Part A
AD8604ARUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3528 PCS
- Package
- TSSOP-14
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8608ARUZ and AD8604ARUZ are quad-channel CMOS operational amplifiers from the same Analog Devices family, sharing identical TSSOP-14 packaging, supply voltage range, and rail-to-rail input/output architecture. Both parts are functionally interchangeable in most signal-conditioning applications, with the AD8608 offering lower offset voltage and the AD8604 providing higher output current drive. Designers should validate application-specific requirements for offset accuracy and load drive before final substitution.
Package Type
High match
Channel Count
High match
Supply Voltage Range
High match
Input Offset Voltage
Validation required
Parts at a glance
Part B
AD8608ARUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3744 PCS
- Package
- TSSOP-14
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8608ARUZ | AD8604ARUZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 | 4 | Both are quad op-amps, so channel count is identical and does not affect substitutability. |
| Gain Bandwidth Product | 10 MHz | 8.4 MHz | Higher GBW allows wider signal bandwidth and faster settling; a lower-GBW part may limit high-frequency performance. |
| Slew Rate | 5 V/µs | 6 V/µs | Slew rate limits large-signal response speed; a slower part can distort fast transients. |
| Input Offset Voltage (max) | 65 µV | 750 µV | Lower offset improves DC accuracy; a much higher offset can introduce significant error in precision circuits. |
| Input Voltage Noise Density | 8 nV/√Hz | 33 nV/√Hz | Lower noise density benefits low-level signal amplification; higher noise degrades SNR in sensitive applications. |
| Supply Current per Amplifier (typ) | 1.2 mA | 1.2 mA | Quiescent current affects power budget; identical values mean no power-consumption difference. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Compatible supply range ensures both parts operate in the same system rails without redesign. |
| Input Bias Current (typ) | 0.2 pA | 0.2 pA | Very low CMOS input bias current suits high-impedance sensors; identical values mean equivalent input loading. |
| Package | 14-Lead TSSOP | 14-Lead TSSOP | Same package footprint allows drop-in board replacement without layout changes. |
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 | AD8604ARUZ | AD8608ARUZ |
|---|---|---|
| Series | DigiTrim® | DigiTrim® |
| Part Status | Active | Active |
| Amplifier Type | CMOS | CMOS |
| Number of Circuits | 4 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 6V/µs | 5V/µs |
| Gain Bandwidth Product | 8.4 MHz | 10 MHz |
| Current - Input Bias | 0.2 pA | 1 pA |
| Voltage - Input Offset | 80 µV | 80 µV |
| Supply Current | 750µA (x4 Channels) | 1mA (x4 Channels) |
| Current - Output / Channel | 50 mA | 80 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 AD8608ARUZ and AD8604ARUZ?
The AD8608ARUZ is a quad, low-noise, CMOS rail-to-rail input/output operational amplifier, while the AD8604ARUZ is a quad, low-power, rail-to-rail input/output operational amplifier. The AD8608 is optimized for lower voltage noise (typically 8 nV/√Hz at 1 kHz), whereas the AD8604 is optimized for lower supply current (typically 750 µA per amplifier). Both are quad amplifiers in 14-lead TSSOP packages.
Are the AD8608ARUZ and AD8604ARUZ pin-compatible?
Yes. Both devices are quad operational amplifiers offered in the same 14-lead TSSOP (RU-14) package with identical pin assignments, allowing them to share the same PCB footprint. However, pin compatibility does not guarantee electrical interchangeability in a given design.
What is the supply voltage range for the AD8608ARUZ and AD8604ARUZ?
Both the AD8608ARUZ and AD8604ARUZ operate from a single supply of 2.7 V to 5.5 V, or from dual supplies of ±1.35 V to ±2.75 V, as specified in the Analog Devices datasheets.
How do the noise specifications of the AD8608ARUZ and AD8604ARUZ compare?
The AD8608ARUZ features a low voltage noise density of typically 8 nV/√Hz at 1 kHz, making it suitable for low-noise signal conditioning. The AD8604ARUZ has a higher voltage noise density of typically 25 nV/√Hz at 1 kHz, reflecting its optimization for low-power rather than low-noise applications.
How do the supply current requirements of the AD8608ARUZ and AD8604ARUZ compare?
The AD8604ARUZ is optimized for low power consumption, drawing typically 750 µA per amplifier. The AD8608ARUZ draws typically 1.2 mA per amplifier. Designs with tight power budgets may favor the AD8604, while noise-sensitive designs may favor the AD8608.
What are the gain bandwidth and slew rate specifications for these amplifiers?
The AD8608ARUZ has a gain bandwidth product of 10 MHz and a slew rate of 5 V/µs. The AD8604ARUZ has a gain bandwidth product of 8 MHz and a slew rate of 5 V/µs. Both specifications are typical values per the Analog Devices datasheets.
Can the AD8608ARUZ and AD8604ARUZ be used interchangeably in an existing design?
They are not drop-in replacements without evaluation. Although they share package and pinout, differences in noise (8 nV/√Hz vs 25 nV/√Hz at 1 kHz), supply current (1.2 mA vs 750 µA per amplifier), and gain bandwidth (10 MHz vs 8 MHz) can affect circuit performance. Substitution should be validated against the specific application requirements and the manufacturer datasheets.
What are the input offset voltage specifications for the AD8608ARUZ and AD8604ARUZ?
The AD8608ARUZ specifies a maximum input offset voltage of 65 µV. The AD8604ARUZ specifies a maximum input offset voltage of 500 µV. Designs requiring tighter DC precision may favor the AD8608ARUZ.