Part A
AD8367ARUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1680 PCS
- Package
- TSSOP-14
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8369ARUZ and AD8367ARUZ are both digitally controlled variable gain amplifiers from Analog Devices in the same TSSOP-20 package, sharing a closely related core architecture and supply requirements. While the AD8367ARUZ offers a wider gain range and higher bandwidth, the AD8369ARUZ provides a finer 3 dB gain step resolution. The AD8367ARUZ can serve as a functional replacement candidate for the AD8369ARUZ in many applications, but the differences in gain range, step size, and bandwidth must be validated against the specific signal-chain requirements before substitution.
Gain Range
Validation required
Gain Step Resolution
Validation required
Bandwidth
Validation required
Package Type
High match
Parts at a glance
Part B
AD8369ARUZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4576 PCS
- Package
- TSSOP-16
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8369ARUZ | AD8367ARUZ | Why it matters |
|---|---|---|---|
| Function Type | Digitally Controlled Variable Gain Amplifier (VGA) | Analog Controlled Variable Gain Amplifier (VGA) | Determines the control interface: digital (SPI/parallel) vs analog gain control voltage, which affects system architecture and microcontroller requirements. |
| Frequency Range | LF to 600 MHz | LF to 500 MHz | Defines the operating bandwidth; the AD8369ARUZ extends usable gain up to 600 MHz, enabling higher-frequency applications. |
| Gain Control Range | -10 dB to +35 dB (45 dB range) | -2.5 dB to +42.5 dB (45 dB range) | Both offer 45 dB of range but with different endpoints; the offset affects the available attenuation and maximum gain in the signal chain. |
| Gain Control Interface | 3-wire SPI / parallel digital (4-bit) | Analog voltage (0 V to 1 V) | Digital control allows precise, repeatable gain steps and easy microcontroller interfacing; analog control suits continuous AGC loops. |
| Gain Step Size | 3 dB per step (digital) | Continuous (analog, ~20 mV/dB slope) | Discrete 3 dB steps give predictable calibrated gain settings, while continuous analog control enables smooth AGC without quantization. |
| Noise Figure | ~7.5 dB (at max gain) | ~7.5 dB (at max gain) | Noise figure sets the sensitivity floor of the receive chain; comparable values mean similar low-level signal handling. |
| Output IP3 (OIP3) | ~19 dBm (at 70 MHz) | ~20 dBm (at 70 MHz) | OIP3 indicates linearity and dynamic range; higher OIP3 allows handling stronger signals before distortion, relevant for blocking and intermodulation performance. |
| Supply Voltage | 5 V (single supply) | 5 V (single supply) | Identical supply requirements simplify power design and allow drop-in compatibility in the same rail architecture. |
| Package | 16-lead TSSOP | 14-lead TSSOP | Different pin counts and footprints mean the parts are not board-level drop-in replacements; PCB layout must be redesigned. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings ensure equivalent environmental robustness for both parts. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8367ARUZ | AD8369ARUZ |
|---|---|---|
| Series | X-AMP® | X-AMP® |
| Part Status | Active | Active |
| Amplifier Type | Variable Gain | Variable Gain |
| Number of Circuits | 1 | 1 |
| -3 dB Bandwidth | 500 MHz | 600 MHz |
| Current - Input Bias | 27 µA | 160 µA |
| Supply Current | 26mA | 37mA |
| Voltage - Supply Span(Min) | 2.7 V | 3 V |
| Voltage - Supply Span(Max) | 5.5 V | 5.5 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Slew Rate | - | 1200V/µs |
Frequently asked questions
What are the primary functional differences between the AD8369ARUZ and AD8367ARUZ?
The AD8369ARUZ is a digitally controlled variable gain amplifier (VGA) with a gain range of -5 dB to +40 dB, controlled via a 4-bit parallel or SPI-compatible serial interface. The AD8367ARUZ is an analog-controlled VGA with a gain range of -2.5 dB to +42.5 dB, controlled by an analog voltage on the GAIN pin. Both are 45 dB range VGAs in 14-lead TSSOP packages, but the AD8369 uses digital gain control while the AD8367 uses analog gain control.
Are the AD8369ARUZ and AD8367ARUZ pin-compatible?
No. Although both devices are housed in 14-lead TSSOP (RU-14) packages, their pin functions differ. The AD8369ARUZ uses pins for a 4-bit digital gain control interface (or SPI), while the AD8367ARUZ uses a single analog GAIN pin. Pin assignments and external component requirements differ, so they are not drop-in replacements.
What is the operating frequency range of each device?
Both the AD8369ARUZ and AD8367ARUZ are specified for operation from DC to 1 GHz, with the AD8367ARUZ characterized for IF and RF applications up to 500 MHz in its datasheet specifications. Designers should consult the respective datasheets for gain and linearity performance at specific frequencies of interest.
How does gain control differ between the AD8369ARUZ and AD8367ARUZ?
The AD8369ARUZ provides digital gain control via a 4-bit parallel word or SPI-compatible serial interface, offering 16 discrete gain steps across its -5 dB to +40 dB range. The AD8367ARUZ provides continuous analog gain control via a voltage applied to the GAIN pin, with a gain slope of approximately 20 mV/dB and a range of -2.5 dB to +42.5 dB.
What are the supply voltage and power consumption specifications for these VGAs?
Both the AD8369ARUZ and AD8367ARUZ operate from a single 5 V supply. The AD8369ARUZ typically draws about 40 mA, while the AD8367ARUZ typically draws about 26 mA. Designers should verify exact quiescent current and power dissipation from the manufacturer datasheets for their operating conditions.
Which device is better suited for automatic gain control (AGC) loops?
The AD8367ARUZ is generally preferred for analog AGC loops because its continuous analog gain control interface allows smooth, continuous gain adjustment with a defined dB-per-volt slope. The AD8369ARUZ, with its digital step control, is better suited for systems where gain is set by a microcontroller or DSP via SPI or parallel control rather than a closed-loop analog AGC detector.
Do both devices offer the same output power and linearity performance?
No. The AD8367ARUZ is specified with an output third-order intercept (OIP3) of approximately 20 dBm at 70 MHz and can deliver about 8 dBm output power at 1 dB compression. The AD8369ARUZ has different linearity and output compression specifications. Exact OIP3, P1dB, and noise figure values should be taken from the respective manufacturer datasheets, as they vary with frequency and gain setting.
Can the AD8369ARUZ and AD8367ARUZ be used in the same signal chain?
Yes, they can be used together in a signal chain, but each must be configured according to its own control interface and external component requirements. The AD8367ARUZ could serve as an analog AGC stage while the AD8369ARUZ provides digitally stepped gain, provided the system accounts for their different gain ranges, supply current, and pin configurations.