
Micrel, Inc.
Electrical Characteristics (4) (Continued)
V DD = 3.3V, V SHDN = 0V, SQ = open, C CAGC = 4.7μF, C CTH = 0.1μF, unless otherwise noted. Bold values indicate
–40°C ≤ T A ≤ 105°C. “Bit rate” refers to the encoded bit rate throughout this datasheet (see Note 4).
MICRF219A
Parameter
Condition
Min.
Typ.
Max.
Units
Demodulator
CTH Source Impedance, Note 6
CTH Leakage Current In CTH Hold
Mode
f REF = 9.81713MHz
f REF = 13.52313MHz
T A = +25oC
T A = +105oC
165
120
1
10
k ?
nA
Digital / Control Functions
DO Pin Output Current
Output Rise Time
Output Fall Time
Input High Voltage
Input Low Voltage
Output Voltage High
Output Voltage Low
As output source @ 0.8V DD
As output sink @ 0.2V DD
15pF load on DO pin, transition time between
0.1V DD and 0.9V DD
SHDN, SQ
SHDN, SQ
DO
DO
0.8V DD
0.8V DD
300
680
600
200
0.2V DD
0.2V DD
μA
ns
V
V
V
V
RSSI
RSSI DC Output Voltage Range
RSSI Output Current
RSSI Output Impedance
RSSI Response Time
? 110dBm RF input level
? 50dBm RF input level
5k Ω load to GND, ? 50dBm RF input level
D[4:3] = 00, RF input power stepped from no
input to ? 50dBm
0.5
2.0
400
250
10
V
μA
?
ms
Notes:
1.
2.
3.
4.
5.
6.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside of its operating rating.
Device is ESD sensitive. Use appropriate ESD precautions. Exceeding the absolute maximum rating may damage the device.
Encoded bit rate is 1/(shortest pulse duration) that appears at MICRF219A DO pin:
In an ON/OFF keyed (OOK) signal, the signal level goes between a “mark” level (when the RF signal is ON) and a “space” level (when the RF
signal is OFF). Sensitivity is defined as the input signal level when “ON” necessary to achieve a specified BER (bit error rate). BER measured with
the built-in BERT function in Agilent E4432B using PN9 sequence. Sensitivity measurement values are obtained using an input matching network
corresponding to 315MHz or 433.92MHz.
CTH source impedance is inversely proportional to the reference frequency. In production test, the typical source impedance value is verified with
12MHz reference frequency.
July 2011
5
M9999-071811-A
RadioTech@micrel.com or (408) 944-0800