Part A
AD8306AR
ADI公司
- Lifecycle
- Active
- Stock
- 7304 件
- Package
- SOIC-16
- Series
- 線性放大器-專用
Replacement verdict
Not a drop-in replacement
The AD8306AR and AD830AR are not drop-in replacements for one another. The AD8306AR is a limiting logarithmic amplifier with RSSI and a 400 MHz bandwidth, while the AD830AR is a wideband video difference amplifier with a 85 MHz bandwidth. Their core functions, package types, and supply requirements differ substantially, so substituting one for the other is not recommended without a full redesign.
Different function type
Different package type
Different bandwidth class
Different supply requirements
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8306AR | AD830AR | Why it matters |
|---|---|---|---|
| Function | Limiting amplifier / RSSI (received signal strength indicator) | Video difference amplifier | These are fundamentally different functional blocks, so they are not substitutable in the same circuit. |
| Frequency / Bandwidth | DC to 400 MHz (limiting amplifier bandwidth) | 100 MHz (large-signal bandwidth) | Operating frequency range determines whether the part suits the target signal bandwidth. |
| Primary Output Type | Logarithmic RSSI voltage plus limited differential output | Differential voltage output (difference amplifier) | Output signal format must match the downstream signal chain. |
| Dynamic Range | Approximately 100 dB RSSI range | Not specified as RSSI (linear difference amplifier) | RSSI dynamic range is critical for signal-strength measurement applications. |
| Supply Voltage | 2.7 V to 6.5 V single supply | ±5 V to ±15 V dual supply (or equivalent single supply) | Supply requirements affect power rail compatibility and system design. |
| Package | 20-lead SOIC (R-20) | 8-lead SOIC (R-8) | Package footprint and pin count must match the PCB layout for drop-in use. |
| Typical Supply Current | Approximately 16 mA | Approximately 6.5 mA | Quiescent current impacts power budget and thermal design. |
| Input Signal Type | Differential RF input (limiting amplifier) | Differential voltage input (video/baseband) | Input interface compatibility determines whether the part can accept the source signal. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8306AR | AD830AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Applications | Receiver Signal Strength Indication (RSSI) | Differential |
| Number of Circuits | - | 1 |
| -3 dB Bandwidth | - | 85 MHz |
| Slew Rate | - | 360V/µs |
| Supply Current | - | 14.5 mA |
| Current - Output / Channel | - | 50 mA |
| Voltage - Supply, Single/Dual (±) | - | 8V ~ 33V, ±4V ~ 16.5V |
| Mounting Type | Surface Mount | Surface Mount |
| Type | Limiting-Logarithmic Amplifier | - |
Frequently asked questions
Are the AD8306AR and AD830AR functionally interchangeable?
No. The AD8306AR is a complete limiting logarithmic amplifier (limiter/log amp) with an on-chip RSSI output, operating over a wide dynamic range and specified for high-frequency signal measurement. The AD830AR is a wideband logarithmic amplifier intended for general-purpose log conversion. They differ in function, bandwidth, dynamic range, and pinout, so they are not direct substitutes.
What are the key differences in frequency range between the AD8306AR and AD830AR?
The AD8306AR is specified for operation from DC to 400 MHz with a nominal 90 dB dynamic range, making it suitable for RSSI and received-signal-strength measurement in RF systems. The AD830AR is a wideband log amplifier with a specified bandwidth of approximately 120 MHz. The AD8306AR therefore covers a higher frequency range and a wider dynamic range than the AD830AR.
Do the AD8306AR and AD830AR use the same package and pinout?
No. The AD8306AR is supplied in a 16-lead SOIC package, while the AD830AR is supplied in an 8-lead SOIC package. Because the package sizes and pin counts differ, the PCB land patterns and pin assignments are not compatible, and the two devices cannot be interchanged on the same footprint without a redesign.
Which device is better suited for RSSI measurement in a receiver chain?
The AD8306AR is the more appropriate choice for RSSI measurement because it integrates a limiting amplifier with an on-chip RSSI output and is specified for a 90 dB dynamic range over DC to 400 MHz. The AD830AR is a general-purpose wideband log amplifier and does not provide the same integrated RSSI function or specified dynamic range for receiver signal-strength indication.
What are the supply voltage and current requirements for each device?
Both devices operate from a single positive supply in the range of approximately 2.7 V to 5.5 V. The AD8306AR typically draws about 16 mA, while the AD830AR typically draws about 12 mA. Designers should confirm exact limits against the respective manufacturer datasheets for the target operating conditions.
Can the AD830AR replace the AD8306AR in an existing design?
No, not as a drop-in replacement. The AD830AR has a different package (8-lead SOIC versus 16-lead SOIC), a different pinout, a narrower specified bandwidth (approximately 120 MHz versus DC to 400 MHz), and lacks the integrated RSSI output of the AD8306AR. Any substitution would require a board redesign and revalidation of the signal chain.
Are both devices specified for the same operating temperature range?
Both the AD8306AR and AD830AR are specified for the industrial temperature range of -40°C to +85°C. This makes both devices suitable for industrial and commercial RF and signal-processing applications within that range, subject to the individual datasheet limits.