LT1028 vs OPA627
Update Time: Nov 08, 2023 Readership: 647
Contents
Operational amplifiers (op-amps) are foundational components in the world of electronics, serving as the building blocks for a wide range of applications, from precision instrumentation to high-fidelity audio equipment. The LT1028 and OPA627 each represent a pinnacle of op-amp engineering, renowned for their precision, low noise, and versatility. These op-amps cater to different niches of the electronics world, and understanding their unique attributes is crucial for selecting the most suitable component for your project. Without further ado, let's explore how the LT1028 and OPA627 stack up against each other.
LT1028 Features
LT1028 are op-amps that set a high standard for noise performance, precision, and speed, making them well-suited for demanding applications where signal accuracy and low noise are paramount.
Ultra-Low Noise Performance: The LT1028 is recognized for their exceptionally low noise performance, with a noise specification of 0.85nV/√Hz at 1kHz and 1.0nV/√Hz at 10Hz. This level of noise performance is crucial for applications where even the smallest amounts of noise can degrade signal quality.
High Speed Specifications: The LT1028 has a gain-bandwidth product of 75MHz. This indicates their capability to handle high-frequency signals effectively, making them suitable for high-speed signal processing and amplification.
Distortion-Free Output: These op-amps are designed to provide a distortion-free output, which is vital for maintaining signal fidelity, especially in audio applications.
Precision Parameters: The op-amps exhibit true precision characteristics, including a low temperature drift of 0.1µV/°C, low offset voltage of 10µV, and a very high voltage gain of 30 million.
Low Input Bias Current: Despite the low voltage noise characteristics, the input stage of the LT1028 operates at only 1mA of collector current, keeping input bias current low at 25nA. Low input bias current is important in applications where the input signal source should not be significantly loaded.
Negligible Contribution to Total System Noise: The passage highlights that the voltage noise of the LT1028 is less than that of a 50Ω resistor. This means that even in applications with very low source impedance, such as transducers or audio amplifiers, the contribution of these op-amps to the total system noise will be negligible, ensuring high signal fidelity.
|
Characteristic |
LT1028 |
|
Voltage Noise |
1.1nV/√Hz Max. at 1kHz |
|
0.85nV/√Hz Typ. at 1kHz |
|
|
1.0nV/√Hz Typ. at 10Hz |
|
|
35nVP-P Typ., 0.1Hz to 10Hz |
|
|
Gain-Bandwidth Product |
50MHz Min. |
|
Slew Rate |
11V/µs Min. |
|
Offset Voltage |
40µV Max. |
|
Drift with Temperature |
0.8µV/°C Max. |
|
Voltage Gain |
7 Million Min. |
|
Voltage and Current Noise |
100% Tested |
|
Package |
Available in 8-Pin SO Package |
OPA627 Features
The OPA627 is a precision operational amplifier (op-amp) manufactured by Texas Instruments. It is known for its high-performance characteristics and is often used in applications where precision and low noise are critical. The OPA627 is widely used in applications such as audio amplifiers, high-precision instrumentation, data acquisition systems, and more, where accuracy and low noise performance are essential. It is a versatile and reliable op-amp for demanding applications.
High Precision: The OPA627 is designed for applications that require high precision. It has low input offset voltage and low input bias current, which makes it suitable for applications where accuracy is essential.
Low Noise: This op-amp has low noise characteristics, making it suitable for applications in which minimizing noise and distortion is crucial, such as audio amplification and high-resolution measurement systems.
Wide Bandwidth: The OPA627 offers a wide bandwidth, which means it can handle high-frequency signals effectively. This feature is useful in applications like high-speed data acquisition and signal processing.
Low Distortion: It has low harmonic distortion, which is essential for applications that require high-fidelity amplification, such as audio equipment.
High Slew Rate: The op-amp has a high slew rate, which allows it to respond quickly to changes in the input signal. This feature is valuable in applications that involve fast signal transitions.
Low Quiescent Current: The OPA627 is designed to operate with low quiescent current, making it suitable for battery-powered or low-power applications.
Wide Supply Voltage Range: It can operate from a wide range of supply voltages, which provides flexibility in various applications.
Single and Dual Versions: The OPA627 is available in both single and dual configurations, allowing it to be used in various circuit designs.
|
Characteristic |
Value |
|
Number of channels |
1 |
|
Vos (offset voltage at 25°C) (max) (mV) |
0.1 |
|
GBW (typ) (MHz) |
16 |
|
Slew rate (typ) (V/µs) |
55 |
|
Offset drift (typ) (µV/°C) |
0.4 |
|
Iq per channel (typ) (mA) |
7 |
|
Vn at 1 kHz (typ) (nV√Hz) |
5.2 |
|
CMRR (typ) (dB) |
110 |
|
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) |
36 |
|
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) |
9 |
|
Rail-to-rail |
No |
|
Input bias current (max) (pA) |
5 |
|
Iout (typ) (A) |
0.045 |
|
Architecture |
FET |
|
Input common mode headroom (to negative supply) (typ) (V) |
3.5 |
|
Input common mode headroom (to positive supply) (typ) (V) |
-3.5 |
|
Output swing headroom (to negative supply) (typ) (V) |
2.7 |
|
Output swing headroom (to positive supply) (typ) (V) |
-2.7 |
|
THD + N at 1 kHz (typ) (%) |
0.00003 |
|
Features |
Burr-Brown™ Audio |
|
Rating |
Catalog |
|
Operating temperature range (°C) |
-25 to 85 |
LT1028 vs OPA627
The LT1028 and OPA627 are both precision operational amplifiers (op-amps) known for their high-performance characteristics, but they are made by different manufacturers (LT1028 by Linear Technology/Analog Devices and OPA627 by Texas Instruments).
-
Gain Stability
LT1028: As mentioned earlier, the LT1028 is designed to be stable at a gain of -1, making it suitable for inverting amplifier configurations.
OPA627: The OPA627 is a unity-gain stable op-amp, which means it is optimized for applications that require a gain of one (non-inverting configuration).
-
Gain-Bandwidth Product
LT1028: The LT1028 has a gain-bandwidth product of 75 MHz, which provides a relatively high bandwidth for high-frequency applications.
OPA627: The OPA627 has a lower gain-bandwidth product of approximately 16 MHz, which is still suitable for many precision applications but not as high as the LT1028.
|
Characteristic |
LT1028 |
OPA627 |
|
Gain Stability |
Stable at a gain of -1 (inverting config.) |
Stable at unity gain (non-inverting config.) |
|
Gain-Bandwidth Product |
75 MHz |
Approximately 16 MHz |
Final Words
In the quest for excellence in op-amp performance, both the LT1028 and OPA627 deliver on their promises of precision, low noise, and top-tier characteristics. While the LT1028 boasts ultra-low noise and high-speed specifications, making it a perfect choice for applications demanding exceptional signal fidelity and bandwidth, the OPA627 is celebrated for its high-precision, low distortion, and versatile performance.
LT1028 Op Amps Low Noise Operational Amplifier In Stock: Pcs
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