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PDF AH8500 Data sheet ( Hoja de datos )

Número de pieza AH8500
Descripción LOW POWER/MICROPOWER LINEAR HALL EFFECT SENSOR
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AH8500
LOW POWER/MICROPOWER
LINEAR HALL EFFECT SENSOR
Description
Pin Assignments
The AH8500 is a low power/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.
AH8500 has a typical sensitivity of 2.1mV/G and 3.55mV/G at 1.8V
and 3V. The typical null voltage offset is less than 1% of VDD. 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 AH8500
can operate over the supply range of 1.6V to 3.6V and uses an
externally controlled ENABLE pin clocking system to control operating
modes and sampling rates and to minimize the power consumption.
The typical average operating supply current is between 8.9µA during
“Sleep” mode and 1.16mA at maximum sampling rate 1.8V. With a
conversion pulse every 50ms at the ENABLE pin, the device achieves
a micropower operation with the power consumption of 22µW typical
at 1.8V supply.
To minimize PCB space the AH8500 is available in small low profile
U-DFN2020-6.
Features
Linear Hall Effect Sensor with +/-430G Sense Range and
Output Voltage with 8-bit resolution
Supply Voltage of 1.6V to 3.6V
Sensitivity: 2.1mV/G and 3.55mV/G at 1.8V and 3V at +25oC
Low Offset Voltage
Low Average Supply Current
8.9µA Typical in Sleep Mode (Default) at 1.8V
1.01mA Typical in Auto-Run Mode ( 6.25kHz) at 1.8V
12µA Typical in External Drive Mode with 20Hz Sample
Rate at 1.8V
1.16mA Typical in External Drive Mode with 7.14kHz
Sample 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)
(Top View)
OUTPUT 1
6 NC
NC 2
5 GND
VDD 3
Exposed
Pad
4 ENABLE
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
Contact-Less Level, Proximity and Position Measurement in
Home Appliances and Industrial Applications
Notes:
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.
AH8500
Document number: DS37511 Rev. 1 - 2
1 of 19
www.diodes.com
February 2015
© Diodes Incorporated

1 page




AH8500 pdf
AH8500
Electrical Characteristics (cont.) (@TA = +25°C, VDD = 1.8V, unless otherwise specified.)
ENABLE Pin Timing, Conversion Rate and IDD Supply Current Relationship
AH8500 ENABLE Pin Clocked
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
OUT
Tclk
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 ENABLE pin clocked at maximum (~7.14 kHz): IDD = 1.35 mA*12/14+8.93µA*2/14 ≈ 1.16mA
(2) If ENABLE pin clocked at 20Hz: IDD ≈ 12µA
(3) If ENABLE clocking period =T, IDD = 1.35mA*120µs/T + 8.93µA*(T-120µs)/T
AH8500 ENABLE = Logic High (VDD) Continuously – Auto-Run 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 29 30 31
EN
OUT Tclk
TCONV
DATA0
Status
AWAKE(ON)
SLEEP
AWAKE(ON)
ICC
1.35mA
8.9µA
Tclk: internal clock period, typical= 10µs
TCONV: One sample/conversion period when ENABLE = High (VDD )= 16*Tclk=160µs
IDD ( @ VDD = 1.8V, 25oC):
IDD = 1.35mA*120µs/160µs + 8.93µA*40µs/160µs ≈ 1.01mA (typical)
1.35mA
DATA1
SLEEP
8.9µA
AH8500
Document number: DS37511 Rev. 1 - 2
5 of 19
www.diodes.com
February 2015
© Diodes Incorporated

5 Page





AH8500 arduino
Typical Operating Characteristics
Average Supply Current
Sleep Mode
16.0
ENABLE = GND, TA = +25 C,
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8
Supply Voltage (V)
Average Supply Current (ENABLE = GND) vs Supply Voltage
AH8500
Sleep Mode
16.0
ENABLE = GND
14.0
12.0
10.0
8.0
6.0
3.6V
3.3V
3.0V
2.5V
1.8V
1.6V
4.0
2.0
0.0
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Temperature (oC)
Average Supply Current (ENABLE = GND) vs Temperature
External Drive Mode - 20Hz Sample Rate
22.0
20.0 ENABLE = 140µs pulse 20Hz PWM, TA = +25 C
18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8
Supply Voltage (V)
Average Supply Current (ENABLE = PWM) vs Supply Voltage
External Drive Mode - 20Hz Sample Rate
22.0
ENABLE = 140µs pulse 20Hz PWM
20.0
18.0 3.6V
16.0 3.3V
3.0V
14.0 2.5V
12.0 1.8V
10.0 1.6V
8.0
6.0
4.0
2.0
0.0
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Temperature (oC)
Average Supply Current (ENABLE = PWM) vs Temperature
Auto-Run Mode - 6.25kHz Sample Rate
2.6
2.4 ENABLE = VDD , TA = +25 C
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8
Supply Voltage (V)
Average Supply Current (ENABLE = VDD) vs Supply Voltage
Auto-Run Mode - 6.25kHz Sample Rate
2.6
2.4 ENABLE = VDD
2.2 3.6V
2.0 3.3V
1.8 3.0V
1.6 2.5V
1.4
1.2 1.8V
1.0 1.6V
0.8
0.6
0.4
0.2
0.0
-50 -40 -30 -20
-10
0
10 20 30 40 50 60 70 80 90
Temperature (oC)
Average Supply Current (ENABLE = VDD) vs Temperature
AH8500
Document number: DS37511 Rev. 1 - 2
11 of 19
www.diodes.com
February 2015
© Diodes Incorporated

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