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GMW
GMW
955 Industrial Road, San Carlos, CA 94070 Tel: (650) 802-8292 Fax: (650) 802-8298
E-mail: sales@gmw.com Web Site: www.gmw.com
GMW
GMW
Current sensing with the Sentron CSA-1V Hall IC
Revision Date: 2 May, 2005, CSA_APP_KIT_DESCRIP
955 Industrial Road, San Carlos, CA 94070 Tel: (650) 802-8292 Fax: (650) 802-8298
E-mail: sales@gmw.com Web Site: www.gmw.com
GMW
1 A_OUT, analog sensor output
2 VDD pos. supply voltage
3 Not connected
4 PV, programming voltage 1)
5 GND, supply common
6 PD, programming data 1)
7 PC, programming clock 1)
8 CO_OUT, common output
Note 1: Used for factory programming
The CSA-1V is a single-axis, integrated magnetic eld sensor based on the Hall
Effect. The circuit is fabricated using a conventional CMOS technology with an additional
ferromagnetic layer. The ferromagnetic layer is used as a magnetic ux concentrator
providing a high magnetic gain. Therefore,
the circuit features very high magnetic
sensitivity, low offset, and low noise.
The CSA-1V is packaged in a standard
SOIC-8 full plastic package. This package
provides high voltage isolation to the
current conductor on the PCB (up to 600V)
FEATURES:

Sensitive to a magnetic eld parallel to the chip surface

Very high sensitivity

Linear output voltage proportional to a magnetic eld

Wide-band: DC to 100kHz

Very low offset and offset-drift

Very low noise

Isolated from current conductor

Surface mount SOIC-8 package

Single +5 Volt Supply GMW
955 Industrial Road, San Carlos, CA 94070 Tel: (650) 802-8292 Fax: (650) 802-8298
E-mail: sales@gmw.com Web Site: www.gmw.com
GMW
APPLICATION ENGINEERING KITS
GMW offers nine different Application Engineering Kits to assist our customers to quickly
evaluate the CSA-1V at various current ranges . Current ranges from milliamps up to
1000s of amps can be sensed by the CSA-1V when properly congured.
AN_115KIT

Low Current - mA to 1A RMS

Bi-directional

High Dielectric Isolation

This kit is ideal for evaluating low current and high voltage isolation applications. Sensitivity
depends on the number of turns of magnet wire on the bobbin (approx 30mV/amp-turn).
Kit Includes:

PCB assembly with CSA-1V (PCB size: 0.5 x 0.75 x 0.06)

Nylon Bobbin

Mating connector

Spare CSA-1V-SO

Instruction sheet
AN_116KIT

Low current - Less than 2A RMS

Peak Current 5A for < 1 sec

Sensitivity 460 mV/A

Large differential output voltage - +/- 5 Volts

High immunity to stray elds
This kit is useful in evaluating the sensing of low currents on PCBs. The kit has a CSA
on top and another one directly under it on the other side of the board. The differential
output is measured between the two ICs. Common mode magnetic elds are cancelled
out.
Kit includes:

PCB assembly with 2 CSA-1Vs (PCB size: 0.5 x 0.75 x 0.06)

Mating connector

Spare CSA-1V-SO

Instruction sheet
AN_120KIT

Mid current range - 0 to 8A RMS

Peak current, 50A for < 1 sec

Bi-directional

Sensitivity 38 mV/A
This kit is useful in evaluating the sensing of current in traces directly under the IC for
mid range currents. Current is limited by the trace width and copper thickness.
Kit includes:

PCB assembly with CSA-1V. (PCB size: 0.5 x 0.75 x 0.06)

Mating connector

Spare CSA-1V-SO

Instruction Sheet GMW
955 Industrial Road, San Carlos, CA 94070 Tel: (650) 802-8292 Fax: (650) 802-8298
E-mail: sales@gmw.com Web Site: www.gmw.com
GMW
AN_118KIT

Mid current range 0 to 8A RMS

Peak current 22A < 1 sec

Bi-directional

Sensitivity 110 mV/A
This kit has more sensitivity than the standard AN_120 and is the preferred con gura-
tion for this current range if installing a thru-hole jumper is an acceptable assembly
process.
Kit includes:

PCB assembly with CSA-1V. (PCB size: 0.5 x 0.75 x 0.06)

Mating connector

Spare CSA-1V-SO

Instruction sheet
AN_128KIT


Mid current range - 0 to 8 amps RMS

Peak current 22A < 1 sec

High sensitivity 220 mV/A

Large differential output voltage - +/- 5 Volts

High Immunity to stray elds
This kit is useful for evaluation a sensing con guration where high sensitivity and
high immunity to stray elds is desired. The output is a differential output and can
provide a large voltage swing of+/- 5 volts for bi-directional current or 0-5 volts for
DC currents
Kit includes:

PCB assembly with CSA-1V. (PCB size: 0.5 x 0.75 x 0.06)

Mating connector

Spare CSA-1V-SO

Instruction sheet
AN_123KIT

Higher current range 0 to 25A RMS

Peak current 50A < 1 sec

Bi-directional

Sensitivity 44 mV/A
This kit is useful for evaluating sensing higher currents on the PCB. This kit demon-
strates the use of mini bus bar over the top of the IC.
Kit includes:

PCB assembly with CSA-1V. (PCB size: 0.5 x 0.75 x 0.06)

Mating connector

Application note

Spare CSA-1V-SO

Spare Mini bus bar
AN_117KIT

Moderately High Currents - 0 to 40A RMS

Peak current 100A < 1 sec

Bi-directional

Sensitivity without concentrator 15 mV/amp

Sensitivity with concentrator 30 mV/amp
This kit is a four layer PCB with a wide current trace on the three bottom layers to al-
low for higher currents on the PCB. The optional magnetic concentrator increases the
sensitivity and the immunity to stray elds.
Kit includes:

PCB assembly with CSA-1V. (PCB size: 0.5 x 0.75 x 0.06)

Mating connector

Terminating hardware and optional magnetic concentrator

Spare CSA-1V-SO

Instruction sheet GMW
955 Industrial Road, San Carlos, CA 94070 Tel: (650) 802-8292 Fax: (650) 802-8298
E-mail: sales@gmw.com Web Site: www.gmw.com
GMW
AN_119KIT

External wire current sensing- No limit on current

Bi-directional

Sensitivity 60 mV/(d+0.3)A, where d=distance between center of wire and
top surface of IC in mm.
This kit is ideal for sensing currents in wires. The sensitivity is dependant on the diam-
eter of the wire and thickness of the insulation. Any wire size can be used in this applica-
tion. Sensitivity can be increased by making a wrap around the sensor.
Kit includes:

PCB assembly with CSA-1V. (PCB size: 0.5 x 0.75 x 0.06)

Nylon tie wrap

Mating connector

Spare CSA-1V-SO

Instruction sheet
AN_121KIT

Very High Current in Bus Bar and Flat conductors

Bi-directional
This kit is useful in sensing currents in bus bars and at conductors. Sensitivity depends
on the width and thickness of the conductor. Increasing the width and thickness decreases
the sensitivity. Currents in the range of 100s of amps to thousands of amps can be
sensed. By installing two kits, one each side of the bus bar and taking the differential
output from the two kits, the effect of background elds is reduced.
Kit Includes:

PCB assembly with CSA-1V. (PCB size: 0.5 x 0.75 x 0.06)

#8-32 Nylon screw

Mating connector

Spare CSA-1V-SO
PRICING
CSA-1V Application Engineering Kits. Speciy the Model Number

$30.00 ea
CMOS Linear Current IC (SOIC-8 form) Standard factory programmed devices
1




CSA-1V-SO
One-axis high sensitivity Hall sensor





$4.95 ea
Quantity discount schedule (SOIC-8 form) Standard factory programmed devices
1
Quantity
10/49 50/99 100/499 500/999 1k /2.59k 2.6k/5.2k
2
5.2k/ 10.4k
2


0% 11%
21%
31%
40%
59% 64%
Unit Price
$4.95 $4.41 $3.91 $3.42 $2.97 $2.03 $1.78
10 piece minimum order for all Hall Integrated Circuits.
Note 1) Standard parts are factory programmed to the specications shown in the 2SA-10 and CSA-1V spec sheets.
Note 2) Quantities of 2600 pcs and higher ship in 13 2600 pc tape and reel increments