MAT04FSZ Analog Devices Inc, MAT04FSZ Datasheet - Page 6

• Manufacturer Part Number: MAT04FSZ
• Description: IC TX MATCHED MONO QUAD 14-SOIC
• Manufacturer: Analog Devices Inc

Specifications of MAT04FSZ

• Transistor Type: 4 NPN (Quad)
• Current - Collector (ic) (max): 30mA
• Voltage - Collector Emitter Breakdown (max): 40V
• Vce Saturation (max) @ Ib, Ic: 60mV @ 100µA, 1mA
• Current - Collector Cutoff (max): 5nA
• Power - Max: 350mW
• Frequency - Transition: 300MHz
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Dc Current Gain (hfe) (min) @ Ic, Vce: -

MAT04
APPLICATION NOTES
It is recommended that one of the substrate pins (Pins 4 and 11)
be tied to the most negative circuit potential to minimize cou-
pling between devices. Pins 4 and 11 are internally connected.
APPLICATIONS
CURRENT SOURCES
The MAT04 can be used to implement a variety of high imped-
ance current mirrors as shown in Figures 1, 2, and 3. These
current mirrors can be used as biasing elements and load de-
vices for amplifier stages.
The unity-gain current mirror of Figure 1 has an accuracy of
better than 1% and an output impedance of over 100 MΩ at
100 µA. Figures 2 and 3 show modified current mirrors de-
signed for a current gain of two, and one-half respectively. The
accuracy of these mirrors is reduced from that of the unity-gain
source due to base current errors but is still better than 2%.
Figure 4 is a temperature independent current sink that has an
accuracy of better than 1% at an output current of 100 µA to 1
mA. The Schottky diode acts as a clamp to ensure correct cir-
cuit start-up at power on. The resistors used in this circuit
should be 1% metal-film type.