MICRF007BM Micrel Inc, MICRF007BM Datasheet - Page 8

• Manufacturer Part Number: MICRF007BM
• Description: IC RECEIVER UHF LOW POWER 8SOIC
• Manufacturer: Micrel Inc

Specifications of MICRF007BM

• Frequency: 300MHz ~ 440MHz
• Sensitivity: -96dBm
• Data Rate - Maximum: 2.1 kbps
• Modulation Or Protocol: ASK, OOK
• Applications: RKE
• Current - Receiving: 3mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Features: Automatic Tuning
• Voltage - Supply: 4.75 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Receiving Current: 5.7mA
• Data Rate: 3.2Kbps
• Modulation Type: ASK, OOK
• Frequency Range: 300MHz To 440MHz
• Sensitivity Dbm: -99dBm
• Rf Ic Case Style: SOIC
• No. Of Pins: 8
• Operating Band Frequency: 300 to 440MHz
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 3.94mm
• Product Height (mm): 1.48mm
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Not Compliant

MICRF007
For example, if user desires ∆t = 10ms and chooses a 4.7µF
C
same equation with 200nA, the worst case pin leakage, and
assuming 1µA of capacitor leakage in the same direction,
the maximum allowable ∆t (shutdown time) is about 0.56s
for droop recovery in 10ms.
The ratio of decay-to-attack time-constant is fixed at 1:10
(that is, the attack time constant is 10 times of the delay time
constant). Generally, the design value of 1:10 is adequate for
the vast majority of applications. If adjustment is required,
adding a resistor in parallel of the C
the ratio. The value of the resistor must be determined on a
case by case basis.
Additional Applications Information
In addition to the basic operation of the MICRF007, the fol-
lowing enhancements can be made. In particular, it is strongly
recommended that the antenna impedance is matched to
the input of the IC.
Antenna Impedance Matching
As shown in Figure 2 and Table 3, the antenna pin input
impedance is frequency dependent.
The ANT pin can be matched to 50Ω with a high pass circuit
as shown in Figure 3. That is, a shunt inductor from the
antenna input to ground and a capacitor in series from the
antenna input to the ANT pin.
M9999-021705
AGC
∆V = droop voltage
Figure 2. Impedance Looking into Antenna Pin
, then the allowable droop is about 144mV. Using the
0
–j25
j25
50
AGC
–j100
capacitor may vary
j100
�
8
F
e r
(
M
q
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
Figure 3. Antenna Impedance Matching Network
u
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
0
0
1
1
2
2
3
3
4
H
e
0
5
0
5
0
5
0
5
0
5
0
5
0
5
0
5
0
5
0
5
0
5
0
5
0
5
0
5
0
) z
n
c
y
Table 4. Input Impedance vs. Frequency
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
10
1
8
1
1
1
1
2
3
2
2
2
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
Z
2
2
2
1
–
N I
Z
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
-
-
(
1
Ω
1 j
1 j
1 j
1 j
1 j
1
j1
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
1 j
5
5
1
6
6
)
3
6
6
6
5
5
4
4
4
3
3
3
3
2
2
2
2
2
1
1
1
1
4
3
6
5
5
0
2
7
3
2
0
7
2
8
5
3
9
5
3
0
8
6
4
2
0
8
7
5
4
1
1
L
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SHUNT
7 .
7 .
6 .
6 .
8 .
8 .
7 .
7 .
7 .
7 .
7 .
7 .
7 .
7 .
7 .
7 .
7 .
7 .
7 .
7 .
6 .
6 .
6 .
6 .
6 .
6 .
6 .
7 .
7 .
0
0
9
9
8
8
7
7
6
6
5
4
4
3
3
2
1
0
9
8
7
6
5
5
4
3
3
1
0
C
3
0
6
1
9
2
8
0
7
2
3
8
2
5
2
5
8
7
2
4
5
7
8
3
3
8
5
1
0
S
–
–
–
–
–
–
–
–
–
–
–
–
–
SERIES
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1
1
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
0 j
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
5 .
6 .
6 .
6 .
6 .
6 .
6 .
6 .
6 .
6 .
6 .
6 .
6 .
6 .
7 .
6 .
6 .
6
3
8
0
2
3
3
3
4
5
5
7
7
8
9
9
0
1
1
2
4
5
6
6
7
7
8
3
4
9
0
6
6
3
0
6
4
2
8
6
2
7
3
9
5
4
7
3
0
7
3
7
4
7
4
1
1
C
SERIES
ANT Pin
1.5
1.4
1.6
1.5
1.4
1.7
1.5
1.4
1.6
1.5
1.4
1.6
1.5
1.4
1.3
1.6
1.4
1.3
1.2
1.5
1.4
1.2
1.5
1.4
1.3
1.6
1.5
1.4
1.2
(pF)
February 17, 2005
L
SHUNT
62
62
56
56
56
51
51
51
47
47
47
43
43
43
43
39
39
39
39
36
36
36
33
33
33
30
30
30
30
(nH)
Micrel