CS3012-ISZ Equivalent & Substitute Parts Reference

Part Overview

The CS3012-ISZ 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, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The CS3012-ISZ operates across a 2.7 V to 6.7 V supply range with rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications.

Due to its obsolete status, alternative components must be evaluated based on electrical compatibility, package equivalence, and functional performance parameters.

Key Parameters

Parameter	CS3012-ISZ Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	2	V/µs
Current - Input Bias	50	pA
Voltage - Input Offset	10	µV
Current - Supply	1.7	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	6.7	V
Operating Temperature Range	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the CS3012-ISZ requires evaluation across three primary criteria:

1. Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface-mount package to ensure direct PCB compatibility without layout modifications.

2. Circuit Count and Output Configuration: The CS3012-ISZ contains 2 circuits with rail-to-rail output. Substitute parts must maintain dual-circuit architecture with rail-to-rail output capability to preserve functional equivalence.

3. Electrical Operating Range: The supply voltage span (2.7 V to 6.7 V) and operating temperature range (-40°C to 85°C) define the application envelope. Substitute parts must support at minimum the specified supply range and temperature range of the target application.

Substitute parts are grouped into two categories:

Category A - Direct Functional Equivalents (Dual-Circuit CMOS Amplifiers): TLC4502AID, TLC4502AIDR, TLC4502ACD, TLC4502ACDR, TLC4502ID, TLC4502IDR, TLC4502CD, TLC4502CDR, TLC4502AMD

These parts maintain the dual-circuit architecture and rail-to-rail output configuration. All are manufactured by Texas Instruments and feature CMOS amplifier topology with identical slew rate (2.5 V/µs) and input offset voltage (10 µV).

Category B - Alternative Topology Substitutes (Single-Circuit Zero-Drift Amplifiers): AD8555ARZ-REEL7, OPA333AIDR

These parts represent alternative topologies with single-circuit configuration. Substitution requires circuit redesign to accommodate single-channel operation and may require dual-package implementation for dual-channel applications.

Parameter Comparison

Parameter	CS3012-ISZ	TLC4502AID	TLC4502AIDR	TLC4502ACD	TLC4502ACDR	TLC4502ID	TLC4502IDR	TLC4502CD	TLC4502CDR	TLC4502AMD	AD8555ARZ-REEL7	OPA333AIDR
Amplifier Type	General Purpose	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	Zero-Drift	Zero-Drift
Number of Circuits	2	2	2	2	2	2	2	2	2	2	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	—	Rail-to-Rail
Slew Rate (V/µs)	2	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	1.2	0.16
Current - Input Bias (pA)	50	1	1	1	1	1	1	1	1	1	16000	70
Voltage - Input Offset (µV)	10	10	10	10	10	10	10	10	10	10	2	2
Current - Supply (mA)	1.7	2.5 (x2)	2.5 (x2)	2.5 (x2)	2.5 (x2)	2.5 (x2)	2.5 (x2)	2.5 (x2)	2.5 (x2)	2.5 (x2)	2	0.017
Voltage - Supply Span Min (V)	2.7	4	4	4	4	4	4	4	4	4	2.7	1.8
Voltage - Supply Span Max (V)	6.7	6	6	6	6	6	6	6	6	6	5.5	5.5
Operating Temperature Min (°C)	-40	-40	-40	0	0	-40	-40	0	0	-55	-40	-40
Operating Temperature Max (°C)	85	125	125	70	70	125	125	70	70	125	125	125
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Last Time Buy	Active	Last Time Buy	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Category A - Direct Functional Equivalents):

The TLC4502 series from Texas Instruments represents the most direct functional replacement for the CS3012-ISZ. All variants maintain dual-circuit architecture, rail-to-rail output, and 8-SOIC packaging. Selection among TLC4502 variants depends on application requirements:

TLC4502AID / TLC4502AIDR: Recommended for applications requiring extended temperature range (-40°C to 125°C). Both variants support the full industrial temperature specification. TLC4502AIDR is supplied in Tape & Reel packaging; TLC4502AID is supplied in Tube packaging. Both are Active status products with high inventory availability (5,000,200 and 5,680 units respectively).

TLC4502ID / TLC4502IDR: Functionally identical to TLC4502AID/AIDR variants with equivalent temperature range (-40°C to 125°C) and Active product status. Inventory availability is comparable (5,000,100 units).

TLC4502ACD / TLC4502ACDR: Suitable for commercial-temperature applications (0°C to 70°C). TLC4502ACDR is Active status with 8,140 units in stock. TLC4502ACD is Active status with 928 units in stock.

TLC4502CD / TLC4502CDR: Commercial-temperature variants (0°C to 70°C) with Last Time Buy status. TLC4502CDR is Active status with 6,394 units available.

TLC4502AMD: Extended military-temperature range (-55°C to 125°C) with Last Time Buy status. Suitable for applications requiring the widest temperature specification. 957 units in stock.

Supply Voltage Consideration: All TLC4502 variants operate within 4 V to 6 V supply range. Applications requiring operation below 4 V (down to 2.7 V as specified for CS3012-ISZ) cannot use TLC4502 substitutes without circuit redesign.

Secondary Substitutes (Category B - Alternative Topologies):

AD8555ARZ-REEL7 (Analog Devices): Single-circuit zero-drift amplifier. Supports 2.7 V to 5.5 V supply range, matching the lower supply limit of CS3012-ISZ. Active product status with 1,686 units in stock. Substitution requires dual-package implementation for dual-channel applications. Lower slew rate (1.2 V/µs) and reduced input bias current (16 nA) may benefit precision applications but require circuit redesign.

OPA333AIDR (Texas Instruments): Single-circuit zero-drift amplifier with extended supply range (1.8 V to 5.5 V) and lowest supply current (17 µA). Active product status with 3,322 units in stock. Lowest slew rate (0.16 V/µs) and lowest supply current make this suitable for ultra-low-power applications. Substitution requires dual-package implementation for dual-channel applications.

Compliance and Regulatory Status:

All recommended TLC4502 variants are ROHS3 compliant with REACH Unaffected status. AD8555ARZ-REEL7 and OPA333AIDR are ROHS3 compliant with REACH Unaffected status. All parts carry EAR99 ECCN classification and HTSUS code 8542.33.0001.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace CS3012-ISZ with any TLC4502 variant without PCB modifications?

A: Yes, all TLC4502 variants use identical 8-SOIC (0.154", 3.90mm Width) packaging and pinout compatibility. However, supply voltage range differs. TLC4502 series operates 4 V to 6 V; CS3012-ISZ operates 2.7 V to 6.7 V. If your application uses supply voltages below 4 V, TLC4502 substitutes are not compatible without circuit redesign.

Q2: What is the difference between TLC4502AID and TLC4502AIDR?

A: Both variants are electrically identical. The difference is packaging format: TLC4502AID is supplied in Tube packaging; TLC4502AIDR is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements. Both support -40°C to 125°C operating temperature.

Q3: Why do some TLC4502 variants have different temperature ranges?

A: Temperature range is determined by manufacturing process and testing specifications. TLC4502AID/AIDR/ID/IDR support -40°C to 125°C (industrial/extended). TLC4502ACD/ACDR/CD/CDR support 0°C to 70°C (commercial). TLC4502AMD supports -55°C to 125°C (military). Select the variant matching your application temperature requirements.

Q4: Can I use AD8555ARZ-REEL7 or OPA333AIDR as direct replacements?

A: No. Both are single-circuit amplifiers; CS3012-ISZ contains two circuits. Direct replacement requires using two packages in parallel or redesigning the circuit for single-channel operation. These alternatives are suitable only for applications where dual-channel functionality can be restructured.

Q5: What is the significance of "Last Time Buy" product status?

A: Last Time Buy indicates the manufacturer has announced end-of-life for that part number. Existing inventory will be sold, but no future production is planned. Parts with Last Time Buy status (TLC4502AMD, TLC4502CD) should be used only if inventory is sufficient for the product lifetime, or transition to Active status alternatives should be planned.

Q6: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended TLC4502 variants, AD8555ARZ-REEL7, and OPA333AIDR are ROHS3 compliant. All carry REACH Unaffected status, confirming compliance with current environmental regulations.

Q7: Which substitute offers the lowest power consumption?

A: OPA333AIDR offers the lowest supply current at 17 µA (compared to CS3012-ISZ at 1.7 mA and TLC4502 variants at 2.5 mA per channel). However, this is a single-circuit device requiring circuit redesign for dual-channel applications.

Q8: What is the inventory status for immediate availability?

A: TLC4502AID (5,000,200 units), TLC4502ID (5,000,100 units), and TLC4502ACDR (8,140 units) offer the highest inventory levels for immediate procurement. All are Active status products.

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