Overview
The AD204JN is a low-cost, miniature isolation amplifier produced by Analog Devices Inc. This device is designed for reliable signal isolation in noisy environments and is part of the AD204 series, which are general-purpose, two-port, transformer-coupled isolation amplifiers. The AD204JN offers complete isolation between the input and output stages, including both signal and power isolation, all within a single compact plastic package (available in PDIP and SIP styles).
Key Specifications
| Parameter | AD204JN |
|---|---|
| Gain Range | 1 V/V to 100 V/V |
| Gain Error | ±0.5% typ (±4% max) |
| Gain vs. Temperature | ±20 ppm/°C typ (±45 ppm/°C max) |
| Gain vs. Time | ±50 ppm/1000 Hours |
| Gain vs. Supply Voltage | ±0.01%/V |
| Nonlinearity (G = 1 V/V) | ±0.05% max (±0.025% max for K Grade) |
| Input Voltage Range | 15 V ± 10% |
| Power Consumption | 35 mW |
| Bandwidth (Full-Power) | 5 kHz |
| Common-Mode Isolation | ±2000 V pk (K Grade), ±1000 V pk (J Grade) |
| Common-Mode Rejection Ratio (CMRR) | 130 dB (Gain = 100 V/V) |
| Operating Temperature Range | 0°C to 70°C |
| Storage Temperature Range | -40°C to +85°C |
Key Features
- High Isolation: Provides ±2000 V pk continuous common-mode isolation (K Grade) and ±1000 V pk (J Grade).
- Low Power Consumption: Consumes only 35 mW of power, making it ideal for applications with large channel counts or tight power budgets.
- Wide Bandwidth: Full-power bandwidth of 5 kHz, suitable for wideband signals and control loops.
- Excellent Common-Mode Performance: CMRR of 130 dB at a gain of 100 V/V and very low leakage current.
- Flexible Input: Includes an uncommitted op amp at the input for buffering, gain adjustment, and various input functions such as filtering and current input.
- Isolated Power Outputs: Can supply isolated power of ±7.5 V at 2 mA, sufficient for operating low-drift input preamps or powering ancillary circuits.
Applications
- Multichannel Data Acquisition: Suitable for systems requiring multiple isolated channels.
- Current Shunt Measurements: Ideal for measuring current in high-voltage or high-noise environments.
- Motor Controls: Used in motor control systems to isolate feedback signals.
- Process Signal Isolation: Isolates process signals to protect against noise and ensure signal integrity.
- High Voltage Instrumentation Amplifier: Used in high-voltage measurement applications requiring galvanic isolation.
Q & A
- What is the primary function of the AD204JN isolation amplifier?
The AD204JN is designed to provide galvanic isolation between the input and output stages, allowing signals to be measured, processed, and transmitted without a direct electrical connection.
- What are the available package styles for the AD204JN?
The AD204JN is available in 10-Lead PDIP and SIP packages.
- What is the gain range of the AD204JN?
The gain range of the AD204JN is from 1 V/V to 100 V/V.
- What is the common-mode isolation voltage for the AD204JN (K Grade)?
The common-mode isolation voltage for the AD204JN (K Grade) is ±2000 V pk.
- What is the power consumption of the AD204JN?
The AD204JN consumes 35 mW of power.
- What is the bandwidth of the AD204JN?
The full-power bandwidth of the AD204JN is 5 kHz.
- Does the AD204JN have isolated power outputs?
Yes, the AD204JN can supply isolated power of ±7.5 V at 2 mA.
- What is the common-mode rejection ratio (CMRR) of the AD204JN?
The CMRR of the AD204JN is 130 dB at a gain of 100 V/V.
- What are some typical applications of the AD204JN?
Typical applications include multichannel data acquisition, current shunt measurements, motor controls, process signal isolation, and high-voltage instrumentation.
- Is the AD204JN suitable for high-noise environments?
Yes, the AD204JN is designed to operate reliably in noisy environments due to its high isolation and common-mode rejection capabilities.
