1 Features

? Bandwidth:

– 900 MHz (VO = 2 VPP, AV = 5 V/V)

– 320 MHz (VO = 10 VPP, AV = 5 V/V)

? Slew rate: 8000 V/μs (VO = 20 VPP)

? Input voltage noise: 1.7 nV/√ Hz

? Bipolar supply range: ±7 V to ±16 V

? Single-supply range: 14 V to 32 V

? Output swing: 28 VPP (±16-V supplies, 100-Ω load)

? Linear output current: ±420 mA (typical)

? 16.8-mA trimmed supply current (low temperature

coefficient)

? HD2 and HD3: less than –75 dBc (50 MHz, VO =

10 VPP, 100-Ω load)

? Rise and fall time: 1.3 ns (10-V step)

? Overshoot: 1.5 (10-V step, AV = 5 V/V)

? Current limit and thermal shutdown protection

? Power down feature

2 Applications

? High-voltage, arbitrary waveform generators

? Pattern generators for LCD testers

? Output drivers for LCR meters

? Power FET drivers

? High capacitive load piezo element drivers

? VDSL line drivers

? Pin-compatible upgrade to THS3095 (DDA)

3 Description

The THS3491 current feedback amplifier (CFA)

provides a new level of performance for applications

requiring the lowest distortion at high output power

levels from DC through values greater than 100 MHz

at 100-Ω loads. Although specified at a gain of 5

V/V, this current feedback design holds near constant

bandwidth and distortion over a wide range of gains.

The 8000 V/μs of slew rate delivers an output of 10

VPP into demanding loads with low distortion through

100 MHz. The 900-MHz, small-signal bandwidth

delivers a low overshoot of less than 1.5 for a 10-

V step, and rise and fall times of less than 1.3 ns.

Peak output current drive values greater than 500

mA enable driving heavy capacitive loads with fast

signals.

New designs benefit from the lowest distortion using

the VQFN-16 (RGT) package, whereas the 8-pin

HSOIC (DDA) package (with PowerPAD?) upgrades

existing THS3091 or THS3095 designs. Lower output

headroom for the THS3491 provides more output

swing on the same ±15-V supplies versus legacy

THS3091 or THS3095 options.

THS3491屬于開發(fā)板，套件，編程器 > 評估板 - 運算放大器。美國德州儀器公司制造生產(chǎn)的THS3491評估板 - 運算放大器運算放大器評估板是裝有元器件的電路，用于提供特定集成電路或器件的工作實例。該產(chǎn)品族中的電路板提供了運算放大器實例。每個 IC 的通道類型有單通道、雙通道、三通道、四通道和八通道，放大器類型包括音頻、自動歸零、緩沖器、斬波器、電流反饋、電流檢測、差動、差分、四通道、儀表、隔離、J-FET、限幅、對數(shù)、功率、可編程增益、采樣保持、跨阻、可變增益、視頻、電壓反饋和零漂移。