Datasheet > AD6644ASTZ-65

AD6644ASTZ-65

更新时间： 2024-01-26 21:01:53

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
25页	738K
描述
Analog-to-Digital Converter

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AD6644ASTZ-65 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QFP
包装说明：	LQFP,	针数：	52
Reach Compliance Code：	unknown	风险等级：	5.41
最大模拟输入电压：	2.2 V	最小模拟输入电压：
转换器类型：	ADC, PROPRIETARY METHOD	JESD-30 代码：	S-PQFP-G52
JESD-609代码：	e3	长度：	10 mm
最大线性误差 (EL)：	0.0031%	湿度敏感等级：	3
模拟输入通道数量：	1	位数：	14
功能数量：	1	端子数量：	52
最高工作温度：	85 °C	最低工作温度：	-25 °C
输出位码：	2'S COMPLEMENT BINARY	输出格式：	PARALLEL, WORD
封装主体材料：	PLASTIC/EPOXY	封装代码：	LQFP
封装形状：	SQUARE	封装形式：	FLATPACK, LOW PROFILE
峰值回流温度（摄氏度）：	260	采样速率：	65 MHz
采样并保持/跟踪并保持：	TRACK	座面最大高度：	1.6 mm
标称供电电压：	5 V	表面贴装：	YES
技术：	BIPOLAR	温度等级：	OTHER
端子面层：	MATTE TIN	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	40	宽度：	10 mm
Base Number Matches：	1

AD6644ASTZ-65 数据手册

14-Bit, 40 MSPS/65 MSPS

Analog-to-Digital Converter

AD6644

Designed for multichannel, multimode receivers, the AD6644

is part of the Analog Devices, Inc. new SoftCell® transceiver

chipset. The AD6644 achieves 100 dB multitone, spurious-free

dynamic range (SFDR) through the Nyquist band. This break-

through performance eases the burden placed on multimode

digital receivers (software radios) which are typically limited by

the ADC. Noise performance is exceptional; typical signal-to-

noise ratio is 74 dB.

FEATURES

65 MSPS guaranteed sample rate

40 MSPS version available

Sampling jitter < 300 fs

100 dB multitone SFDR

1.3 W power dissipation

Differential analog inputs

Pin compatible to AD6645

Twos complement digital output format

3.3 V CMOS compatible

The AD6644 is also useful in single channel digital receivers

designed for use in wide-channel bandwidth systems (CDMA,

WCDMA). With oversampling, harmonics can be placed

outside the analysis bandwidth. Oversampling also facilitates

the use of decimation receivers (such as the AD6620), allowing

the noise floor in the analysis bandwidth to be reduced. By

replacing traditional analog filters with predictable digital

components, modern receivers can be built using fewer RF

components, resulting in decreased manufacturing costs, higher

manufacturing yields, and improved reliability.

Data-ready for output latching

APPLICATIONS

Multichannel, multimode receivers

AMPS, IS-136, CDMA, GSM, WCDMA

Single channel digital receivers

Antenna array processing

Communications instrumentation

Radar, infrared imaging

Instrumentation

The AD6644 is built on the Analog Devices high speed

complementary bipolar process (XFCB) and uses an innovative,

multipass circuit architecture. Units are packaged in a 52-lead

plastic low profile quad flat package (LQFP) specified from –

25°C to +85°C.

GENERAL DESCRIPTION

PRODUCT HIGHLIGHTS

The AD6644 is a high speed, high performance, monolithic 14-bit

analog-to-digital converter (ADC). All necessary functions,

including track-and-hold (TH) and reference, are included on-

chip to provide a complete conversion solution. The AD6644

provides CMOS-compatible digital outputs. It is the third

generation in a wideband ADC family, preceded by the AD9042

(12-bit 41 MSPS) and the AD6640 (12-bit 65 MSPS, IF

sampling).

1. Guaranteed sample rate is 65 MSPS.

2. Fully differential analog input stage.

3. Digital outputs can be run on 3.3 V supply for easy interface

to digital ASICs.

4. Complete solution: reference and track-and-hold.

5. Packaged in small, surface-mount, plastic, 52-lead LQFP.

FUNCTIONAL BLOCK DIAGRAM

AIN

TH1

TH2

TH3

TH4

TH5

ADC3

ADC1

DAC1

ADC2

DAC2

AD6644

2.4V

REF

ENCODE

INTERNAL

TIMING

DIGITAL ERROR CORRECTION LOGIC

GND

DMID OVR DRY D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1

(MSB)

(LSB)

Figure 1.

Rev. D

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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