The MAX109, 2.2Gsps, 8-bit, analog-to-digital converter
(ADC) enables the accurate digitizing of analog signals
with frequencies up to 2.5GHz. Fabricated on an
advanced SiGe process, the MAX109 integrates a highperformance
track/hold (T/H) amplifier, a quantizer, and
a 1:4 demultiplexer on a single monolithic die. The
MAX109 also features adjustable offset, full-scale voltage
(via REFIN), and sampling instance allowing multiple
ADCs to be interleaved in time.
The innovative design of the internal T/H amplifier,
which has a wide 2.8GHz full-power bandwidth,
enables a flat-frequency response through the second
Nyquist region. This results in excellent ENOB performance
of 6.9 bits. A fully differential comparator design
and decoding circuitry reduce out-of-sequence code
errors (thermometer bubbles or sparkle codes) and
provide excellent metastability performance (1014 clock
cycles). This design guarantees no missing codes.
The analog input is designed for both differential and
single-ended use with a 500mVP-P input-voltage range.
The output data is in standard LVDS format, and is
demultiplexed by an internal 1:4 demultiplexer. The
LVDS outputs operate from a supply-voltage range of
3V to 3.6V for compatibility with single 3V-reference
systems. Control inputs are provided for interleaving
additional MAX109 devices to increase the effective
system-sampling rate.
The MAX109 is offered in a 256-pin Super Ball-Grid Array
(SBGA) package and is specified over the extended
industrial temperature range (-40°C to +85°C).
Applications
Radar Warning Receivers (RWR)
Light Detection and Ranging (LIDAR)
Digital RF/IF Signal Processing
Electronic Warfare (EW) Systems
High-Speed Data-Acquisition Systems
Digital Oscilloscopes
High-Energy Physics Instrumentation
ATE Systems

MAX109 2.2Gsps、8位、模數(shù)轉(zhuǎn)換器(ADC)可將頻率高達(dá)2.5GHz的模擬信號(hào)精確數(shù)字化。MAX109采用先進(jìn)的SiGe工藝制造，在單芯片上集成采樣/保持(T/H)放大器、量化器和1:4解復(fù)用器。MAX109還提供可調(diào)整的失調(diào)、滿偏電壓(通過(guò)REFIN)以及采樣位置，可實(shí)現(xiàn)多個(gè)ADC交錯(cuò)工作。

內(nèi)部采樣/保持放大器采用創(chuàng)新性的設(shè)計(jì)，具有極寬的2.8GHz全功率帶寬，從而在整個(gè)第二奈奎斯特區(qū)域內(nèi)具有平坦的頻率響應(yīng)。這樣便保證具有6.9位ENOB的優(yōu)異性能。全差分比較器設(shè)計(jì)和可降低序列外誤碼電路(溫度計(jì)泡沫或閃爍碼)并提供優(yōu)異的亞穩(wěn)態(tài)性能(10¹⁴時(shí)鐘周期)。這種設(shè)計(jì)可以保證無(wú)誤碼。

則 模擬輸入具有差分和單端兩種模式，具有500mV_P-P輸入電壓范圍。輸出數(shù)據(jù)為標(biāo)準(zhǔn)LVDS格式，由內(nèi)部1:4解復(fù)用器解復(fù)用。LVDS輸出的工作電壓范圍為3V至3.6V，兼容3V基準(zhǔn)單電源系統(tǒng)。器件還提供控制輸入以控制其他MAX109交錯(cuò)工作，從而提高系統(tǒng)的有效采樣速率。

MAX109采用256引腳超級(jí)球柵陣列(SBGA)封裝，額定工作于擴(kuò)展工業(yè)級(jí)溫度范圍(-40°C至+85°C)。