THS3110CD Equivalent & Substitute Parts

Part Overview

The THS3110CD is a current feedback amplifier integrated circuit manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, indicating it is no longer in active production. The THS3110CD delivers a slew rate of 1300V/µs with a -3dB bandwidth of 100 MHz, making it suitable for high-speed signal conditioning applications. Due to its obsolete status, equivalent and substitute parts are necessary for design continuity and procurement of new inventory.

Key Parameters

Parameter	Value
Amplifier Type	Current Feedback
Number of Circuits	1
Slew Rate	1300V/µs
-3dB Bandwidth	100 MHz
Current - Input Bias	1.5 µA
Voltage - Input Offset	3 mV
Current - Supply	4.8 mA
Current - Output / Channel	260 mA
Voltage - Supply Span (Min)	10 V
Voltage - Supply Span (Max)	30 V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the THS3110CD is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Amplifier Type: Current Feedback architecture
Slew Rate: 1300V/µs
-3dB Bandwidth: 100 MHz
Supply voltage range compatibility
Package / Case: 8-SOIC form factor

Mechanical Compatibility Criteria:

Surface mount mounting type
8-SOIC package footprint (0.154", 3.90mm Width)

Substitute parts are grouped into two categories:

Direct Equivalent (Same Manufacturer): THS3110ID is a Texas Instruments part with identical electrical specifications and package configuration. The primary distinction is product status (Active vs. Obsolete) and operating temperature range extension.

Cross-Manufacturer Equivalents: LT1223CS8, LT1223CS8#PBF, and LT1223CS8#TRPBF are current feedback amplifiers from Linear Technology and Analog Devices Inc. with matching core electrical parameters (slew rate, bandwidth, circuit count) and identical package geometry. These parts differ in packaging format (Bulk, Tube, Tape & Reel) and certain secondary electrical specifications.

Parameter Comparison

Parameter	THS3110CD	THS3110ID	LT1223CS8	LT1223CS8#PBF	LT1223CS8#TRPBF
Manufacturer	Texas Instruments	Texas Instruments	Linear Technology	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	Current Feedback	Current Feedback	Current Feedback	Current Feedback	Current Feedback
Number of Circuits	1	1	1	1	1
Slew Rate	1300V/µs	1300V/µs	1300V/µs	1300V/µs	1300V/µs
-3dB Bandwidth	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz
Current - Input Bias	1.5 µA	1.5 µA	1 µA	1 µA	1 µA
Voltage - Input Offset	3 mV	3 mV	1 mV	1 mV	1 mV
Current - Supply	4.8 mA	4.8 mA	6 mA	6 mA	6 mA
Current - Output / Channel	260 mA	260 mA	60 mA	Not specified	60 mA
Voltage - Supply Span (Min)	10 V	10 V	8 V	8 V	8 V
Voltage - Supply Span (Max)	30 V	30 V	36 V	36 V	36 V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Affected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

THS3110ID is the primary substitute for the THS3110CD. Both parts are manufactured by Texas Instruments with identical electrical specifications and package configuration. The THS3110ID carries Active product status and an extended operating temperature range (-40°C ~ 85°C), providing superior availability and broader environmental performance. Both parts maintain ROHS3 compliance and REACH Unaffected status. The THS3110ID is available in Tube packaging format.

LT1223CS8#PBF and LT1223CS8#TRPBF are cross-manufacturer alternatives from Analog Devices Inc. These parts maintain the core electrical performance (1300V/µs slew rate, 100 MHz bandwidth) and identical package geometry. Both variants are ROHS3 compliant and REACH Unaffected. The LT1223CS8#PBF is supplied in Tube packaging, while LT1223CS8#TRPBF is supplied in Tape & Reel format. These parts exhibit improved input bias current (1 µA vs. 1.5 µA) and lower input offset voltage (1 mV vs. 3 mV), with expanded supply voltage range (8V to 36V). Output current per channel is reduced to 60 mA compared to the THS3110CD specification of 260 mA.

LT1223CS8 from Linear Technology is an Active product with matching electrical and package specifications. This part is RoHS non-compliant and REACH Affected, which may restrict its use in regulated applications. Selection of this variant should be limited to applications without RoHS or REACH compliance requirements.

For applications requiring strict compliance with environmental regulations and maximum availability, THS3110ID or LT1223CS8#PBF/LT1223CS8#TRPBF are the recommended selections.

Frequently Asked Questions (FAQ)

Q: Can THS3110ID be used as a direct replacement for THS3110CD?

A: Yes. The THS3110ID is a direct equivalent with identical electrical specifications (1300V/µs slew rate, 100 MHz bandwidth, 1.5 µA input bias current, 3 mV input offset voltage) and package configuration (8-SOIC surface mount). The primary difference is product status (Active vs. Obsolete) and extended operating temperature range. Pin-for-pin compatibility is maintained.

Q: What are the key differences between THS3110CD and the LT1223 series?

A: The LT1223 series (LT1223CS8, LT1223CS8#PBF, LT1223CS8#TRPBF) maintains identical slew rate (1300V/µs) and bandwidth (100 MHz) specifications. However, the LT1223 variants exhibit lower input bias current (1 µA vs. 1.5 µA), lower input offset voltage (1 mV vs. 3 mV), and reduced output current per channel (60 mA vs. 260 mA). Supply voltage range is expanded (8V to 36V vs. 10V to 30V). These differences may affect circuit performance in applications sensitive to input offset voltage or requiring high output current capability.

Q: What is the difference between LT1223CS8#PBF and LT1223CS8#TRPBF?

A: Both parts are electrically identical current feedback amplifiers from Analog Devices Inc. The primary distinction is packaging format. LT1223CS8#PBF is supplied in Tube packaging, while LT1223CS8#TRPBF is supplied in Tape & Reel (TR) format. Tape & Reel packaging is typically used for automated assembly processes, while Tube packaging is suitable for manual handling and lower-volume applications.

Q: Are all substitute parts RoHS compliant?

A: No. The LT1223CS8 from Linear Technology is RoHS non-compliant and REACH Affected. The THS3110ID, LT1223CS8#PBF, and LT1223CS8#TRPBF are all ROHS3 compliant and REACH Unaffected. For applications requiring environmental compliance certification, select from the ROHS3-compliant variants.

Q: Can I use LT1223CS8 in a new design?

A: The LT1223CS8 is electrically compatible with the THS3110CD and maintains the required package footprint. However, this part is RoHS non-compliant and REACH Affected. Use of this variant is restricted to applications without regulatory compliance requirements. For new designs, LT1223CS8#PBF or LT1223CS8#TRPBF are preferred alternatives.

Q: What is the impact of reduced output current in the LT1223 series?

A: The LT1223 series specifies 60 mA output current per channel compared to 260 mA for the THS3110CD. This reduction affects the maximum load current the amplifier can drive. Applications requiring high output current capability (above 60 mA) may require additional output buffering or alternative device selection.

Q: Are there temperature range considerations for substitution?

A: The THS3110ID supports an extended operating temperature range (-40°C ~ 85°C) compared to the THS3110CD (0°C ~ 70°C). The LT1223 series variants operate within the same temperature range as the original part (0°C ~ 70°C). For applications requiring operation below 0°C or above 70°C, the THS3110ID is the appropriate selection.

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