Features and Benefits
- Low power: 180 μA typical
- Low distortion: 0.003% THD + N
- Low noise: 16 nV/√Hz typical
- 3.6 MHz bandwidth
- Offset voltage: 500 μV typical
- Low offset voltage drift: 4 μV/°C maximum
- Very low input bias currents:
0.5 pA typical
- 2.7 V to 5 V single supply or ±1.35 V
to ±2.5 V dual supply
- Available in small 3 mm × 3mm
The ADA4691-4 is a quad rail-to-rail output, single-supply amplifier featuring low power, wide bandwidth, and low noise. The ADA4691-4 has two independent shutdown pins, allowing further reduction in supply current. These amplifiers are ideal for a wide variety of applications. Audio preamps, filters, IR/photodiode amplifiers, charge amps, and high impedance sensors all benefit from this combination of performance features. The ADA4692-4 is a quad version without shutdown in a 14-lead TSSOP package.
Applications for these amplifiers include consumer audio personal players with low noise and low distortion that provide enough gain and slew rate response over the audio band at low power. Industrial applications with high impedance sensors, such as pyroelectric sensors and other IR sensors, benefit from the high impedance input, low offset drift, and enough band-width and response for low gain applications.
The ADA4691-4 is specified over the extended industrial temperature range (−40°C to +125°C). The ADA4691-4 is available in a 16-lead LFCSP packages.
- Photodiode amplifier
- Sensor amplifier
- Portable instrumentation
- Portable medical devices
- Portable audio: MP3, PDA, smart phone, notebook
- Headphone speaker driver
- Low-side current sense
- ADC driver
- Active filter
- Automotive sensors
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The Universal Precision Op Amp Evaluation Boards has been designed and optimized for many circuit configurations allowing the users to best suit their applications. These boards are all RoHs Compliant. See references below on what board to order by lead count and package.
- EVAL-PRAOPAMP-4RUZ (Quad 14-Lead TSSOP) RU-14
- EVAL-PRAOPAMP-4RZ (Quad 14-Lead SOIC) R-14
Tools & Simulations
Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.