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THS3470
  • THS3470
  • THS3470
  • THS3470

THS3470

ACTIVE

60V, 100MHz, 1A output current high-speed power amplifier

Texas Instruments THS3470 Product Info

1 April 2026 4

Parameters

Architecture

Current FB

Number of channels

1

Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)

12

Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)

60

GBW (typ) (MHz)

100

BW at Acl (MHz)

160

Acl, min spec gain (V/V)

1

Slew rate (typ) (V/µs)

5000

Vn at flatband (typ) (nV√Hz)

1.7

Vn at 1 kHz (typ) (nV√Hz)

3.15

Iq per channel (typ) (mA)

33

Vos (offset voltage at 25°C) (max) (mV)

1.1

Rail-to-rail

No

Features

Adj Current Limit, Error Flag, Shutdown

Rating

Catalog

Operating temperature range (°C)

-40 to 125

CMRR (typ) (dB)

72

Input bias current (max) (pA)

18000000

Offset drift (typ) (µV/°C)

2

Iout (typ) (mA)

1000

2nd harmonic (dBc)

90

3rd harmonic (dBc)

79

Frequency of harmonic distortion measurement (MHz)

10

Package

VQFN (REB)-42-49 mm² 7 x 7

Features

  • Bandwidth (VS = ±20V, RFB = 1.2kΩ):

    • Small-signal: 70MHz (VO = 2VPP)
    • Large-signal: 45MHz (VO = 20VPP)
    • Large-signal: 22MHz (VS = ±30V, VO = 50VPP, RF = 2kΩ)

  • Slew rate (20-80%):

    • 3000V/µs (RF = 1.2kΩ, CL = 300pF)
    • 2000V/µs (RF = 2kΩ, CL = 1nF)
    • 6500V/µs (Peak, RF = 1.2kΩ, RL = 100Ω)

  • Output current:

    • Linear output current: ±1.35A
    • Peak output current: 2A
    • 250mV VOUT swing in linear range (IOUT = ±1A, VO = ±25V, VS = ±30V)

  • Diagnostic features:

    • Programmable current limit (200mA to 1.5A, separate source and sink)
    • Die temperature and current output monitoring
    • Diagnostic flags (temperature, current source, current sink)

  • Bandwidth (VS = ±20V, RFB = 1.2kΩ):

    • Small-signal: 70MHz (VO = 2VPP)
    • Large-signal: 45MHz (VO = 20VPP)
    • Large-signal: 22MHz (VS = ±30V, VO = 50VPP, RF = 2kΩ)

  • Slew rate (20-80%):

    • 3000V/µs (RF = 1.2kΩ, CL = 300pF)
    • 2000V/µs (RF = 2kΩ, CL = 1nF)
    • 6500V/µs (Peak, RF = 1.2kΩ, RL = 100Ω)

  • Output current:

    • Linear output current: ±1.35A
    • Peak output current: 2A
    • 250mV VOUT swing in linear range (IOUT = ±1A, VO = ±25V, VS = ±30V)

  • Diagnostic features:

    • Programmable current limit (200mA to 1.5A, separate source and sink)
    • Die temperature and current output monitoring
    • Diagnostic flags (temperature, current source, current sink)

Description

The THS3470 is a high-speed current-feedback amplifier (CFA) with a high linear-output current drive (1.35A), high slew rate (6500V/µs peak), and wide supply range (60V). The device is stable over a wide range of capacitive loads and supports up to 2A of peak output current that these applications require. The THS3470 has a bandwidth of 70MHz with low-noise and distortion providing great large-signal performance for heavy resistive loads as well.

In addition to high speed and power performance, the THS3470 features a number of useful features such as temperature monitoring, output current monitoring, output current limiting, and output current protection. The output current features of the device can be manually enabled or driven by various flag outputs from the device providing even greater modularity in the use case of the device.

The THS3470 is available in a VQFN-42 (REB) package, providing small-size with an exposed top-side thermal pad for direct heat transfer to a heat sink. The THS3470 is characterized for operation over the wide temperature range of –40°C to +125°C.

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