Packaging information
| Package | Pins SOT-23 (DBV) | 5 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the OPA818
- High speed:
- Gain-bandwidth product (GBWP): 2.7GHz
- Bandwidth (G = 7V/V): 765MHz
- Large-signal bandwidth (2VPP): 400MHz
- Slew rate: 1400V/µs
- Decompensated gain: 7V/V stable
- Low noise:
- Input voltage noise: 2.2nV/√Hz
- Input current noise: 3fA/√Hz (f = 10kHz)
- Input bias current: 4pA (typical)
- Low input capacitance:
- Common-mode: 1.9pF
- Differential mode: 0.5pF
- Low distortion (G = 7V/V,
RL = 1kΩ, VO = 2VPP):
- HD2, HD3 at 1MHz: –104dBc, –108dBc
- HD2, HD3 at 50MHz: –57dBc, –72dBc
- Wide supply range: 6V to 13V
- Output swing: 8VPP (VS = 10V)
- Supply current: 27.7mA
- Shutdown supply current: 27µA
- Performance upgrade to OPA657
Description for the OPA818
The OPA818 is a decompensated, voltage-feedback operational amplifier for high-speed and wide-dynamic-range applications. The OPA818 has a low-noise JFET input stage that combines high gain-bandwidth with a wide supply range from 6V to 13V. The fast slew rate (1400V/µs) provides high, large-signal bandwidth and low distortion. This amplifier is manufactured using TI’s proprietary, high-speed, silicon-germanium (SiGe) process to achieve significant performance improvements over other high-speed, FET-input amplifiers.
The OPA818 is an extremely versatile, wideband TIA photodiode amp for use in optical test and communication equipment, and many medical, scientific, and industrial instruments. The OPA818 showcases a 2.7GHz GBWP, low 2.4pF total input capacitance, and 2.2nV/√Hz input noise. The OPA818 achieves over 85MHz signal bandwidth in a TIA configuration with 20kΩ TIA gain (RF) and 0.5pF photodiode capacitance (CD) with wide output swings. The low-noise architecture with picoampere of input bias current is also an excellent choice for test and measurement applications. Though typically stable in gains ≥ 7V/V, the OPA818 is designed for use in applications with lower gains by applying noise-gain shaping techniques.
The OPA818 is available in an 5-pin SOT-23 package and an 8-lead WSON package with an exposed thermal pad for heat dissipation. This device is specified for operation over the industrial temperature range of –40°C to +85°C.