Overview
The AD8334ACPZ-REEL7, produced by Analog Devices Inc., is a quad-channel, ultralow noise, linear-in-dB variable gain amplifier (VGA). This device is optimized for ultrasound systems but can be used in any application requiring low noise variable gain control at frequencies up to 100 MHz. Each channel includes an ultralow noise preamplifier (LNA), an X-AMP® VGA with a 48 dB gain range, and a selectable gain postamplifier with adjustable output limiting. The device operates on a single 5 V supply and is available in a 64-lead LFCSP package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 | - |
| Supply Voltage | 5 | V |
| Power Consumption per Channel | 145 | mW |
| Gain Range (LO Gain Mode) | -4.5 to +43.5 | dB |
| Gain Range (HI Gain Mode) | 7.5 to 55.5 | dB |
| Output-Referred Noise | 48 | nV/√Hz |
| Input Impedance | 280 to 1.13 kΩ | Ω |
| Input Capacitance | 13 | pF |
| Output Impedance | 5 | Ω |
| Small Signal Bandwidth | 100 | MHz |
| Slew Rate (LO Gain) | 275 | V/µs |
| Slew Rate (HI Gain) | 1100 | V/µs |
| Noise Figure (Active Termination Match) | 2.5 | dB |
| Harmonic Distortion (HD2, HD3) | -56 dBc, -70 dBc | - |
| Output Short-Circuit Current | 165 | mA |
| Package Type | 64-Lead LFCSP (9mm x 9mm w/ EP) | - |
Key Features
- Ultralow noise preamplifier (LNA) with adjustable input impedance to match signal sources without compromising noise performance.
- X-AMP® VGA with 48 dB of gain range and precise linear-in-dB scaling of 50 dB/V for control voltages between 40 mV and 1 V.
- Selectable gain postamplifier with adjustable output limiting.
- Differential signal paths for superb second- and third-order distortion performance and low crosstalk.
- Excellent bandwidth uniformity maintained across the entire gain range.
- Factory trim ensures excellent part-to-part and channel-to-channel gain matching.
- Single 5 V supply operation.
Applications
- Ultrasound and sonar time-gain controls.
- High performance automatic gain control (AGC) systems.
- I/Q signal processing.
- High speed, dual ADC drivers.
Q & A
- What is the AD8334ACPZ-REEL7 used for?
The AD8334ACPZ-REEL7 is used as a quad-channel, ultralow noise, linear-in-dB variable gain amplifier, particularly optimized for ultrasound systems and other applications requiring low noise variable gain control up to 100 MHz.
- What is the gain range of the AD8334ACPZ-REEL7?
The gain range of the AD8334ACPZ-REEL7 is -4.5 dB to +43.5 dB in LO gain mode and 7.5 dB to 55.5 dB in HI gain mode.
- What is the output-referred noise of the AD8334ACPZ-REEL7?
The output-referred noise of the AD8334ACPZ-REEL7 is typically 48 nV/√Hz.
- What is the input impedance of the AD8334ACPZ-REEL7?
The input impedance of the AD8334ACPZ-REEL7 can be adjusted to match signal sources and ranges from 280 Ω to 1.13 kΩ.
- What is the package type of the AD8334ACPZ-REEL7?
The AD8334ACPZ-REEL7 is available in a 64-Lead LFCSP package (9mm x 9mm w/ EP).
- What are the key applications of the AD8334ACPZ-REEL7?
The key applications include ultrasound and sonar time-gain controls, high performance AGC systems, I/Q signal processing, and high speed ADC drivers.
- How does the AD8334ACPZ-REEL7 achieve low noise performance?
The AD8334ACPZ-REEL7 achieves low noise performance through its ultralow noise preamplifier (LNA) and differential signal paths, which minimize crosstalk and distortion.
- What is the slew rate of the AD8334ACPZ-REEL7?
The slew rate of the AD8334ACPZ-REEL7 is 275 V/µs in LO gain mode and 1100 V/µs in HI gain mode.
- Does the AD8334ACPZ-REEL7 support single-ended or differential inputs?
The AD8334ACPZ-REEL7 supports single-ended inputs with differential outputs.
- What is the noise figure of the AD8334ACPZ-REEL7?
The noise figure of the AD8334ACPZ-REEL7 is typically 2.5 dB with active termination match.
