|
|
PDF AD7902 Data sheet ( Hoja de datos )
| Número de pieza | AD7902 | |
| Descripción | 1 MSPS PulSAR ADC | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AD7902 (archivo pdf) en la parte inferior de esta página. Total 29 Páginas | ||
|
No Preview Available !
Data Sheet
Dual Pseudo Differential 16-Bit, 1 MSPS
PulSAR ADC 12.0 mW in QSOP
AD7902
FEATURES
GENERAL DESCRIPTION
16-bit resolution with no missing codes
The AD7902 is a dual 16-bit, successive approximation, analog-
Throughput: 1 MSPS
to-digital converter (ADC) that operates from a single power
Low power dissipation
supply, VDDx, per ADC. It contains two low power, high speed,
7.0 mW at 1 MSPS (VDD1 and VDD2 only)
12.0 mW at 1 MSPS (total)
16-bit sampling ADCs and a versatile serial port interface (SPI).
On the CNVx rising edge, the AD7902 samples an analog input,
140 µW at 10 kSPS
INL: ±1.0 LSB typical, ±2.5 LSB maximum
IN+, in the range of 0 V to VREF with respect to a ground sense,
IN−. The externally applied reference voltage of the REFx pins
SINAD: 91 dB at 1 kHz
THD: −105 dB at 1 kHz
Pseudo differential analog input range
0 V to VREF with VREF between 2.4 V to 5.1 V
Allows use of any input range
Easy to drive with the ADA4841-1/ADA4841-2
No pipeline delay
Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic
interface
(VREF) can be set independently from the supply voltage pins,
VDDx. The power of the device scales linearly with throughput.
Using the SDIx inputs, the SPI-compatible serial interface can
also daisy-chain multiple ADCs on a single 3-wire bus and provide
an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V,
or 5 V logic, using the separate VIOx supplies.
The AD7902 is available in a 20-lead QSOP package with
operation specified from −40°C to +125°C.
Serial port interface (SPI) QSPI/MICROWIRE/DSP compatible
20-lead QSOP package
Wide operating temperature range: −40°C to +125°C
Table 1. MSOP 14-/16-/18-Bit PulSAR® ADCs
400 kSPS
Bits 100 kSPS 250 kSPS to 500 kSPS 1000 kSPS ADC Driver
APPLICATIONS
18
AD76911 AD76901
AD79821 ADA4941-1
ADA4841-1
Battery-powered equipment
ADA4841-2
Communications
Automated test equipment (ATE)
Data acquisition
Medical instrumentation
16 AD7680 AD76851 AD76861
AD7683 AD76871 AD76881
AD7684 AD7694 AD76931
14 AD7940 AD79421 AD79461
AD79801
AD7903
AD7902
ADA4941-1
ADA4841-1
ADA4841-2
Redundant measurement
Simultaneous sampling
1 Pin-for-pin compatible.
FUNCTIONAL BLOCK DIAGRAM
REF = 2.5V TO 5V
2.5V
0V TO VREF
0V TO VREF
REF1 REF2 VDD1 VDD2
IN1+
ADC1
IN1–
VIO1
SDI1
SCK1
CNV1
SDO1
IN2+
ADC2
IN2–
VIO2
SDI2
SCK2
CNV2
SDO2
GND AD7902
VIO1/VIO2
SDI1/SDI2
SCK1/SCK2
CNV1/CNV2
SDO1
3-WIRE OR 4-WIRE
INTERFACE
(SPI, CS, AND
CHAIN MODES)
SDO2
Figure 1.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2014–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD7902
Data Sheet
VDD = 2.5 V, VIO = 2.3 V to 5.5 V, TA = −40°C to +125°C, unless otherwise noted.1
Table 3.
Parameter
REFERENCE
Voltage Range
Load Current
SAMPLING DYNAMICS
−3 dB Input Bandwidth
Aperture Delay
Aperture Delay Match
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
IIH
DIGITAL OUTPUTS
Data Format
Pipeline Delay
VOL
VOH
POWER SUPPLIES
VDDx
VIOx
VIOx Range
IVDDx
IVIOx
Standby Current2, 3
Power Dissipation
VDDx Only
REF Only
VIO Only
Energy per Conversion
TEMPERATURE RANGE4
Specified Performance
Test Conditions/Comments
1 MSPS, VREF = 5 V, each ADC
VDD = 2.5 V
VDD = 2.5 V
VIO > 3 V
VIO ≤ 3 V
VIO > 3 V
VIO ≤ 3 V
No delay, conversion results available
immediately after conversion is complete
ISINK = 500 µA
ISOURCE = −500 µA
Specified performance
Full range
Each ADC
Each ADC
VDD and VIO = 2.5 V, 25°C
10 kSPS throughput
1 MSPS throughput
1 MSPS throughput
TMIN to TMAX
Min
2.4
−0.3
−0.3
0.7 × VIO
0.9 × VIO
−1
−1
VIO − 0.3
2.375
2.3
1.8
−40
Typ
330
10
2.0
2.0
Straight binary
2.5
1.4
0.2
0.35
140
12.0
7.0
3.3
1.7
7.0
1 In this data sheet, the voltages for the VDDx, VIOx, and REFx pins are indicated by VDD, VIO, and VREF, respectively.
2 With all digital inputs forced to VIOx or to ground, as required.
3 During the acquisition phase.
4 Contact Analog Devices, Inc., for the extended temperature range.
Max
5.1
+0.3 × VIO
+0.1 × VVIO
VIO + 0.3
VIO + 0.3
+1
+1
0
0.4
2.625
5.5
5.5
1.6
0.45
16
+125
Unit
V
µA
MHz
ns
ns
V
V
V
V
µA
µA
Bits
Samples
V
V
V
V
V
mA
mA
µA
µW
mW
mW
mW
mW
nJ/sample
°C
Rev. B | Page 4 of 28
5 Page 
AD7902
91
90
89
88
87
86
85
84
83
82
81
80
1k
10k 100k
INPUT FREQUENCY (Hz)
Figure 17. SINAD vs. Input Frequency
1M
92.5
92.0
91.5
91.0
90.5
90.0
89.5
–55 –35 –15
5
25 45 65
85 105 125
TEMPERATURE (°C)
Figure 18. SNR vs. Temperature
1.4
IVDD
1.2
1.0
0.8
0.6
IREF
0.4
IVIO
0.2
0
2.375
2.425
2.475
2.525
SUPPLY VOLTAGE (V)
2.575
2.625
Figure 19. Operating Currents for Each ADC vs. Supply Voltage
–90
–92
–94
–96
–98
–100
–102
–104
–106
–108
–110
1k
–100
Data Sheet
10k 100k
INPUT FREQUENCY (Hz)
Figure 20. THD vs. Input Frequency
1M
–105
–110
–115
–55 –35 –15
5
25 45 65
85 105 125
TEMPERATURE (°C)
Figure 21. THD vs. Temperature
1.6
TA = 25°C
1.4
1.2
1.0
0.8
IVDD
0.6
0.4
0.2
IVIO
0
10 100 1000
SAMPLE RATE (kSPS)
Figure 22. Operating Currents for Each ADC vs. Throughput
Rev. B | Page 10 of 28
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet AD7902.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AD790 | Fast/ Precision Comparator | Analog Devices |
| AD7902 | 1 MSPS PulSAR ADC | Analog Devices |
| AD79024 | 20-Bit Data Acquisition System | Analog Devices |
| AD7903 | PulSAR ADC | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |