Part A
AD8307AR
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 2581 PCS
- Package
- SOIC-8
- Series
- 선형 증폭기 - 전용
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
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 7544 PCS
- Package
- SOIC-8
- Series
- 데이터 수집 - 다이 모드 변환기(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.