Part A
AD8307AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2581 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker
Replacement verdict
Not a drop-in replacement
The AD8307AR and AD8300ARZ-REEL are not functionally interchangeable. The AD8307AR is a logarithmic amplifier/detector intended for RF signal measurement, while the AD8300ARZ-REEL is a precision voltage reference. Their core functions, output characteristics, and application roles differ fundamentally, so substitution in a given design is not feasible without redesign.
Different device function
Different output type
Different application role
Different signal domain
Parts at a glance
Part B
AD8300ARZ-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7544 Stückzahl
- Package
- SOIC-8
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8307AR | AD8300ARZ-REEL | Why it matters |
|---|---|---|---|
| Function / Product Type | Logarithmic Amplifier / RF Detector (demodulating log amp) | 12-bit Digital-to-Analog Converter (DAC) | These are fundamentally different device classes; one processes RF signals logarithmically while the other converts digital codes to analog voltage, so they are not functionally substitutable. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount, tape and reel) | Package and mounting style affect board footprint and assembly; both are SOIC-8 but the reel packaging of the AD8300ARZ-REEL suits automated production. |
| Supply Voltage Range | 2.7 V to 5.5 V single supply | 2.7 V to 5.5 V single supply | Both operate over the same low-voltage single-supply range, allowing use in similar 3 V/5 V systems, though their internal functions differ. |
| Primary Signal Interface | Analog RF input, analog logarithmic voltage output | Serial digital input (SPI-compatible), analog voltage output | The input/output interface determines how each part connects to a system; one accepts RF analog signals, the other accepts digital control words. |
| Resolution / Dynamic Range | ~92 dB dynamic range, log conformance over wide input | 12-bit DAC resolution | These specifications describe entirely different performance metrics (logarithmic detection range vs. DAC bit resolution) and cannot be directly compared for substitution. |
| Typical Operating Frequency / Update Rate | DC to 500 MHz RF input range | Digital update rate limited by serial interface clock | The AD8307AR is specified for high-frequency RF detection, while the AD8300ARZ-REEL operates at digital update rates, reflecting their different application domains. |
| Typical Application | RF power measurement, RSSI, signal strength indication | Digital-to-analog signal generation, trimming, control loops | Intended applications differ completely, confirming the two parts serve distinct roles and are not drop-in replacements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8307AR | AD8300ARZ-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Active |
| Number of Bits | - | 12 |
| Number of D/A Converters | - | 1 |
| Settling Time | - | 14µs (Typ) |
| Output Type | - | Voltage - Buffered |
| Differential Output | - | No |
| Data Interface | - | SPI, DSP |
| Reference Type | - | Internal |
| Voltage - Supply, Analog | - | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | - | 2.7V ~ 5.5V |
| INL / DNL(LSB) | - | ±0.5, ±0.5 |
| Architecture | - | R-2R |
| Operating Temperature | - | -40°C ~ 85°C |
| Type | Logarithmic Amplifier | - |
| Applications | Receiver Signal Strength Indication (RSSI) | - |
| Mounting Type | Surface Mount | - |
Frequently asked questions
Are the AD8307AR and AD8300ARZ-REEL functionally interchangeable?
No. The AD8307AR is a 500 MHz, 92 dB logarithmic amplifier (log amp) from Analog Devices, while the AD8300ARZ-REEL is a 12-bit digital-to-analog converter (DAC) from the same manufacturer. They perform entirely different functions and are not interchangeable.
What are the primary functions of the AD8307AR and AD8300ARZ-REEL?
The AD8307AR is a monolithic logarithmic amplifier that converts an AC signal into a DC output proportional to its decibel value, used for RSSI and signal strength measurement. The AD8300ARZ-REEL is a 12-bit voltage-output DAC that converts digital input codes into an analog output voltage.
What are the key specifications of the AD8307AR?
The AD8307AR operates over a 500 MHz bandwidth with a 92 dB dynamic range, provides a nominal 25 mV/dB logarithmic slope, and operates from a single 2.7 V to 5.5 V supply. It is offered in an 8-lead SOIC package.
What are the key specifications of the AD8300ARZ-REEL?
The AD8300ARZ-REEL is a 12-bit DAC with a voltage output, operating from a single 2.7 V to 5.5 V supply. It is supplied in an 8-lead SOIC package and is provided in tape-and-reel packaging for automated assembly.
Do the AD8307AR and AD8300ARZ-REEL share the same package and pinout?
Both devices are offered in an 8-lead SOIC package, but their pin functions differ because one is a log amplifier and the other is a DAC. Pin assignments are not compatible, so they cannot be dropped into the same PCB footprint without redesign.
Can the AD8307AR and AD8300ARZ-REEL be used together in a signal chain?
Yes, they can serve complementary roles in a signal chain. The AD8307AR can measure signal strength in the analog domain, while the AD8300ARZ-REEL can generate analog control or reference voltages from digital commands. Their functions are complementary rather than equivalent.
What supply voltage ranges do the AD8307AR and AD8300ARZ-REEL support?
Both devices operate from a single supply in the 2.7 V to 5.5 V range, making them suitable for low-voltage mixed-signal systems. Designers should still verify the exact supply and decoupling requirements in each device's datasheet.
Which device should be selected for RF signal strength measurement versus digital-to-analog conversion?
For RF signal strength measurement, the AD8307AR logarithmic amplifier is the appropriate choice. For converting digital codes to an analog voltage, the AD8300ARZ-REEL 12-bit DAC is the appropriate choice. Selection depends on the required function, not on package similarity.