U2791B Datasheet, PDF (4/11 Pages) TEMIC Semiconductors – 1000 MHz Quadrature Demodulator

U2791B
TELEFUNKEN Semiconductors
Electrical Characteristics
Test conditions (unless otherwise specified); V_S = 5 V, T_amb = 25°C, referred to test circuit
System impedance Z_O = 50 W, fiLO = 950 MHz, PiLO = –10 dBm
Parameters
Test Conditions / Pins
Symbol Min.
I/O outputs
Emitter follower
I = 0.6 mA
I, IX / Q,
QX
3-dB bandwidth
w/o external C
Note 5
Pins 1, 2, 19 and 20
BWI/Q
≥ 30
I/Q amplitude
imbalance
Pins 1, 2, 19 and 20
AII/Q
I/Q quadrature error
Pins 1, 2, 19 and 20
QEI/Q
I/Q maximum output
swing
DC output voltage
Pins 1, 2, 19 and 20
Symm. output R_L > 5 kW
Pins 1, 2, 19 and 20
Max I/Q
VOUT
DC output offset voltage Note 6 Pins 1, 2, 19 and 20
VOFSI/Q
I/IX
Q/QX
Output impedance
Pins 1, 2, 19 and 20
Zout
see figure 6
Gain control, GC
Control range power Note 7
gain, gain high/gain low
Pin 11
GCR
PGH/GGL
Switch voltage
“Gain high”
Pin 11
GCVHigh
“Gain low”
Note 8
Pin 11
GCVLow
Settling time, ST
Power “OFF ” – “ON ”
STON
Power “ON ” – “OFF ”
STOFF
Typ. Max.
≤ ±0.2
≤ ±1.5
2
2.8
≤ 30
50
25
23/–2
1
<4
<4
Unit
MHz
dB
Deg
V_PP
V
mV
W
dB
V
V
ms
ms
Note 5: Due to test board parasitics this bandwidth is reduced and not equal for I, IX, Q, QX.
If symmetry and full bandwidth is required the low-pass Pins 3, 4, 9 and 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 5.4 kW The decrease in gain here has to be considered.
Note 6: Output emitter follower internal acurrent I = 0.6 mA allows only small voltage swing with a 50 W load.
Ǹ ₎ ^{For low signal distortion the load impedance should be RI ≥ 5 kW.}
Note 7: Referred to the level of the output vector I² Q².
Note 8: The low gain status is achieved with an open or high ohmic Pin 11. A recommended application circuit for
switching between high and low gain status is shown in figure 1.
4 (11)
Rev. A2: 08.06.1995