THS4011IDRG4 Equivalent & Substitute Parts

Part Overview

The THS4011IDRG4 is a voltage feedback amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, necessitating identification of active alternative components for new designs and production continuity. The THS4011IDRG4 delivers a slew rate of 310V/µs with a gain bandwidth product of 290 MHz, designed for applications requiring high-speed voltage feedback amplification across a 9V to 32V supply range.

Substiute Parts

THS4011IDRG4

Texas InstrumentsIn Stock: 799THS4011IDRG4 Datasheet

Current PartRFQ

LM7121IM/NOPB

Texas InstrumentsIn Stock: 1174LM7121IM/NOPB Datasheet

MFR RecommendedRFQ

LM7121IMX/NOPB

Texas InstrumentsIn Stock: 2020LM7121IMX/NOPB Datasheet

MFR RecommendedRFQ

AD847JRZ-REEL7

Analog Devices Inc.In Stock: 1229AD847JRZ-REEL7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the THS4011IDRG4 is determined by the following critical parameters: package type (8-SOIC surface mount), amplifier topology (voltage feedback), number of circuits (single), and electrical performance envelope. The substitute parts are grouped based on compatibility with these core specifications.

Primary Substitution Criteria:

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Amplifier Type: Voltage Feedback
• Number of Circuits: 1
• Operating Temperature Range: -40°C to 85°C
• RoHS3 Compliance

The LM7121IM/NOPB and LM7121IMX/NOPB are direct functional equivalents from Texas Instruments, both active products with identical packaging and superior electrical performance characteristics. The AD847JRZ-REEL7 from Analog Devices Inc. provides an alternative from a different manufacturer with compatible package specifications, though with different amplifier classification and reduced bandwidth performance.

Parameter Comparison

Engineering Selection Recommendations

LM7121IM/NOPB and LM7121IMX/NOPB (Recommended Primary Substitutes)

Both LM7121 variants are active products from Texas Instruments with full ROHS3 compliance and identical operating temperature range (-40°C to 85°C). These devices provide superior electrical performance with slew rates of 1300V/µs compared to the THS4011IDRG4's 310V/µs. The LM7121IM/NOPB is supplied in Tube packaging with 1156 units in stock, while the LM7121IMX/NOPB is supplied in Cut Tape & Digi-Reel format with 2000 units in stock. Both support the full supply voltage range of 4.5V to 33V, exceeding the THS4011IDRG4's 9V to 32V specification. The 8-SOIC package dimensions are identical, enabling direct PCB layout compatibility.

AD847JRZ-REEL7 (Alternative Substitute)

The AD847JRZ-REEL7 from Analog Devices Inc. is an active product with ROHS3 compliance, supplied in Cut Tape & Digi-Reel format with 1190 units in stock. This device shares the 8-SOIC package and surface mount configuration. However, the operating temperature range is restricted to 0°C to 70°C, which does not cover the full -40°C to 85°C specification of the THS4011IDRG4. The AD847JRZ-REEL7 is classified as a general purpose amplifier rather than voltage feedback topology, with significantly reduced bandwidth (50 MHz gain bandwidth product) and lower output current capability (32 mA versus 110 mA). Selection of this device requires verification that application requirements fall within its narrower operating temperature and performance envelope.

Frequently Asked Questions (FAQ)

Q: Can the LM7121IM/NOPB directly replace the THS4011IDRG4 on existing PCBs?

A: Yes. Both devices use identical 8-SOIC packaging with 0.154" width and 3.90mm dimensions. Pin configuration and surface mount footprint are compatible, enabling direct PCB substitution without layout modifications.

Q: What is the difference between LM7121IM/NOPB and LM7121IMX/NOPB?

A: Both devices are electrically identical with identical electrical specifications. The primary difference is packaging format: LM7121IM/NOPB is supplied in Tube packaging, while LM7121IMX/NOPB is supplied in Cut Tape & Digi-Reel format. Selection depends on production volume and handling requirements.

Q: Why does the LM7121 have lower gain bandwidth product (175 MHz) than the THS4011IDRG4 (290 MHz)?

A: The LM7121 achieves superior slew rate performance (1300V/µs versus 310V/µs) through different circuit topology optimization. Applications requiring the specific 290 MHz bandwidth must be evaluated against the LM7121's 235 MHz -3dB bandwidth specification.

Q: Is the AD847JRZ-REEL7 suitable for all THS4011IDRG4 applications?

A: The AD847JRZ-REEL7 is not universally suitable. Its operating temperature range (0°C to 70°C) does not cover the full -40°C to 85°C specification of the THS4011IDRG4. Applications requiring extended temperature operation must use the LM7121 variants. Additionally, the AD847JRZ-REEL7 provides significantly reduced bandwidth and output current capability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The LM7121IM/NOPB, LM7121IMX/NOPB, and AD847JRZ-REEL7 are all ROHS3 compliant, matching the compliance status of the THS4011IDRG4.

Q: What supply voltage range should be used when substituting with LM7121 devices?

A: The LM7121 variants support 4.5V to 33V operation, which encompasses the THS4011IDRG4's 9V to 32V range. Existing designs operating within 9V to 32V require no supply voltage modifications.

Q: How do input bias current specifications compare?

A: The THS4011IDRG4 specifies 2 µA input bias current, while the LM7121 variants specify 5.2 µA. The AD847JRZ-REEL7 specifies 3.3 µA. Applications with strict input bias current requirements must account for these differences in circuit design.