 | ANT | RF signal input from antenna. Internally AC coupled. It is recommended that a matching network with an inductor -to-RF ground is used to improve ESD protection. |
| 4 | GNDRF | Negative supply connection associated with ANT RF input. |
| 5 | VDD | Positive supply connection for all chip functions. |
| 6 | SQ | Squelch control logic input with an active internal pull-up when not shut down. |
| 7 | SEL0 | Logic control input with active internal pull-up. Used in conjunction with SEL1 to control the demodulator low pass filter bandwidth. (See filter table for SEL0 and SEL1 in application section) |
| 8 | SHDN | Shutdown logic control input. Active internal pull-up. |
| 9 | GND | Negative supply connection for all chip functions except RF input. |
| 10 | DO | Demodulated data output. |
| 11 | SEL1 | Logic control input with active internal pull-up. Used in conjunction with SEL0 to control the demodulator low pass filter bandwidth. (See filter table for SEL0 and SEL1 in application section) |
| 12 | CTH | Demodulation threshold voltage integration capacitor connection. Tie an external capacitor across CTH pin and GND to set the settling time for the demodulation data slicing level. Values above 1nF are recommended and should be optimized for data rate and data profile. |
| 13 | CAGC | AGC filter capacitor connection. CAGC capacitor, normally greater than 0.47μF, is connected from this pin to GND |
| 14 | RSSI | Received signal strength indication output. Output is from a buffer with 200Ω typical output impedance. |
| 15 | NC | Not Connected (Connect to Ground) |
| 16 | RO2 | Reference resonator input connection to Colpitts oscillator stage, 7pF, in parallel with low resistance MOS switch-to-GND, during normal operation. Driven by startup excitation circuit during the internal startup control sequence. |
MICRF211AYQS
MICRF211 Electrical Characteristics
Specifications apply for 3.0V < VDD < 3.6V, VSS = 0V, CAGC = 4.7μF, CTH = 0.1μF, fRX = 433.92MHz, unless otherwise noted. Bold values indicate -40°C - TA - 105°C. 1kbps data rate (Manchester encoded), reference oscillator frequency = 13.52127MHz.
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Operating Supply Current | Continuous Operation, f RX = 433.92MHz | 6.0 | mA | ||
| Shut down Current | 0.5 | μA | |||
| Image Rejection | 20 | dB | |||
| 1 st IF Center Frequency | f RX = 433.92MHz | 1.2 | MHz | ||
| Receiver Sensitivity@ 1kbps | f RX = 433.92MHz (matched to 50Ω) BER=10 -2 | -110 | dBm | ||
| IF Bandwidth | f RX = 433.92MHz | 330 | kHz | ||
| Antenna Input Impedance | f RX = 433.92MHz | 19 - j174 | Ω | ||
| Receive Modulation Duty Cycle | Note 5 | 20 | 80 | % | |
| AGC Attack / Decay Ratio | t ATTACK / t DECAY | 0.1 | |||
| AGC pin leakage current | T A = 25°C T A = +105°C | ± 2 ± 800 | nA nA | ||
| AGC Dynamic Range | RF IN @-40dBm | 1.15 | V | ||
| AGC Dynamic Range | RF IN @-100dBm | 1.70 | V | ||
| Reference Oscillator Frequency | f RX = 433.92MHz Crystal Load Cap = 10pF | 13.52127 | MHz | ||
| Reference Oscillator Input Impedance | 300 | kΩ | |||
| Reference Oscillator Input Range | 0.2 | 1.5 | Vp-p | ||
| Reference Oscillator Source Current | V(REFOSC) = 0V | 3.5 | μA |
MICRF211 Absolute Maximum Ratings
| Parameter | Limit |
|---|---|
| Supply Voltage (V DD ) | +5V |
| Input Voltage | +5V |
| Junction Temperature | +150°C |
| Lead Temperature (soldering, 10sec.) | 260°C |
| Storage Temperature (T S ) | -65°C to +150°C |
| Maximum Receiver Input Power | +10dBm |
| ESD Rating (3) | 2kV CDM |
| . | 200V HBM |
................................. 100V Machine Model
MICRF211 Typical Application
433.92 MHz, 1kHz Baud Rate Example
QwikRadio is a registered trademark of Micrel, Inc.
Certain of the QwikRadio ICs were developed under a development agreement with AIT of Orlando, FL.
Micrel Inc. · 2180 Fortune Drive · San Jose, CA 95131 · USA · tel +1 (408) 944-0800 · fax + 1 (408) 474-1000 · http://www.micrel.com
MICRF211 Package Information
Table 10. QR211HE1 Bill of Materials, 433.92 MHz.
MICRF211 Ordering Information
| Part Number | Temperature Range | Package |
|---|---|---|
| MICRF211AYQS | -40°C to +105°C | 16-Pin QSOP |
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| MICRF211AYQS | Microchip | 16-SSOP (0.154", 3.90mm Width) |
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