Part A
AD8544ARUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3601 PCS
- Package
- TSSOP-14
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8544ARUZ and AD8544ARU are functionally equivalent CMOS operational amplifiers sharing the same core die, package, and electrical characteristics; the only distinction is the RoHS-compliant Z suffix on the AD8544ARUZ, making it a suitable drop-in replacement for the non-Z variant in most applications.
Amplifier Type and Channel Count
High match
Package Type and Pinout
High match
Supply Voltage and Electrical Ratings
High match
RoHS Compliance
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 | AD8544ARUZ | AD8544ARU | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures consistent design, documentation, and quality processes. |
| Amplifier Type | CMOS, Rail-to-Rail | CMOS, Rail-to-Rail | Defines the input/output swing behavior and suitability for low-voltage single-supply designs. |
| Number of Channels | 4 | 4 | Channel count must match the circuit's signal path requirements for direct substitution. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Determines compatibility with the system power rail and operating headroom. |
| Gain Bandwidth Product | 1 MHz | 1 MHz | Sets the achievable closed-loop bandwidth and AC performance of the amplifier. |
| Input Offset Voltage (Max) | 6 mV | 6 mV | Affects DC accuracy and error budget in precision signal conditioning. |
| Input Bias Current | 1 pA (typ) | 1 pA (typ) | Low bias current is critical for high-impedance sensor and photodiode interfaces. |
| Package / Mounting | 14-TSSOP (Surface Mount) | 14-TSSOP (Surface Mount) | Package and footprint must match for board-level drop-in replacement. |
| Packaging / Ordering Suffix | Z (RoHS-compliant, tube/tray) | Non-Z (legacy, may be non-RoHS) | The Z suffix denotes lead-free/RoHS compliance; non-Z parts may not meet current environmental and assembly requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8544ARUZ | AD8544ARU |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 4 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.92V/µs | 0.92V/µs |
| Gain Bandwidth Product | 1 MHz | 1 MHz |
| Current - Input Bias | 4 pA | 4 pA |
| Voltage - Input Offset | 1 mV | 1 mV |
| Supply Current | 45µA (x4 Channels) | 45µA (x4 Channels) |
| Current - Output / Channel | 30 mA | 30 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 is the difference between AD8544ARUZ and AD8544ARU?
Both are quad rail-to-rail CMOS operational amplifiers from Analog Devices in a 14-lead TSSOP package. The AD8544ARUZ is the RoHS-compliant, lead-free (Pb-free) version, while the AD8544ARU is the older non-RoHS ordering code. Functionally and electrically they are the same device; the suffix difference reflects packaging/ordering compliance status.
Are AD8544ARUZ and AD8544ARU electrically identical?
Yes. Both ordering codes refer to the same AD8544 quad op amp die with identical specified parameters, including 1 MHz gain bandwidth, 0.92 V/µs slew rate, rail-to-rail input and output, and 2.7 V to 5.5 V single-supply operation. The difference is only in the RoHS/lead-free compliance and ordering designation.
Can AD8544ARUZ be used as a drop-in replacement for AD8544ARU?
Yes, in terms of electrical function and package footprint, since both are the same AD8544 device in a 14-lead TSSOP. The AD8544ARUZ is the RoHS-compliant replacement; designs requiring Pb-free/RoHS compliance should use the AD8544ARUZ ordering code.
What package do AD8544ARUZ and AD8544ARU use?
Both are supplied in a 14-lead TSSOP (Thin Shrink Small Outline Package), designated by the "RU" suffix in the ordering code. The "Z" suffix on AD8544ARUZ indicates RoHS-compliant, lead-free construction.
What are the key specifications of the AD8544?
The AD8544 is a quad rail-to-rail input/output CMOS op amp with 1 MHz gain bandwidth product, 0.92 V/µs slew rate, low input bias current (typically 1 pA), and operation from a 2.7 V to 5.5 V single supply. It is specified for low-power, single-supply applications.
Is the AD8544ARU still recommended for new designs?
Analog Devices designates the RoHS-compliant AD8544ARUZ as the current ordering code. The non-RoHS AD8544ARU is the legacy designation; new designs should use the AD8544ARUZ to meet current RoHS/lead-free requirements.
Do AD8544ARUZ and AD8544ARU differ in operating temperature range?
No. Both ordering codes refer to the same AD8544 device and share the same specified operating temperature range for the industrial-grade part. The suffix difference is RoHS/lead-free compliance, not temperature grade.