U2741B-MFB Atmel, U2741B-MFB Datasheet - Page 5

• Manufacturer Part Number: U2741B-MFB
• Manufacturer: Atmel

Specifications of U2741B-MFB

• Operating Frequency (max): 450000kHz
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / Rohs Status: Not Compliant

Electrical Characteristics
All parameters are refered to GND (Pin 5).
The possible operating ranges refer to different circuit conditions:
V
Rev. A2, 22-Dec-00
Supply current (power down) V
Supply current
(power up, output OFF)
Supply current
(power up, output ON)
Output power
Output power variation for
the full temperature range
Output power variation for
f = 315 MHz compared to
f = 433.92 MHz
Maximum peak output
antenna voltage
Spurious emission
Oscillator frequency XTO
Loop bandwidth
Phase noise PLL
Phase noise VCO
Frequency range of the VCO
Clock output
(CMOS C compatible)
S
= 2.0 V to 5.5 V @ T
Parameters
amb
V
V
R
V
f = 433.92 MHz
R
R
T
f = 433.92 MHz, V
T
f = 433.92 MHz, V
P
f = 315 MHz
P
@
The load impedance must be selected
to meet the V
The supply current is not dependent on
the load impedance tolerance.
@ T
f
Load capacitance at CLK 3 pF
f = 230 MHz to 470 MHz
f < 230 MHz, f > 470 MHz
M-version: @ T
N-version: full temperature range
(monitoring)
Crystal frequency = 13.56 MHz
load capacity of the crystal must be
selected accordingly
For best LO noise
Loop filter components:
C2 = 3.9 nF, C1 = 15 nF, R4 = 220 W
Referring to the phase comparator
f
@ 1 MHz
@ 36 MHz
= –20 C to +70 C, V
o
PC
ASK
ASK
ASK
PWRSET
PWRSET
PWRSET
amb
amb
out
out
S
P
= 3 V, T
= 6.78 MHz
out
amb
n f
= P
= P
, V
= GND, V
= V
= –40 C to +85 C,
= –20 C to +85 C,
= 2.0 mW,
Test Conditions / Pins
= 25 C
FSK
Ref
Ref
PC
S
= 1.2 kW
= 1.2 kW
= 1.8 kW
, V
amb
(f
out
v 0.3 V, V
+
+
PC
S
DP
DP
= 25 C,
maximum requirement.
= 3 V
amb
FSK
= 6.78 MHz)
Ref
Ref
V
= 25 C
6.78 MHz
= V
S
S
S
= 3.0 V
= 2.4 V
= 2.0 V
S
S
S
< 3.6 V
, V
= 2.2 V to 5.5 V @ T
s
= 3 V
IS
Symbol
V
PN
PN
PN
DP
DP
DP
DP
Clk
B
f
f
f
IS
outmax
IS
transmit
P
P
Em
Em
VCO
XTO
XTO
Loop
Ref
Ref
VCO
VCO
PLL
off
on
Ref
Ref
Ref
Ref
out
amb
– 30 ppm
–30 ppm
13.56
Min.
–0.5
6.78
= –40 C to +85 C (Typ. 25 C, 3 V)
300
1.5
V
f
S
out
13.56
–111
–123
Typ.
6.78
– 0.7 V
100
–91
4.7
1.5
10
3
1
/128
U2741B
+30 ppm
+30 ppm
13.56
Max.
–105
–119
0.35
12.5
–1.5
–4.0
–5.5
6.78
–40
–58
–87
450
6.2
5
3
dBC/Hz
dBC/Hz
V
MHz
MHz
MHz
MHz
dBm
dBm
Unit
dBC
dBC
kHz
mA
mA
(peak)
dB
dB
dB
dB
5 (7)
A