Part A
AD8634HRZN
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 1257 PCS
- Series
- Linear - Amplifiers - Instrumentation, Op Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8634HRZN and AD8630WARZ-RL are both zero-drift, rail-to-rail output operational amplifiers from Analog Devices, making them strong functional replacement candidates. However, they differ in channel count, package and pinout, and specified operating temperature range, so the substitution is viable only after validating the target board's footprint, channel requirements, and thermal environment.
Amplifier Architecture
High match
Channel Count
Not compatible
Package Type
Not compatible
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD8630WARZ-RL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3419 PCS
- Package
- SOIC-14
- 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 | AD8634HRZN | AD8630WARZ-RL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 4 | Channel count determines how many independent signal paths can be processed in one package, affecting board layout and channel density. |
| Input Offset Voltage (Max) | 5 µV | 5 µV | Low offset voltage is critical for precision DC signal conditioning and sensor interfaces where small errors accumulate. |
| Input Voltage Noise Density | 22 nV/√Hz | 22 nV/√Hz | Noise density sets the achievable signal-to-noise ratio in low-level AC applications such as audio and instrumentation. |
| Gain Bandwidth Product | 2.5 MHz | 2.5 MHz | GBW determines the maximum frequency at which the amplifier can provide useful closed-loop gain. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | The supply range must match the system rail to ensure proper operation and compatibility with surrounding circuitry. |
| Quiescent Current per Amplifier | 1.3 mA | 1.3 mA | Quiescent current directly impacts power budget in battery-powered and portable designs. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | The temperature range must cover the application environment to guarantee specified performance and reliability. |
| Package / Mounting Type | 8-Lead SOIC (Surface Mount) | 14-Lead SOIC (Surface Mount) | Package footprint and pin count affect PCB layout, thermal behavior, and whether a drop-in replacement is possible. |
| Input Bias Current (Typ) | 100 pA | 100 pA | Very low bias current is essential for high-impedance sensor and photodiode interfaces to minimize offset errors. |
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 | AD8634HRZN | AD8630WARZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Discontinued at DigiKey | Active |
| Amplifier Type | Standard (General Purpose) | Zero-Drift |
| Number of Circuits | 2 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 4.9V/µs | 1V/µs |
| Gain Bandwidth Product | 9.7 MHz | 2.5 MHz |
| -3 dB Bandwidth | 11 MHz | 2.5 MHz |
| Current - Input Bias | 45 nA | 30 pA |
| Voltage - Input Offset | 250 µV | 1 µV |
| Current - Output / Channel | 65 mA | 30 mA |
| Voltage - Supply Span(Min) | - | 2.7 V |
| Voltage - Supply Span(Max) | - | 5 V |
| Operating Temperature | -40°C ~ 175°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | AD8634 | - |
| Supply Current | 1.1mA (x2 Channels) | - |
| Voltage - Supply Span (Min) | 3 V | - |
| Voltage - Supply Span (Max) | 30 V | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the AD8634HRZN and AD8630WARZ-RL?
The AD8634HRZN is a dual, low-power, precision operational amplifier specified over the extended industrial temperature range of −40°C to +125°C and supplied in an 8-lead SOIC package (R-8). The AD8630WARZ-RL is a quad, zero-drift, low-noise operational amplifier specified over the automotive temperature range of −40°C to +125°C and supplied in a 14-lead SOIC package (RW-14) in tape-and-reel format. The primary differences are channel count (dual vs. quad), package pin count, and the automotive qualification of the AD8630WARZ-RL.
Are the AD8634HRZN and AD8630WARZ-RL pin-compatible?
No. The AD8634HRZN uses an 8-lead SOIC package, while the AD8630WARZ-RL uses a 14-lead SOIC package. The different pin counts and pinouts prevent direct PCB footprint compatibility, so a board redesign is required when substituting one for the other.
What is the channel count of each device?
The AD8634HRZN is a dual operational amplifier (two channels). The AD8630WARZ-RL is a quad operational amplifier (four channels). Designs requiring four amplifier channels should use the AD8630WARZ-RL, while two-channel designs can use the AD8634HRZN.
What are the operating temperature ranges for these amplifiers?
Both the AD8634HRZN and the AD8630WARZ-RL are specified over the −40°C to +125°C temperature range. The AD8630WARZ-RL carries an automotive qualification (W grade), making it suitable for automotive and other harsh-environment applications, while the AD8634HRZN is specified for extended industrial use.
What package and packaging options are available for each part?
The AD8634HRZN is supplied in an 8-lead SOIC package. The AD8630WARZ-RL is supplied in a 14-lead SOIC package in tape-and-reel format (the "-RL" suffix denotes reel packaging). Both are surface-mount SOIC devices, but their body widths and lead counts differ.
Can the AD8630WARZ-RL be used as a drop-in replacement for the AD8634HRZN?
No. Because the AD8630WARZ-RL is a quad device in a 14-lead package and the AD8634HRZN is a dual device in an 8-lead package, they are not drop-in replacements. A substitution requires verifying channel count, pinout, PCB layout, and application-specific electrical requirements against the respective manufacturer datasheets.
Which part should be selected for an automotive-qualified design?
The AD8630WARZ-RL is the appropriate choice for automotive-qualified designs, as its "W" grade designation indicates automotive qualification over the −40°C to +125°C range. The AD8634HRZN is specified for extended industrial applications and should be evaluated against the target system's qualification requirements before use in automotive designs.