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AD7685CCPZRL PDF预览

AD7685CCPZRL

更新时间: 2024-10-28 12:33:15
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亚德诺 - ADI /
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28页 484K
描述
16-Bit, 250 kSPS PulSAR ADC in MSOP/QFN

AD7685CCPZRL 数据手册

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16-Bit, 250 kSPS PulSAR  
ADC in MSOP/QFN  
AD7685  
APPLICATION DIAGRAM  
FEATURES  
0.5V TO VDD  
2.5V TO 5V  
16-bit resolution with no missing codes  
Throughput: 250 kSPS  
INL: 0.6 LSB typical, 2 LSB maximum ( 0.003% of FSR)  
SINAD: 93.5 dB @ 20 kHz  
THD: −110 dB @ 20 kHz  
Pseudo differential analog input range  
0 V to VREF with VREF up to VDD  
VIO  
1.8V TO VDD  
REF VDD  
0 TO VREF  
SDI  
SCK  
SDO  
CNV  
IN+  
AD7685  
3- OR 4-WIRE INTERFACE  
(SPI, DAISY CHAIN, CS)  
IN–  
GND  
No pipeline delay  
Single-supply operation 2.3 V to 5.5 V with  
1.8 V to 5 V logic interface  
Serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible  
Daisy-chain multiple ADCs, BUSY indicator  
Power dissipation  
1.4 μW @ 2.5 V/100 SPS  
1.35 mW @ 2.5 V/100 kSPS, 4 mW @ 5 V/100 kSPS  
Standby current: 1 nA  
Figure 2.  
Table 1. MSOP, QFN (LFCSP)/SOT-23  
14-/16-/18-Bit PulSAR ADC  
400 kSPS  
to  
500 kSPS kSPS  
100  
kSPS  
250  
1000  
ADC  
Driver  
Type  
kSPS  
18-Bit True  
Differential  
16-Bit True  
Differential  
AD7691 AD7690  
AD7982  
AD7982 ADA4941  
ADA4841  
10-lead package: MSOP (MSOP-8 size) and  
3 mm × 3 mm QFN (LFCSP) (SOT-23 size)  
Pin-for-pin-compatible with 10-lead MSOP/QFN PulSAR® ADCs  
AD7684 AD7687 AD7688  
AD7693  
ADA4941  
ADA4841  
16-Bit Pseudo AD7680 AD7685 AD7686  
Differential AD7683 AD7694  
AD7980 ADA4841  
APPLICATIONS  
14-Bit Pseudo AD7940 AD7942 AD7946  
Differential  
ADA4841  
Battery-powered equipment  
Medical instruments  
Mobile communications  
Personal digital assistants (PDAs)  
Data acquisition  
GENERAL DESCRIPTION  
The AD7685 is a 16-bit, charge redistribution successive  
Instrumentation  
Process controls  
approximation, analog-to-digital converter (ADC) that operates  
from a single power supply, VDD, between 2.3 V to 5.5 V. It  
contains a low power, high speed, 16-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.  
2.0  
POSITIVE INL = +0.33LSB  
NEGATIVE INL = –0.50LSB  
1.5  
1.0  
0.5  
0
Power dissipation scales linearly with throughput.  
–0.5  
–1.0  
–1.5  
–2.0  
The SPI-compatible serial interface also features the ability,  
using the SDI input, to daisy chain several ADCs on a single  
3-wire bus or 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.  
0
16384  
32768  
CODE  
49152  
65536  
The AD7685 is housed in a 10-lead MSOP or a 10-lead QFN  
(LFCSP) with operation specified from −40°C to +85°C.  
Figure 1. Integral Nonlinearity vs. Code.  
Rev. C  
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  
www.analog.com  
Fax: 781.461.3113 ©2004–2011 Analog Devices, Inc. All rights reserved.  
 

AD7685CCPZRL 替代型号

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