Overview
The AD8426BCPZ-R7, produced by Analog Devices Inc., is a dual-channel, low-cost, wide supply range instrumentation amplifier. This component is designed to be highly versatile and efficient, making it ideal for multichannel, space-constrained industrial applications. The AD8426 features a compact 16-lead Lead Frame Chip Scale Package (LFCSP) with no exposed metal pad, which enhances PCB routing and reduces the need for vias. It operates over a wide temperature range of −40°C to +125°C and supports both single and dual supply configurations, ranging from 2.2 V to 36 V for single supply and ±1.35 V to ±18 V for dual supply.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (Single) | 2.2 | 36 | V | |
| Supply Voltage (Dual) | ±1.35 | ±18 | V | |
| Gain Range | 1 | 1000 | V/V | |
| Bandwidth (G = 1) | 1 | MHz | ||
| Common Mode Rejection Ratio (G = 1) | 80 | dB | ||
| Input Bias Current | 5 | 20 | 30 | nA |
| Input Offset Voltage | 5 | µV | ||
| Slew Rate (G = 1) | 0.4 | V/μs | ||
| Settling Time (0.01% for 2 V step, G = 1) | 6 | μs | ||
| Temperature Range | −40 | +125 | °C |
Key Features
- Compact Package: The AD8426 comes in a 16-lead LFCSP package, which is equivalent in board space to a typical MSOP package, but without an exposed metal pad, allowing for more routing room and no current leakage to the pad.
- Wide Supply Range: Operates with single supply voltages from 2.2 V to 36 V and dual supply voltages from ±1.35 V to ±18 V.
- Gain Flexibility: Gain can be set with a single external resistor, ranging from 1 to 1000.
- Input Protection: Inputs are protected beyond the supply rails, and the amplifier can handle voltages beyond the rails without damage.
- Low Noise and High CMRR: Features low input noise of 24 nV/√Hz and a high common mode rejection ratio (CMRR) of up to 110 dB.
- Efficient PCB Routing: The logical arrangement of the amplifiers minimizes PCB routing complexity, reducing the need for long routes and vias.
Applications
- Industrial Process Controls: Suitable for monitoring and controlling various industrial processes due to its robust input protection and wide operating range.
- Bridge Amplifiers: Ideal for bridge transducer applications where high accuracy and low noise are critical.
- Medical Instrumentation: Used in medical devices requiring precise signal amplification and high CMRR.
- Portable Data Acquisition: Its low power consumption and compact size make it suitable for portable data acquisition systems.
- Multichannel Systems: Perfect for applications requiring multiple channels of signal amplification in a limited space.
Q & A
- What is the temperature range of the AD8426BCPZ-R7?
The AD8426BCPZ-R7 operates over a temperature range of −40°C to +125°C.
- What are the supply voltage ranges for the AD8426BCPZ-R7?
The AD8426BCPZ-R7 can operate with single supply voltages from 2.2 V to 36 V and dual supply voltages from ±1.35 V to ±18 V.
- How is the gain set for the AD8426BCPZ-R7?
The gain can be set with a single external resistor, allowing for a gain range from 1 to 1000.
- What is the bandwidth of the AD8426BCPZ-R7 at a gain of 1?
The bandwidth at a gain of 1 is 1 MHz.
- What is the common mode rejection ratio (CMRR) of the AD8426BCPZ-R7?
The CMRR is up to 110 dB.
- How much current does the AD8426BCPZ-R7 typically consume per amplifier?
The typical supply current per amplifier is 350 μA.
- What are the key advantages of the LFCSP package of the AD8426BCPZ-R7?
The LFCSP package provides more routing room and eliminates current leakage to the pad, making PCB routing easier and more efficient.
- Can the AD8426BCPZ-R7 handle input voltages beyond the supply rails?
- What are some typical applications of the AD8426BCPZ-R7?
Typical applications include industrial process controls, bridge amplifiers, medical instrumentation, portable data acquisition, and multichannel systems.
- Is the AD8426BCPZ-R7 suitable for space-constrained designs?
