U2794 TEMIC Semiconductors, U2794 Datasheet - Page 4

• Manufacturer Part Number: U2794
• Description: 1000 MHz Quadrature Demodulator
• Manufacturer: TEMIC Semiconductors

Electrical Characteristics
Test conditions (unless otherwise specified); V
System impedance Z
Note 5: Due to test board parasitics this bandwidth is reduced and not equal for I, IX, Q, QX.
Note 6: Output emitter follower internal acurrent I = 0.6 mA allows only small voltage swing with a 50
Note 7: Referred to the level of the output vector I
Note 8: The low gain status is achieved with an open or high ohmic Pin 11. A recommended application circuit for
U2794B
4 (11)
I/O outputs
3 dB-bandwidth
w/o external C
I/Q amplitude
imbalance
I/Q quadrature error
I/Q maximum output
swing
DC output voltage
DC output offset voltage Note 6
Output impedance
Gain control, GC
Control range power
gain, gain high/gain low
Switch voltage
“Gain high”
“Gain low”
Settling time, ST
Power “OFF ” – “ON ”
Power “ON ” – “OFF ”
Parameters
If symmetry and full bandwidth is required the lowpass Pins 3, 4 and 9, 10 should be isolated from the board.
The bandwidth of the I/Q outputs can be increased further by using a resistor between the Pins 3, 4, 9 and 10.
This resistors shunt the internal loads of RI
For low signal distortion the load impedance should be RI 5 k
switching between high and low gain status is shown in figure 1.
O
= 50
Emitter follower
I = 0.6 mA
Note 5
Symm. output R
see figure 6
Note 7
Note 8
W
, fiLO = 950 MHz, PiLO = –10 dBm
Test Conditions / Pins
Pins 1, 2, 19 and 20
Pins 1, 2, 19 and 20
Pins 1, 2, 19 and 20
Pins 1, 2, 19 and 20
Pins 1, 2, 19 and 20
Pins 1, 2, 19 and 20
Pins 1, 2, 19 and 20
Pin 11
Pin 11
Pin 11
L
> 5 k
S
= 5 V, T
W

2
)
5.4 k
amb
Q
2
PGH/GGL
W
GCVHigh
= 25 C, referred to test circuit
GCVLow
VOFSI/Q
.
I, IX / Q,
Max I/Q
Symbol
BWI/Q
STOFF
VOUT
QEI/Q
STON
AII/Q
Q/QX
The decrease in gain here has to be considered.
GCR
Zout
I/IX
QX
W
Min.
30
TELEFUNKEN Semiconductors
23/–2
Typ.
2.8
< 5
< 4
< 4
50
25
0.2
1.5
Rev. A3: 23.08.1995
Max.
2
1
W
load.
MHz
Unit
Deg
V
mV
dB
dB
m
m
V
W
V
V
PP
s
s