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Atlas DCA Pro - Advanced Semiconductor Analyser (Model DCA75)

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Building on the continued success of Peak's existing component identification and analysis instruments, the DCA Pro brings an array of exciting new features for the hobbyist and professional alike. 

Key Features
The DCA Pro is an advanced new design that features a graphics display, USB communications, PC Software and an enhanced component identification library.

- Automatic component type identification.
- Automatic pinout identification (connect any way round).
- The DCA Pro supports all the components that the popular Peak Atlas DCA55 supports, but adds plenty more. Components supported include:
- Transistors (including Darlingtons), Silicon and Germanium types. Measures gain, Vbe and leakage.
- MOSFETs, enhancement mode and depletion mode types. Measure on-threshold (at 5mA) and approx transconductance (for span of 3mA-5mA).
- JFETs, including normally off SiC types. Measures pinch-off voltage (at 5uA) and approx transconductance (for span of 3mA-5mA).
- IGBTs (insulated gate bipolar transistors). Measures on-threshold (at 5mA).
- Diodes and Diode networks.
- LEDs and bicolour LEDs (2 lead and 3 lead types).
- Zener Diodes with measurement of zener voltage up to 9V at 5mA.
- Voltage regulators (measures regulation voltage, drop-out voltage, quiescent current).
- Triacs and Thyristors that require less than 10mA of gate current and holding current.

Stand-alone or with a PC
The instrument can be used stand-alone or connected to a PC. Either way, the DCA Pro will automatically identify the component type, identify the pinout and also measure a range of component parameters such as transistor gain, leakage, MOSFET and IGBT threshold voltages, pn characteristics and much more.

Curve Tracing 
When connected to a PC using the supplied USB cable, a range of low current curve-tracing functions can be performed. Various graph types are available, with more to follow: 
- Bipolar transistor output characteristics, IC vs VCE.
- Bipolar transistor gain characteristics, hFE vs VCE.
- Bipolar transistor gain characteristics, hFE vs IC.
- MOSFET and IGBT output function, ID vs VDS.
- MOSFET and IGBT transfer function, ID vs VGS.
- JFET output function, ID vs VDS.
- JFET transfer function, ID vs VGS.
- Voltage regulator, VOUT vs VIN.
- Voltage regulator, IQ vs VIN.
- PN junction I/V curves, forward and reverse options (for Zener diodes).

Curve tracing is performed using test parameters in the range of +/-12V or +/-12mA. All curve-tracing data can be instantly pasted into Excel© for further graphing and analysis. PC Software is included with the DCA Pro on a Peak USB memory stick. Software suitable for Windows XP, Vista, Windows 7, 8 and 10 (all 32 or 64 bit).

Parameter Min Typ Max Note
Bipolar Transistors        
Measurable current gain (hFE) range 2   32000 2
hFE accuracy (hFE<2000) ±3% ±5 hFE 2,8
hFE test voltage (VCEO) 3.0V   9.0V 2
hFE collector test current 4.75mA 5.00mA 5.25mA  
Base current for VBE measurement 4.75mA 5.00mA 5.25mA  
VBE accuracy ±1% ±0.006V 8
VBE resolution   3.0mV 6.0mV  
VBE for Darlington identification 0.95V 1.00V 1.80V 3
VBE for Darlington (shunted types) 0.75V 0.80V 1.80V 4
VBE threshold for germanium   0.55V    
Acceptable VBE     1.80V  
Base-emitter shunt threshold 50kΩ 60kΩ 70kΩ  
Acceptable collector leakage     1.5mA 6
Leakage current accuracy ±2% ±0.02mA  
Enhancement mode VGS(ON) range 0.0V   10.0V 5
Depletion mode VGS(ON) range -5.0V   0.0V 5
VGS(ON) accuracy ±2% ±0.01V 5
Drain current at VGS(ON) 4.75mA 5.00mA 5.25mA  
Drain-Source voltage at VGS(ON) 3.5V   9.0V 5
Acceptable gate-source resistance 8kΩ      
IGBT collector saturation threshold   0.40V   9
Pinch-off VGS(OFF) range -10.0V   2.5V  
Pinch-off drain-source current 4.5μA 5.0μA 5.5μA  
Turn-on VGS(ON) range -9.0V   2.5V  
Turn-on drain-source test current 4.75mA 5.00mA 5.25mA  
VGS accuracy ±2% ±0.01V  
Transconductance (gfs) range     99mA/V  
gfs test drain current span 3.0mA to 5.0mA  
gfs accuracy (<20mA/V) ±5% ±2mA/V  
gfs accuracy (<20mA/V) ±10% ±5mA/V  
Parameter Min Typ Max Note
Thyristors and Triacs        
Gate trigger test current 8.0mA 10.0mA 12.0mA 7
Load hold test current   10.0mA 15.0mA  
Diodes and LEDs        
Diode forward test current 4.75mA 5.00mA 5.25mA  
Diode forward voltage accuracy ±1% ±0.006V  
Acceptable VF for a diode @ 5mA 0.15V      
VF for LED identification 1.5V   4.0V  
Zener Diodes        
Zener voltage range at 5mA 1.8V   9.0V  
Zener voltage range below 5mA   9.0V 12.0V  
Zener diode test current 0.50mA 5.00mA 5.25mA  
Voltage Regulators        
Input test voltage range (IQ<3.0mA) 1.1V   10.0V  
Input test voltage range (IQ<5.0mA)     8.0V  
Quiescent current range (IQ) 0.00mA   5.00mA  
Quiescent current accuracy ±2% ±0.02mA  
Dropout voltage range (VDO) 0.0V   3.0V  
Dropout voltage accuracy ±2% ±0.02V  
Output voltage accuracy ±1% ±0.006V  
Load test current 0.13mA   1.25mA  
General Parameters        
Peak test current into S/C -15.5mA   15.5mA 1
Peak test voltage across O/C -13.5V   13.5V 1
Short circuit threshold 10Ω 20Ω 1
Battery type (x1) Alkaline AAA, LR03, MN2400
Battery voltage range 1.0V 1.5V 1.6V  
Battery warning threshold   1.0V    
USB current consumption 500mA pk active. ≤2mA sleep
Dimensions (body) 103 x 70 x 20 mm  
  4.1" x 2.8" x 0.8"  
Operating temperature range 10°C   40°C 10
  50°F   104°F 10
1. Between any pair of test clips.
2. Collector current of 5.0mA. Gain accuracy valid for gains less than 2000.
3. Resistance across reverse biased base-emitter > 60kΩ.
4. Resistance across reverse biased base-emitter < 60kΩ.
5. Load current of 5.0mA.

6. Collector-emitter voltage of 10.0V.
7. Thyristor quadrant I, Triac quadrants I and III.
8. BJT with no shunt resistors.
9. Load current typically 10.0mA.
10. Subject to acceptable LCD visibility.