ALD212908ASAL datasheet(10/12 Pages) ALD

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ALD212908A/ALD212908

Advanced Linear Devices

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CASCODE CURRENT SOURCES

BASIC CURRENT SOURCES

P- CHANNEL CURRENT SOURCE

N- CHANNEL CURRENT SOURCE

TYPICAL APPLICATIONS (cont.)

ISET

V+ = +5V

ISOURCE

RSET

M1, M2, M3, M4: N - Channel MOSFET

where M1 and M2 is a matched pair

and M3 and M4 is a second matched pair.

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

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

ISOURCE

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

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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