LT1884CS8#PBF Equivalent & Substitute Parts

Part Overview

The LT1884CS8#PBF is a general purpose operational amplifier manufactured by Analog Devices Inc., featuring dual circuits in an 8-SOIC surface mount package. This rail-to-rail output amplifier operates across a wide supply voltage range of 2.7 V to 36 V and is designed for applications requiring low input bias current and minimal input offset voltage. The device is active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when design requirements necessitate alternative performance characteristics, different packaging formats, or enhanced availability while maintaining functional compatibility within the 8-SOIC form factor and dual-circuit configuration.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	1	V/µs
Gain Bandwidth Product	2.2	MHz
Current - Input Bias	150	pA
Voltage - Input Offset	30	µV
Current - Supply (x2 Channels)	850	µA
Current - Output / Channel	50	mA
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the LT1884CS8#PBF are grouped based on the following substitution criteria:

Primary Compatibility Parameters:

Dual-circuit configuration (2 circuits per package)
8-SOIC surface mount package (0.154", 3.90mm width)
Rail-to-rail output capability
Operating temperature range compatibility (-40°C minimum)
Supply voltage range overlap (minimum 2.7 V to 3 V, maximum 36 V)
RoHS3 compliance and MSL rating

Substitution Categories:

Category 1: General Purpose Amplifiers with Matched Performance Parts maintaining general purpose amplifier classification with comparable slew rate and gain bandwidth product specifications within the same package footprint.

Category 2: J-FET Input Amplifiers Parts featuring J-FET input stages offering significantly lower input bias current (1.3 pA) compared to the LT1884CS8#PBF, suitable for applications requiring ultra-low bias current characteristics.

Category 3: Enhanced Bandwidth Amplifiers Parts with higher gain bandwidth product and slew rate specifications, applicable when increased frequency response is required.

Category 4: Low-Power General Purpose Amplifiers Parts with reduced supply current consumption while maintaining general purpose amplifier functionality and dual-circuit configuration.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package
LT1884CS8#PBF	Analog Devices	General Purpose	1	2.2	150	30	850	50	2.7	36	-40 to 85	8-SOIC
AD823AARZ	Analog Devices	J-FET	35	10	1.3	800	6300	17	3	36	-40 to 85	8-SOIC
AD823AARZ-R7	Analog Devices	J-FET	35	10	1.3	800	6300	17	3	36	-40 to 85	8-SOIC
AD823AARZ-RL	Analog Devices	J-FET	35	10	1.3	800	6300	17	3	36	-40 to 85	8-SOIC
OP284ESZ	Analog Devices	General Purpose	4	4.25	80000	100	—	10	3	36	-40 to 125	8-SOIC
OP284ESZ-REEL	Analog Devices	General Purpose	4	4.25	80000	100	—	10	3	36	-40 to 125	8-SOIC
OP284ESZ-REEL7	Analog Devices	General Purpose	4	4.25	80000	100	—	10	3	36	-40 to 125	8-SOIC
MAX9944ASA+	Analog Devices/Maxim	General Purpose	0.35	2.4	4	20	550	20	6	38	-40 to 125	8-SOIC
MAX9944ASA+T	Analog Devices/Maxim	General Purpose	0.35	2.4	4	20	550	20	6	38	-40 to 125	8-SOIC
OPA1662AIDRQ1	Texas Instruments	Audio	17	22	600	500	1500	50	3	36	-40 to 85	8-SOIC
OPA2171AID	Texas Instruments	General Purpose	1.5	3	8	250	475	35	2.7	36	-40 to 125	8-SOIC

Engineering Selection Recommendations

For Direct Functional Replacement:

The OPA2171AID from Texas Instruments provides the closest functional alignment to the LT1884CS8#PBF. Both devices maintain general purpose amplifier classification, dual-circuit configuration, and identical minimum supply voltage specification (2.7 V). The OPA2171AID extends the maximum operating temperature to 125°C and offers lower supply current consumption (475 µA versus 850 µA), making it suitable for applications where the extended temperature range and reduced power dissipation are beneficial.

For Low Input Bias Current Applications:

The AD823AARZ, AD823AARZ-R7, and AD823AARZ-RL variants offer J-FET input stages with input bias current of 1.3 pA, representing a 115-fold reduction compared to the LT1884CS8#PBF. These parts are applicable when ultra-low bias current is a design requirement. All three variants are electrically identical; selection depends on packaging format preference (Tube, Cut Tape & Digi-Reel®, or Cut Tape & Digi-Reel® with alternative reel configuration).

For Enhanced Bandwidth Applications:

The OPA1662AIDRQ1 provides significantly higher slew rate (17 V/µs) and gain bandwidth product (22 MHz) specifications. This part is qualified to AEC-Q100 automotive standards and carries MSL rating of 2 (1 Year). Selection of this part is appropriate when audio frequency response and higher slew rate performance are required.

For Low-Power Supply Operation:

The MAX9944ASA+ and MAX9944ASA+T variants offer the lowest supply current consumption (550 µA) among general purpose alternatives. These parts require a minimum supply voltage of 6 V, which restricts their use to applications where the 2.7 V minimum of the LT1884CS8#PBF is not required.

For Extended Temperature Range:

The OP284ESZ series (OP284ESZ, OP284ESZ-REEL, OP284ESZ-REEL7) extends the maximum operating temperature to 125°C. These parts are available in multiple packaging formats and offer higher gain bandwidth product (4.25 MHz) compared to the LT1884CS8#PBF.

All substitute parts listed maintain RoHS3 compliance and are active in production status.

Frequently Asked Questions (FAQ)

Q: Can the AD823AARZ series be used as a direct replacement for the LT1884CS8#PBF?

A: The AD823AARZ series is electrically compatible within the 8-SOIC package footprint and maintains the dual-circuit, rail-to-rail output configuration. However, the AD823AARZ features J-FET input stages with significantly different electrical characteristics: input bias current of 1.3 pA (versus 150 pA), input offset voltage of 800 µV (versus 30 µV), and higher slew rate of 35 V/µs (versus 1 V/µs). Selection depends on whether the application requires the ultra-low bias current characteristics of the J-FET input stage or the lower offset voltage of the LT1884CS8#PBF.

Q: What is the difference between AD823AARZ, AD823AARZ-R7, and AD823AARZ-RL?

A: These three part numbers are electrically identical. The differences are in packaging format: AD823AARZ is supplied in Tube packaging, while AD823AARZ-R7 and AD823AARZ-RL are supplied in Cut Tape (CT) & Digi-Reel® format with different reel configurations. Selection is based on procurement and assembly process requirements.

Q: Is the OPA2171AID suitable for applications requiring the 2.7 V minimum supply voltage of the LT1884CS8#PBF?

A: Yes. The OPA2171AID maintains the 2.7 V minimum supply voltage specification, making it compatible with applications requiring operation at this lower voltage threshold. The OPA2171AID additionally extends the maximum operating temperature to 125°C and reduces supply current consumption to 475 µA.

Q: Why does the MAX9944ASA+ have a higher minimum supply voltage requirement?

A: The MAX9944ASA+ and MAX9944ASA+T require a minimum supply voltage of 6 V, compared to 2.7 V for the LT1884CS8#PBF. This higher minimum voltage is a design characteristic of the MAX9944 architecture. These parts are suitable only for applications where the 6 V minimum supply voltage is available.

Q: Can the OPA1662AIDRQ1 be used in non-automotive applications?

A: Yes. The OPA1662AIDRQ1 is qualified to AEC-Q100 automotive standards, but this qualification does not restrict its use to automotive applications. The part is suitable for any application requiring the specified electrical characteristics. The automotive qualification indicates enhanced reliability and testing standards.

Q: What is the significance of the MSL (Moisture Sensitivity Level) rating difference between parts?

A: The LT1884CS8#PBF carries MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling. The OPA1662AIDRQ1 carries MSL 2 (1 Year), requiring that the part be used within one year of the moisture barrier bag opening. This affects procurement, storage, and assembly scheduling but does not impact electrical performance or functionality.

Q: Are all substitute parts available in the same 8-SOIC package footprint?

A: Yes. All substitute parts listed are available in the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical compatibility with existing PCB layouts designed for the LT1884CS8#PBF.

Q: Which substitute part offers the best overall performance improvement?

A: Performance improvement depends on application requirements. The OPA1662AIDRQ1 offers the highest slew rate (17 V/µs) and gain bandwidth product (22 MHz) for frequency-dependent applications. The AD823AARZ series offers the lowest input bias current (1.3 pA) for high-impedance signal sources. The OPA2171AID offers the best balance of low supply current, extended temperature range, and maintained minimum supply voltage specification.

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