Overview
The AD847JRZ-REEL7, produced by Analog Devices Inc., is a high-speed, low-power monolithic operational amplifier. This component represents a significant breakthrough in amplifier technology, offering superior AC and DC performance at a low cost. The AD847 is fabricated using Analog Devices’ proprietary complementary bipolar (CB) process, enabling the construction of pnp and npn transistors with similar fTs in the 600 MHz to 800 MHz region. This amplifier is particularly notable for its excellent DC performance, high open-loop gain, and low input offset voltage, making it an ideal choice for various high-performance applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Offset Voltage (±5 V) | 0.5 | 1 | 1 | mV |
| Input Offset Voltage (±15 V) | 0.5 | 1 | 1 | mV |
| Input Bias Current (±5 V, ±15 V) | 3.3 | 6.6 | 6.6 | µA |
| Input Offset Current (±5 V, ±15 V) | 50 | 300 | 300 | nA |
| Open-Loop Gain (VOUT = ±2.5 V, RLOAD = 500 Ω) | 2 | 3.5 | 3.5 | V/mV |
| Unity Gain Bandwidth (±5 V) | 35 | 35 | MHz | |
| Unity Gain Bandwidth (±15 V) | 50 | 50 | MHz | |
| Full Power Bandwidth (±5 V, 5 V p-p with ±5 V supplies) | 12.7 | MHz | ||
| Supply Voltage | ±5 V, ±15 V | V | ||
| Quiescent Current | 6.4 | 20 | mA |
Key Features
- High-speed operation with a unity gain bandwidth of up to 50 MHz and a full-power bandwidth of 12.7 MHz (5 V p-p with ±5 V supplies).
- Low input offset voltage of 0.5 mV and low input bias current of 3.3 µA, ensuring excellent DC performance.
- High open-loop gain of 3500 V/V, making it suitable for high-gain applications.
- Low power consumption with a quiescent current of 6.4 mA, making it energy-efficient.
- Available in various packages including SOIC, DIP, and Cerdip, offering flexibility in design.
- Operates over a wide supply voltage range of ±5 V and ±15 V, enhancing its versatility).
Applications
- Video instrumentation and imaging equipment
- Copiers, fax machines, scanners, and cameras
- High-speed cable drivers
- High-speed DAC and flash ADC buffers
- General-purpose amplification in high-performance systems).
Q & A
- What is the unity gain bandwidth of the AD847?
The AD847 has a unity gain bandwidth of up to 50 MHz for ±15 V supplies and 35 MHz for ±5 V supplies.
- What is the input offset voltage of the AD847?
The input offset voltage of the AD847 is 0.5 mV for both ±5 V and ±15 V supplies.
- What is the quiescent current of the AD847?
The quiescent current of the AD847 is typically 6.4 mA.
- In what packages is the AD847 available?
The AD847 is available in various packages including SOIC, DIP, and Cerdip.
- What are some typical applications of the AD847?
The AD847 is commonly used in video instrumentation, imaging equipment, copiers, fax machines, scanners, cameras, high-speed cable drivers, and as buffers for high-speed DAC and flash ADC.
- What is the full power bandwidth of the AD847?
The full power bandwidth of the AD847 is 12.7 MHz for a 5 V p-p output with ±5 V supplies.
- How does the AD847 handle input transient or continuous overload voltages?
The AD847 requires an input resistor to protect the input transistors from transient or continuous overload voltages exceeding the ±6 V maximum differential limit.
- What is the open-loop gain of the AD847?
The open-loop gain of the AD847 is 3500 V/V.
- Can the AD847 be used as a buffer for flash A/D converters?
Yes, the AD847 is outstanding as an input buffer for flash A/D converters due to its high-speed performance.
- What is the supply voltage range for the AD847?
The AD847 operates over a supply voltage range of ±5 V and ±15 V.
