Overview
The OPA615IDGST, produced by Texas Instruments, is a wide-bandwidth, DC restoration circuit that integrates a high-speed Operational Transconductance Amplifier (OTA) and a fast sampling comparator. This component is designed for applications requiring precise DC restoration, offset clamping, and high-speed data acquisition. It is particularly useful in stabilizing video signals and can also function as a sample-and-hold amplifier. The OPA615IDGST is available in both SO-14 and MSOP-10 packages, making it versatile for various design needs.
Key Specifications
| Parameter | Typical Value | Minimum/Maximum Value |
|---|---|---|
| Bandwidth (OTA) | 710 MHz | |
| Bandwidth (Comparator) | 730 MHz | |
| Propagation Delay | 1.9 ns | |
| Input Bias Current | ±1 μA | ±3.5 μA (max over temperature) |
| Output Offset Current | ±10 μA | ±80 μA (max over temperature) |
| Input Impedance | 200 || 1.2 kΩ || pF | |
| Input Differential Voltage Range | ±3.0 V | |
| Input Common-Mode Voltage Range | ±3.2 V | |
| Common-Mode Rejection Ratio (CMRR) | ±2 dB | ±50 dB (min over temperature) |
| Minimum Operating Voltage | ±4 V | |
| Maximum Operating Voltage | ±6.2 V | |
| Maximum Quiescent Current | 16 mA | |
| Thermal Resistance (θ JA) | 125 °C/W (MSOP-10), 100 °C/W (SO-14) | |
| Operating Temperature Range | –40°C to +85°C |
Key Features
- High-speed Operational Transconductance Amplifier (OTA) with a bandwidth of 710 MHz.
- Fast sampling comparator with a bandwidth of 730 MHz.
- Low input bias current of ±1 μA.
- Adjustable transconductance and quiescent current via external resistor.
- TTL-compatible switching stage for fast control.
- High common-mode rejection ratio (CMRR).
- Available in SO-14 and MSOP-10 packages.
- Wide operating temperature range from –40°C to +85°C.
Applications
- Video DC level restoration and hum suppression.
- High-speed data acquisition systems.
- CAD monitors and CCD image processing.
- Nanosecond pulse integration and peak detection.
- Pulse code modulation and demodulation.
- Sample-and-hold amplifiers.
Q & A
- What is the primary function of the OPA615IDGST?
The OPA615IDGST is a complete subsystem for DC restoration, offset clamping, and high-speed sampling applications.
- What are the bandwidths of the OTA and the sampling comparator?
The OTA has a bandwidth of 710 MHz, and the sampling comparator has a bandwidth of 730 MHz.
- What is the propagation delay of the OPA615IDGST?
The propagation delay is 1.9 ns.
- What is the input bias current of the OPA615IDGST?
The input bias current is ±1 μA.
- Can the transconductance and quiescent current be adjusted?
Yes, they can be adjusted using an external resistor.
- What are the available package options for the OPA615IDGST?
The component is available in both SO-14 and MSOP-10 packages.
- What is the operating temperature range of the OPA615IDGST?
The operating temperature range is from –40°C to +85°C.
- What are some common applications of the OPA615IDGST?
Common applications include video DC level restoration, high-speed data acquisition, CAD monitors, CCD image processing, and sample-and-hold amplifiers.
- What is the maximum operating voltage for the OPA615IDGST?
The maximum operating voltage is ±6.2 V.
- What is the thermal resistance of the OPA615IDGST in MSOP-10 and SO-14 packages?
The thermal resistance is 125 °C/W for the MSOP-10 package and 100 °C/W for the SO-14 package.
