Features and Benefits
- Low Frequency to 750MHz (-3dB bandwidth)
- Output 1dB Compression Point +15.8dBm (70MHz)
- Noise Figure 7dB
- Single Supply 3V to 5V with Power Down
- Fully Differential input and outputs
- Three Wire Serial Digital Interface
- Two Pin Selectable Gain Ranges,
Low Range –11dB to +17dB
High Range +6dB to +34dB
- Output Third Order Interface
The AD8370 is a high performance, digitally controlled variable gain amplifier, designed to be used at IF frequencies within communication infrastructure equipment.
The part provides two gain control ranges that are controlled through a three wire digital interface, and allow the user to attain fine gain control for maximum receiver sensitivity.
The AD8370 has been fully specified for operation at common wireless IF frequencies 70 / 140 / 190 / 240 / 380MHz. The high output compression and fine gain control adjustability makes the AD8370 an ideal choice for to be used within digital receiver AGC circuits for GSM / CDMA2000 / W-CDMA cellular base stations.
The AD8370 is fabricated on an advanced silicon bipolar process, operating on a single 3 or 5 volt supply, packaged in space saving 16-lead thin shrunk small outline (TSSOP) package and fully specified over the –40 to +85 C temperature range.Availability
Samples AD8370ARU and an evaluation boards AD8370-EVAL are available.
Other Wireless VGA products:
AD8367 - 45dB, 500MHz Single Ended, Analog Controlled VGA
AD8369 – 45dB, 600MHz Differential, 3dB Step Digitally Controlled VGA
Markets & Technology
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)
AD8370-EVALZ is a fully populated, 4-layer, FR4-based evaluation board designed to allow easy evaluation of all features of the AD8370 DVGA. The evaluation board contains bypassable transformers to allow single ended or differential inputs, and a 25 pin D-Sub connector for external digital control of the on chip SPI port. There is a single switch on this eval board which can be used to turn on and off the +5 V applied to the power pins. This evaluation board requires only a single supply within the range of 4.5 V to 5.5 V.
Software & Systems Requirements
Tools & Simulations
Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.
ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
Product Selection Guide (2)
Technical Articles (1)
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.