LM97937数据手册集成电路（IC）的模数转换器（ADC）规格书PDF

描述 Description

The LM97937 device is a dual-channel 370 MSPS analog-to-digital converter (ADC) with JESD204B interface operating up to 7.4 Gb/s. SNRBoost technology with bandpass spectral shaping improves the noise density at the intermediate frequency and Bit-Burst technology provides temporary and periodic resolution enhancement. The integrated input buffer reduces charge kick-back noise and eases the system level design of the driving amplifier, anti-aliasing filter and impedance matching. An input sampling clock divider provides integer divide ratios with configurable phase selection to simplify system clocking. The device comes in a 56-pin, 8-mm × 8-mm QFN package.

特性 Features

• Conversion Rate: 370 MSPS
• 1.7 VP-P Input Full Scale Range
• SNRBoost Noise Shaping with 100 MHz Bandpass Bandwidth
• Noise Spectral Density: –152.0 dBFS/Hz
• Programmable Passband Center Frequency

• Bit-Burst Resolution Switching
• Resolutions: 9-bit (Low-Res), 14-bit (Hi-Res)
• Hi-Res Noise Density: –152.7 dBFS/Hz
• Programmable Burst Configurations

• Performance
• Input: 150 MHz, –3 dBFS
• SNR (SNRBoost): 71.6 dBFS
• SNR (Bit-Burst): 69.6 dBFS
• SFDR: 88 dBFS
• non-HD2/HD3 SPUR: –90 dBFS


• Power Dissipation: 876 mW/channel
• Buffered Analog Inputs
• On-chip Precision Reference Without External Bypassing
• Input Sampling Clock Divider with Phase Synchronization (Divide-by- 1, 2, 4 or 8)
• JESD204B Subclass 1 Serial Data Interface
• Lane Rates up to 7.4 Gb/s
• Configurable as 1- or 2-lanes/channel

• Fast Over-range Signals
• 4-wire, 1.2 V, 1.8 V, 2.5V or 3.3V Compatible SPI
• 56-pin QFN Package, (8 × 8 mm, 0.5mm pin-pitch)