Part A
AD603AR
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6107 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD603ARZ and AD603AR are functionally equivalent variable-gain amplifiers sharing the same core specifications, package, and pinout, with the ARZ suffix denoting RoHS-compliant lead-free construction versus the leaded AR version. Both parts are interchangeable in gain-control, bandwidth, and supply requirements, making the AD603ARZ a suitable drop-in replacement where RoHS compliance is required or preferred.
Package Type
High match
Pin Configuration
High match
Gain Bandwidth
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 | AD603ARZ | AD603AR | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures consistent design, documentation, and support for both parts. |
| Amplifier Type | Variable Gain Amplifier (VGA) | Variable Gain Amplifier (VGA) | Both are VGAs, so they serve the same core signal-conditioning function in a circuit. |
| Package / Case | 8-SOIC | 8-SOIC | Identical package footprint allows drop-in board replacement without layout changes. |
| Number of Pins | 8 | 8 | Matching pin count confirms physical and pinout compatibility. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting style ensures compatibility with the same PCB assembly process. |
| Supply Voltage Range | ±4.5 V to ±6.3 V | ±4.5 V to ±6.3 V | Identical supply requirements mean the same power rails can be used for either part. |
| Gain Range | -11 dB to +31 dB | -11 dB to +31 dB | Same gain range ensures equivalent signal amplification behavior in the application. |
| Bandwidth | 90 MHz | 90 MHz | Matching bandwidth preserves frequency response and high-speed performance. |
| RoHS Compliance | RoHS Compliant | Non-RoHS (legacy) | RoHS status affects regulatory compliance and suitability for new designs; the Z suffix denotes the lead-free version. |
| Part Status | Active | Obsolete | Active status ensures long-term availability; the obsolete version may face supply constraints. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD603AR | AD603ARZ |
|---|---|---|
| Series | X-AMP® | X-AMP® |
| Part Status | Obsolete | Active |
| Amplifier Type | Variable Gain | Variable Gain |
| Number of Circuits | 1 | 1 |
| Slew Rate | 275V/µs | 275V/µs |
| -3 dB Bandwidth | 90 MHz | 90 MHz |
| Current - Input Bias | 200 nA | 200 nA |
| Supply Current | 12.5mA | 12.5mA |
| Current - Output / Channel | 50 mA | 50 mA |
| Voltage - Supply Span(Min) | 9.5 V | 9.5 V |
| Voltage - Supply Span(Max) | 12.6 V | 12.6 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the AD603ARZ and the AD603AR?
The AD603ARZ and AD603AR are both gain-programmable, low-noise variable gain amplifiers (VGAs) from Analog Devices. The primary difference is the package and ordering suffix: the AD603AR is supplied in a 8-lead SOIC package in tube form, while the AD603ARZ is the RoHS-compliant version of the same 8-lead SOIC device, also supplied in tube form. The "Z" suffix denotes lead-free/RoHS compliance per Analog Devices ordering conventions.
Are the AD603ARZ and AD603AR electrically and functionally identical?
Yes. Both parts share the same datasheet specifications for the AD603 family, including a -3 dB bandwidth of 90 MHz at a gain of +10 dB, a gain range of -11 dB to +31 dB, a gain control range of 42 dB, and a supply voltage range of ±4.5 V to ±6.3 V (or 9 V to 12.6 V single supply). The AD603ARZ differs only in RoHS/lead-free construction and ordering suffix.
Can the AD603ARZ be used as a drop-in replacement for the AD603AR?
Yes, in most cases. Both are 8-lead SOIC devices with identical pinout and electrical specifications. The AD603ARZ is the RoHS-compliant equivalent, so it can replace the AD603AR in existing designs provided the assembly process supports lead-free (Pb-free) soldering and the board is qualified for the RoHS-compliant finish.
What is the gain range and bandwidth of the AD603ARZ and AD603AR?
Both devices provide a gain range of -11 dB to +31 dB with a 42 dB gain control range. The -3 dB bandwidth is 90 MHz at a gain of +10 dB. These parameters are identical for the AD603AR and AD603ARZ because they are the same silicon die in the same package.
What supply voltage do the AD603ARZ and AD603AR require?
Both parts operate from a dual supply of ±4.5 V to ±6.3 V, or a single supply of 9 V to 12.6 V. The recommended nominal supply is ±5 V. Supply voltage specifications are identical for the AD603AR and AD603ARZ.
Are the AD603ARZ and AD603AR RoHS compliant?
The AD603ARZ is RoHS compliant and lead-free, as indicated by the "Z" suffix in the Analog Devices ordering code. The AD603AR is the non-RoHS, lead-containing version. Designers requiring RoHS compliance should specify the AD603ARZ.
What package do the AD603ARZ and AD603AR use?
Both devices are offered in an 8-lead SOIC (Small Outline Integrated Circuit) package. The package outline, pin configuration, and PCB land pattern are identical between the AD603AR and AD603ARZ.
What are the key applications for the AD603ARZ and AD603AR?
Both VGAs are used in RF/IF automatic gain control (AGC) systems, ultrasound and medical imaging receivers, video and instrumentation signal chains, and radar/sonar front ends. Their low noise, wide bandwidth, and linear-in-dB gain control make them suitable for these applications, and the AD603ARZ is preferred where RoHS compliance is required.