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| 型号： | AD7707BRU-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/52页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 3CH 20-TSSOP T/R |
| 标准包装： | 1,000 |
| 位数： | 16 |
| 采样率（每秒）： | 500 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 1mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个单端，单极；1 个单端，双极；2 个伪差分，单极；2 个伪差分，双极 |
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3 V/5 V, ±10 V Input Range, 1 mW
3-Channel 16-Bit, Sigma-Delta ADC
AD7707
Rev. B
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
www.analog.com
Fax: 781.461.3113
2000–2010 Analog Devices, Inc. All rights reserved.
FEATURES
Charge balancing ADC
16 bits, no missing codes
±0.003% nonlinearity
High level (±10 V) and low level (±10 mV) input channels
True bipolar ±100 mV capability on low level input
Channels without requiring charge pumps
Programmable gain front end
Gains from 1 to 128
3-wire serial interface
SPI, QSPI, MICROWIRE and DSP compatible
Schmitt trigger input on SCLK
Ability to buffer the analog input
2.7 V to 3.3 V or 4.75 V to 5.25 V operation
Power dissipation 1 mW at 3 V
Standby current 8 μA maximum
20-lead SOIC and TSSOP packages
GENERAL DESCRIPTION
The AD7707 is a complete analog front end for low frequency
measurement applications. This 3-channel device can accept
either low level input signals directly from a transducer or high
level (±10 V) signals and produce a serial digital output. It employs
a Σ-Δ conversion technique to realize up to 16 bits of no missing
codes performance. The selected input signal is applied to a
proprietary programmable gain front end based around an analog
modulator. The modulator output is processed by an on-chip
digital filter. The first notch of this digital filter can be pro-
grammed via an on-chip control register allowing adjustment
of the filter cutoff and output update rate.
The AD7707 operates from a single 2.7 V to 3.3 V or 4.75 V to
5.25 V supply. The AD7707 features two low level pseudo differen-
tial analog input channels, one high level input channel and a
differential reference input. Input signal ranges of 0 mV to 20 mV
through 0 V to 2.5 V can be accommodated on both low level input
channels when operating with a VDD of 5 V and a reference of
2.5 V. They can also handle bipolar input signal ranges of ±20 mV
through ±2.5 V, which are referenced to the LCOM input. The
AD7707, with a 3 V supply and a 1.225 V reference, can handle
unipolar input signal ranges of 0 mV to 10 mV through 0 V to
1.225 V. Its bipolar input signal ranges are ±10 mV through ±1.225 V.
The high level input channel can accept input signal ranges of ±10 V,
±5 V, 0 V to 10 V and 0 V to 5 V. The AD7707 thus performs all
signal conditioning and conversion for a 3-channel system.
The AD7707 is ideal for use in smart, microcontroller or DSP-
based systems. It features a serial interface that can be configured
FUNCTIONAL BLOCK DIAGRAM
DVDD
AVDD
REF IN(–)
REF IN(+)
AD7707
MUX
PGA
CHARGE
BALANCING
A/D CONVERTER
Σ-Δ
MODULATOR
DIGITAL FILTER
A = 1 ≈ 128
SERIAL INTERFACE
REGISTER BANK
CLOCK
GENERATION
MCLK IN
MCLK OUT
AGND
DGND
DRDY
RESET
DIN
DOUT
CS
SCLK
086
91
-00
1
AIN1
AIN2
LOCOM
AIN3
VBIAS
HICOM
5k
15k
30k
BUF
Figure 1.
for 3-wire operation. Gain settings, signal polarity and update
rate selection can be configured in software using the input
serial port. The part contains self-calibration and system calibra-
tion options to eliminate gain and offset errors on the part itself
or in the system.
CMOS construction ensures very low power dissipation, and the
power-down mode reduces the standby power consumption to
20 μW typical. This part is available in a 20-lead wide body (0.3
inch) small outline (SOIC) package and a low profile 20-lead TSSOP.
PRODUCT HIGHLIGHTS
1.
The AD7707 consumes less than 1 mW at 3 V supplies and
1 MHz master clock, making it ideal for use in low power
systems. Standby current is less than 8 μA.
2.
On-chip thin-film resistors allow ±10 V, ±5 V, 0 V to 10 V,
and 0 V to 5 V high level input signals to be directly accom-
modated on the analog inputs without requiring split supplies
or charge-pumps.
3.
The low level input channels allow the AD7707 to accept
input signals directly from a strain gage or transducer
removing a considerable amount of signal conditioning.
4.
The part features excellent static performance specifications
with 16 bits, no missing codes, ±0.003% accuracy, and low
rms noise. Endpoint errors and the effects of temperature
drift are eliminated by on-chip calibration options, which
remove zero-scale and full-scale errors.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7707BRUZ | 功能描述:IC ADC 16BIT 3CH 20-TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7707BRUZ-REEL | 功能描述:IC ADC 16BIT 3CH 20-TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7707BRUZ-REEL7 | 功能描述:IC ADC 16BIT 3CHAN 20TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7707BRZ | 功能描述:IC ADC 16BIT 3CHAN 20SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7707BRZ-REEL | 功能描述:IC ADC 16BIT 3CHAN 20SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
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