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AD7690BRMZ

更新时间： 2024-09-16 12:52:39
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24页 620K
描述
18-Bit, 1.5 LSB INL, 400 kSPS PulSAR® Differential ADC in MSOP/QFN

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AD7690BRMZ 数据手册

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18-Bit, 1.5 LSB INL, 400 kSPS PulSAR®  
Differential ADC in MSOP/QFN  
AD7690  
APPLICATION EXAMPLE  
FEATURES  
+2.5V TO +5V  
+5V  
18-bit resolution with no missing codes  
Throughput: 400 kSPS  
INL: 0.7ꢀ LSB typ, 1.ꢀ LSB max ( 6 ppm of FSR)  
Dynamic range: 102 dB @ 400 kSPS  
Oversampled dynamic range: 12ꢀ dB @ 1 kSPS  
Noise-free code resolution: 20 bits @ 1 kSPS  
Effective resolution: 22.7 bits @ 1 kSPS  
SINAD: 101.ꢀ dB @ 1 kHz  
VIO  
SDI  
+1.8V TO VDD  
REF VDD  
GND  
IN+  
IN–  
3- OR 4-WIRE  
SCK  
SDO  
CNV  
INTERFACE  
±10V, ±5V, ...  
(SPI, DAISY CHAIN, CS)  
ADA4941-1  
AD7690  
Figure 2.  
THD: −12ꢀ dB @ 1 kHz  
True differential analog input range: VREF  
0 V to VREF with VREF up to VDD on both inputs  
No pipeline delay  
Single-supply ꢀ V operation with  
1.8 V/2.ꢀ V/3 V/ꢀ V logic interface  
Serial interface, SPI®/QSPI™/MICROWIRE™/DSP compatible  
Daisy-chain multiple ADCs and busy indicator  
Power dissipation  
Table 1. MSOP, QFN (LFCSP)/SOT-23  
14-/16-/18-Bit PulSAR ADC  
400 kSPS  
to  
ꢀ00 kSPS kSPS  
100  
kSPS  
2ꢀ0  
kSPS  
1000  
ADC  
Driver  
Type  
18-Bit True  
Differential  
AD7691 AD7690  
AD7982  
AD7982 ADA4941  
ADA4841  
16-Bit True  
Differential  
AD7684 AD7687 AD7688  
AD7693  
ADA4941  
ADA4841  
4.2ꢀ μW @ 100 SPS  
4.2ꢀ mW @ 100 kSPS  
Standby current: 1 nA  
16-Bit Pseudo AD7680 AD7685 AD7686  
Differential AD7683 AD7694  
AD7980 ADA4841  
10-lead package: MSOP (MSOP-8 size) and  
3 mm × 3 mm QFN (LFCSP) (SOT-23 size)  
Pin-for-pin compatible with QFN/MSOP PulSAR ADCs  
14-Bit Pseudo AD7940 AD7942 AD7946  
Differential  
ADA4841  
GENERAL DESCRIPTION  
APPLICATIONS  
The AD7690 is an 18-bit, successive approximation, analog-to-  
digital converter (ADC) that operates from a single power supply,  
VDD. It contains a low power, high speed, 18-bit sampling ADC  
with no missing codes, an internal conversion clock, and a  
versatile serial interface port. On the CNV rising edge, it  
samples the voltage difference between the IN+ and IN− pins.  
The voltages on these pins swing in opposite phase between 0 V  
and REF. The reference voltage, REF, is applied externally and  
can be set up to the supply voltage.  
Battery-powered equipment  
Data acquisition  
Seismic data acquisition systems  
DVMs  
Instrumentation  
Medical instruments  
1.5  
POSITIVE INL = +0.42LSB  
NEGATIVE INL = –0.6LSB  
1.0  
0.5  
The power of the AD7690 scales linearly with the 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 VIO supply.  
0
–0.5  
–1.0  
–1.5  
The AD7690 is housed in a 10-lead MSOP or a 10-lead QFN  
(LFCSP) with operation specified from −40°C to +85°C.  
0
65536  
131072  
CODE  
196608  
262144  
Figure 1. Integral Nonlinearity vs. Code  
Rev. B  
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 ©2006–2011 Analog Devices, Inc. All rights reserved.  
 
 
 
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AD7690BRMZ 替代型号

型号 品牌 替代类型 描述 数据表
AD7690BRMZ-RL7 ADI

完全替代

 18-Bit, 1.5 LSB INL, 400 kSPS PulSAR® Differential ADC in MSOP/QFN
AD7685BRMZRL7 ADI

类似代替

 16-Bit, 250 kSPS PulSAR ADC in MSOP/QFN
AD7980BRMZ ADI

类似代替

 16-Bit, 1 MSPS PulSAR ADC in MSOP/QFN

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 		250 kSPS PulSAR Differential ADC in MSOP/LFCSP
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AD7691BRMZ ADI

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 		18-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP/QFN
AD7691BRMZ-RL7 ADI

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 		18-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP/QFN
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 		16-Bit, +/-0.65 LSB INL, 500 kSPS PulSAR Differential ADC in MSOP/QFN
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