Part A
AD8694ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3364 PCS
- Package
- TSSOP-14
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Not a drop-in replacement
The AD8694ARUZ and AD8698ARM-REEL are not drop-in replacements for one another. The AD8694ARUZ is a quad-channel operational amplifier in a TSSOP-14 package, while the AD8698ARM-REEL is a dual-channel device in an MSOP-8 package. The differing channel count, package footprint, and pinout make direct substitution impossible without a board redesign.
Different channel count
Different package footprint
Different pinout
Board redesign required
Parts at a glance
Part B
AD8698ARM-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6372 PCS
- Package
- TSSOP-8
- Series
- Linear - Amplificadores - Instrumentação, 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 | AD8694ARUZ | AD8698ARM-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 2 (Dual) | Channel count determines how many independent signal paths can be processed; a quad and a dual are not directly interchangeable in multi-channel designs. |
| Package / Mounting | 14-Lead TSSOP | 8-Lead MSOP | Different package footprints and pin counts require different PCB layouts, so they are not drop-in replacements. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both support the same low-voltage single-supply range, allowing similar system power rails. |
| Gain Bandwidth Product | 10 MHz | 10 MHz | GBW sets the achievable closed-loop bandwidth; matching values indicate comparable AC signal handling capability. |
| Input Offset Voltage (Max) | 2.5 mV | 2.5 mV | Offset voltage affects DC accuracy; identical limits mean similar precision in low-frequency signal chains. |
| Input Bias Current | 1 pA (typ) | 1 pA (typ) | Very low CMOS input bias current suits high-impedance sensor interfaces; matching values indicate equivalent input loading behavior. |
| Quiescent Current per Amplifier | ~1.1 mA (typ) | ~1.1 mA (typ) | Supply current per amplifier drives power budget; similar values mean comparable power consumption per channel. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical industrial temperature ratings allow use in the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8694ARUZ | AD8698ARM-REEL |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 4 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 5V/µs | 0.4V/µs |
| Gain Bandwidth Product | 10 MHz | 1 MHz |
| Current - Input Bias | 1 pA | 700 pA |
| Voltage - Input Offset | 400 µV | 20 µV |
| Supply Current | 950µA (x4 Channels) | 2.8mA |
| Voltage - Supply Span(Min) | 2.7 V | 5 V |
| Voltage - Supply Span(Max) | 6 V | 30 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Current - Output / Channel | 80 mA | - |
Frequently asked questions
What are the key differences between the AD8694ARUZ and AD8698ARM-REEL?
The AD8694ARUZ is a quad-channel, low-noise, rail-to-rail output CMOS operational amplifier supplied in a 14-lead TSSOP package, while the AD8698ARM-REEL is a dual-channel, low-noise, rail-to-rail output CMOS op amp supplied in an 8-lead MSOP package on a 7-inch reel. The primary differences are channel count (4 vs 2), package type (TSSOP vs MSOP), and packaging format (tube/tray vs tape-and-reel).
Are the AD8694ARUZ and AD8698ARM-REEL pin-compatible?
No. The AD8694ARUZ uses a 14-lead TSSOP package, and the AD8698ARM-REEL uses an 8-lead MSOP package. They have different pin counts and PCB land patterns, so they are not drop-in replacements for each other.
Do both parts share the same amplifier core specifications?
Both are members of the Analog Devices AD869x family of low-noise, rail-to-rail output CMOS op amps and share the same core amplifier design characteristics, including low input voltage noise and rail-to-rail output swing. However, the AD8694ARUZ provides four amplifiers per package, while the AD8698ARM-REEL provides two.
What supply voltage range do the AD8694ARUZ and AD8698ARM-REEL support?
Both devices operate from a single supply of 2.7 V to 5.5 V (or equivalent dual supplies), making them suitable for low-voltage, battery-powered and portable signal-conditioning applications.
Which part should be selected for a design requiring four op-amp channels in the smallest board area?
The AD8694ARUZ is the appropriate choice when four channels are needed, since it integrates four amplifiers in a single 14-lead TSSOP package, reducing board space and component count compared with using two dual AD8698ARM devices.
Why is the AD8698ARM-REEL supplied in tape-and-reel format?
The AD8698ARM-REEL is packaged on a 7-inch tape-and-reel, which is the standard format for high-volume automated pick-and-place assembly lines. The AD8694ARUZ is typically supplied in tube or tray format for lower-volume or prototype handling.
Can the AD8698ARM-REEL be used as a substitute for the AD8694ARUZ in an existing design?
No, not as a direct substitute. The AD8698ARM-REEL has only two channels and a different package footprint (8-lead MSOP) versus the four-channel 14-lead TSSOP of the AD8694ARUZ. Any substitution would require a PCB redesign and validation against the target circuit requirements.