CS3004-FSZR Equivalent & Substitute Parts

Part Overview

The CS3004-FSZR is a general purpose operational amplifier manufactured by Cirrus Logic Inc., featuring dual circuits in an 8-SOIC surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The CS3004-FSZR operates across a 2.7V to 5V supply range with rail-to-rail output capability, suitable for low-power analog signal conditioning applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	CS3004-FSZR
Manufacturer	Cirrus Logic Inc.
Category	Linear, Amplifiers
Amplifier Type	General Purpose
Number of Circuits	2
Output Type	Rail-to-Rail
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Voltage - Supply Span (Min)	2.7 V
Voltage - Supply Span (Max)	5 V
Operating Temperature	-40°C ~ 125°C
Product Status	Obsolete
Slew Rate	0.25V/µs
Current - Input Bias	170 pA
Voltage - Input Offset	2 µV
Current - Supply	2mA

Substitute Part Grouping Explanation

Substitution of the CS3004-FSZR is determined by the following critical parameters that must be maintained or improved:

Mandatory Compatibility Parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width) — pinout and footprint compatibility
Number of Circuits: 2 — dual amplifier configuration
Output Type: Rail-to-Rail — output swing capability
Voltage - Supply Span: 2.7V to 5V minimum — operating voltage range
Operating Temperature: -40°C ~ 125°C — thermal operating range
Mounting Type: Surface Mount — assembly compatibility

Performance Parameters (Substitutes may exceed specifications):

Slew Rate: 0.25V/µs or higher
Current - Input Bias: 170 pA or lower
Voltage - Input Offset: 2 µV or lower
Current - Supply: 2mA or lower

All substitute parts listed maintain the mandatory compatibility parameters while offering equal or superior performance characteristics. Substitutes are grouped by amplifier technology type: Zero-Drift (Analog Devices) and CMOS (Texas Instruments).

Parameter Comparison

Parameter	CS3004-FSZR	AD8629ARZ	AD8629WARZ-RL	OPA2314AQDRQ1	OPA2316ID	OPA2316IDR
Manufacturer	Cirrus Logic Inc.	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	Zero-Drift	Zero-Drift	CMOS	CMOS	CMOS
Number of Circuits	2	2	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Voltage - Supply Span (Min)	2.7 V	2.7 V	2.7 V	1.8 V	1.8 V	1.8 V
Voltage - Supply Span (Max)	5 V	5 V	5 V	5.5 V	5.5 V	5.5 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Slew Rate	0.25V/µs	1V/µs	1V/µs	1.5V/µs	6V/µs	6V/µs
Current - Input Bias	170 pA	30 pA	30 pA	2 pA	5 pA	5 pA
Voltage - Input Offset	2 µV	1 µV	1 µV	500 µV	500 µV	500 µV
Current - Supply	2mA	Not Specified	Not Specified	150µA (x2 Channels)	400µA (x2 Channels)	400µA (x2 Channels)
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Analog Devices AD8629ARZ and AD8629WARZ-RL:

Both AD8629 variants are zero-drift amplifiers with active status and full long-term availability. These devices offer superior input offset voltage (1 µV vs. 2 µV) and significantly lower input bias current (30 pA vs. 170 pA). The AD8629WARZ-RL is supplied in Tape & Reel packaging with higher inventory (32,545 pcs) compared to AD8629ARZ in Tube packaging (6,100 pcs). Both variants are ROHS3 compliant with MSL 1 rating (unlimited moisture sensitivity duration). These substitutes are suitable for applications requiring low offset voltage and low bias current performance.

Texas Instruments OPA2314AQDRQ1:

The OPA2314AQDRQ1 is an automotive-grade CMOS amplifier qualified to AEC-Q100 standard. This device features the lowest input bias current (2 pA) among all substitutes and operates across an extended supply range (1.8V to 5.5V). Current supply per channel is 150µA, representing significant power reduction compared to the CS3004-FSZR. The automotive qualification makes this part suitable for automotive and industrial applications requiring enhanced reliability. Inventory availability is 35,200 pcs.

Texas Instruments OPA2316ID and OPA2316IDR:

Both OPA2316 variants are CMOS amplifiers with identical electrical specifications. The OPA2316ID is supplied in Tube packaging (2,304 pcs inventory), while OPA2316IDR is supplied in Cut Tape & Digi-Reel packaging (20,695 pcs inventory). These devices feature the highest slew rate (6V/µs) and gain bandwidth product (10 MHz) among all substitutes, making them suitable for higher-speed signal conditioning applications. Both are ROHS3 compliant with MSL 2 rating. The extended supply range (1.8V to 5.5V) provides additional design flexibility.

Selection Criteria:

For low-offset, low-bias-current applications: Select AD8629ARZ or AD8629WARZ-RL
For automotive applications: Select OPA2314AQDRQ1
For higher-speed applications: Select OPA2316ID or OPA2316IDR
For maximum inventory availability: Select AD8629WARZ-RL or OPA2316IDR

Frequently Asked Questions (FAQ)

Q: Can I directly replace CS3004-FSZR with any of these substitute parts without PCB modification?

A: Yes. All substitute parts maintain the identical 8-SOIC package footprint (0.154", 3.90mm width) and pinout configuration. No PCB layout changes are required. However, verify that your circuit design can accommodate the different electrical characteristics, particularly slew rate and input bias current specifications.

Q: What is the primary reason the CS3004-FSZR is obsolete?

A: The CS3004-FSZR is classified as obsolete by Cirrus Logic Inc. Substitute parts from active manufacturers (Analog Devices and Texas Instruments) provide equivalent or superior performance with guaranteed long-term availability and support.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are either ROHS3 compliant (AD8629 series and OPA2316 series) or meet REACH compliance requirements. The OPA2314AQDRQ1 automotive-grade part has vendor-undefined MSL rating but maintains full compliance with automotive standards.

Q: What is the difference between AD8629ARZ and AD8629WARZ-RL?

A: Both devices are electrically identical zero-drift amplifiers. The primary difference is packaging: AD8629ARZ is supplied in Tube packaging, while AD8629WARZ-RL is supplied in Tape & Reel (TR) format. AD8629WARZ-RL has significantly higher inventory availability (32,545 pcs vs. 6,100 pcs) and MSL 1 rating (unlimited duration) compared to AD8629ARZ with MSL 2 rating (1 year).

Q: Which substitute offers the lowest power consumption?

A: The OPA2314AQDRQ1 offers the lowest supply current at 150µA per dual-channel configuration, compared to 2mA for the CS3004-FSZR. This represents a 93% reduction in supply current, making it ideal for battery-powered or power-constrained applications.

Q: Can I use OPA2316 parts in applications requiring very low input offset voltage?

A: The OPA2316 series has input offset voltage of 500 µV, which is 250 times higher than the CS3004-FSZR (2 µV). For precision applications requiring low offset voltage, the AD8629 zero-drift amplifiers (1 µV offset) are more appropriate.

Q: Are there any temperature range limitations with these substitutes?

A: No. All substitute parts maintain the identical operating temperature range of -40°C to 125°C as the CS3004-FSZR, ensuring thermal compatibility across industrial and extended-temperature applications.

Q: Which substitute has the fastest slew rate?

A: The OPA2316ID and OPA2316IDR both feature a slew rate of 6V/µs, which is 24 times faster than the CS3004-FSZR (0.25V/µs). These devices are suitable for applications requiring rapid signal transitions and higher bandwidth performance.

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