Overview
The AD848SQ/883B is a high-speed, low-power monolithic operational amplifier produced by Analog Devices Inc. This device is part of the AD848 and AD849 family, which are known for their fast AC and good DC performance. The AD848 is internally compensated, making it stable for closed-loop gains of 5 or greater, while the AD849 is fully decompensated and stable at gains greater than 24. These op amps utilize Analog Devices’ junction isolated complementary bipolar (CB) process, enabling high speed with a relatively low supply current of 4.8 mA.
Key Specifications
| Parameter | Min | Max | Units | |
|---|---|---|---|---|
| Gain Bandwidth | - | 175 MHz | - | - |
| Supply Current | 4.8 mA | - | 6.0 mA | - |
| Slew Rate | - | 300 V/μs | - | - |
| Settling Time to 0.1% for a 10 V Step | - | 80 ns | - | - |
| Input Offset Voltage | 0.2 mV | 1 mV | 2.3 mV | - |
| Input Bias Current | 3.3 μA | - | 6.6 μA | - |
| Input Offset Current | 50 nA | - | 300 nA | - |
| Open Loop Gain | 9 V/mV | - | 13 V/mV | - |
| Input Capacitance | - | 1.5 pF | - | - |
| Output Resistance | - | 15 Ω | - | - |
| Power Supply Operating Range | ±4.5 V | - | ±18 V | - |
Key Features
- High speed with 175 MHz gain bandwidth for the AD848 and 725 MHz for the AD849.
- Low power consumption with a supply current of 4.8 mA.
- High slew rate of 300 V/μs and fast settling time of 80 ns to 0.1% for a 10 V step.
- Low input voltage noise of 3 nV/√Hz for the AD849.
- Stable operation into any capacitive load without oscillation.
- Available in various packages including plastic, hermetic cerdip, and small outline packages.
Applications
- Cable drivers.
- 8- and 10-bit data acquisition systems.
- Video and RF amplification.
- Signal generators.
Q & A
- What is the gain bandwidth of the AD848?
The gain bandwidth of the AD848 is 175 MHz.
- What is the typical supply current for the AD848?
The typical supply current for the AD848 is 4.8 mA.
- What is the slew rate of the AD848?
The slew rate of the AD848 is 300 V/μs.
- How long does it take for the AD848 to settle to 0.1% for a 10 V step?
The AD848 settles to 0.1% for a 10 V step in 80 ns.
- What is the input offset voltage of the AD848?
The input offset voltage of the AD848 is typically 1 mV, with a maximum of 2.3 mV.
- Is the AD848 stable with capacitive loads?
Yes, the AD848 is stable into any capacitive load without oscillation.
- In what packages is the AD848 available?
The AD848 is available in plastic, hermetic cerdip, and small outline packages.
- What are some common applications of the AD848?
The AD848 is commonly used in cable drivers, 8- and 10-bit data acquisition systems, video and RF amplification, and signal generators.
- What is the input voltage noise density of the AD848?
The input voltage noise density of the AD848 is 5 nV/√Hz.
- What is the operating temperature range for the AD848?
The operating temperature range for the AD848 is from -55°C to +125°C.
