Overview
The AD834JN, produced by Analog Devices Inc., is a monolithic, laser-trimmed four-quadrant analog multiplier designed for high-frequency applications. It features a transconductance bandwidth exceeding 500 MHz from either of the differential voltage inputs, making it suitable for a wide range of high-speed nonlinear operations. The device is known for its high static accuracy, low input and output offsets, and accurate scale factor. Its performance is relatively insensitive to temperature and supply variations, thanks to stable biasing based on a band gap reference generator.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Transfer Function (W = XY) | - | (1V)^2 × 4 mA | - | - |
| Total Error (Figure 6) | - | ±0.5% | - | % FS |
| Bandwidth | - | 500 MHz | - | - |
| Feedthrough, X | 0.2% | 0.3% | - | % FS |
| Feedthrough, Y | 0.1% | 0.2% | - | % FS |
| AC Feedthrough, X | -60 dB (at 10 MHz) | -44 dB (at 100 MHz) | - | - |
| Distortion, Y | -65 dB (at 10 MHz) | -50 dB (at 100 MHz) | - | - |
| Zero Signal Current Each Output | 8.5 mA | - | - | - |
| Differential Offset | ±20 µA | - | - | - |
| Output Compliance | 4.75 V | 9 V | - | - |
| Noise Spectral Density | 16 nV/√Hz | - | - | - |
| Operating Range | ±4 V | - | ±9 V | - |
| Quiescent Current (+VS) | 11 mA | 14 mA | - | - |
| Quiescent Current (-VS) | 28 mA | 35 mA | - | - |
| Operating Temperature Range | 0°C to 70°C (Commercial) | -40°C to +85°C (Industrial) | -55°C to +125°C (Military) | - |
Key Features
- High static accuracy with low input and output offsets and accurate scale factor.
- Transconductance bandwidth exceeding 500 MHz from either of the differential voltage inputs.
- Low distortion levels (better than –60 dB on either input) at high frequencies.
- Low signal feedthrough (typically –65 dB up to 20 MHz).
- Low differential phase error over the input range—typically 0.08° at 5 MHz and 0.8° at 50 MHz.
- Large signal transient response free from overshoot, with an intrinsic rise time of 500 ps, typically settling to within 1% in under 5 ns.
- Nonloading, high impedance, differential inputs simplify the application.
- Supply voltages from ±4 V to ±9 V.
- Low power consumption (280 mW typical at VS = ±5 V).
Applications
- High-speed real-time computation.
- Wideband modulation and gain control.
- Signal correlation and RF power measurement.
- Voltage-controlled filters and oscillators.
- Linear keyers for high-resolution television.
- Wideband true RMS conversion.
- Analog division, square rooting, and vector addition.
Q & A
- What is the primary function of the AD834JN?
The AD834JN is a four-quadrant analog multiplier intended for use in high-frequency applications.
- What is the transconductance bandwidth of the AD834JN?
The transconductance bandwidth exceeds 500 MHz from either of the differential voltage inputs.
- What are the typical supply voltages for the AD834JN?
The supply voltages range from ±4 V to ±9 V.
- What is the typical quiescent current for the AD834JN?
The typical quiescent current is 11 mA for +VS and 28 mA for -VS at VS = ±5 V.
- What are the operating temperature ranges for the AD834JN?
The operating temperature ranges are 0°C to 70°C for commercial, -40°C to +85°C for industrial, and -55°C to +125°C for military versions.
- How does the AD834JN handle high-frequency distortion?
The AD834JN exhibits low distortion levels (better than –60 dB on either input) at high frequencies.
- What is the differential phase error of the AD834JN?
The differential phase error is typically 0.08° at 5 MHz and 0.8° at 50 MHz.
- How does the AD834JN's transient response perform?
The large signal transient response is free from overshoot, with an intrinsic rise time of 500 ps, typically settling to within 1% in under 5 ns.
- What are some common applications of the AD834JN?
Common applications include high-speed real-time computation, wideband modulation and gain control, signal correlation, and RF power measurement.
- How do I convert the differential output of the AD834JN to a single-ended output?
To convert the differential output to a single-ended output, you may use a wideband transformer, balun, or active circuitry such as an op amp.
