ALD1123E/ALD1121E are monolithic quad/dual EPAD® (Electrically Program-
mable Analog Device) N-channel MOSFETs with electrically adjustable threshold
(turn-on) voltage. The ALD1123E/ALD1121E are precision matched and adjusted
(e-trimmed) at the factory resulting in quad/dual MOSFETs that are highly matched
in electrical characteristics. The ALD1123E has four (4) separate source pins. SN1,
SN2 share a common substrate pin V-1 which has to be connected to the most
negative voltage potential. Likewise, SN3, SN4 share a common substrate pin V-2
which has to be connected to the negative voltage potential for SN3, SN4. The
ALD1121E has two (2) separate source pins (SN1, SN2). Both SN1, SN2 share a
common substrate pin 4 which has to be connected to the most negative voltage
potential.
Using an ALD1123E/ALD1121E MOSFET array is simple and straight forward. The
MOSFETs function in electrical characteristics as n-channel MOSFETs except that
all the devices have exceptional matching to each other. 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. 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 100 nA to 3 mA range, and with either a positive, negative or zero tempco.
Optional EPAD Threshold Voltage Trimming By User
•
Precision PC-based electronic calibration
•
Automated voltage trimming or setting
•
Remote voltage or current adjustment of
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
inaccessible nodes
PCMCIA based instrumentation trimming
Electrically adjusted resistive load
Temperature compensated current sources
and current mirrors
Electrically trimmed/calibrated current
sources
Permanent precision preset voltage level
shifter
Low temperature coefficient voltage and/or
current bias circuits
Multiple preset voltage bias circuits
Multiple channel resistor pull-up or pull-down
circuits
Microprocessor based process control systems
Portable data acquisition systems
Battery operated terminals and instruments
Remote telemetry systems
E-trim gain amplifiers
Low level signal conditioning
Sensor and transducer bias currents
Neural networks
BLOCK DIAGRAM
ALD1121E
P
N1
(1)
D
N1
(3)
D
N2
(7)
P
N2
(5)
G
N1
(2)
G
N2
(6)
The basic EPAD MOSFET device is a monotonically adjustable device which means
the device can normally be e-trimmed to increase in threshold voltage and to
decrease in drain-on current as a function of a given input bias voltage. Used as an
in-circuit element for trimming or setting a combination of voltage and/or current
characteristics, it can be e-trimmed remotely and automatically. Once e-trimmed,
the set voltage and current levels are stored indefinitely inside the device as a
nonvolatile stored charge, which is not affected during normal operation of the
device, even when power is turned off. A given EPAD device can be adjusted many
times to continually increase its threshold voltage. A pair of EPAD devices can also
be connected differentially such that one device is used to adjust a parameter in one
direction and the other device is used to adjust the same parameter in the other
direction.
The ALD1123E/ALD1121E can be e-trimmed with the ALD EPAD programmer to
obtain the desired voltage and current levels. Or they can be e-trimmed as an active
in-system element in a user system, via user designed interface circuitry. PN1, PN2,
etc., are pins required for optional e-trim of respective MOSFET devices. If unused,
these pins are to be connected to V- or ground. For more information, see
Application Note AN1108.
ALD1123E
M1
S
N1
(4)
V- (4)
BLOCK DIAGRAM
P
N1
(1)
G
N1
(2)
S
N1
(4)
V-
1
(4)
S
N2
(16)
S
N3
(12)
ALD1123E/ALD1121E
Advanced Linear Devices
~
~
M1
~
M2
S
N2
(8)
D
N1
(3)
D
N2
(15)
P
N2
(13)
P
N3
(9)
D
N3
(11)
D
N4
(7)
P
N4
(5)
G
N2
(14) G
N3
(10)
G
N4
(6)
M2
M3
M4
V-
2
(8)
S
N4
(8)
2
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V
+
referenced to V
-
Supply voltage, V
S
referenced to V
-
Differential input voltage range
Power dissipation
Operating temperature range PA, SA, PC, SC package
DA, DC package
Storage temperature range
Lead temperature, 10 seconds
-0.3V to +13.2V
±6.6V
0.3V to V
+
+0.3V
600 mW
0°C to +70°C
-55°C to +125°C
-65°C to +150°C
+260°C
OPERATING ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C V+ = +5.0V unless otherwise specified
Parameter
Drain to Source Voltage
1
Initial Threshold Voltage
2
E-trim Vt Range
Drain - Gate Connected
Voltage Tempco
Symbol
V
DS
V
t i
V
t
TCV
DS
0.990
1.000
-1.6
-0.3
0.0
+2.7
Initial Offset Voltage
3
V
OS i
1
5
1.000
ALD1123E
Min
Typ
Max
10.0
1.010
3.000
0.990
1.000
-1.6
-0.3
0.0
+2.7
1
5
1.000
Min
ALD1121E
Typ
Max
10.0
1.010
3.000
Unit
V
V
V
mV/°C
mV/°C
mV/°C
mV/°C
mV
I
D
= 5µA
I
D
= 50µA
I
D
= 68µA
I
D
= 500µA
I
DS
= 1µA T
A
= 21°C
Test
Conditions
Tempco of V
OS
Differential Threshold Voltage
Tempco of Differential
Threshold Voltage
4
Long Term Drift
Long Term Drift Match
Drain Source On Current
4
TCV
OS
DV
t
5
2.000
5
2.000
µV/°C
V
V
DS1
= V
DS2
TCDV
t
∆V
t
/∆t
∆V
t
/∆t
I
DS(ON)
0.033
-0.02
-5
3.0
-0.05
0.033
-0.02
-5
3.0
-0.05
mV/°C
mV
µV
mA
1000 Hours
1000 Hours
V
G
=V
D
= 5V V
S
= 0V
V
t
= 1.0
Drain Source On Current
4
I
DS(ON)
0.8
0.8
mA
V
G
=V
D =
5V V
S =
0V
V
t
= 3.0
V
t
= 1.000V
Initial Zero Tempco Voltage
3
Zero Tempco Current
Initial On-Resistance
3
On-Resistance Match
V
ZTCi
I
ZTC
R
ON i
∆R
ON
1.52
68
500
0.5
1.52
68
500
0.5
V
µA
Ω
%
V
GS
¡= 5V V
DS
= 0.1V
NOTES:
1. V+ must be the most positive supply rail and V- must be at the most negative supply rail. Source terminals other than those labeled as V- can be at
any voltage between V- and V+.
2. Initial Threshold Voltage is set at the factory. If no EPAD Vt trimming is intended by user, then this is also the final or permanent threshold voltage
value.
3. Initial and Final values are the same unless deliberately changed by user.
4. These parameters apply only when Vt of one or more of the devices are to be changed by user.
The forum is holding a "National Competition Experience Sharing" event, everyone is welcome to participate! ! ! Looking forward to your sharing!
Event link: EEWorld invites you to participate in the "...
I am a beginner and I don't understand. For example, 3-6=-3 6+5=11. I don't know how to handle this. I just need an assembler to handle the addition and subtraction of one byte. It doesn't have to be ...
Hi3520 PCI supports device mode and can be connected to a PC to verify the communication function. You can get a conclusion of yes or no. But you must strive for the correctness of the conclusion!...
I am quite interested in wireless positioning and found that the most commonly used solutions are UWB, Zigbee and WIFI. Symeo has a UWB solution with an accuracy of 5cm, but it is very expensive and I...
A single-chip microcomputer is also called a single-chip microcontroller. It is not a chip that completes a certain logical function, but a computer system integrated into one chip. In general, a c...[Details]
When choosing a laptop battery, you should consider several factors, such as power, appearance, and quality.
Regarding power, we often see that a manufacturer uses values such as the number ...[Details]
Images in science fiction movies often break through the limits of reality, such as in the movie "Minority Report." Tom Cruise uses a multi-touch screen to browse information. Capacitive sensing te...[Details]
The data collector of the automatic weather station is generally designed based on a single-chip microcomputer or a PC/104 bus controller. It has the characteristics of good compatibility with PC, low...[Details]
introduction
The emergence of high-performance, low-power embedded CPUs and high-reliability network operating systems has made it possible to implement applications with large amounts of comp...[Details]
1 Introduction
Water resources are the basic conditions for human survival and the lifeline of economic development. The reality shows that due to the global shortage of water resources and th...[Details]
Xiaomi, a well-known Internet phone in mainland China, won a million-unit order contract from China Unicom on November 20 last year, which made Xiaomi famous in mainland China. In April this year...[Details]
Smart lighting control systems provide high controllability for various buildings and further enhance the level of green energy. They are the core products of energy conservation and digital techn...[Details]
With the continuous consumption of earth's energy and the scarcity of resources, the harm of greenhouse effect to human beings, and the serious pollution of the atmosphere to the earth, the intern...[Details]
The traditional display screen using 51 single-chip microcomputer to control LED dot matrix has relatively simple functions. If it is to achieve diversified functions, it often takes a lot of time ...[Details]
FPGAs are used in 81% of electronic systems, including many commercial and defense products, and most FPGAs use BGA packaging. The BGA packaging is characterized by small solder balls and small sol...[Details]
Problems such as the depletion of natural resources, air pollution, traffic congestion, and rising fossil fuel prices have forced societies and individuals to seek alternative means of transportati...[Details]
Motors, especially those with brushes, generate a lot of noise. This noise must be dealt with if the appliance is to meet the requirements of EMC standards. The means to solve EMC are nothing more ...[Details]
Since AC mains power may experience power outages, voltage sags and surges, continuous undervoltage and overvoltage, and frequency fluctuations during supply, these factors will affect the continuous ...[Details]
Liquid crystal display (LCD) panels have a wide range of applications, from small portable electronic devices to large fixed devices, including digital cameras, laptops, personal data assistants, d...[Details]
Electronics Design Contest
京公网安备 11010802033920号
EEWORLD
