Part A
AD8675ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5946 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8675ARZ and AD8674AR are both precision, low-noise operational amplifiers from the same Analog Devices family, sharing identical supply voltage ranges, similar gain bandwidth, and comparable noise performance. However, they differ in channel count and package configuration, so the AD8675ARZ is a strong functional candidate only where a single amplifier channel in an SOIC-8 footprint is acceptable; designers must verify channel count, board layout, and thermal considerations before substituting.
Channel Count
Validation required
Package Type
High match
Supply Voltage Range
High match
Input Noise Density
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8675ARZ | AD8674AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 4 | Determines how many independent op-amp channels are available in a single package; a single vs quad device is not a drop-in substitute for multi-channel designs. |
| Package / Mounting Type | 8-Lead SOIC (surface mount) | 14-Lead SOIC (surface mount) | Footprint and pin count must match the PCB layout; different package sizes require board redesign. |
| Input Offset Voltage (max) | 75 µV | 75 µV | Low offset voltage is critical for precision DC signal accuracy; matching values indicate comparable precision performance. |
| Input Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | Low noise density is essential for low-level signal amplification; identical values mean similar noise performance. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | Sets the achievable closed-loop bandwidth and speed; matching GBW supports similar dynamic response. |
| Slew Rate | 2.5 V/µs | 2.5 V/µs | Determines large-signal transient response and full-power bandwidth; identical slew rates indicate comparable behavior. |
| Supply Voltage Range | ±5 V to ±15 V (10 V to 30 V) | ±5 V to ±15 V (10 V to 30 V) | Defines compatible power rails; matching ranges allow use in the same supply environment. |
| Input Bias Current | 1 nA (typ) | 1 nA (typ) | Low bias current minimizes errors in high-impedance circuits; matching values indicate similar input characteristics. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Confirms suitability for industrial/extended temperature environments; identical ranges support the same applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8675ARZ | AD8674AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 1 | 4 |
| Slew Rate | 2.5V/µs | 4V/µs |
| Gain Bandwidth Product | 10 MHz | 10 MHz |
| Current - Input Bias | 500 pA | 3 nA |
| Voltage - Input Offset | 10 µV | 20 µV |
| Supply Current | 2.5mA | 3mA (x4 Channels) |
| Current - Output / Channel | 35 mA | 20 mA |
| Voltage - Supply Span(Min) | 10 V | 10 V |
| Voltage - Supply Span(Max) | 36 V | 36 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Output Type | Rail-to-Rail | - |
Frequently asked questions
What are the key differences between the AD8675ARZ and AD8674AR?
The AD8675ARZ is a single precision operational amplifier in an 8-lead SOIC package, while the AD8674AR is a quad precision operational amplifier in a 14-lead SOIC package. Both share the same core amplifier design with low noise, low offset voltage, and low input bias current, but differ in channel count and package footprint.
Are the AD8675ARZ and AD8674AR electrically identical per channel?
Yes, both parts are based on the same precision op-amp core. Per-channel specifications such as input offset voltage (typically 10 µV, 75 µV max), input bias current (typically 1 nA), and voltage noise density (typically 2.8 nV/√Hz at 1 kHz) are comparable, though the datasheets should be consulted for exact guaranteed limits per grade.
Can the AD8675ARZ be used as a drop-in replacement for one channel of the AD8674AR?
Functionally, a single AD8675ARZ channel can replace one channel of the AD8674AR, but it is not a pin-for-pin or package-level drop-in replacement. The AD8675ARZ is an 8-lead single device, whereas the AD8674AR is a 14-lead quad device; PCB layout, pinout, and package footprint must be redesigned accordingly.
What are the supply voltage and quiescent current characteristics of these amplifiers?
Both the AD8675ARZ and AD8674AR operate from dual supplies of ±5 V to ±15 V (or single supply 10 V to 30 V). The AD8675ARZ typically draws about 2.5 mA per amplifier, while the AD8674AR draws approximately 2.5 mA per amplifier as well, resulting in roughly 10 mA total quiescent current for the quad device.
Which package types are available for the AD8675ARZ and AD8674AR?
The AD8675ARZ is offered in an 8-lead SOIC (R-8) package. The AD8674AR is offered in a 14-lead SOIC (R-14) package. Both are RoHS-compliant surface-mount packages suitable for automated assembly.
Do the AD8675ARZ and AD8674AR share the same temperature range and offset voltage grade?
Both devices are specified over the industrial temperature range of −40°C to +125°C. The AD8675ARZ and AD8674AR are both available in the A-grade, which guarantees a maximum input offset voltage of 75 µV, making them suitable for precision signal conditioning applications.
What applications are these precision op-amps typically used for?
Both the AD8675ARZ and AD8674AR are suited for precision instrumentation, medical instrumentation, sensor signal conditioning, active filters, and low-noise audio or data acquisition front ends. The single AD8675ARZ is preferred where board space is limited, while the quad AD8674AR is used where multiple matched channels are needed in one package.