Part A
AD8604ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6315 PCS
- Package
- SOIC-14
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8604ARZ and AD8602AR are both quad and dual precision CMOS rail-to-rail operational amplifiers from the same Analog Devices AD860x family, sharing identical per-channel electrical characteristics, supply range, and SOIC package family. The AD8604ARZ is a functional replacement candidate for the AD8602AR in applications where the additional two channels and the wider 14-lead SOIC footprint are acceptable; designers must validate board layout, channel count requirements, and thermal considerations before substitution.
Channel Count
High match
Package Type
High match
Supply Voltage Range
Validation required
Input Offset Voltage
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8604ARZ | AD8602AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Determines how many independent op-amp channels are available in one package; a quad cannot be directly substituted where a dual is required without redesigning the circuit layout. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Defines the operating supply window; matching ranges ensure the part works in the same single-supply or battery-powered system. |
| Gain Bandwidth Product | 8.4 MHz | 8.4 MHz | Sets the achievable closed-loop bandwidth; identical GBW means AC signal performance and stability are preserved across the substitution. |
| Input Offset Voltage (max) | 750 µV | 750 µV | Affects DC accuracy; equal offset specs mean precision and error budget remain unchanged when swapping parts. |
| Input Bias Current (typ) | 0.2 pA | 0.2 pA | Ultra-low CMOS input bias current is critical for high-impedance sensor and photodiode front-ends; matching values preserve input loading behavior. |
| Supply Current per Amplifier (typ) | 1.2 mA | 1.2 mA | Determines power consumption; identical per-amplifier current keeps the power budget consistent for portable and low-power designs. |
| Input Voltage Noise Density | 8 nV/√Hz | 8 nV/√Hz | Governs noise floor in signal chains; equal noise density ensures SNR and low-level signal resolution are unaffected. |
| Package Type | 14-Lead SOIC | 8-Lead SOIC | Footprint and pin count differ, so the PCB layout and pinout must be redesigned; the parts are not drop-in compatible. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Confirms both parts are rated for the same environmental conditions, supporting use in industrial and automotive-grade applications. |
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 | AD8602AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | DigiTrim® | DigiTrim® |
| Part Status | Active | Obsolete |
| 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 are the key differences between the AD8604ARZ and the AD8602AR?
The AD8604ARZ is a quad (four-channel) operational amplifier in a 14-lead SOIC package, while the AD8602AR is a dual (two-channel) op amp in an 8-lead SOIC package. Both are single-supply, rail-to-rail input/output CMOS amplifiers from Analog Devices with similar per-channel performance, but they differ in channel count and package pin count.
Are the AD8604ARZ and AD8602AR pin-compatible?
No. The AD8604ARZ uses a 14-lead SOIC (R-14) package and the AD8602AR uses an 8-lead SOIC (R-8) package. They have different pin counts and pinouts, so they are not drop-in replacements for one another on the same PCB footprint.
Do the AD8604ARZ and AD8602AR share the same supply voltage range?
Yes. Both devices are specified for single-supply operation from 2.7 V to 5.5 V, and both support dual-supply operation within the corresponding total supply range, per Analog Devices datasheets.
How do the bandwidth and slew rate compare between the AD8604ARZ and AD8602AR?
Both parts share the same per-channel AC specifications: a typical gain bandwidth product of 8 MHz and a typical slew rate of 5 V/µs, as listed in the Analog Devices datasheets for the AD8602/AD8604 family.
What is the difference in quiescent current between the AD8604ARZ and AD8602AR?
Because the AD8604ARZ contains four amplifiers and the AD8602AR contains two, the quad device draws roughly twice the total supply current of the dual. Per-channel quiescent current is similar for both, but the total quiescent current scales with the number of channels; consult the respective datasheets for the specified maximum values.
Can the AD8602AR be used where a design calls for the AD8604ARZ?
Not directly. The AD8602AR provides only two channels versus four on the AD8604ARZ and uses a different package and pinout. A substitution would require a redesign of the PCB layout and confirmation that two channels are sufficient for the application.
Are the AD8604ARZ and AD8602AR specified over the same temperature range?
Both are specified for the industrial temperature range of −40 °C to +125 °C, per the Analog Devices datasheets for the AD8602/AD8604 family.