ZXCT1022E5TA Diodes Zetex, ZXCT1022E5TA Datasheet - Page 6

• Manufacturer Part Number: ZXCT1022E5TA
• Description: IC CURRENT MONITOR 3% SOT23-5
• Manufacturer: Diodes Zetex

Specifications of ZXCT1022E5TA

• Function: Current Monitor
• Sensing Method: High-Side
• Accuracy: ±3%
• Voltage - Input: 2.5 ~ 20 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 5
• Mounting: Surface Mount
• Package Type: SOT-23
• Case Length: 3.1(Max)mm
• Screening Level: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Compliant
• Other names: ZXCT1022E5TATR

Application information
The ZXCT1022 has a fixed dc voltage gain of 100. No external scaling resistors are required for
the output. Output voltage is simply defined as:
Where V
PCB trace shunt resistor for low cost solution
Figure 1 shows a PCB layout suggestion for a low cost solution where a PCB resistive trace in
replacement for a conventional shunt resistor, can be used. The resistor section is 25mm x
0.25mm giving approximately 150m
required.
Total circuit solution: 1 component. Shows area of 150m
sense resistor compared to SOT23 package.
Practical tolerance of the PCB resistor will be around 5%
depending on manufacturing methods.
Issue 6 - March 2008
© Zetex Semiconductors plc 2008
V
OUT
SENSE
= 100 x V
= V
IN
- V
SENSE
LOAD
(V)
using 1 oz copper. Smaller resistances can be used if
6
Figure 1 PCB layout suggestion
GND
ZXCT1021/2
V
OUT
ZXCT1022
www.zetex.com
V
IN
Load