Part A
AD8604ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6315 PCS
- Package
- SOIC-14
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8604ARZ is a viable functional replacement candidate for the AD8602ARZ in many designs, sharing the same amplifier family, supply voltage range, and package footprint, though the higher channel count and correspondingly different quiescent current and package thermal characteristics require validation against the target application's power budget and board layout.
Channel Count
High match
Package Type
High match
Supply Current
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD8602ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6579 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8602ARZ | AD8604ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 4 (Quad) | Determines how many independent op-amp channels are available in a single package, directly affecting circuit density and channel count. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating supply window; identical ranges mean both parts are compatible with the same single-supply systems. |
| Input Offset Voltage (Max) | 500 µV | 500 µV | Low offset voltage improves DC accuracy; matching values indicate equivalent precision performance. |
| Gain Bandwidth Product | 8.4 MHz | 8.4 MHz | Sets the frequency range over which the amplifier provides useful gain; identical GBW means similar AC performance. |
| Input Bias Current (Typ) | 0.2 pA | 0.2 pA | Very low CMOS input bias current suits high-impedance sensor interfaces; matching values confirm equivalent input characteristics. |
| Supply Current per Amplifier (Typ) | 750 µA | 750 µA | Indicates power consumption per channel; equal values mean comparable efficiency in battery-powered designs. |
| Rail-to-Rail Input/Output | Yes | Yes | Rail-to-rail capability maximizes dynamic range in low-voltage supplies; both parts share this feature. |
| Package Type | 8-Lead SOIC | 14-Lead SOIC | Footprint and pin count differ, so PCB layout and board space must be redesigned when substituting between the two. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Confirms both parts are rated for the same industrial/extended temperature environments. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8604ARZ | AD8602ARZ |
|---|---|---|
| Series | DigiTrim® | DigiTrim® |
| Part Status | Active | Active |
| Amplifier Type | CMOS | CMOS |
| Number of Circuits | 4 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 6V/µs | 6V/µs |
| Gain Bandwidth Product | 8.4 MHz | 8.4 MHz |
| Current - Input Bias | 0.2 pA | 0.2 pA |
| Voltage - Input Offset | 80 µV | 80 µV |
| Supply Current | 750µA (x4 Channels) | 750µA (x2 Channels) |
| Current - Output / Channel | 50 mA | 50 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5.5 V | 5.5 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the primary difference between the AD8602ARZ and AD8604ARZ?
The AD8602ARZ is a dual (2-channel) operational amplifier, while the AD8604ARZ is a quad (4-channel) operational amplifier. Both are members of the Analog Devices AD860x family of precision, low-noise, CMOS rail-to-rail input/output op amps and share the same core amplifier design and electrical performance per channel, differing primarily in channel count and package pinout.
Are the AD8602ARZ and AD8604ARZ pin-compatible?
No. The AD8602ARZ is supplied in an 8-lead SOIC package, and the AD8604ARZ is supplied in a 14-lead SOIC package. Because they have different pin counts and pinouts, they are not drop-in replacements for one another on the same PCB footprint.
Do the AD8602ARZ and AD8604ARZ share the same supply voltage range?
Yes. Both devices operate from a single supply of 2.7 V to 5.5 V, or from a dual supply of ±1.35 V to ±2.75 V, as specified in the Analog Devices AD860x datasheet.
What are the key AC specifications common to both the AD8602ARZ and AD8604ARZ?
Per the Analog Devices datasheet, both parts offer a gain bandwidth product of 8 MHz, a slew rate of 5 V/µs, and a low input bias current typical of CMOS inputs (approximately 1 pA at room temperature). These specifications apply per amplifier channel.
How does the quiescent current compare between the AD8602ARZ and AD8604ARZ?
The AD8602ARZ (dual) typically draws approximately 750 µA per amplifier, while the AD8604ARZ (quad) draws a similar per-amplifier supply current. Total package quiescent current therefore scales with the number of channels, so the quad device consumes roughly twice the total supply current of the dual device under identical per-channel conditions.
Can the AD8604ARZ be used where an AD8602ARZ design needs additional channels?
Functionally the amplifiers are equivalent per channel, but the AD8604ARZ cannot be substituted on an existing AD8602ARZ footprint because of the different package and pinout. A new PCB layout accommodating the 14-lead SOIC package is required, and the design should be re-validated against the datasheet.
What are typical applications for the AD8602ARZ and AD8604ARZ?
Both devices are suited to precision signal conditioning, photodiode and sensor amplification, active filters, and portable instrumentation, where low offset voltage, low noise, and rail-to-rail input/output operation are required. The dual AD8602ARZ fits two-channel designs, while the quad AD8604ARZ suits multi-channel signal chains in a single package.