Overview
The TLV2221CDBVR, produced by Texas Instruments, is a single low-voltage operational amplifier that belongs to the Advanced LinCMOS family. This device is available in the SOT-23 package, which is ultra-small and requires only one third the board space of the standard 8-pin SOIC package. This compact design allows for placement close to the signal source, minimizing noise pick-up from long PCB traces. The TLV2221 is fully characterized at 3 V and 5 V, making it optimized for low-voltage applications. It features high input impedance, low noise, and micropower dissipation, making it suitable for hand-held monitoring and remote-sensing applications.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VIO (Input Offset Voltage) | VDD± = ±1.5 V, VIC = 0, VO = 0 | - | 610 | 620 | µV |
| IIO (Input Offset Current) | VDD± = ±1.5 V, RS = 50 Ω, VIC = 0, VO = 0 | - | 0.5 | 0.5 | pA |
| IIB (Input Bias Current) | RS = 50 Ω | - | 1 | 1 | pA |
| VICR (Common-Mode Input Voltage Range) | | VIO| ≤5 mV, RS = 50 Ω | -0.3 | - | VDD-0.3 | V |
| kSVR (Supply Voltage Rejection Ratio) | VDD = 2.7 V to 8 V, VIC = 0, No load | - | 95 | 95 | dB |
| IDD (Supply Current) | VO = 0, No load | - | 100 | 100 | µA |
Key Features
- Rail-to-Rail Output: The TLV2221 features rail-to-rail output, making it suitable for interfacing with analog-to-digital converters (ADCs) and other applications requiring full output swing.
- High Input Impedance and Low Noise: Ideal for small-signal conditioning for high-impedance sources such as piezoelectric transducers.
- Micropower Dissipation: Low power consumption, which is beneficial for battery-powered and hand-held devices.
- Compact SOT-23 Package: Requires only one third the board space of the standard 8-pin SOIC package, allowing for close placement to the signal source and minimizing noise pick-up.
- Optimized Pinout: Designed to prevent coupling or leakage paths and to facilitate easy placement of gain setting resistors and decoupling capacitors.
Applications
- Hand-Held Monitoring Devices: Suitable due to its low power consumption and compact size.
- Remote Sensing: Ideal for applications requiring low power and high input impedance.
- Analog-to-Digital Converter Interfaces: The rail-to-rail output feature makes it a great choice for interfacing with ADCs.
- Small-Signal Conditioning: Excellent for conditioning signals from high-impedance sources like piezoelectric transducers.
Q & A
- What is the typical supply current of the TLV2221?
The typical supply current (IDD) of the TLV2221 is 100 µA at VO = 0 and no load.
- What is the common-mode input voltage range of the TLV2221?
The common-mode input voltage range (VICR) is from -0.3 V to VDD-0.3 V.
- What is the input offset voltage of the TLV2221?
The input offset voltage (VIO) is typically 610 µV at VDD± = ±1.5 V, VIC = 0, and VO = 0.
- What package types are available for the TLV2221?
The TLV2221 is available in the SOT-23 package.
- What are the key features of the TLV2221's pinout design?
The pinout is optimized to prevent coupling or leakage paths and to facilitate easy placement of gain setting resistors and decoupling capacitors.
- What are some typical applications of the TLV2221?
Typical applications include hand-held monitoring devices, remote sensing, analog-to-digital converter interfaces, and small-signal conditioning for high-impedance sources.
- What is the supply voltage rejection ratio of the TLV2221?
The supply voltage rejection ratio (kSVR) is typically 95 dB from VDD = 2.7 V to 8 V.
- How does the TLV2221's compact package benefit design?
The compact SOT-23 package allows for placement close to the signal source, minimizing noise pick-up from long PCB traces.
- What is the input bias current of the TLV2221?
The input bias current (IIB) is typically 1 pA at RS = 50 Ω.
- Is the TLV2221 suitable for low-voltage applications?
Yes, the TLV2221 is fully characterized at 3 V and 5 V and is optimized for low-voltage applications.
