AH8503

AH8503
HIGH ACCURACY MICROPOWER
LINEAR HALL EFFECT SENSOR
Description
Pin Assignments
The AH8503 is a high accuracy, micropower linear Hall effect sensor
with an 8-bit output resolution. The output voltage is ratiometric to the
supply voltage and proportional to the magnetic flux density
perpendicular to the part marking surface. The output null voltage is
at half the supply voltage.
(Top View)
AH8503 is a trimmed device with typical sensitivity of 2.25mV/G and
3.8mV/G at 1.8V and 3V respectively with an accuracy of 3% at
+25°C. The device has a typical input referred rms noise of 0.36G and
0.24G at 1.8V and 3.0V.
Designed for battery powered consumer equipment to office
equipment, home appliances and industrial applications, the AH8503
can operate over the supply range of 1.6V to 3.6V. The device has a
CNTRL pin to select the operating modes and sampling rate to
minimize power consumption. The device operates in default
micropower mode with a sampling rate of 24Hz typical and consumes
only 13µA typical at 1.8V. In turbo mode with a continuous 6.25kHz
sample rate, the current consumption is 1mA typical. In external-drive
mode, the CNTRL be can be used to change the sampling frequency
up to 7.14KHz with current consumption of 1.16mA typical at 1.8V.
To minimize PCB space the AH8503 are available in small low profile
U-DFN2020-6.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
High Accuracy Linear Hall Effect Sensor with +/-400G Sense
Range and Output Voltage with 8-bit resolution
Supply Voltage of 1.6V to 3.6V
High Accuracy: Trimmed Sensitivity of 2.225mV/G and 3.8mV/G
at 1.8V and 3V respectively with accuracy of 3% at +25°C.
Low Offset Voltage
Micropower (Default), Turbo and External-Drive Modes
Ultra Low Average Supply Current
13µA typical in micropower mode (default) period at 1.8V
1.01mA typical in turbo mode at 1.8V
1.16mA typical in external drive mode with 7.14kHz
sampling rate at 1.8V
Chopper Stabilized Design with Superior Temperature Stability,
Minimal Sensitivity Drift, Enhanced Immunity to Physical Stress
Output Voltage Maintained at ‘Sleep’ Mode
-40°C to +85°C Operating Temperature
High ESD capability of 6kV Human Body Model
Small Low Profile U-DFN2020-6 Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
U-DFN2020-6
Applications
•
•
•
•
•
•
•
High Accuracy Level, Proximity, Position and Travel Detection
Button Press Detection in Digital Still, Video Cameras and
Handheld Gaming Consoles
Accurate Door, Lids and Tray Position Detection
Liquid Level Detection
Joy Stick Control – Gaming and Industrial Applications
Smart Meters
Contact-Less Level, Proximity and Position Measurement in
Home Appliances and Industrial Applications
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AH8503
Document number: DS37684 Rev. 1 - 2
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AH8503
Typical Applications Circuit
Note:
4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical and should be placed as close to
the supply pin as possible.
Pin Descriptions
Package: U-DFN2020-6
Pin Number
Pin Name
1
OUTPUT
2
NC
3
VDD
Function
Output Pin
No Connection (Note 5)
Power Supply Input
Device Control Pin:
The CNTRL pin selects the modes of operation (Micropower Mode, Turbo
Mode and External-Drive Mode) and adjusts the sampling rate in External
Drive Mode to minimize the power consumption.
When CNTRL = GND or floating, the device operates in default Micropower
Mode with 24Hz sampling rate and consumes 13µA typical at 1.8V. The
CNTRL pin is internally pulled low.
4
CNTRL
When CNTRL = VDD, the device is on and operates in Turbo Mode with
continuous sampling rate of 6.25kHz typical consuming 1.01mA typical at
1.8V
In External Drive Mode, an external PWM signal can be used to drive the
CNTRL pin to adjust the sampling frequency form 24Hz typical up to 7.14kHz
typical. If external PWM pulse is used, the minimum pulse width needed on
the CNTRL pin to start a sample/conversion is 20µs typical. We
recommended using a pulse width of 40µs minimum. The minimum sample
and conversion cycle is140µs typical.
Note:
5
GND
6
NC
No Connection (Note 5)
Pad
Pad
The center exposed pad – No connection internally.
The exposed pad can be left open (unconnected) or tied to the GND on the
PCB layout.
Ground Pin
5. NC is “No Connection” pin and is not connected internally. This pin can be left open or tied to ground.
AH8503
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AH8503
Functional Block Diagram
Absolute Maximum Ratings (Note 6) (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
VDD and VOUT
Supply Voltage and Output Voltage (Note 7)
VDD_REV and
VOUT_REV
Reverse Supply and Output Voltage
IOUT
Output Current (limited by 10kOhms output resistor)
B
Magnetic Flux Density Withstand
PD
Package Power Dissipation
Ts
Storage Temperature Range
TJ
Maximum Junction Temperature
ESD HBM
Notes:
Rating
Unit
4
V
-0.3
V
VDD/10
mA
Unlimited
U-DFN2020-6
Human Body Model (HMB) ESD Capability
230
mW
-65 to +150
°C
150
°C
6
kV
6. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
7. The absolute maximum VDD of 4V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to
operate the device at the absolute maximum rated conditions for any period of time.
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Symbol
VDD
TA
Parameter
Conditions
Rating
Unit
Supply Voltage
Operating
1.6V to 3.6V
V
Operating Temperature Range
Operating
-40 to +85
°C
AH8503
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AH8503
Electrical Characteristics (Notes 8 & 9) (@TA = +25°C, VDD = 1.8V, unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
-
13
20
µA
-
17
25
µA
-
1.01
1.3
mA
-
1.44
1.8
mA
-
1.16
1.5
mA
-
1.65
2.1
mA
Supply Current
IDD_uP_MODE
IDD_TURBO_MODE
Average Supply Current in
Micropower Mode with Continuous
Sampling Rate of 24Hz
VOUTPUT = VDD/2, CNTRL = GND, VDD = 1.8V
(CNTRL = GND Continuously)
(Note 10)
Average Supply Current in Turbo
VOUTPUT = VDD/2, CNTRL = VDD, VDD = 1.8V
(Note 10)
VOUTPUT = VDD/2, CNTRL = GND, VDD = 3.0V
Mode with Continuous Sampling Rate (Note 10)
of 6.25Hz
VOUTPUT = VDD/2, CNTRL = GND, VDD = 3.0V
(CNTRL = VDD Continuously)
(Note 10)
VOUTPUT = VDD/2, CNTRL clocking at 7.14kHz
VDD = 1.8V
IDD_7kHz_EXTDRV
Average Supply Current at 7.14kHz
Sampling Rate When CNTRL is
Externally Driven
(Note 10)
VOUTPUT = VDD/2, CNTRL clocking at 7.14kHz
VDD = 3V
(Note 10)
Notes:
8.
When power is initially turned on, the operating VDD (1.6V to 3.6V) must be applied to guaranteed the output sampling.
After the supply voltage reaches minimum operating voltage, the output state is valid after after tON_INITIAL.
9. Typical data is at TA = +25°C, VDD = 1.8V unless otherwise stated.
10. The parameters are not tested in production, they are guaranteed by design, characterization and process control.
AH8503
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AH8503
Electrical Characteristics (continued) (@TA = +25°C, VDD = 1.8V, unless otherwise specified.)
CNTRL pin timing, conversion rate and IDD supply current relationship
AH8503 CNTRL Pin Driven Externally – External Drive Mode
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
ten
EN
TCONV
Tclk
OUT
DATA0
DATA1
Status
AWAKE(ON)
SLEEP
AWAKE(ON)
SLEEP
ICC
1.35mA
8.9µA
1.35mA
8.9µA
Status: AWAKE: chip processing phase (12*Tclk) ,
SLEEP: chip retain data
Tclk: internal clock period, typical = 10µs
ten : pulse width of enable signal, minimum=2*Tclk= 20µs (typical)
TCONV: One sample/conversion cycle = 14*Tclk= 140µs (typical)
IDD ( @ VDD = 1.8V, 25oC):
(1) If CNTRL pin clocked at maximum (~7.14 kHz): IDD = 1.35 mA*12/14+8.93µA*2/14 ≈ 1.16mA
(2) If CNTRL pin clocked at 24Hz: IDD ≈ 13µA
(3) If CNTRL clocking period =T, IDD = 1.35mA*120µs/T + 8.93µA*(T-120µs)/T
AH8503 CNTRL = GND or Logic Low (0) Continuously – Micropower Mode
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110
TS=4096*Tclk
EN
DATA0
OUT
Status
AWAKE(ON)
SLEEP
ICC
1.35mA
8.9uA
DATA1
AWAKE(ON)
SLEEP
1.35mA
8.9uA
Tclk: internal clock period, typical= 10µs
TS: awake cycle time = 4096*Tclk ≈ 41ms
AH8503 CNTRL = VDD or Logic High Continuously – Turbo Mode
0
1
2
3
4
5
6
7
EN
OUT
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TCONV
Tclk
DATA0
Status
AWAKE(ON)
SLEEP
ICC
1.35mA
8.9µA
DATA1
AWAKE(ON)
1.35mA
SLEEP
8.9µA
Tclk: internal clock period, typical= 10µs
TCONV: One sample/conversion period when ENABLE = Hugh (VDD )= 16*Tclk=160µs
IDD ( @ VDD = 1.8V, 25oC):
IDD = 1.35mA*120µs/160µs + 8.93µA*40µs/160µs ≈ 1.01mA (typical)
AH8503
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AH8503
Electrical Characteristics (cont.) (Notes 11, 12 & 13) (@TA = +25°C, VDD = 1.8V, unless otherwise specified.)
Symbol
tON_INITIAL
Parameter
Initial Power On Time
Min
Typ
Max
Unit
VDD = 1.8V, TA = +25°C, CIN=0.1µF,
VDD rise time =10µs
(Note 14)
Conditions
-
1
-
ms
VDD = 3V, TA = +25°C, CIN=0.1µF,
VDD rise time =10µs
(Note 14)
-
0.2
-
ms
-
20
-
µs
Minimum Pulse Width on CNTRL Pin To
Start One Conversion Cycle When
VDD = 1.6V to 3.6V, TA = -40°C to +85°C
Driving CNTRL Pin Externally
(Note 14)
(See application note section)
ten
Minimum Period of One
Sample/Conversion Cycle
VDD = 1.6V to 3.6V, TA = -40°C to +85°C
(Note 14)
100
140
200
µs
Maximum Sampling Frequency
VDD = 1.6V to 3.6V, TA = -40°C to +85°C,
(Note 14)
-
7.14
-
kHz
Sampling Frequency in Turbo Mode with CNTRL = High (VDD),
f_TURBO_MODE CNTRL = VDD or Logic High
VDD = 1.6V to 3.6V, TA = -40°C to +85°C
(Note 14)
Continuously
-
6.25
-
kHz
CNTRL = High (VDD),
VDD = 1.6V to 3.6V, TA = -40°C to +85°C
(Note 14)
-
24
-
Hz
CNTRL = High (VDD),
VDD = 1.6V to 3.6V, TA = -40°C to +85°C
(Note 14)
-
0.16
-
ms
Awake or Sampling Period in
CNTRL = High (VDD),
Micropower Mode with CNTRL = GND or VDD = 1.6V to 3.6V, TA = -40°C to +85°C
(Note 14)
Logic Low Continuously
-
41.6
-
ms
TCONV
fMAX
f_uP_MODE
Sampling Frequency in Micropower
Mode with CNTRL = GND or Logic Low
Continuously
Awake or Sampling Period in Turbo
T_TURBO_MODE Mode with CNTRL = VDD or Logic High
Continuously
T_uP_MODE
VCNTRL_LOW CNTRL Pin Input Low Voltage
VCNTRL_HIGH
CNTRL Pin Input High Voltage
VDD = 1.8V (Note 13)
0.4
0.5
0.6
V
VDD = 3.0V (Note 13)
0.8
0.9
1
V
VDD = 1.8V (Note 13)
1.2
1.3
1.4
V
VDD = 3V
2.2
2.3
2.4
V
CNTRL = VDD or GND,
VDD = 1.6V to 3.6V, TA = -40°C to +85°C,
(Note 14)
-
10
13
kΩ
(Note 13)
Output Characteristics
ROUT
DC Output Resistance
Noise_RMS
ADCRES
DACRES
VOUT_RES
Input Referred Noise, RMS (Note 14)
Internal ADC and DAC resolution
CIN = Open, VDD = 1.8V, TA = +25°C,
-
0.36
-
G
CIN = Open, VDD = 3.0V, TA = +25°C,
-
0.24
-
G
(Note 14)
-
8
-
Bit
Output Voltage Resolution
VDD = 1.6V to 3.6V, TA = -40°C to +85°C
-
VDD/256
-
mV
VOUTH
Max. Output Voltage
VDD = 1.6V to 3.6V, TA = -40°C to +85°C
-
VDD*255/256
-
V
VOUTL
Min. Output Voltage
VDD = 1.6V to 3.6V, TA = -40°C to +85°C
-
0
-
V
Notes:
11. When power is initially turned on, the operating VDD (1.6V to 3.6V) must be applied to guarantee the output sampling.
The output state is valid after tON_INITIAL from the supply voltage reaching the minimum operating voltage.
12. Typical data is at TA = +25°C, VDD = 1.8V unless otherwise stated.
13. Maximum and minimum parameters values over operating temperature range are not tested in production, they are guaranteed by design,
characterization and process control.
14. The parameter is not tested in production, they are guaranteed by design, characterization and process control.
AH8503
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AH8503
Electrical Characteristics (cont.) (Notes 11, 12 & 13) (@TA = +25°C, VDD = 1.8V, unless otherwise specified.)
Symbol
Magnetic Characteristics
BRANGE
GRES
VNULL
VOFFSET
VSENS
VSENS_ACC
TC_ERRSENS
Notes:
Parameter
Measurable Magnetic Flux Density
Range
Gauss Resolution
Quiescent Output Voltage with Zero
Gauss
Quiescent Output Voltage Offset
Output Voltage Sensitivity
Sensitivity Accuracy
Sensitivity Error over Full Temperature
Lin+
Positive Linearity (span linearity)
Lin-
Negative Linearity (span linearity)
Conditions
Min
Typ
Max
Unit
VDD = 1.8V, TA = +25°C
±388
±400
±412
G
VDD = 3V, TA = +25°C
±382
±395
±408
G
VDD = 1.8V, TA = +25°C
3.033
3.125
3.221
G/LSB
VDD = 3V, TA = +25°C
2.994
3.084
3.179
G/LSB
B = 0.5G, TA = +25°C
-
VDD / 2
-
V
VDD = 1.8V, TA = +25°C
0.882
0.9
0.918
V
VDD = 3V, TA = +25°C
1.47
1.5
1.53
V
B = 0.5G, VDD = 1.8V, TA = +25°C
-1%
-
1%
% of VDD
B = 0.5G, VDD = 3V, TA = +25°C
-1%
-
1%
% of VDD
B = 0.5G, VDD = 1.6V to 3.6V,
TA = -40°C to +85°C
(Note 14)
-1.5
-
1.5
% of VDD
VDD = 1.8V, TA = +25°C
2.183
2.25
2.318
VDD = 3V, TA = +25°C
3.686
3.80
3.914
VDD = 1.8V, TA = +25°C
-3
-
3
%
VDD = 3V, TA = +25°C
mV/G
-3
-
3
%
VDD = fixed at any one voltage between
1.6V to 3.6V,
TA = -40°C to +85°C
(Note 14, Note 15)
-6
-
6
%
VDD=fixed, TA = -40°C to +85°C
(Note 14)
-3
-
3
%
VDD = 1.8V, TA = +25°C (Note 14)
-
99.9
-
%
VDD = 3.0V, TA = +25°C (Note 14)
-
99.7
-
%
VDD = 1.8V, TA = +25°C (Note 14)
-
100.1
-
%
VDD = 3.0V, TA = +25°C (Note 14)
-
100.4
-
%
11. When power is initially turned on, the operating VDD (1.6V to 3.6V) must be applied to guarantee the output sampling.
The output state is valid after tON_INITIAL from the supply voltage reaching the minimum operating voltage.
12. Typical data is at TA = +25°C, VDD = 1.8V unless otherwise stated.
13. Maximum and minimum parameters values over operating temperature range are not tested in production, they are guaranteed by design,
characterization and process control.
14. The parameter is not tested in production, they are guaranteed by design, characterization and process control.
15. This term constitutes of output voltage sensitivity temperature coefficient error and sensitivity trim accuracy.
AH8503
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AH8503
Application Note
CNTRL Pin - Awake and Sleep Period and Operating Mode Control
CNTRL pin controls the device operating mode (Micropower, Turbo, External Drive modes) and “Awake” and “Sleep” periods during external
drive mode.
When the CNTRL pin is pulled low or GND continuously, the device operates in micropower mode with a sampling rate of 24Hz and consumes
only 13µA typical at 1.8V. The CNTRL pin is internally pulled low and therefore the default mode is micropower mode if the CNTRL pin is left
floating.
When CNTRL is pulled high (CNTRL = VDD or pulled high) continuously, the device runs in Turbo Mode with a sampling rate of 6.25kHz and
consumes 1.01mA typical at 1.8V. When the CNTRL pin is pulled high continuously, the conversion time TCONV is 16 clock cycles (160µs typical)
and therefore the sampling rate is 6.25kHz.
If the CNTRL pin is driven externally with a PWM signal (External Drive Mode), the sampling rate can be adjusted from 24Hz to 7.14kHz. A
minimum pulse width on CNTRL pin to start a sample/conversion is 20µs typical; we recommend using a pulse width of 40µs minimum.
In external drive mode with a PWM signal on the CNTRL pin, the conversion time (signal acquisition, conversion and output update) TCONV is 14
clock cycles (140µs typical). When the CNTRL goes high, the sample trigger delay is 1 clock pulse (10µs) where the supply current remains at
8.93µA typical at VDD = 1.8V. After the sample trigger delay, the next 12 clock pulse (120µs typical) is the ‘Awake’ period, where the typical
supply current is 1.35mA at 1.8V supply. The next pulse (10µs) is used to update the output stage and during this time the supply current drops
back to 8.93µA typical at 1.8V supply. Therefore, the average supply current of the device depends on the sampling frequency and at the
maximum sampling rate of 7.14kHz, it is 1.16mA typical at 1.8V.
The maximum sampling frequency is 7.14kHz when the CNTRL pin is externally driven with a PWM signal.
For CNTRL pin clocking period of T, the average current is given by
DD = DD = .
×.
×
(@ 1.8V)
_ ×_ ×
(General equation)
Quiescent Output Voltage VNULL and Offset Voltage
The figure below shows the ideal transfer curve near zero magnetic field (B = 0Gauss). Zero Gauss is the transition point between
VOUTPUT = VDD*127/128 and VOUTPUT = VDD/2. When B is slightly larger than zero, the output is one-half the supply voltage typically.
Quiescent output voltage (VNULL) is defined as the typical output voltage when B = 0.5Gauss (slightly higher than 0G). Any difference of VNULL
from VDD/2 introduces offset (VOFSET).
Transfer Curve Near 0Gauss
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Application Note (continued)
Sensitivity and Transfer Characteristic
The device responds to the magnetic flux density perpendicular to the part marking surface. For South pole magnetic flux density increase from
0G, the output voltage will increase from VNULL and for a North magnetic pole field, the output will decrease from VNULL. The changes in the
voltage level up or down are symmetrical to VNULL and are proportional to the magnetic flux density.
The output voltage change is proportional to the magnitude and polarity of the magnetic field perpendicular to the part marking surface. This
proportionality is defined as output voltage sensitivity and is given by:
!SENS = !OUTB_MAX − !OUTB_MIN
.MAX − .MIN
The AH8503 has a measurable magnetic field range of +/-400G and output voltage range of 0V to (255/256)VDD. Therefore, sensitivity at 1.8V is
given by:
1.8!
!SENS_1.8V = = 2.256!/3
8003
The device has an internal ADC and DAC with resolution of 8-bits. Therefore the measurement resolution is 3.125G/LSB at VDD = 1.8V. In terms
of voltage, the output resolution at 1.8V is 7mV/LSB typical. The device follows the 8-bit step for transfer curve superimposed on the VSENS
above. This difference in theoretical linear value with 8-bit resolution steps produces a measurement (quantization) error at each step.
Output Voltage VOUTPUT (V)
Quantization error (also measurement error) = 0.5*step = VDD/512(output voltage)
Or = Full magnetic range/512 (input magnetic field)
3.9
TA = +25 °C
3.6
3.3
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
0.6
0.3
0.0
-500
-400
-300
3.6V
3.3V
3.0V
1.8V
1.6V
-200
-100
0
100
200
300
400
500
Magnetic Flux Density, B (Gauss)
Transfer Curve – Output Voltage vs Magnetic Flux Density
AH8503
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AH8503
Application Note (cont.)
Span Linearity
Coordinate of transition points (V0~V255 and B0~B254) can be extracted from a transfer curve. Span linearity is defined and based on these
coordinate points.
Span linearity is defined as linearity arising from sensitivity differences between the maximum flux density range and half of the range for positive
and negative flux density. Referring to the diagram below, north field span linearity LIN- and south field span linearity LIN+ are given by:
89−=
89+=
AH8503
Document number: DS37684 Rev. 1 - 2
!0 − !127/.0 − .127
!64 − !127/.64 − .127
!254 − !127/.254 − .127
!190 − !127/.190 − .127
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AH8503
Typical Operating Characteristics
Average Supply Current
Average Supply Current IDD (µA)
24.0
22.0
20.0
18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
Micropower Mode – 24Hz Sample Rate
Micropower Mode, CNTRL = GND, TA = +25 °C,
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
Average Supply Current IDD (mA)
3.6V
3.3V
3.0V
2.5V
1.8V
1.6V
-50
-40
-30
-20
-10
30
40
50
60
70
80
Temperature ( C)
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Turbo Mode, CNTRL = VDD
3.6V
3.3V
3.0V
2.5V
1.8V
1.6V
-50
-40
-30
-20
-10
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
40
50
60
70
80
90
3.6V
3.3V
3.0V
2.5V
1.8V
1.6V
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
Temperature (oC)
Average Supply Current (CNTRL = PWM) vs Supply Voltage
Document number: DS37684 Rev. 1 - 2
30
Externally Driven, CNTRL = 20µs pulse 7.14kHz PWM
Supply Voltage (V)
AH8503
20
External Drive Mode with 7.14kHz Sampling Rate
Average Supply Current IDD (mA)
2
10
Average Supply Current (CNTRL = VDD) vs Temperature
Externally Driven, CNTRL = 20µs pulse 7.14kHz PWM, TA = +25 °C
1.8
0
Temperature (oC)
External Drive Mode with 7.14kHz Sampling Rate
1.6
90
Turbo Mode – 6.25kHz Sample Rate
Average Supply Current (CNTRL = VDD) vs Supply Voltage
Average Supply Current IDD (mA)
20
Average Supply Current (CNTRL = GND) vs Temperature
1.6
1.4
10
Supply Voltage (V)
Supply Voltage (V)
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
Average Supply Current (CNTRL= GND) vs Supply Voltage
Turbo Mode, CNTRL = VDD , TA = +25 °C
1.4
Micropower Mode, CNTRL = GND
o
Turbo Mode – 6.25kHz Sample Rate
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
24.0
22.0
20.0
18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
3.8
Average Supply Current IDD (mA)
Average Supply Current IDD_uP (µA)
Micropower Mode – 24Hz Sample Rate
Average Supply Current (CNTRL = PWM) vs Temperature
11 of 19
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AH8503
Typical Operating Characteristics (continued)
5.0
CIN = 0.1µF, VDD rise time 10µs, TA = +25 °C
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
Initial Power On Time tON_INITIAL (ms)
Initial Power On Time tON_INITIAL (ms)
Typical Initial Power On Time
18.0
CIN = 0.1µF, VDD rise time 10µs
16.0
1.6V
14.0
12.0
10.0
8.0
6.0
1.8V
4.0
2.0
2.5V 3.0V 3.3
V
0.0
-50
-40
-30
3.6
V
-20
-10
0
10
20
30
40
50
60
70
80
90
Temperature (oC)
Supply Voltage (V)
Initial Power On Time vs Temperature
Initial Power On Time vs Supply Voltage
Typical Sensitivity
5.0
5.0
Sensitivity (mV/Gauss)
Sensitivity (mV/Gauss)
5.5
TA = +25 °C
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.6V
4.5
3.3V
4.0
3.0V
3.5
2.5V
3.0
2.5
1.8V
1.6V
2.0
1.5
1.0
0.5
3.8
-50
-30
-20
-10
0
10
20
30
40
Supply Voltage (V)
Temperature (oC)
Sensitivity vs Supply Voltage
Sensitivity vs Temperature
2.40
50
60
70
80
90
50
60
70
80
90
4.00
VDD = 1.8V
VDD = 3.0V
2.35
Sensitivity (mV/Gauss)
Sensitivity (mV/Gauss)
-40
2.30
1.8V
2.25
2.20
2.15
3.90
3.80
3.0V
3.70
3.60
3.50
2.10
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
-50
-40
-30
-20
-10
0
10
20
30
40
Temperature (oC)
Temperature (oC)
Sensitivity vs Temperature
Sensitivity vs Temperature
AH8503
Document number: DS37684 Rev. 1 - 2
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AH8503
Typical Operating Characteristics (cont.)
Output Voltage VOUTPUT (V)
2.0
1.8
1.8V
1.6V
-400
-300
-200
-100
0
100
200
300
400
1.6
VDD = 1.6V, TA = -40 °C to +85 °C
1.4
-40C
1.2
1.0
0C
0.8
25C
0.6
85C
0.4
0.2
0
-500
500
-400
-300
-200
-100
0
100
200
300
Magnetic Flux Density, B (Gauss)
Magnetic Flux Density, B (Gauss)
Output Voltage vs Magnetic Flux Density
Output Voltage vs Magntic Flux Density
3.5
1.6
1.4
-40C
1.2
0C
1.0
25C
0.8
0.6
85C
0.4
0.2
-400
Output Voltage VOUTPUT (V)
3.6V
3.3V
3.0V
VDD = 1.8V, TA = -40 °C to +85 °C
0
-500
Output Voltage VOUTPUT (V)
1.8
= +25 °C
-300
-200
-100
0
100
200
300
400
Output Voltage VOUTPUT (V)
3.9
3.6 TA
3.3
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
0.6
0.3
0.0
-500
2.5
-40C
2.0
0C
1.5
25C
1.0
85C
0.5
-400
-300
-200
-100
0
100
200
300
Magnetic Flux Density, B (Gauss)
Magnetic Flux Density, B (Gauss)
Output Voltage vs Magntic Flux Density
-40C
0C
25C
85C
100
200
300
400
500
3.9
VDD = 3.6V, TA = -40 °C to +85 °C
3.6
3.3
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
0.6
0.3
0
-500 -400 -300 -200 -100
0
25C
85C
100
200
300
Output Voltage vs Magntic Flux Density
Output Voltage vs Magntic Flux Density
13 of 19
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500
0C
Magnetic Flux Density, B (Gauss)
Document number: DS37684 Rev. 1 - 2
400
-40C
Magnetic Flux Density, B (Gauss)
AH8503
500
VDD = 3.0V, TA = -40 °C to +85 °C
Output Voltage vs Magntic Flux Density
3.6
VDD = 3.3V, TA = -40 °C to +85 °C
3.3
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
0.6
0.3
0
-500 -400 -300 -200 -100
0
400
3.0
0
-500
500
Output Voltage VOUTPUT (V)
Output Voltage VOUTPUT (V)
Typical Transfer Curves
400
500
February 2015
© Diodes Incorporated
AH8503
Typical Operating Characteristics (cont.)
Typical Null Voltage: Output Voltage at B = 0+ Gauss (Note 16)
2.1
B = 0+ Gauss, TA = +25 °C
B = 0+ Gauss
1.8
1.9
1.6
1.7
3.3V
1.5
3.0V
Null Voltage (V)
Null Voltage (V)
2.0
1.4
1.2
1.0
0.8
3.6V
1.3
2.5V
1.1
1.8V
0.9
1.6V
0.7
0.6
0.5
0.4
0.3
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
-50
-40
-30
-20
-10
10
20
30
40
50
60
70
80
90
50
60
70
80
90
Temperature (oC)
Supply Voltage (V)
Null Voltage vs Supply Voltage
0.920
0
Null Voltage vs Temperature
1.54
B = 0+ Gauss, VDD = 1.8V
B = 0+ Gauss, VDD = 3.0V
1.53
0.915
Null Voltage (V)
Null Voltage (V)
1.52
0.910
0.905
1.8V
0.900
0.895
1.51
1.50
3.0V
1.49
1.48
1.47
1.46
1.45
0.890
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
-50
-30
-20
-10
0
10
20
30
40
Temperature ( C)
Temperature ( C)
Null Voltage vs Temperature
Null Voltage vs Temperature
Note:
-40
o
o
16. Null voltage is the voltage with magnetic flux density B = 0G at the sensor. B = 0G is also the transistion point at VDD*127/128 for internal ADC and
DAC. To avoid the transition point fluctuation during measurement of null voltage, B = 0+ Gauss (e.g. 0.5G which is smaller than 1LSB gauss step of
3.125G) is used. See definition of the null voltage in application section.
AH8503
Document number: DS37684 Rev. 1 - 2
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AH8503
Typical Operating Characteristics (cont.)
Typical Null Voltage Offset: (Output Voltage - VDD/2) at B = 0+ Gauss (Note 16)
10.0
B = 0+ Gauss, TA = +25 °C
Null Voltage Offset (mV)
Null Voltage Offset (mV)
8.0
6.0
4.0
2.0
0.0
-2.0
-4.0
-6.0
-8.0
-10.0
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
-2.0
-4.0
-6.0
-8.0
-10.0
-12.0
-14.0
3.8
B = 0+ Gauss
1.6V
1.8V
2.5V
3.0V
3.3V
3.6V
-50
-40
-30
-20
-10
12.0
B = 0+ Gauss, VDD = 1.8V
Null Voltage Offset (mV)
Null Voltagte Offset (mV)
3.0
2.0
1.8V
1.0
0.0
-1.0
-2.0
-3.0
-4.0
-5.0
30
40
50
60
70
80
90
60
70
80
90
B = 0+ Gauss, VDD = 3.0V
10.0
8.0
6.0
4.0
2.0
0.0
-2.0
-4.0
3.0V
-6.0
-8.0
-10.0
-12.0
-6.0
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
-50
-40
-30
-20
-10
0
10
20
30
40
50
o
o
Temperature ( C)
Temperature ( C)
Null Voltage Offset vs Temperature
Null Voltage Offset vs Temperature
Note:
20
Null Voltage Offset vs Temperature
Null Voltage Offset vs Supply Voltage
5.0
4.0
10
Temperature (oC)
Supply Voltage (V)
6.0
0
16. Null voltage is the voltage with magnetic flux density B = 0G at the sensor. B = 0G is also the transistion point at VDD*127/128 for internal ADC and
DAC. To avoid the transition point fluctuation during measurement of null voltage, B = 0+ Gauss (e.g. 0.5G which is smaller than 1LSB gauss step of
3.125G) is used. See definition of the null voltage in application section.
AH8503
Document number: DS37684 Rev. 1 - 2
15 of 19
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February 2015
© Diodes Incorporated
AH8503
Ordering Information
Part Number
Package
Code
Packaging
AH8503-FDC-7
FDC
U-DFN2020-6
7” Tape and Reel
Quantity
Part Number Suffix
3,000/Tape & Reel
-7
Marking Information
(1)
Package Type: U-DFN2020-6
Part Number
AH8503-FDC-7
AH8503
Document number: DS37684 Rev. 1 - 2
Package
U-DFN2020-6
16 of 19
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Identification Code
KY
February 2015
© Diodes Incorporated
AH8503
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
(1)
Package Type: U-DFN2020-6
A1
A
A3
Seating Plane
D
D2
Pin #1 ID
E
E2
Z(4x)
U-DFN2020-6
Type C
Dim
Min
Max
Typ
A
0.57
0.63
0.60
A1
0.00
0.05
0.02
A3
0.15
b
0.25
0.35
0.30
D
1.95 2.075 2.00
D2
1.55
1.75
1.65
E
1.95 2.075
2.0
E2
0.86
1.06
0.96
e
0.65
L
0.25
0.35
0.30
Z
0.20
All Dimensions in mm
L
b
e
Bottom View
Sensor Location (TBD)
AH8503
Document number: DS37684 Rev. 1 - 2
17 of 19
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AH8503
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
(1)
Package Type: U-DFN2020-6
X2
X1
Dimensions Value (in mm)
C
0.650
X
0.350
X1
1.650
X2
1.700
Y
0.525
Y1
1.010
Y2
2.400
Y
Y2
Y1
X
AH8503
Document number: DS37684 Rev. 1 - 2
C
18 of 19
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AH8503
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
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indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
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This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
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representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2015, Diodes Incorporated
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Document number: DS37684 Rev. 1 - 2
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