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ALD210808 Datasheet(PDF) 10 Page - Advanced Linear Devices |
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ALD210808 Datasheet(HTML) 10 Page - Advanced Linear Devices |
10 / 12 page ALD210808A/ALD210808 Advanced Linear Devices 10 of 12 CASCODE CURRENT SOURCES BASIC CURRENT SOURCES P- CHANNEL CURRENT SOURCE N- CHANNEL CURRENT SOURCE TYPICAL APPLICATIONS (cont.) ISET V+ = +5V M2 ISOURCE RSET M3 M1 M1, M2, M3, M4: N - Channel MOSFET where M1 and M2 is a matched pair and M3 and M4 is a second matched pair. M4 M1, M2: ALD1101, ALD1116, ALD2129xx, 1/2 ALD1103, 1/2 ALD1105, 1/2 ALD1106, or 1/2 ALD2108xx V+ = +5V RSOURCE M3, M4: ALD1101, ALD1116, 1/2 ALD1103, 1/2 ALD1105, 1/2 ALD1106, or 1/2 ALD2108xx ISOURCE V+ = +5V RSET ISET 1 2 3 M1 5 6 8 M2 7 M1, M2 :N - Channel MOSFET V+ = +5V RSOURCE M1, M2: ALD1101, ALD1116, ALD1109xx, ALD2129xx, 1/2 ALD1103, 1/2 ALD1105, 1/2 ALD1106, 1/2 ALD1108xx, or 1/2 ALD2108xx ISOURCE = ISET = V+ - Vt RSET where Vt = VGS - VGS(th) = VDS V+ = +5V 2 3 5 6 7 8 M4 ISOURCE M3 RSET ISET M3, M4: P - Channel MOSFET RSOURCE M3, M4: ALD1102, ALD1117, 1/2 ALD1103, 1/2 ALD1105, 1/2 ALD1107, or 1/2 ALD3107xx ISET V+ = +5V M1 M3 M2 M4 ISOURCE RSET M1, M2, M3, M4: P - Channel MOSFET where M1 and M2 is a matched pair and M3 and M4 is a second matched pair. ISOURCE = ISET = V+ - 2Vt RSET where Vt = VGS - VGS(th) = VDS RSOURCE M1, M2: ALD1102, ALD1117, 1/2 ALD1103, 1/2 ALD1105, 1/2 ALD1107, or 1/2 ALD3107xx M3, M4: ALD1102, ALD1117, 1/2 ALD1103, 1/2 ALD1105, 1/2 ALD1107, or 1/2 ALD3107xx |
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