MICRF221 datasheet(3/26 Pages) MICREL

3 / 26 page

Micrel Inc.

MICRF221

October 2008

M9999-100108

(408) 955-1690

Absolute Maximum Ratings(1)

Supply Voltage (Vdd) ................................................. +5V

Input Voltage. ............................................................. +5V

Junction Temperature ...........................................+150ºC

Lead Temperature (soldering, 10sec.) ....................300°C

Storage Temperature (Ts)...................... -65ºC to +150°C

Maximum Receiver Input Power ......................... +10dBm

EDS Rating

(3).....................................................2KV HBM

Operating Ratings(2)

Supply voltage (Vdd)............................. +3.0V to +3.6V

Ambient Temperature (TA) ................. –40°C to +105°C

Input Voltage (Vin) ................................................. 3.6V

Maximum Input RF Power.................................-20dBm

Receive Modulation Duty Cycle

(6) .................... 20~80%

Electrical Characteristics

Specifications apply for VDD=3.3V, VSS = 0V, CAGC = 4.7uF, CTH = 0.1uF, fRX = 850 MHz to 950 MHz unless otherwise noted.

Bold values indicate –40°C - TA - 105°C.

Symbol

Parameter

Condition

Min

Typ

Max

Units

Continuous Operation, fRX = 868 MHz

9.0

Iss

MICRF221 Operating

Supply Current

Continuous Operation, fRX = 915 MHz

9.5

Ishut

Shut down Current

RF/IF Section

Symbol

Parameter

Condition

Min

Typ

Max

Units

Image Rejection

fRX = 868 MHz

1.219

st IF Center Frequency

fRX = 915 MHz

1.285

MHz

fRX = 868 MHz (matched to 50Ω)

-109

Receiver Sensitivity @

1kbps

(4)

fRX = 915 MHz (matched to 50Ω)

-109

dBm

fRX = 868 MHz

360

IF Bandwidth

fRX = 915 MHz

380

kHz

fRX = 868 MHz

9.4 – j72

Antenna Input

Impedance

fRX = 915 MHz

9 – j67

Ω

Receive Modulation Duty

Cycle

Note 6

Spurious Reverse

Isolation

(5)

ANT pin, RSC = 50 Ω

-78

dBm

AGC Attack / Decay

Ratio

tATTACK / tDECAY

0.1

TA = 25ºC

+/-2

AGC pin leakage current

TA = +105ºC

+/-800

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