A
DVANCED
L
INEAR
D
EVICES,
I
NC.
TM
ALD1108E/ALD1110E
e
®
EPAD
D
LE
AB
E
N
QUAD/DUAL ELECTRICALLY PROGRAMMABLE ANALOG DEVICE (EPAD™)
GENERAL DESCRIPTION
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
MOSFETs that are highly matched in threshold voltages and other electrical
characteristics. For a given input voltage, the threshold voltage of a
MOSFET device determines its drain on-current, resulting in an on-
resistance characteristic that can be precisely preset and then controlled by
the input voltage very accurately.
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.
These MOSFET devices have very low input currents, and as a result a very
high input impedance (>10
12
Ohm). The gate voltage from a control source
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.
BENEFITS
•
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
ALD1110E
1
EPAD 1
2
3
4
v+
EPAD 2
P
N1
G
N1
D
N1
S
12
, V-
8
7
6
5
P
N2
G
N2
D
N2
V+
TOP VIEW
SAL, PAL, DA PACKAGES
ALD1108E
ORDERING INFORMATION
(“L” suffix denotes lead-free (RoHS))
0°C to +70°C
8-Pin SOIC
Package
ALD1110ESAL
16-Pin SOIC
Package
ALD1108ESCL
Operating Temperature Range*
0°C to +70°C
-55°C to +125°C
8-Pin Plastic Dip
Package
ALD1110EPAL
16-Pin Plastic Dip
Package
ALD1108EPCL
8-Pin CERDIP
Package
ALD1110EDA
16-Pin CERDIP
Package
ALD1108EDC
P
N1
G
N1
D
N1
S
12
V-
D
N4
G
N4
P
N4
1
2
3
4
5
6
7
8
EPAD 1
EPAD 2
16
15
14
P
N2
G
N2
D
N2
V+
S
34
D
N3
G
N3
P
N3
v+
v-
13
12
11
10
EPAD 4
EPAD 3
9
TOP VIEW
SCL, PCL, DC PACKAGES
* Contact factory for leaded (non-RoHS) or high temperature versions.
BLOCK DIAGRAM
ALD1108E
V+(13)
P
N
(1)
D
N1
(3)
D
N2
(14)
P
N2
(16)
P
N3
(9)
D
N3
(11)
D
N4
(6)
P
N4
(8)
BLOCK DIAGRAM
ALD1110E
V+(5)
P
N1
(1)
D
N1
(3)
D
N2
(6)
P
N2
(8)
~
G
N1
(2)
G
N2
(15) G
N3
(10)
G
N4
(7)
~
G
N1
(2)
G
N2
(7)
S
12
(4)
V- (5)
S
34
(12)
S
12
(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
~
V- (4)
~
EPAD 1
EPAD 2
EPAD 3
EPAD 4
EPAD 1
EPAD 2
ALD [ ADVANCED LINEAR DEVICES ]
