DTL4A MURATA | Alldatasheet
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Figure 1. Simplifi ed Schematic
100 Watt, Electronic Loads
for easy pcb mounting and/or external heat-sink attachment. increment (0.024% of 10A) in load current. draws a mere 150mA (maximum). are outstanding building-block components for power-supply burn-in and test systems. con gure impressively accurate systems.
Performance Specifi cations and Ordering Guide➀ PART NUMBER STRUCTURE MECHANICAL SPECIFICATIONS Compliance Resolution Logic Current Resolution Voltage Power Package Model (Bits) Compatibility (Amps) (mA) ➁ (Volts) ➂ (Watts) (Case, Pinout) DTL4A 12 CMOS/TTL ➃ 0-10 2.44 2.5-150 0-100 C24, P31 Input Output DTL 4 DATEL Electronic Load Voltage Range: 4 = 2.5 to 150V A A-Series High Reliability TEMPERATURE DERATIN METAL CASE ALUMINUM BASEPLATE 2.00 (50.80) 2.00 (50.80)
0.20 MIN
(5.08) 1.20 (30.48) 6 EQ. SP . @ 0.200 (5.08) 1.800 (45.72) 1.640 (41.66) 1.640 (41.66) 0.50 (12.70) 0.060 ±0.002 DIA. (1.524 ±0.051) 0.040 ±0.002 DIA. (1.016 ±0.051) #4-40 CLEAR THRU (TYP . 4 PL) BOTTOM VIEW 0.10 (2.54) 0.08 (2.03) 0.22 (5.59) 0.40 (10.16) Pin Function P31 Pin Function P31
1 Fault 7 Control Strobe (CS)
2 Ground 8 –Load
3 +5 Volt Supply 9 –Load
4 Latch Data (LD) 10 +Load
5 Serial Data In (SDI) 11 +Load
6 Clock (CLK)
Contact DATEL for Heat Sink information. Output Power/Load (Watts) Baseplate Temperature (°C) 100 01 0 2 03 04 05 06 07 08 09 0 1 0 The horizontal axis of the above chart references the temperature of the DTL4A’s alumi- num baseplate. The device can continually dissipate up to 100 Watts if the baseplate is maintained at or below +50°C. At +25°C ambient temperature, with no heat sink or supplemental air fl ow, the DTL4A can reliably dissipate a continuous 10 Watts. Case C24 ➀ Typical at T A = +25°C with nominal +5V supply voltage unless noted. ➁ The smallest increment/decrement in output current is defi ned by one LSB (least signifi cant 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 10A or 2.44mA. ➂ 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 the minimum provide insuffi cient bias for the output stage and will result in unpredictable or no operation. See Output Compliance Voltage and the Fault Line for details. ➃ See Performance/Functional Specifi cations for details.
100 WATT, SERIAL-INPUT ELECTRONIC LOADS
Logic Compatibility (Pins 1, 4-7) CMOS/TTL Input Logic Levels: Logic "1" +2 Volts, minimum Logic "0" +0.8 Volts, maximum Input Logic Loading: Logic "1" (I IH @ VIH = 5 Volts) 20µA, maximum Logic "0" (I IL @ VIL = 0 Volts) –0.6mA, maximum Output Logic Levels: Logic "1" (@ 150µA) +3.5 Volts, minimum Logic "0" (@ 1.6mA) +0.4 Volts, maximum Timing See Timing Diagram Output Current: Range 0-10 Amps Resolution Accuracy ➅ ±1%, maximum Voltage Range ➁ 2.5-150 Volts Power Range 0-100 Watts Impedance 10MΩ , minimum Offset Error ➂ ±3mA, maximum Gain Error ±0.1%, maximum Isolation Voltage: Digital Inputs/Output to ±Load 500Vdc, minimum Any Pin to Case 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 defi ned by one LSB (least signifi cant 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 10A or 2.44mA. 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 the minimum provide insuffi cient 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 defi ned as the current sunk/sourced by the DTL4A’s output, under any output voltage conditions, when the digital input word is all "0's." ➃ Full scale step (10 Amps) settling to within ±2.44mA of its fi nal value. ➄ See Temperature Derating. ➅ Applies over all specifi ed ranges/combinations of load voltage/current, operating temperature, and V CC. 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 Y es (See Fault Line) Case Temperature +105°C Storage Temperature (Ambient) –40 to +125°C Lead Temperature (soldering, 10 sec.) +300°C Absolute Maximum Ratings 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 Specifi cations Table is not implied. Overview The DTL4A is a digitally programmable, CMOS/TTL-compatible, serial-input current sink. It’s output/load current range is 0 to 10 Amps (in 2.44mA increments), over a compliance voltage range of 2.5 to 150 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 9.99756 Amps. In a typical power-supply test or burn-in application, the output pins of the device under test (DUT) are connected to the DTL4A’s +Load (pins 10 and 11) and –Load (pins 8 and 9) outputs. The DTL4A’s operation is controlled by its four digital input lines (Serial Data In, Clock, Latch Data and Control Strobe). TECHNICAL NOTES MSB LSB DTL4A 1111 1111 1111 9.9976 1100 0000 0000 7.5000 1000 0000 0000 5.0000 0111 1111 1111 4.9976 0100 0000 0000 2.5000 0010 0000 0000 1.2500 0000 0000 0001 0.0024 0000 0000 0000 0.0000 Serial Input Data Word Load Current (Amps) Mapping of the Serial-Input Data to Load Current Performance/Functional Specifi cations Typical @ TA = +25°C with nominal +5V supply voltage, unless noted.
the CLK must be toggled through a low-to-high transition to register that bit. digital bits into the DTL4A’s input register. settle to its fi nal desired value.
- Initialize with Control Strobe, Latch Data, and Clock high:
- Bring the Control Strobe low.
- Apply the MSB (D11) of the serial data word to Serial Data In.
- Toggle the Clock high-low-high.
- Apply D10 of the serial data word to Serial Data In.
- Toggle the Clock high-low-high.
- Repeat the process for remaining data bits D9 through D0.
- Drive the Control Strobe high.
- Toggle the Latch Data input high-low-high.
disabled, the Fault line activates. an open-collector output (internal 10kΩ pull-up resistor to +5V). 150V, and operation above 150V can damage the device. allowed to experience a polarity reversal. ensures the DTL4A always sees at least 5 Volts across its outputs. higher-power DTL4A applications. Please contact us for details. (CLK, pin 6) with all signals present and stable for a minimum of 1µsec. Serial Data In (SDI, pin 5) line. Figure 2. An "Offset Supply" Enables
do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark. Figure 3. DTL4A Timing Diagram