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| 型号： | EVAL-AD7764EDZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/33页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL AD7764 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 312k |
| 数据接口： | 串行 |
| 输入范围： | ±3.2768 V |
| 在以下条件下的电源（标准）： | 300mW @ 312kSPS |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7764 |
| 已供物品： | 板，CD |
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24-Bit, 312 kSPS, 109 dB Sigma-Delta ADC
with On-Chip Buffers and Serial Interface
AD7764
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2007-2009 Analog Devices, Inc. All rights reserved.
FEATURES
High performance 24-bit ∑- ADC
115 dB dynamic range at 78 kHz output data rate
109 dB dynamic range at 312 kHz output data rate
312 kHz maximum fully filtered output word rate
Pin-selectable oversampling rate (64×, 128×, and 256×)
Low power mode
Flexible SPI
Fully differential modulator input
On-chip differential amplifier for signal buffering
On-chip reference buffer
Full band low-pass finite impulse response (FIR) filter
Overrange alert pin
Digital gain correction registers
Power-down mode
Synchronization of multiple devices via SYNC pin
Daisy chaining
APPLICATIONS
Data acquisition systems
Vibration analysis
Instrumentation
FUNCTIONAL BLOCK DIAGRAM
REFGND
VREF+
BUF
VOUTA– VOUTA+ VIN+ VIN–
GND
MCLK
OVERRANGE
DEC_RATE
AVDD1
AVDD2
AVDD3
AVDD4
DVDD
RBIAS
SYNC
RESET/PWRDWN
VINA+
VINA–
FSO SCO SDI SDO FSI
DIFF
MULTIBIT
Σ-Δ
MODULATOR
RECONSTRUCTION
DECIMATION
FIR FILTER ENGINE
AD7764
INTERFACE LOGIC AND
OFFSET AND GAIN
CORRECTION REGISTERS
065
18-
001
Figure 1.
Table 1. Related Devices
Part No.
Description
AD7760
2.5 MSPS, 100 dB, parallel output on-chip buffers
AD7762
625 kSPS, 109 dB, parallel output on-chip buffers
AD7763
625 kSPS, 109 dB, serial output, on-chip buffers
AD7765
156 kSPS, 112 dB, serial output, on-chip buffers
AD7766
128/64/32 kSPS, 8.5 mW, 109 dB SNR
AD7767
128/64/32 kSPS, 8.5 mW, 109 dB SNR
GENERAL DESCRIPTION
The AD7764 is a high performance, 24-bit sigma-delta (Σ-Δ)
analog-to-digital converter (ADC). It combines wide input
bandwidth, high speed, and performance of 109 dB dynamic
range at a 312 kHz output data rate. With excellent dc
specifications, the converter is ideal for high speed data
acquisition of ac signals where dc data is also required.
Using the AD7764 eases the front-end antialias filtering
requirements, simplifying the design process significantly. The
AD7764 offers pin-selectable decimation rates of 64×, 128×,
and 256×. Other features include an integrated buffer to drive
the reference, as well as a fully differential amplifier to buffer
and level shift the input to the modulator.
An overrange alert pin indicates when an input signal has
exceeded the acceptable range. The addition of internal gain
and internal overrange registers makes the AD7764 a compact,
highly integrated data acquisition device requiring minimal
peripheral components.
The AD7764 also offers a low power mode, significantly
reducing power dissipation without reducing the output data
rate or available input bandwidth.
The differential input is sampled at up to 40 MSPS by an analog
modulator. The modulator output is processed by a series of
low-pass filters. The external clock frequency applied to the
AD7764 determines the sample rate, filter corner frequencies,
and output word rate.
The AD7764 device boasts a full band on-board FIR filter. The
full stop-band attenuation of the filter is achieved at the Nyquist
frequency. This feature offers increased protection from signals
that lie above the Nyquist frequency being aliased back into the
input signal bandwidth.
The reference voltage supplied to the AD7764 determines the
input range. With a 4 V reference, the analog input range is
±3.2768 V differential, biased around a common mode of
2.048 V. This common-mode biasing can be achieved using
the on-chip differential amplifier, further reducing the external
signal conditioning requirements.
The AD7764 is available in a 28-lead TSSOP package and is
specified over the industrial temperature range of 40°C
to +85°C.
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| EVAL-AD7765EBZ | 制造商:Analog Devices 功能描述:EVAL BOARD 24BIT, 312KSPS, 109DB - Bulk |
| EVAL-AD7765EDZ | 功能描述:BOARD EVAL AD7765 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| EVAL-AD7766-1EDZ | 功能描述:BOARD EVAL AD7766-1 64KSPS 111DB RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| EVAL-AD7766-2EDZ | 功能描述:BOARD EVAL AD7766-2 32KSPS 114DB RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| EVAL-AD7766EDZ | 功能描述:BOARD EVAL AD7766 128KSPS 108DB RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
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