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| 型号： | AD7946 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | 14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN |
| 中文描述： | 14位，500 kSPS的PulSAR系列⑩模数转换器，采用MSOP / QFN封装 |
| 文件页数： | 1/27页 |
| 文件大小： | 301K |
| 代理商： | AD7946 |
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14-Bit, 500 kSPS PulSAR
ADC in MSOP/QFN
Preliminary Technical Data
AD7946
Rev Pr 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
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
FEATURES
14-bit resolution with no missing codes
Throughput: 500 kSPS
INL: ±0.4 LSB typ, ±1 LSB max (±0.0061 % of FSR)
S/(N + D): 85 dB @ 20 kHz
THD: 100 dB @ 20 kHz
Pseudo-differential analog input range
0 V to VREF with VREF up to VDD
No pipeline delay
Single-supply 5V operation with
1.8 V/2.5 V/3 V/5 V logic interface
Serial interface SPI/QSPI/Wire/DSP compatible
Daisy chain multiple ADCs and BUSY indicator
Power dissipation
3.3 mW @ 5 V/100 kSPS,
3.3 W @ 5 V/100 SPS
Stand-by current: 1 nA
10-lead package: MSOP (MSOP-8 size) and
QFN (LFCSP), 3 mm × 3 mm same space as SOT-23
Pin-for-pin compatible with the 16-Bit AD7686
APPLICATIONS
Battery-powered equipment
Data acquisition
Instrumentation
Medical instruments
Process control
Table 1. MSOP, QFN (LFCSP)/SOT-23 14 and16-Bit ADC
Type
100 kSPS
250 kSPS
500 kSPS
16-Bit True
Differential
AD7684
AD7687
AD7688
16-Bit Pseudo
Differential/Unipolar
AD7683
AD7685
AD7694
AD7686
16-Bit Unipolar
AD7680
14-Bit Pseudo
Differential/Unipolar
AD7942
AD7946
14-Bit Unipolar
AD7940
APPLICATION DIAGRAM
AD7946
REF
GND
VDD
IN+
IN–
VIO
SDI
SCK
SDO
CNV
1.8 TO VDD
3- OR 4-WIRE INTERFACE
(SPI, DAISY CHAIN, CS)
0.5 TO 5V
5V
0 TO VREF
Figure 1.
GENERAL DESCRIPTION
The AD7946 is a 14-bit, charge redistribution successive
approximation, analog-to-digital converter (ADC) that operates
from a single 5V power supply, VDD. It contains a low power,
high speed, 14-bit sampling ADC with no missing codes, an
internal conversion clock, and a versatile serial interface port.
The part also contains a low noise, wide bandwidth, short
aperture delay track-and-hold circuit. On the CNV rising edge,
it samples an analog input IN+ between 0 V to REF with respect
to a ground sense IN. The reference voltage, REF, is applied
externally and can be set up to the supply voltage.
Its power scales linearly with throughput.
The SPI compatible serial interface also features the ability,
using the SDI input, to daisy chain several ADCs on a single 3-
wire bus and provides an optional BUSY indicator. It is
compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate
supply VIO.
The AD7946 is housed in a 10-lead MSOP or a 10-lead QFN
(LFCSP) with operation specified from 40°C to +85°C.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD79461 | 制造商:AD 制造商全称:Analog Devices 功能描述:18-Bit, 2 MSPS PulSAR 15 mW ADC in LFCSP (QFN) |
| AD7946BCP | 制造商:Analog Devices 功能描述:ADC SGL SAR 500KSPS 14BIT SERL 10LFCSP EP - Bulk |
| AD7946BCPRL7 | 制造商:AD 制造商全称:Analog Devices 功能描述:14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN |
| AD7946BCPWP | 制造商:AD 制造商全称:Analog Devices 功能描述:14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN |
| AD7946BCPZRL | 功能描述:IC ADC 14BIT 500KSPS 10-LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
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