Overview
The ADA4505-2ARMZ from Analog Devices Inc. is a dual micropower operational amplifier featuring rail-to-rail input and output swings. This amplifier is part of the ADA4505-x family, which includes single, dual, and quad configurations. The ADA4505-2ARMZ is designed to optimize performance in low-power, battery-operated applications, offering excellent power supply rejection ratio (PSRR), common-mode rejection ratio (CMRR), and zero crossover distortion. It operates from a single 1.8 V to 5 V power supply or from dual ±0.9 V to ±2.5 V power supplies, making it versatile for various applications.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS | 0 V ≤ VCM ≤ 1.8 V | 0.5 | 3 | 4 | mV |
| Input Bias Current | IB | −40°C ≤ TA ≤ +85°C | 0.5 | 2 | 50 | pA |
| Input Offset Current | IOS | −40°C ≤ TA ≤ +85°C | 0.05 | 1 | 25 | pA |
| Common-Mode Rejection Ratio | CMRR | 0 V ≤ VCM ≤ 1.8 V | 85 | 100 | dB | |
| Power Supply Rejection Ratio | PSRR | VSY = 1.8 V to 5 V | 100 | 110 | dB | |
| Supply Current per Amplifier | ISY | VOUT = VSY/2 | 7 | 10 | 15 | µA |
| Slew Rate | SR | RL = 100 kΩ, CL = 20 pF, G = 1 | 0.006 | V/µs | ||
| Gain Bandwidth Product | GBP | RL = 1 MΩ, CL = 20 pF, G = 1 | 50 | kHz | ||
| Package | MSOP-8 |
Key Features
- Rail-to-Rail Input and Output: The ADA4505-2ARMZ features rail-to-rail input and output swings, ensuring full signal utilization over the entire supply voltage range.
- Low Power Consumption: With a supply current of less than 10 µA per amplifier, this device is ideal for battery-powered applications.
- Zero Crossover Distortion: The amplifier is designed to eliminate crossover distortion, providing a clean output signal.
- High PSRR and CMRR: Excellent power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR) ensure minimal errors due to power supply voltage variations and common-mode noise.
- Compact Packaging: Available in an 8-lead MSOP package, making it suitable for space-constrained designs.
Applications
- Battery-Powered Sensors: Ideal for remote battery-powered sensors due to its low power consumption and high PSRR.
- Handheld Instrumentation: Suitable for handheld instrumentation and consumer equipment where low power and compact size are critical.
- Hazard Detectors: Used in hazard detectors such as smoke, fire, and gas detectors due to its reliability and low noise characteristics.
- Patient Monitors: Beneficial in patient monitors and other medical devices requiring high accuracy and low power consumption.
Q & A
- What is the input offset voltage of the ADA4505-2ARMZ?
The input offset voltage (VOS) is typically 3 mV, with a maximum of 4 mV over the temperature range of −40°C to +125°C.
- What is the supply current per amplifier for the ADA4505-2ARMZ?
The supply current per amplifier is typically 10 µA, with a maximum of 15 µA.
- What is the slew rate of the ADA4505-2ARMZ?
The slew rate is 0.006 V/µs.
- What is the gain bandwidth product (GBP) of the ADA4505-2ARMZ?
The GBP is 50 kHz.
- What are the operating temperature ranges for the ADA4505-2ARMZ?
The device is specified for both the industrial temperature range (−40°C to +85°C) and the extended industrial temperature range (−40°C to +125°C).
- What package options are available for the ADA4505-2ARMZ?
The ADA4505-2ARMZ is available in an 8-lead MSOP package and an 8-ball WLCSP package.
- What are the key applications of the ADA4505-2ARMZ?
The key applications include battery-powered sensors, handheld instrumentation, hazard detectors, and patient monitors.
- Does the ADA4505-2ARMZ have zero crossover distortion?
Yes, the ADA4505-2ARMZ is designed to eliminate crossover distortion, providing a clean output signal.
- What is the common-mode rejection ratio (CMRR) of the ADA4505-2ARMZ?
The CMRR is typically 100 dB.
- Is the ADA4505-2ARMZ RoHS compliant?
Yes, the ADA4505-2ARMZ is RoHS compliant.
