TM
A
L
D
DVANCED
INEAR
EVICES, INC.
®
e
EPAD
A
ALD1108E/ALD1110E
QUAD/DUAL ELECTRICALLY PROGRAMMABLE ANALOG DEVICE (EPAD™)
GENERAL DESCRIPTION
BENEFITS
ALD1108E/ALD1110E are monolithic quad/dual EPAD® (Electrically
Programmable Analog Device) N-channel MOSFETs with electrically
adjustable threshold (turn-on) voltage. The ALD1108E/ALD1110E are
matched and adjusted (e-trimmed) at the factory resulting in quad/dual
MOSFETsthatarehighlymatchedinthresholdvoltagesandotherelectrical
characteristics. For a given input voltage, the threshold voltage of a
MOSFET device determines its drain on-current, resulting in an on-
resistancecharacteristicthatcanbepreciselypresetandthencontrolledby
the input voltage very accurately.
• Precision matched electrically after
packaging
• Simple, elegant single-chip user option
to trim voltage/current values
• Excellent device matching characteristics
with or without additional electrical trim
• Remotely and electrically trim parameters
on circuits that are physically inaccessible
PIN CONFIGURATION
Using an ALD1108E/ALD1110E is simple and straight forward. The
MOSFETs function as n-channel MOSFETs, except that all the devices
have exceptional matching to each other in electrical characteristics. Since
these devices are on the same monolithic chip, they also exhibit excellent
tempco matching characteristics.
ALD1110E
EPAD 2
EPAD 1
1
2
3
4
P
G
D
8
7
6
5
P
N2
N1
G
D
N2
N1
TheseMOSFETdeviceshaveverylowinputcurrents, andasaresultavery
N1
-
N2
+
12
high input impedance (>10 Ohm). The gate voltage from a control source
+
v
S
, V
12
V
can drive many MOSFET inputs with practically no loading effects. Used in
precision current mirror or current multiplier applications, they can be used
to provide a current source over a 100nA to 3mA range, and with either a
positive, negative or zero tempco.
TOP VIEW
SAL, PAL, DA PACKAGES
ALD1108E
EPAD 1
EPAD 2
ORDERING INFORMATION (“L” suffix denotes lead-free (RoHS))
1
2
3
4
5
6
7
8
P
G
D
16
15
14
13
12
11
10
9
P
N2
N1
N1
N1
Operating Temperature Range*
G
D
N2
0°C to +70°C
0°C to +70°C
-55°C to +125°C
N2
+
+
v
S
V
12
8-Pin SOIC
Package
8-Pin Plastic Dip
Package
8-Pin CERDIP
Package
-
-
v
V
S
D
34
D
N4
N3
ALD1110ESAL
ALD1110EPAL
ALD1110EDA
G
P
G
N4
N3
N3
16-Pin SOIC
Package
16-Pin Plastic Dip
Package
16-Pin CERDIP
Package
P
N4
EPAD 4
EPAD 3
TOP VIEW
SCL, PCL, DC PACKAGES
ALD1108ESCL
ALD1108EPCL
ALD1108EDC
* Contact factory for leaded (non-RoHS) or high temperature versions.
BLOCK DIAGRAM
BLOCK DIAGRAM
ALD1110E
ALD1108E
V+(5)
V+(13)
P
(16)
D
(11)
N3
P
(1)
D
(3)
P
(9)
D
(6)
P
(8)
N4
D
N2
(14)
D
N2
(6)
P (8)
N2
P
(1)
D
(3)
N1
N2
N
N1
N3
N4
N4
N1
(2)
~
G
~
G
(2)
N1
(10)
N3
G
(7)
G
(15)
N2
G
N2
(7)
G
N1
EPAD 2
EPAD 3
EPAD 4
EPAD 1
~
EPAD 1
EPAD 2
~
S
12
(4)
V- (5)
S
(12)
34
S
(4)
12
V- (4)
Rev 2.0 ©2012 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: (408) 747-1155 Fax: (408) 747-1286
www.aldinc.com