TI Korea (CEO Kent Jeon, www.ti.com/ww/kr ) September 24, 2012 – TI (CEO Kent Jeon) announced the launch of the world's first Programmable Differential Amplifier (PDA). The 2.4GHz single-channel LMH6881 PDA and the 2.4GHz dual-channel LMH6882 PDA simplify differential amplifier design by providing optimized noise, distortion, and bandwidth performance across a gain range of 6dB to 26dB. System design using PDAs can enhance flexibility for various applications, reduce design time and solution size, and significantly lower Bill of Materials (BOM) costs. (For more product details and ordering information, please refer to www.ti.com/lmh688x-pr )

The PDA combines the advantages of the Fully-Differential Amplifier (FDA) and the Digital Variable Gain Amplifier (DVGA). Using the PDA facilitates design modifications by allowing gain changes without the need for separate external register adjustments, amplifier replacement, or the reconfiguration and optimization of individual gain stages. Compared to conventional DVGAs, TI's PDA provides more consistent noise and distortion performance across the entire gain range. The LMH6881 and LMH6882, which utilize programmable gain control, do not require gain setting registers and prevent the associated inconsistency errors. When used in the design of applications such as medical, test and instrumentation, military, wireless communications, and microwave backhaul, more robust systems can be achieved. (Related video: Watch at www.ti.com/lmh6881v-pr )

Key Features and Advantages of LMH6881 and LMH6882
• Optimized Performance: These devices maintain excellent noise and distortion performance across the entire gain range, providing a 9.7dB noise figure at maximum gain (26dB) and a 100MHz input frequency, 44dBm OIP3, and -100dBc HD3.
• Ease of Use: No external registers required for gain control via SPI bus or dedicated pins.
• Maximum Flexibility: Support for DC/AC coupling and single-ended to differential conversion eliminates the need for balloon components, providing designers with the flexibility to operate from DC to high frequencies with minimal external components.
• Dual Channel Gain / Phase Matching: The LMH6882 provides excellent image rejection performance for broadband zero IF and I/Q sampling applications with 0.2dB channel gain matching and 1.5° phase matching capabilities.
• High-performance ADC driving: Driving high-speed analog-to-digital converters (ADCs) such as the 8-bit single-channel ADC 083000, 10-bit dual-channel ADC 10D1500, 12-bit dual-channel ADC 12D1800RF, and 14-bit single-channel ADS4149.

Tools and Support
TI provides various tools and support to accelerate design time using LMH6881 and LMH6882 PDAs. TINA-TI provides SPICE models and reference designs along with an Evaluation Module (EVM), which can be utilized to rapidly evaluate these devices and reduce system development time.

LMH6881
• TINA-TI SPICE Model: www.ti.com/lmh6881spice-pr
• LMH6881EVAL EVM, Reference Price $149: www.ti.com/lmh6881evm-pr
• Reference design: www.ti.com/lmh6881ref-pr

LMH6882
• TINA-TI SPICE Model: http://www.ti.com/lmh6882spice-pr
• LMH6882EVAL EVM, Reference Price $199: www.ti.com/lmh6882evm-pr
• Reference design: www.ti.com/lmh6882ref-pr

Engineers using the LMH6881 and LMH6882 can ask questions and receive advice from TI experts through the High Speed Amplifiers Forum, a TI E2E™ community. It is possible.

Supply timing, packaging, and price
The LMH6881 single-channel PDA is currently available in a 24-pin, 2.6mm x 2.6mm QFN package at a price of $3.71 per unit in a quantity of 1,000. The LMH6882 dual-channel PDA is currently available in a 36-pin, 4.6mm x 4.6mm QFN package at a price of $5.95 per unit in a quantity of 1,000.