DTL2A-LC View Datasheet(PDF) - DATEL Data Acquisition products

Part Name

Description

MFG CO.

DTL2A-LC

100 Watt, Digitally Programmable Low-Voltage, Electronic Loads

DATEL Data Acquisition products  

1 2 3 4 5

100 WATT, LOW-VOLTAGE ELECTRONIC LOADS

DTL2A-LC Model

Performance/Functional Specifications

Typical @ TA = +25°C with nominal +5V supply voltage, unless noted.

Digital Inputs/Outputs

Logic Compatibility (Pins 1, 4-7)

CMOS/TTL

Input Logic Levels:

Logic "1"

Logic "0"

+2 Volts, minimum

+0.8 Volts, maximum

Input Logic Loading:

Logic "1" (IIH @ VIH = 5 Volts)

Logic "0" (IIL @ VIL = 0 Volts)

20µA, maximum

–0.6mA, maximum

Output Logic Levels:

Logic "1" (@ 150µA)

Logic "0" (@ 1.6mA)

+3.5 Volts, minimum

+0.4 Volts, maximum

Timing

See Timing Diagram

Output

Current:

Range

Resolution ➀

Accuracy ➅

0-20 Amps

0.024%FS (4.88mA)

±3%, maximum

Voltage Range ➁

0.6-50 Volts

Power Range

0-100 Watts

Impedance

10MΩ, minimum

Offset Error ➂

±10mA, maximum

Gain Error

±0.4%, maximum

Isolation Voltage:

Digital Inputs/Output to ±Load

Any Pin to Case

500Vdc, minimum

500Vdc, minimum

Isolation Resistance

100MΩ, minimum

Dynamic Performance

Output Slew Rate

±10A/µsec, minimum

Output Settling Time ➃

100µsec

Digital Input Update Rate

to 20kHz

Power Requirements

Power Supply Range (+VCC, Pin 3) +4.75-5.25 Volts (+5V nominal)

Power Supply Current

110mA typ., 150mA max.

Environmental

Operating Temperature ➄

–40 to +100°C (Case)

Storage Temperature

–40 to +125°C (Ambient)

Humidity (Non-condensing)

to 95%

Altitude Above Sea Level

10,000 feet

Physical

Dimensions

2" x 2" x 0.5" (51 x 51 x 12.7mm)

Shielding

6-sided (Connected to pin 2)

Case Material

Tin-plated steel shell with

aluminum baseplate

Pin Material

Brass, solder coated

Mounting Holes

Through-hole spacers, #4-40 clearance

Weight

1.9 ounces (54 grams)

➀ The smallest increment/decrement in output current is defined by one LSB (least significant

bit) of the 12-bit digital input word. One LSB is equal to full scale (FS) divided by 4096 which

corresponds to 0.0244% of 20A or 4.88mA.

➁ For proper operation, the unit's output/load voltage must remain within this range. Voltages

greater than the listed maximum can damage the device. Voltages less than than the

minimum provide insufficient bias for the output stage and will result in unpredictable or no

operation. See Output Compliance Voltage and the Fault Line for details.

➂ Offset error is defined as the current sunk/sourced by the DTL2A’s output, under any output

voltage conditions, when the digital input word is all "0's."

➃ Full scale step (20 Amps) settling to within ±5mA of its final value.

➄ See Temperature Derating.

➅ Applies over all specified ranges/combinations of load voltage/current, operating temperature,

and VCC.

Absolute Maximum Ratings

Power Supply Voltage (+VCC, Pin 3)

–0.5 to +5.5 Volts

Digital Input Voltage (Pins 4-7)

–0.5 to +5.5 Volts

Output Reverse-Polarity Protection No protection

Output Overvoltage Protection

No protection

Output Undervoltage Protection

Yes (See Fault Line)

Case Temperature

+105°C

Storage Temperature (Ambient)

–40 to +125°C

Lead Temperature (Soldering, 10 sec.) +300°C

These are stress ratings. Exposure of devices to any of these conditions may adversely

affect long-term reliability. Proper operation under conditions other than those listed in the

Performance/Functional Specifications Table is not implied.

TECHNICAL NOTES

Overview

The DTL2A-LC is a digitally programmable, CMOS/TTL-compatible, serial-

input current sink. It’s output/load current range is 0 to 20 Amps (in 4.88mA

increments), over a compliance voltage range of 0.6 to 50 Volts and an output/

load power range of 0 to 100 Watts. The device’s digital I/O coding is straight

binary (see table below). A digital input of all "0’s" forces a load current of 0

Amps. A digital input of all "1’s" forces a load current of 19.995 Amps.

In a typical power-supply test or burn-in application, the output pins of the

device under test (DUT) are connected to the DTL2A-LC’s +Load (pins 10 and 11)

and –Load (pins 8 and 9) outputs. The DTL2A-LC's operation is controlled by its

four digital input lines (Serial Data In, Clock, Latch Data and Control Strobe).

Serial Input Data Word

MSB

LSB

1111

1111

1111

1100

0000

0000

1000

0000

0000

0111

1111

1111

0100

0000

0000

0010

0000

0000

0000

0000

0001

0000

0000

0000

Load Current (Amps)

DTL2A

19.995

15.000

10.000

9.995

5.000

2.500

0.005

0.000

Mapping of the Serial-Input Data to Load Current

3

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