XR2009ISO8X Equivalent & Substitute Parts

Part Overview

The XR2009ISO8X is a general-purpose operational amplifier manufactured by MaxLinear, Inc., featuring dual circuits in an 8-SOIC surface-mount package. This device delivers rail-to-rail output capability with a 20 MHz gain-bandwidth product and 27 V/µs slew rate, designed for low-power analog signal processing applications across industrial and consumer electronics.

The XR2009ISO8X is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for legacy systems and new designs requiring compatible performance characteristics.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	27	V/µs
Gain Bandwidth Product	20	MHz
-3dB Bandwidth	18	MHz
Current - Input Bias	370	nA
Voltage - Input Offset	800	µV
Current - Supply (x2 Channels)	185	µA
Current - Output / Channel	8.5	mA
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the XR2009ISO8X is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Dual-channel configuration (2 circuits)
General-purpose or CMOS amplifier topology
Rail-to-rail output capability
8-SOIC surface-mount package (0.154", 3.90mm width)
Operating temperature range: -40°C to 125°C minimum
Supply voltage span compatibility: 2.5 V to 5.5 V minimum overlap

Secondary Compatibility Parameters:

Slew rate ≥ 27 V/µs (preferred) or ≥ 5 V/µs (acceptable for lower-speed applications)
Gain-bandwidth product ≥ 10 MHz (acceptable) or ≥ 20 MHz (preferred)
Input bias current ≤ 370 nA (preferred) or ≤ 1 pA (acceptable for CMOS variants)
Input offset voltage ≤ 800 µV (preferred) or ≤ 600 µV (acceptable)
Output current per channel ≥ 8.5 mA (minimum requirement)

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications with different packaging) and Manufacturer-Recommended Alternatives (active-status parts with comparable or enhanced performance characteristics).

Parameter Comparison

Part Number	Manufacturer	Product Status	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (nA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Span (V)	Temp Range (°C)	Package
XR2009ISO8X	MaxLinear	Obsolete	General Purpose	27	20	370	800	185	8.5	2.5–5.5	-40 to 125	8-SOIC
XR2009ISO8MTR	MaxLinear	Obsolete	General Purpose	27	20	370	800	185	8.5	2.5–5.5	-40 to 125	8-SOIC
AD8606ARZ	Analog Devices	Active	CMOS	5	10	0.001	80	1	80	2.7–5.5	-40 to 125	8-SOIC
AD8616ARZ-REEL7	Analog Devices	Active	CMOS	12	24	0.0002	23	1.7	150	2.7–5	-40 to 125	8-SOIC
AD8646ARZ-REEL	Analog Devices	Active	General Purpose	11	24	0.0003	600	1.5	120	2.7–5.5	-40 to 125	8-SOIC
AD8646WARZ-RL	Analog Devices	Active	General Purpose	11	24	0.0003	600	1.5	120	2.7–5.5	-40 to 125	8-SOIC
ADA4084-2ARZ-RL	Analog Devices	Active	General Purpose	4.6	15.9	140	30	625	30	3–30	-40 to 125	8-SOIC
LMV722M/NOPB	National Semiconductor	Active	General Purpose	5.25	10	260	80	2.01	52.6	2.2–5.5	-40 to 85	8-SOIC
LTC6241CS8#PBF	Analog Devices	Active	CMOS	10	18	0.0005	100	2.5	30	2.8–6	0 to 70	8-SOIC
MAX4128ESA+	Analog Devices/Maxim	Active	General Purpose	10	25	50	250	725	50	2.7–6.5	-40 to 85	8-SOIC
MAX4132ESA+T	Analog Devices/Maxim	Active	General Purpose	4	10	50	250	1	50	2.7–6.5	-40 to 85	8-SOIC

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

The XR2009ISO8MTR is a parametric equivalent of the XR2009ISO8X, offering identical electrical specifications and operating characteristics. Both parts are obsolete; however, XR2009ISO8MTR maintains higher inventory availability (1101 pcs vs. 17300 pcs for the original). This part is suitable for direct substitution in legacy designs without circuit modification.

Active-Status Alternatives for New Designs:

For new product development or long-term supply assurance, the following active-status parts are recommended based on product lifecycle status and compliance certifications:

AD8646ARZ-REEL and AD8646WARZ-RL (Analog Devices, Active):

General-purpose amplifier topology matching the XR2009ISO8X functional class
RoHS3 and REACH compliant
Enhanced gain-bandwidth product (24 MHz vs. 20 MHz)
Reduced input offset voltage (600 µV vs. 800 µV)
Reduced input bias current (0.3 pA vs. 370 nA)
Full temperature range support (-40°C to 125°C)
Adequate output current per channel (120 mA vs. 8.5 mA minimum)
Inventory availability: 1900 pcs (ARZ-REEL), 1121 pcs (WARZ-RL)

MAX4128ESA+ (Analog Devices/Maxim Integrated, Active):

General-purpose amplifier with superior gain-bandwidth product (25 MHz)
RoHS3 and REACH compliant
Excellent input bias current performance (50 nA)
Reduced input offset voltage (250 µV)
Higher output current capability (50 mA per channel)
Extended supply voltage range (2.7 V to 6.5 V)
Inventory availability: 12700 pcs
Operating temperature: -40°C to 85°C (note: reduced upper limit vs. XR2009ISO8X)

ADA4084-2ARZ-RL (Analog Devices, Active):

General-purpose amplifier with extended supply voltage range (3 V to 30 V)
RoHS3 and REACH compliant
Superior input offset voltage (30 µV)
Reduced input bias current (140 nA)
Higher output current capability (30 mA per channel)
Full temperature range support (-40°C to 125°C)
Inventory availability: 50100 pcs (highest stock level)
Note: Minimum supply voltage (3 V) exceeds XR2009ISO8X minimum (2.5 V)

LMV722M/NOPB (National Semiconductor, Active):

General-purpose amplifier with automotive-grade qualification (AEC-Q100)
Reduced input bias current (260 nA, comparable to XR2009ISO8X)
Reduced input offset voltage (80 µV)
Extended supply voltage range (2.2 V to 5.5 V)
Inventory availability: 6962 pcs
Operating temperature: -40°C to 85°C (reduced upper limit)
Suitable for automotive and industrial applications

CMOS Alternatives (Lower Power Consumption):

AD8616ARZ-REEL7 (Analog Devices, Active):

CMOS amplifier topology with ultra-low input bias current (0.2 pA)
Enhanced gain-bandwidth product (24 MHz)
Reduced input offset voltage (23 µV)
Higher output current capability (150 mA per channel)
RoHS3 and REACH compliant
Full temperature range support (-40°C to 125°C)
Inventory availability: 19227 pcs (highest stock level among all substitutes)
Note: Maximum supply voltage (5 V) is lower than XR2009ISO8X (5.5 V)

AD8606ARZ (Analog Devices, Active):

CMOS amplifier with ultra-low input bias current (1 pA)
Reduced input offset voltage (80 µV)
Significantly lower supply current (1 µA vs. 185 µA)
Higher output current capability (80 mA per channel)
RoHS3 and REACH compliant
Full temperature range support (-40°C to 125°C)
Inventory availability: 1935 pcs
Suitable for battery-powered and low-power applications

Selection Criteria Summary:

Direct replacement (obsolete parts): XR2009ISO8MTR
Best overall active substitute: AD8646ARZ-REEL or AD8646WARZ-RL (general-purpose, full temperature range, RoHS3/REACH compliant)
Highest inventory availability: AD8616ARZ-REEL7 (CMOS, 19227 pcs) or ADA4084-2ARZ-RL (50100 pcs)
Automotive-qualified option: LMV722M/NOPB (AEC-Q100)
Extended supply voltage range: ADA4084-2ARZ-RL (3 V to 30 V)
Lowest power consumption: AD8606ARZ (1 µA supply current)

All recommended substitutes maintain 8-SOIC surface-mount packaging, dual-channel configuration, and rail-to-rail output capability. Pin-to-pin compatibility is preserved across all listed alternatives.

Frequently Asked Questions (FAQ)

Q1: Can I use AD8616ARZ-REEL7 as a direct replacement for XR2009ISO8X?

A: AD8616ARZ-REEL7 is functionally compatible but not pin-for-pin identical in all electrical characteristics. Both devices feature dual-channel, rail-to-rail output in 8-SOIC packaging. However, AD8616ARZ-REEL7 is a CMOS amplifier (vs. general-purpose for XR2009ISO8X), with significantly lower input bias current (0.2 pA vs. 370 nA) and higher slew rate (12 V/µs vs. 27 V/µs). The maximum supply voltage is 5 V (vs. 5.5 V for XR2009ISO8X). Circuit validation is required to confirm compatibility with your specific application.

Q2: What is the difference between XR2009ISO8X and XR2009ISO8MTR?

A: These parts are parametric equivalents with identical electrical specifications and operating characteristics. The primary difference is packaging format: XR2009ISO8X is supplied in standard packaging, while XR2009ISO8MTR is supplied in Cut Tape (CT) and Digi-Reel® format. Both are obsolete products. XR2009ISO8MTR has lower current inventory (1101 pcs vs. 17300 pcs).

Q3: Why should I consider AD8646ARZ-REEL over MAX4128ESA+ for new designs?

A: Both are active-status general-purpose amplifiers in 8-SOIC packaging. AD8646ARZ-REEL offers full temperature range support (-40°C to 125°C), matching the XR2009ISO8X specification. MAX4128ESA+ has a reduced upper operating temperature limit (-40°C to 85°C), which may not be suitable for industrial or automotive applications requiring extended temperature operation. AD8646ARZ-REEL also provides superior input offset voltage (600 µV vs. 250 µV) and lower input bias current (0.3 pA vs. 50 nA). MAX4128ESA+ offers higher output current capability (50 mA vs. 120 mA per channel) and extended supply voltage range (2.7 V to 6.5 V).

Q4: Is LTC6241CS8#PBF suitable for applications requiring -40°C to 125°C operation?

A: No. LTC6241CS8#PBF has an operating temperature range of 0°C to 70°C, which does not meet the XR2009ISO8X specification of -40°C to 125°C. This part is suitable only for commercial-grade applications with restricted temperature requirements. For extended temperature range applications, select AD8646ARZ-REEL, AD8616ARZ-REEL7, or ADA4084-2ARZ-RL.

Q5: What is the advantage of CMOS amplifiers (AD8606ARZ, AD8616ARZ-REEL7) over general-purpose alternatives?

A: CMOS amplifiers offer ultra-low input bias current (0.2–1 pA vs. 50–370 nA for general-purpose types), making them ideal for high-impedance signal sources and precision measurement applications. CMOS variants also provide lower supply current consumption, beneficial for battery-powered systems. However, CMOS amplifiers typically exhibit higher input offset voltage and lower slew rates compared to general-purpose designs. Select CMOS variants when input bias current minimization is critical; select general-purpose variants when slew rate and output current are primary requirements.

Q6: Can I use ADA4084-2ARZ-RL in a 2.5 V supply application?

A: No. ADA4084-2ARZ-RL has a minimum supply voltage of 3 V, which exceeds the XR2009ISO8X minimum of 2.5 V. This part is not suitable for applications requiring operation below 3 V. For 2.5 V minimum supply voltage compatibility, use AD8646ARZ-REEL, AD8616ARZ-REEL7, AD8606ARZ, MAX4128ESA+, or LMV722M/NOPB.

Q7: What does "RoHS3 Compliant" and "REACH Unaffected" mean for component selection?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the part contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers above specified thresholds. REACH Unaffected status indicates the part does not contain substances of very high concern (SVHC) listed under the European REACH regulation. These certifications are mandatory for products sold in the European Union and increasingly required for global supply chains. All recommended active-status substitutes (AD8606ARZ, AD8616ARZ-REEL7, AD8646ARZ-REEL, AD8646WARZ-RL, ADA4084-2ARZ-RL, MAX4128ESA+, MAX4132ESA+T, LTC6241CS8#PBF) are RoHS3 compliant and REACH unaffected.

Q8: Which substitute offers the highest output current capability?

A: AD8616ARZ-REEL7 provides the highest output current per channel at 150 mA, followed by AD8646ARZ-REEL and AD8646WARZ-RL at 120 mA. The XR2009ISO8X specifies only 8.5 mA per channel. If your application requires high output current drive capability, AD8616ARZ-REEL7 is the optimal choice.

Q9: Are all substitute parts available in 8-SOIC packaging?

A: Yes. All listed substitute parts are supplied in 8-SOIC (0.154", 3.90mm width) surface-mount packaging, ensuring mechanical and footprint compatibility with XR2009ISO8X PCB designs. Packaging format variations (Tube, Cut Tape & Digi-Reel®, Tape & Reel) do not affect the component package itself, only the delivery and handling format.

Q10: What inventory levels should I consider for supply chain planning?

A: Current inventory levels are: ADA4084-2ARZ-RL (50100 pcs), AD8616ARZ-REEL7 (19227 pcs), MAX4128ESA+ (12700 pcs), MAX4132ESA+T (12900 pcs), XR2009ISO8X (17300 pcs), LMV722M/NOPB (6962 pcs), AD8646ARZ-REEL (1900 pcs), LTC6241CS8#PBF (1250 pcs), AD8646WARZ-RL (1121 pcs), XR2009ISO8MTR (1101 pcs), AD8606ARZ (1935 pcs). For long-term supply assurance in new designs, prioritize parts with inventory exceeding 10000 units or active-status products from established manufacturers with continuous production.

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