ALD212908APAL datasheet(9/12 Pages) ALD

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ALD212908A/ALD212908

Advanced Linear Devices

9 of 12

DIFFERENTIAL AMPLIFIER

CURRENT SOURCE MULTIPLICATION

CURRENT SOURCE MIRROR

CURRENT SOURCE WITH GATE CONTROL

TYPICAL APPLICATIONS

ISET

RSET

V+ = +5V

ISOURCE

M1, M2: N - Channel MOSFET

M3, M4: P - Channel MOSFET

V+ = +5V

M3, M4:

ALD1102,

ALD1117,

1/2 ALD1103,

1/2 ALD1105,

1/2 ALD1107, or

1/2 ALD3107xx

M1, M2:

ALD1101,

ALD1116,

ALD1109xx,

ALD2129xx,

1/2 ALD1103,

1/2 ALD1105,

1/2 ALD1106,

1/2 ALD1108xx, or

1/2 ALD2108xx

RSOURCE

ISOURCE = ISET =

V+ - Vt

RSET

where Vt = VGS - VGS(th) = VDS

V+ = +5V

ISOURCE

RSET

ISET

OFF

Digital Logic Control

of Current Source

: N - Channel MOSFET

M3, M4 : P - Channel MOSFET

RSOURCE

M1:

1/2 ALD1101,

1/2 ALD1116,

1/2 ALD1109xx,

1/2 ALD2129xx,

1/4 ALD1103,

1/4 ALD1105,

1/4 ALD1106,

1/4 ALD1108xx, or

1/4 ALD2108xx

M3, M4:

ALD1102,

ALD1117,

1/2 ALD1103,

1/2 ALD1105,

1/2 ALD1107, or

1/2 ALD3107xx

V+

PMOS PAIR

VOUT

VIN-

NMOS PAIR

VIN+

Current

Source

M1, M2: N - Channel MOSFET

M3, M4: P - Channel MOSFET

M3, M4:

ALD1102,

ALD1117,

1/2 ALD1103,

1/2 ALD1105,

1/2 ALD1107, or

1/2 ALD3107xx

M1, M2:

ALD1101,

ALD1116,

ALD1109xx,

ALD2129xx,

1/2 ALD1103,

1/2 ALD1105,

1/2 ALD1106,

1/2 ALD1108xx, or

1/2 ALD2108xx

MSET, M1..MN: N - Channel MOSFET

ISET

V+ = +5V

ISOURCE = ISET x N

RSET

MSET

Package 1

Package N

MSET, M1..MN:

N x ALD1101, N x ALD1116,

N x ALD1109xx, N x ALD2129xx,

N x ALD1103, N x ALD1106,

N x ALD1108xx, or

N x ALD2108xx

All M's in the set are

from the same part number.

V+ = +5V

RSOURCE

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