ADA4930-2 Ultralow Noise Drivers for Low Voltage ADCs

The ADA4930-1/ADA4930-2 are very low noise, low distortion, high speed differential amplifiers. They are an ideal choice for driving 1.8 V high performance ADCs with resolutions up to 14 bits from dc to 70 MHz. The adjustable output common mode allows the ADA4930-1/ADA4930-2 to match the input of the ADC. The internal common-mode feedback loop provides exceptional output balance, suppression of even-order harmonic distortion products, and dc level translation.

With the ADA4930-1/ADA4930-2, differential gain configurations are easily realized with a simple external feedback network of four resistors determining the closed-loop gain of the amplifier.

The ADA4930-1/ADA4930-2 are fabricated using Analog Devices, Inc., proprietary silicon-germanium (SiGe), complementary bipolar process, enabling them to achieve very low levels of distortion with an input voltage noise of only 1.2 nV/√Hz.

The low dc offset and excellent dynamic performance of the ADA4930-1/ADA4930-2 make them well suited for a wide variety of data acquisition and signal processing applications. The ADA4930-1 is available in a Pb-free, 3 mm × 3 mm 16-lead LFCSP, and the ADA4930-2 is available in a Pb-free, 4 mm × 4 mm 24-lead LFCSP. The pinout has been optimized to facilitate printed circuit board (PCB) layout and minimize distortion. The ADA4930-1 is specified to operate over the −40°C to +105°C temperature range, and the ADA4930-2 is specified to operate over the −40°C to +105°C temperature range for 3.3 V or 5 V supply voltages.

Applications

Features and Benefits
  • Low input voltage noise: 1.2 nV/√Hz
  • Low common-mode output: 0.9 V on single supply
  • Extremely low harmonic distortion
    −104 dBc HD2 at 10 MHz
    −79 dBc HD2 at 70 MHz
    −73 dBc HD2 at 100 MHz
    −101 dBc HD3 at 10 MHz
    −82 dBc HD3 at 70 MHz
    −75 dBc HD3 at 100 MHz
  • High speed
    −3 dB bandwidth of 1.35 GHz, G = 1
    Slew rate: 3400 V/μs, 25% to 75%
    0.1 dB gain flatness to 380 MHz
    Fast overdrive recovery of 1.5 ns
  • 0.5 mV typical offset voltage
  • Externally adjustable gain
  • Differential-to-differential or single-ended-to-differential operation
  • See data sheet for additional features
    • Amplifiers
    Aerospace and Defense
    • Solutions
    Instrumentation and Measurement
    • Electronic Test & Measurement
    SPICE Models
    Reference Designs
    Data Sheets
    Documentnote
    ADA4930-1/ADA4930-2: Ultralow Noise Drivers for Low Voltage ADCs Data Sheet (Rev. B)PDF 750.64 K
    Application Notes
    Documentnote
    AN-1363: Meeting Biasing Requirements of Externally Biased RF/Microwave Amplifiers with Active Bias Controllers (Rev. 0)PDF 804.11 K
    AN-0992: Active Filter Evaluation Board for Differential Amplifiers (Rev. 0)PDF 85 kB
    AN-1026: High Speed Differential ADC Driver Design Considerations (Rev. A)PDF 355 kB
    AN-584: Using the AD813X Differential Amplifier (Rev. 0)PDF 174 kB
    AN-589: Ways to Optimize the Performance of a Difference Amplifier (Rev. B)PDF 115 kB
    User Guides
    Documentnote
    UG-018: Evaluation Board for Dual High Speed Differential AmplifiersPDF 314 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    ADA4930-2YCPZ-R2 Production24 ld LFCSP (4x5mm w/2.30mm EP)REEL 250-40 to 105C8.480Y
    ADA4930-2YCPZ-R7 Production24 ld LFCSP (4x5mm w/2.30mm EP)REEL 1500-40 to 105C7.216.29Y
    ADA4930-2YCPZ-RL Production24 ld LFCSP (4x5mm w/2.30mm EP)REEL 5000-40 to 105C06.29Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    EVAL-FDA-2CPZ-24Evaluation Bare Board for 24 Lead LFCSP18.25Y
    Reference Materials
    ADA4930-1/ADA4930-2: Ultralow Noise Drivers for Low Voltage ADCs Data Sheet (Rev. B) ada4930-1
    ADA4930-1/ADA4930-2：超低噪声驱动器，适用于低压ADC (Rev. A) ada4930-1
    ADA4930 SPICE Macro Model ada4930-1
    CN0252 设计和集成文件 ada4930-1
    AN-1363: 利用有源偏置控制器满足外部偏置射频/微波放大器的偏置要求 (Rev. 0) hmc8120
    AN-1363: Meeting Biasing Requirements of Externally Biased RF/Microwave Amplifiers with Active Bias Controllers (Rev. 0) hmc8120
    AN-0992: Active Filter Evaluation Board for Differential Amplifiers (Rev. 0) ad8138
    AN-1026: High Speed Differential ADC Driver Design Considerations (Rev. A) ad8351
    AN-1026: 高速差分ADC驱动器设计考虑[中文版] (Rev. 0) ad8351
    AN-589: 差动放大器性能优化方法 (Rev. 0) ad8350
    AN-584: AD813x的运用 (Rev. 0) ad8138
    AN-0992: 用于差分放大器的有源滤波器评估板 (Rev. 0) ad8138
    AN-584: Using the AD813X Differential Amplifier (Rev. 0) ad8138
    AN-589: Ways to Optimize the Performance of a Difference Amplifier (Rev. B) ad8350
    UG-018: Evaluation Board for Dual High Speed Differential Amplifiers ada4937-2
    MT-218: 多反馈带通滤波器设计示例 ad8138
    MT-076：差分驱动器分析 ad8138
    MT-075: Differential Drivers for High Speed ADCs Overview ad6672
    CN0252: Single-Supply DC-Coupled 16-Bit, 125 MSPS Analog Front End for... ada4930-1
    Designing 1-ppm DAC Accuracy into Instrumentation Applications - Part 2 ada4937-1
    Designing 1-ppm DAC Accuracy into Instrumentation Applications - Part 1 ada4937-1
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