Data Sheet
N
VE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com
ADL-Series
Nanopower Digital Switches
Key Features
• Ultraminiature 1.1 mm x 1.1 mm x 0.45 mm ULLGA package
• Precise Detection of Low Magnetic Fields
• Low Voltage Operation to 2.4 V
• Typical Power Consumption As Low As 72 nW at 2.4 V
• Digital Switch Output
• Continuously Operating or Duty-Cycled Versions
Description
ADL-Series sensors are Giant Magnetoresistive (GMR) Digital Switches designed to run at low voltages and
extremely low currents. The devices are manufactured with NVE’s patented spintronic GMR technology for
unmatched miniaturization, sensit ivity, precision, and low power.
NVE’s new ULLGA leadless package measures just 1.1 mm x 1.1 mm x 0.45 mm. Bare die
(0.625 mm x 0.625 mm) are also available for extremely space-critical applications.
Configured as a magnetic “switch,” the output turns on when the magnetic field is applied, and turns off
when the field is removed. The applied magnetic field can be of either polarity, and the magnetic operate
point is extremely stable over supply voltage and temperature.
The ICs consist of a GMR sensor element, CMOS signal processing circuitry to convert the analog sensor
element output to a digital output, and optional oscillator and timing circuitry for power management duty
cycling.
Internally duty cycled versions conserve power. Two different duty-cycle frequencies are available, offering
a trade-off between update frequency and power consumption. An integrated latch ensures the output is
available continuously. The continuously operating versions have a frequency response of 250 kHz.
ADL-Series Digital Switches are ideal for battery-powered devices such as gas and water meters, portable
instruments, or anyplace where an extremely low power device is required. The continuously operating
versions consume less than a milliwatt, and the duty-cycled versions consume less than a microwatt. The
output is current-sinking and can sink up to 100 microamps.
Versions of this part with different magnetic characteristics and duty-cycle update frequencies are available.
Please contact NVE for details.
SB-00-017 February 2012
ADL-Series Nanopower Digital Switches
N
VE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com
Functional Block Diagrams
GMR
Sensor
Element
Ou
t
V
DD
Comparator
GMR
Sensor
Element
Latch
Out
V
DD
Oscillator
and Timing
Comparator
Continuously-operating versions
(ADL9xx)
Duty-cycled versions
(ADL0xx/ADL1xx)
Operation
The direction of magnetic field sens itivity is planar to the package. As the field varies in intensity, the digital
output will turn on and off. The user must provide a pull-up resistor on the output terminal.
Sensor Activation With a Permanent Magnet
The diagrams below show two permanent magnet orientations that will activate the se nsor in the direction of
sensitivity (planar to the package):
Magnet
Magnet
ADL-Series Nanopower Digital Switches
N
VE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com
Electrical and Magnetic Specifications
(specifications valid over all operating voltage and temperature ranges):
Parameter Min. Typ. Max. Units
Magnetic Operate Point (ADLx21) 15 20 25 |Oersteds|
(
1
)
Magnetic Operate Point (ADLx22) 30 40 50 |Oersteds|
(
1
)
Magnetic Operate Point (ADLx24) 21 28 34 |Oersteds|
(
1
)
Operate/Release Differential 2 14 |Oersteds|
Operating Voltage (VDD) 2.4 3.0 3.6 Volts
Quiescent Current at 2.4 V (ADL0xx) 0.080 0.160
μ
A
Quiescent Current at 2.4 V (ADL1xx) 0.030 0.060
μ
A
Quiescent Current at 2.4 V (ADL9xx) 35 50
μ
A
Quiescent Current at 3.6 V (ADL0xx) 0.200 0.350
μ
A
Quiescent Current at 3.6 V (ADL1xx) 0.115 0.160
μ
A
Quiescent Current at 3.6 V (ADL9xx) 85 120
μ
A
Peak Current During Sensor Sampling (3.0 V) 60 100
μ
A
Output Drive Current 100
μ
A
VOL at 100 μA Output Drive Current (VDD = 3.6 V) 0.20 Volts
Output Leakage Current 0.005
μ
A
Update Frequency (ADL0xx) 20 55 Hz
Update Frequency (ADL1xx) 10 30 Hz
Operating Frequency (ADL9xx) 250 kHz
Temperature Range of Operation −40 125 °C
Absolute Maximum Ratings
Parameter Rating Units
Applied Magnetic Field Unlimited
(
2
)
|Oersteds|
Supply Voltage 5.5 Volts
Output Off Voltage 5.5 Volts
Output Current 200 μA
Maximum Junction Temperature +170 °C
Storage Temperature −65 to +170 °C
Notes:
1. 1 Oe (Oersted) = 1 Gauss in air = 0.1 mT
2. Large Magnetic Fields WILL NOT damage NVE GMR Sensors
ADL-Series Nanopower Digital Switches
N
VE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com
Performance Over Temperature and Power Supply Range
Average current increases, but remains extremely low, over variations in supply voltage. The magnetic
operate and release points are very stable over temperature and supply voltage. Update frequency increases
as supply voltage increases.
Average Current vs. Supply Voltage
(Typical)
75
100
125
150
175
200
225
250
275
2.4 2.6 2.8 3 3.2 3.4 3.6
Supply Voltage
Current (nA)
Frequency Response vs. Supply Voltage
(Typical; 25ºC)
20
25
30
35
40
45
50
55
60
2.4 2.6 2.8 3 3.2 3.4 3.6
Supply Voltage
Update Frequency (Hz)
Operate and Release Points vs. Temperature
(Typical; 3V Supply)
-40
-30
-20
-10
0
10
20
30
40
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (ºC)
Applied Field (Oe)
Operate Point
Release Point
Release Point
Operate Point
Operate Point vs. Supply Voltage
(Typical; 25ºC)
25
26
27
28
29
30
31
32
33
2.4 2.6 2.8 3 3.2 3.4 3.6
Supply Voltage
Magnetic Field (Oe)
Data Sheet
N
VE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com
Package Drawings, Dimensions, and Specifications:
4-Lead ULLGA Package
1.1 mm x 1.1 mm x 0.45 mm; Lead Pitch 0.65 mm
Dimensions in mm; ±0.10 mm
Bottom View
1.10
0.35 0.65
1.10
0.40
0.60
0.05 0.10
0.30
12
34
1.10
1.10 0.45
Side View
0.20
Direction of Sensitivity
Top View
Pinout:
Pin 1 No Connect
Pin 2 VDD
Pin 3 Out
Pin 4 Ground
Part Numbering
The following example shows the ADL-Series part-numbering system:
ADL 0 21 - 14E
Base Part
ADL = Low hysteresis
digital switch
Duty Cycling
0 = 55 Hz duty cycled
1 = 30 Hz duty cycled
9 = Continuous
Typ. Magnetic
Operate Point
21 = 20 Oe
22 = 40 Oe
24 = 28 Oe
Package Type
01 = 0.625 mm x
0.625 mm bare die
14E = 1.1 mm x
1.1 mm RoHS ULLGA
ADL-Series Nanopower Digital Switches
N
VE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com
Package Marking Codes:
Part Number Mark
ADL021-14E V
ADL022-14E *
ADL024-14E C
ADL121-14E *
ADL122-14E *
ADL124-14E D
ADL921-14E *
ADL922-14E *
ADL924-14E *
*Marking not yet assigned
©NVE Corporation
All rights are reserved. Reprodu ction in whole or in part is prohibited without the prior written consent of the copyright owner.
SB-00-017 February 2012
ADL-Series Nanopower Digital Switches
N
VE Corporation • 11409 Valley View Road, Eden Prairie, MN 55344-3617 • (952) 829-9217 • www.nve.com
Datasheet Limitations
The information and data provided in datasheets shall define the specification of the product as agreed between NVE and its customer, unless NVE and
customer have explicitly agreed otherwise in writing. All specifications are based on NVE test protocols. In no event however, shall an agreement be
valid in which the NVE product is deemed to offer functions and qualities beyond those described in the datasheet.
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Information in this document is believed to be accurate and reliable. However, NVE does not give any representations or warranties, expressed or
implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information.
In no event shall NVE be liable for any indirect, incidental, punitive, special or consequential damages (including, without limitation, lost profits, lost
savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on
tort (including negligence), warranty, breach of contract or any other legal theory.
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NVE reserves the right to make changes to information published in this document including, without limitation, specifications and product descriptions
at any time and without notice. This document supersedes and replaces all information supplied prior to its publication.
Use in Life-Critical or Safety-Critical Applications
Unless NVE and a customer explicitly agree otherwise in writing, NVE products are not designed, authorized or warranted to be suitable for use in life
support, life-critical or safety-critical devices or equipment. NVE accepts no liability for inclusion or use of NVE products in such applications and such
inclusion or use is at the customer’s own risk. Should the customer use NVE products for such application whether authorized by NVE or not, the
customer shall indemnify and hold NVE harmless against all claims and damages.
Applications
Applications described in this datasheet are illustrative only. NVE makes no representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications and products using NVE products, and NVE accepts no liability for any
assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NVE product is suitable and fit for
the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customers. Customers should
provide appropriate design and operating safeguards to minimize the risks associated with their applications and products.
NVE does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party customers. The customer is responsible for all necessary testing for the
customer’s applications and products using NVE products in order to avoid a default of the applications and the products or of the application or use by
customer’s third party customers. NVE accepts no liability in this respect.
Limiting Values
Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the
device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the recommended
operating conditions of the datasheet is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the
quality and reliability of the device.
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In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NVE hereby expressly objects to
applying the customer’s general terms and conditions with regard to the purchase of NVE products by customer.
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This document as well as the items described herein may be subject to export control regulations. Export might require a prior authorization from national
authorities.
Automotive Qualified Products
Unless the datasheet expressly states that a specific NVE product is automotive qualified, the product is not suitable for automotive use. It is neither
qualified nor tested in accordance with automotive testing or application requirements. NVE accepts no liability for inclusion or use of non-automotive
qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall
use the product without NVE’s warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the
product for automotive applications beyond NVE’s specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies
NVE for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NVE’s
standard warranty and NVE’s product specifications.
