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The THS3491IDDAR is a 900MHz, 500mA high-power output current feedback amplifier whose high power output and low distortion feature make it widely used in communications, test equipment, instrumentation, and industrial control systems requiring high-precision amplification ‌.

The THS3491IDDAR mainly has the following characteristics:

• Bandwidth:

-900 MHZ (VO = 2VPP, AV = 5V/V)

-320 MHZ (VO = 10VPP, AV = 5V/V)

• Pressure swing rate: 8000V/µs (VO = 20VPP)

• Input voltage noise: 1.7nV/√Hz

• Bipolar power supply voltage range: ±7V to ±16V

• Single power supply voltage range: 14V to 32V

Output swing: 28VPP (±16V power supply, 100Ω load)

• Linear output current: ±420 mA (typical value)

16.8mA trimmed power supply current (low temperature coefficient)

• HD2 and HD3: Less than -75 DBC (50MHz, VO =10VPP, 100Ω load)

• Ascent and descent time: 1.3ns (10V step)

• Overshoot: 1.5% (10V step, AV = 5V/V)

Current limiting and thermal shutdown protection

• Turn-off feature

Explanation

The THS3491IDDAR current feedback Amplifier (CFA) offers superior performance for applications that achieve the lowest distortion at high output power levels ranging from DC to over 100MHz (with a load of 100Ω). Although the rated gain of this current feedback design is 5V/V, it can maintain almost constant bandwidth and distortion over a wide gain range.

A slew rate of 8000V/µs can provide a 10V PP output for demanding loads at a low distortion and a frequency of 100MHz. The 900MHz, small-signal bandwidth can provide a low overshoot of less than 1.5% with a 10V step and a rise and fall time of less than 1.3ns. A peak output current drive value greater than 500mA can drive high-capacitance loads with a fast signal.

Compared with the traditional THS3091 or THS3095 options, the lower output margin of the THS3491IDDAR can provide a larger output swing at the same ±15V power supply.

Application scenarios

The THS3491IDDAR is suitable for application scenarios requiring high power output, including:

High-voltage arbitrary waveform generator

Signal generator for LCD tester

Output driver for LCR meters

• Power FET driver

High-capacitive load piezoelectric element driver

• VDSL line driver

Upgrade the THS3095 (DDA) in a pin-compatible manner

Performance parameters

Product: THS3491IDDAR

Amplifier type: Current feedback

Number of circuits: 1

Output type: -

Pressure swing rate: 8000V/µs

Gain-bandwidth product: 900 MHz

Voltage - Input compensation: 1 mV

Current - Power supply: 16.8mA

Current - Output/Channel: 620 mA

Voltage - Span (minimum value) : 14 V

Voltage - Span (maximum value) : 32 V

Operating temperature: -40°C to 85°C (TA)

Installation type: Surface mount type

Package/Housing: 8-PowerSOIC

Act now and contact Mingjia Da (www.hkmjd.com) for an exclusive quote for the THS3491IDDAR.