Texas Instruments manual Rev. A, SLOP130 Rev A THS3001 EVM Board, General Information

Description

Figure 1±2. THS3001 Rev. A Evaluation Module

	J1
	±VCC		+VCC
J2	C1	GND	C2

Rev. A

±IN

GND INVERTING

NONINVERTING

+IN

GND

J3

R2

R1

R3

+	+	TEXAS
		INSTRUMENTS
	R4	J4
		C3

U1	R5
	C4	OUT
	GND

SLOP130 Rev A

THS3001 EVM Board

The THS3001 EVM is equipped with both noninverting and inverting inputs. The noninverting input is set for a gain of 2 and the inverting input is set for a gain of 1. Each input is terminated with a 50-Ωresistor to provide correct line impedance matching (Figure 1±3 for original version and Figure 1±4 for Rev. A). The amplifier IC output is routed through a 50-Ωresistor both to provide correct line impedance matching and to help isolate capacitive loading on the output of the amplifier. Capacitive loading directly on the output of the IC decreases the amplifier's phase margin and can result in peaking or oscillations.

Figure 1±3. THS3001 EVM Schematic ± Original Version

		C2	VCC		+
		0.1 μF
			R1		C1
				6.8 μF/35 V
	J1		1 k Ω
Non-		3	7
Inverting			+
						J2
Input
		R3	U1		6	R2
		49.9 Ω	THS3001			Output
		2	±			49.9 Ω
	J3	R5	4
Inverting		1 k Ω
Input		R4	C4		C3
				+	6.8 μF/35 V
		49.9 Ω	0.1 μF

±VCC

General Information 1-3