LJTick-OutBuff (LJTOB) 는 Labajck 제품의 DAC 출력의 전류 출력을 증가시키는 제품입니다.

LJTick-OutBuff 는 또한 스위칭 3.3V 로직에 대해 제품의 디지탈 I/O 라인의 출력을 증가 시킬 수 있습니다.

LabJack 제품은 DAC0 와 DAC1 아날로그 출력에 대해 15 mA 이상 출력할 수 없습니다. 이 악세서리는 사용자에게 출력을 증가 시킬 수 있도록 도울 수 있습니다.

일반적인 응용의 대표적 예는 저전압 DC 모터의 속도 제어 입니다.

• Drives up to 200mA
• 0-5V output range*

* Max voltage depends on the supplied VS line which is 5V nominally.

Common Applications

• Controlling LEDs
• Generating variable stable excitation voltages

Figure 1: LJTick-OutBuff

Figure 2: LJTick-OutBuff with U3-LV

Screw Terminal Descriptions

VS: This is the same 5 volt output as the VS terminals on the LabJack itself. This is an output terminal, not an input. It can be used to provide 5 volt (nominal) power as needed.

GND: Same as LabJack ground (GND).

OBA/OBB: These output lines are generated by the Op Amp and track the input voltage.

 

LJTick-OutBuff Hardware Block Diagram

Figure 3: LJTick-OutBuff Hardware Block Diagram

 

LJTick-OutBuff Hardware Block Diagram with Filter

Figure 3: LJTick-OutBuff Hardware Block Diagram with Filter

 

LJTick-OutBuff Schematic

Figure 3: LJTick-OutBuff Schematic

 

Specifications

Parameter	Conditions	Min	Typ	Max	Units
Supply Voltage (VS)		2.5		6	V
Supply Current	No Load		1.0		mA
Operating Temp		-40		85	Deg C
Max Output Current			±320		mA
Short-Circuit Current			800		mA
Max Output Voltage	10 mA	VS - 0.3	VS - 0.04		V
	200 mA	VS - 0.55	VS - 0.4		V
Min Output Voltage	10 mA		0.03	0.1	V
	200 mA		0.38	0.6	V
Offset Error			175	3500	μV
Gain Error					%
Output Noise
Slew Rate or RC
Cutoff Frequency (1)			39		kHz
Capacitive Drive (2)				1	nF

(1) Calculated by passing a 0-5V sine wave and measuring the input/output to get a -3dB difference.
(2) Capacitive loads beyond 1 nF might cause the output to oscillate. Add a 20 Ω series resistor to prevent this.

For more specifications about the Op Amp used in the LJTick-OutBuff refer to the Texas Instruments TLV4112 datasheet.