Cosemitech
Automotive Product Group
FEATURES and FUNCTIONAL DIAGRAM
CHI612
This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
Preliminary Datasheet REV 0.5
PACKAGE
Linear Hall, customer programmable, high resolution offset
and sensitivity trimming with EEPROM
Programmable sensitivity range between 1 and 24mV/G
Factory programmed sensitivity and quiescent output voltage
TC with extremely stable temperature performance
Temperature stable quiescent voltage output and sensitivity
Extremely low noise and high resolution
TO-92S
TO-94
120kHz bandwidth achieved with optimized chopper
stabilization techniques
Under-voltage protection
Output voltage clamp provides short circuit diagnostic
Output spiking suppress during fast current step inputs
Wide temperature range: -40
o
C to 150
o
C
SOT-89-3L
Lead Free Package: Flat TO-92, TO-94, SOT-89-3L
High ESD Protection
APPLICATIONS
RoHS Compliant 2011/65/EU
Industrial, Home appliances
Current sensing
Motor control
Linear Position Detection
Rotary Position Sensing
Magnetic Encoder
Ferrous metal sensing
Liquid level sensing
Vibration sensing
Weight sensing
DESCRIPTION
The CHI612 is a customer programmable, low noise high accuracy linear Hall effect-based sensor IC.
It is packaged in subminiature package to allow for easy integration with a magnetic core to create a
highly accurate current sensing module. The programmable nature of the CHI612 enables it to account
for manufacturing tolerances in the final current sensing module assembly.
These ratiometric Hall effect sensor ICs provide a voltage output that is proportional to the applied
magnetic field. The quiescent voltage output is user adjustable around 50% of the supply voltage and the
output sensitivity is programmable within a range of 1 mV/G to 24 mV/G.
This temperature-stable device is available in a through-hole single in-line package (TO-92S). The
accuracy of the device is enhanced via programmability on the OUT pin for end of-line optimization
without the added complexity and cost of a fully programmable device. The device using EERPOM to
optimize device sensitivity and the quiescent output voltage (QVO) (output with no magnetic field) for a
given application or circuit. The CHI612 also allow for optimized performance over temperature through
programming the temperature coefficient for both Sensitivity and QVO at end of line test.
The features of this linear device makes it ideal for use in industrial applications requiring high
accuracy and are guaranteed over a wide temperature range, –40°C to+150°C.
Table of Contents
Page 1/18
Confidential ---
Cosemitech
Automotive Product Group
CHI612
. This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
Preliminary Datasheet REV 0.5
1. Product Family Members .............................................................................................................. 3
2.
Pin Definitions and Descriptions
.............................................................................................. 3
3. Absolute Maximum Ratings .......................................................................................................... 4
4.
ESD Protections
......................................................................................................................... 4
5.
Function Description
.................................................................................................................. 4
6.
Transfer Characteristics
............................................................................................................ 5
7.
Parameters Specification
.......................................................................................................... 5
8. Application Information ................................................................................................................. 9
9. Package Information ................................................................................................................... 14
Page 2/18
Cosemitech
Automotive Product Group
1. Product Family Members
Part Number
CHI612TB
CHI612ER
CHI612FB
Marking ID
CI612
CI612
CI612
Description
CHI612
This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
Preliminary Datasheet REV 0.5
Linear Hall sensor IC, flat, TO-92S package, bulk packing (1000 units
per bag)
Linear Hall sensor IC, SOT-89-3L package, tape and reel packing (1000
units per reel)
Linear Hall sensor IC, flat, TO-94 package, bulk packing (1000 units per
bag)
Package Mark Description:
2. Pin Definitions and Descriptions
TO-92S
(T)
1
3
2
SOT-89-3L
(E)
1
3
2
TO-94
(E)
1
2
3
4
Name
VDD
OUT
GND
GND
Type
Supply
Output
Ground
Ground
Function
Supply Voltage pin
Open Collector Output pin
Ground pin, (it is no connection
pin for TO-94 package)
Ground pin,
TO-92S
TO-94
SOT-89-3L
Page 3/18
Confidential ---
Cosemitech
Automotive Product Group
3. Absolute Maximum Ratings
Parameter
Supply Voltage
Reverse Supply Voltage
Output Voltage
Reverse Output Voltage
Output Source Current
Output Sink Current
Maximum Number of EEPROM Write
Cycles
Operating Ambient Temperature
Storage Temperature
Junction temperature
CHI612
. This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
Preliminary Datasheet REV 0.5
Symbol
V
CC
V
RCC
V
IOUT
V
RIOUT
Iout(source)
Iout(sink)
EEPROM(max)
T
A
T
S
T
J(max)
Min
-
-0.1
-
-0.1
Max
6
-
6
-
2
10
100
Units
V
V
V
V
mA
mA
Cycles
°C
°C
°C
-40
-65
150
165
165
Magnetic Flux
B
No Limit
Gauss
Note: Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-
maximum- rated conditions for extended periods may affect device reliability.
4. ESD Protections
Parameter
All pins
1)
All pins
2)
All pins
3)
1) HBM (Human Body Mode) according to AEC-Q100-002
2) MM (Machine Mode) according to AEC-Q100-003
3) CDM (charged device mode) according to AEC-Q100-011
Value
+/-8000
+/-500
+/-750
Unit
V
V
V
5. Function Description
The Cosemitech™ CHI612 programmable linear Hall-effect current sensor IC has been designed
to achieve high accuracy and resolution without compromising bandwidth. The goal is achieved
through new proprietary linearly interpolated temperature compensation technology that is
programmed at the Cosemitech factory and provides sensitivity and offset that are virtually flat across
the full operating temperature range. Temperature compensation is done in the digital domain with
integrated EEPROM technology, without sacrificing the analog signal path 120 kHz bandwidth, making
this device ideal for inverter, DC-to-DC converter, and home electric applications.
This ratiometric Hall-effect sensor IC provides a voltage output that is proportional to the applied
magnetic field. The customer can configure the sensitivity and quiescent (zero field) output voltage
through programming on the VCC and output pins, to optimize performance in the end application.
The quiescent output voltage is user-adjustable around 50% of the supply voltage, VCC , and the
output sensitivity is adjustable within the range of 1 to 24 mV/G.
The sensor IC incorporates a highly sensitive Hall element with a BCD interface integrated circuit
that employs a low noise small-signal high-gain amplifier, a clamped low-impedance output stage, and
a proprietary, high bandwidth dynamic offset cancellation technique. These advances in Hall-effect
technology work together to provide an industry leading sensing resolution at the full 80 kHz
bandwidth.
Device parameters are specified across an extended ambient temperature range: –40°C to 150°C.
The CHI612 sensor IC is provided in subminiature package that is lead (Pb) free, with 100% matte tin
lead frame plating.
Page 4/18
Cosemitech
Automotive Product Group
6. Transfer Characteristics
CHI612
This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
Preliminary Datasheet REV 0.5
7. Parameters Specification (Valid through the full range of TA ,
CBYPASS=100nF, VCC = 5 V, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min
Typ.
Max
Units
ELECTRICAL CHARACTERISTICS
V
CC
I
CC
t
PO
V
UVLOHI
V
UVLOLOW
V
z
BW
i
f
C
Supply Voltage
Supply Current
Power-On Time
2
Under voltage Threshold
Supply Zener Clamp Voltage
Internal Bandwidth
Chopping Frequency
3
No load on V
OUT
T
A
= 25°C, C
L(PROBE)
=
10pF
T
A
= 25°C, V
CC
rising
T
A
= 25°C, V
CC
falling
T
A
= 25°C, I
CC
= 30mA
Small signal –3 dB
T
A
= 25°C
(Programmable)
4.5
–
–
2.8
2.5
6
–
–
5
7
30
2.9
2.6
7.3
120
500
1000
5.5
10
–
3
2.7
–
V
mA
µs
V
V
V
kHz
kHz
OUTPUT CHARACTERISTICS
V
CLP(HIGH)
Output Voltage
V
CLP(LOW)
Clamp Disable Bit
V
SAT(HIGH)
Output Saturation
V
SAT(LOW)
V
N
V
NRMS
Output Referred Noise
5
Voltage
2
T
A
= 25°C, R
L(PULLDWN)
=
10 kΩ to GND
T
A
= 25°C, R
L(PULLDWN)
=
10 kΩ to VCC
T
A
= 25°C, CL = 1 nF
4.8
–
–
Clamp
4
T
A
= 25°C, R
L(PULLDWN)
=
10 kΩ to GND
T
A
= 25°C, R
L(PULLUP)
=
10 kΩ to VCC
4.55
–
–
1
–
–
1*Sens
init
1.5
–
0.2
–
0.45
V
V
Bit
V
V
mV
p-p
mG/√(Hz)
Input Referred Noise Density T
A
= 25°C, No load,
f<<BWi
Page 5/18
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