U2740B
| Model | U2740B |
| Description | UHF AM/FM Transmitter |
| PDF file | Total 10 pages (File size: 267K) |
| Chip Manufacturer | TEMIC |
U2740B
Electrical Characteristics DC
All voltages referred to GND (Pin 5), V
S
= 2.4 to 5.5 V, T
amb
= –40 to +85°C, unless otherwise specified
Test Conditions / Pins
V
11
= 0, I
16
= 0, V
S
= 3 V
Pin 12
V
11
= 0, I
16
= 0, V
S
= 5.5 V
Pin 12
V
16
= 0 V, V
11
= V
S
Supply current
pp y
(power-up, transmit space) V
16
= 0 V, V
11
= 3 V,
V
S
= 3 V, T
amb
= 25°C,
Pin 12
V
16
= 0 V, V
11
= 5.5 V,
V
S
= 5.5 V, T
amb
= 25°C,
Pin 12
Temperature coefficient of TKI
supply current
1)
Supply current
V
16
= 3 V, V
11
= 3 V,
(power-up, transmit mark) V
S
= 3 V, T
amb
= 25°C,
Pin 12
Power-down voltage
V
16
= 0 V
Pin 11
Power-up voltage
V
16
= 0 V
Pin 11
V
11
= 3 V
Pin 11
Power-up current
p
V
11
= 5.5 V
Pin 11
Input current FM_in
V
6
= 3 V
Pin 6
Output current
Pin 4
Lock-detect
Output current XTO_out
Pin 10
Input current AM_in
2)
R16 = 0 connected to
Pin 16
V
S
= 3 V,
T
amb
= 25°C
T
amb
= 85°C
Notes:
1)
Parameters
Supply current
(p
)
(power-down)
Symbol
I
S OFF
S,
Min.
Typ.
0.05
0.1
Max.
0.25
0.5
8.0
6.5
Unit
m
A
m
A
mA
mA
I
S, ON
I
S, ON
4.5
5.0
5.0
I
S, ON
4.5
5.8
0.18
7.2
mA
%/K
8
V
11, OFF
V
11, ON
I
11 ON
11,
I
6
I
4
I
10
I
16
0.40
0.44
11
13.5
0.4
mA
V
V
1.0
40
110
16
65
150
25
1
1
m
A
m
A
mA
0.50
0.55
0.60
0.65
mA
mA
There are circuit parts with increasing supply current over temperature. The resulting supply current is
IS(T
amb
) = I
SDN
(1 + (T
amb
– 25°C) TKI)
This depends on the value of resistor R16 connected to V
S
. If the supply voltage is 2.0 to 3.5 V, Pin 16 can
be directly connected to V
S
. For V
S
= 5 V, R16 should be 3.9 k
W
.
2)
TELEFUNKEN Semiconductors
Rev. A3, 24-Feb-97
5 (10)
Preliminary Information
Related PDFs
| Model | Description | Manufacturer | Operation |
|---|---|---|---|
 U2740B-BFP
|
UHF AM/FM Transmitter | TEMIC | Preview |
