U2794B Datasheet, PDF (4/15 Pages) TEMIC Semiconductors – 1000 MHz Quadrature Demodulator

Absolute Maximum Ratings
Parameters
Supply voltage
Input voltage
Junction temperature
Storage-temperature range
Symbol
V_S
V_i
T_j
T_stg
Value
6
0 to V_S
+125
-40 to +125
Unit
V
V
°C
°C
Thermal Resistance
Parameters
Junction ambient SSO20
Symbol
R_thJA
Value
140
Unit
K/W
Operating Range
Parameters
Supply-voltage range
Ambient-temperature range
Symbol
V_S
T_amb
Value
4.75 to 5.25
-40 to +85
Unit
V
°C
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
No. Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
1.1
Supply-voltage range
1.2
Supply current
2
Power-down Mode
5, 6
V_S
4.75
5, 6
I_S
22
30
2.1
“OFF” mode supply V_PU £ 0.5 V
14, 5
I_SPU
£1
current
V_PU = 1.0 V
6
20
(1)
Max.
5.25
35
Unit Type*
V
A
mA
A
µA
B
µA
D
3
Switch Voltage
3.1
“Power ON”
14
V_PON
4
V
D
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Notes:
1. During power-down status a load circuitry with DC-isolation to GND is assumed, otherwise a current of I » (VS -0.8 V)/RI
has to be added to the above power-down current for each output I, IX, Q, QX.
2. The required LO-Level is a function of the LO frequency (see Figure 8).
3. Measured with input matching. For 950 MHz, the optional transmission line T3 at the RF input may be used for this pur-
pose. Noise figure measurements without using the differential output signal result in a worse noise figure.
4. Using Pins 7 and 8 as a symmetric RF input, the second-order IIP can be improved.
5. Due to test board parasitics, this bandwidth may be reduced and not be equal for I, IX, Q, QX. If symmetry and full band-
width 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 Pins 3, 4, 9 and 10. These resistors shunt the internal loads of
RI ~ 5.4 kW. The decrease in gain here has to be considered.
6. The internal current of the output emitter followers is 0.6 mA. This reduces the undistorted output voltage swing at a 50 W
load to approsimately 30 mV. For low signal distortion the load impedance should be RI ³ 5 kW.
7. Referred to the level of the output vector I² + Q²
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 hown in Figure 3.
4 U2794B
4653C–CELL–06/03