ISL28117FUBZ Equivalent & Substitute Parts

Part Overview

The ISL28117FUBZ is a general-purpose operational amplifier manufactured by Renesas Electronics Corporation, housed in an 8-MSOP surface-mount package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The ISL28117FUBZ delivers single-circuit amplification with specified electrical characteristics suitable for general-purpose applications across industrial and commercial temperature ranges.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	ISL28117FUBZ	—
Manufacturer	Renesas Electronics Corporation	—
Category	Linear, Amplifiers	—
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	—
Mounting Type	Surface Mount	—
Slew Rate	0.5	V/µs
Gain Bandwidth Product	1.5	MHz
Current - Input Bias	80	pA
Voltage - Input Offset	10	µV
Current - Supply	440	µA
Current - Output / Channel	43	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	40	V
Operating Temperature	-40 to 125	°C
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	3 (168 Hours)	—

Substitute Part Grouping Explanation

Substitute parts for the ISL28117FUBZ are identified based on electrical and mechanical compatibility within the following criteria:

Primary Substitution Parameters:

Package / Case: 8-TSSOP or 8-MSOP form factor (0.118", 3.00mm Width)
Mounting Type: Surface Mount
Operating Temperature Range: -40°C to 125°C
Number of Circuits: 1 (single amplifier)
Voltage Supply Span: Minimum 4.5 V to Maximum 40 V
RoHS3 Compliance

Electrical Performance Considerations: Substitute parts maintain compatibility when slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current specifications fall within acceptable operational ranges for the intended application circuit.

The substitute parts are organized into two functional categories:

Direct General-Purpose Replacements (OP1177ARMZ variants): Single-circuit general-purpose amplifiers with identical package geometry and operating temperature range, manufactured by Analog Devices Inc.
Enhanced Performance Alternative (OPA827AIDGKT, OPA827AIDGKR): J-FET amplifier with superior slew rate and gain bandwidth product, manufactured by Texas Instruments, suitable for applications requiring higher-speed performance.
Dual-Circuit Variant (ISL28217FUZ): Renesas Electronics dual-circuit amplifier with identical electrical specifications per channel, available as an active product alternative.

Parameter Comparison

Parameter	ISL28117FUBZ	ISL28217FUZ	OP1177ARMZ	OP1177ARMZ-R7	OP1177ARMZ-REEL	OPA827AIDGKT	OPA827AIDGKR
Manufacturer	Renesas	Renesas	Analog Devices	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	J-FET	J-FET
Number of Circuits	1	2	1	1	1	1	1
Package / Case	8-MSOP	8-MSOP	8-MSOP	8-MSOP	8-MSOP	8-VSSOP	8-VSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate (V/µs)	0.5	0.5	0.7	0.7	0.7	28	28
Gain Bandwidth Product (MHz)	1.5	1.5	1.3	1.3	1.3	22	22
Current - Input Bias (pA)	80	80	500	500	500	15	15
Voltage - Input Offset (µV)	10	4	15	15	15	75	75
Current - Supply (µA)	440	440 (x2)	400	400	400	4800	4800
Current - Output / Channel (mA)	43	43	10	10	10	30	30
Voltage - Supply Span Min (V)	4.5	4.5	5	5	5	8	8
Voltage - Supply Span Max (V)	40	40	36	36	36	36	36
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

The ISL28217FUZ represents the primary active substitute from Renesas Electronics. This dual-circuit variant maintains identical per-channel electrical specifications (slew rate 0.5 V/µs, gain bandwidth product 1.5 MHz, input bias current 80 pA) and supply voltage range (4.5 V to 40 V). The ISL28217FUZ is classified as an active product with improved moisture sensitivity rating (MSL 2 versus MSL 3), providing superior long-term reliability. Selection of this part is appropriate when dual-amplifier functionality can be accommodated within the circuit design.

For Single-Circuit General-Purpose Replacement:

The OP1177ARMZ, OP1177ARMZ-R7, and OP1177ARMZ-REEL variants from Analog Devices Inc. provide single-circuit general-purpose amplification with active product status. These parts maintain the 8-MSOP package geometry and -40°C to 125°C operating temperature range. The OP1177 series exhibits slightly reduced slew rate (0.7 V/µs versus 0.5 V/µs) and gain bandwidth product (1.3 MHz versus 1.5 MHz), with higher input bias current (500 pA versus 80 pA). Supply voltage range is constrained to 5 V minimum (versus 4.5 V for ISL28117FUBZ). All OP1177 variants carry MSL 1 rating (unlimited moisture sensitivity), indicating superior handling characteristics. The three variants differ only in packaging format: OP1177ARMZ (tube), OP1177ARMZ-R7 (cut tape and Digi-Reel), and OP1177ARMZ-REEL (cut tape and Digi-Reel).

For Enhanced Performance Applications:

The OPA827AIDGKT and OPA827AIDGKR from Texas Instruments represent J-FET amplifier alternatives with substantially higher performance specifications. These parts deliver slew rate of 28 V/µs (56× improvement) and gain bandwidth product of 22 MHz (14.7× improvement), with significantly lower input bias current (15 pA versus 80 pA). Output current capability is 30 mA per channel. The OPA827 series requires minimum supply voltage of 8 V (versus 4.5 V for ISL28117FUBZ), limiting applicability to higher-voltage systems. Both variants maintain the 8-VSSOP package footprint and -40°C to 125°C operating temperature. Selection is appropriate for applications requiring high-speed signal processing or low-noise performance.

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original ISL28117FUBZ.

Frequently Asked Questions (FAQ)

Q: Can the ISL28217FUZ directly replace the ISL28117FUBZ in a single-amplifier circuit?

A: The ISL28217FUZ is a dual-circuit amplifier housed in the same 8-MSOP package. Direct substitution is possible by utilizing only one of the two amplifier circuits and leaving the second circuit unused or configured as a buffer. Per-channel electrical specifications are identical to the ISL28117FUBZ. The unused amplifier circuit must be properly biased to prevent oscillation or excessive current draw.

Q: What are the key differences between the OP1177ARMZ variants?

A: The OP1177ARMZ, OP1177ARMZ-R7, and OP1177ARMZ-REEL are electrically identical. Differences exist only in packaging and delivery format: OP1177ARMZ is supplied in tube packaging, while OP1177ARMZ-R7 and OP1177ARMZ-REEL are supplied in cut tape and Digi-Reel format. Selection depends on assembly line requirements and component handling procedures.

Q: Is the OPA827AIDGKT suitable for low-voltage applications below 8 V?

A: No. The OPA827AIDGKT requires a minimum supply voltage of 8 V, whereas the ISL28117FUBZ operates at supply voltages as low as 4.5 V. Applications requiring operation below 8 V must use the ISL28217FUZ or OP1177 series alternatives.

Q: How do input bias current specifications affect circuit design?

A: The ISL28117FUBZ exhibits input bias current of 80 pA, while the OP1177 series exhibits 500 pA. The OPA827 series exhibits 15 pA. Higher input bias current increases voltage offset errors in high-impedance input circuits. Applications with input impedances exceeding 1 MΩ should prioritize parts with lower input bias current specifications.

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

A: MSL rating indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before requiring baking. ISL28117FUBZ carries MSL 3 (168 hours), ISL28217FUZ carries MSL 2 (1 year), and OP1177 variants carry MSL 1 (unlimited). Higher MSL ratings provide greater manufacturing flexibility and reduced risk of moisture-induced failures during assembly.

Q: Can the OPA827 series be used in applications designed for the ISL28117FUBZ?

A: The OPA827 series is electrically compatible with the ISL28117FUBZ in applications where the minimum supply voltage requirement of 8 V is satisfied. The substantially higher slew rate and gain bandwidth product may introduce different frequency response characteristics and stability margins. Circuit simulation or prototype testing is necessary to confirm performance equivalence in specific applications.

Q: What packaging considerations apply to substitute part selection?

A: All substitute parts maintain the 8-MSOP or 8-VSSOP surface-mount package footprint compatible with the ISL28117FUBZ PCB layout. The OPA827 series uses 8-VSSOP packaging, which is mechanically compatible with 8-MSOP footprints. No PCB redesign is required for package substitution.

Q: Why is the ISL28117FUBZ classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and support. The ISL28217FUZ, OP1177 series, and OPA827 series represent active alternatives with ongoing manufacturing support and availability.

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