|
|
PDF AD7654 Data sheet ( Hoja de datos )
| Número de pieza | AD7654 | |
| Descripción | Simultaneous Sampling ADC | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AD7654 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
|
No Preview Available !
Data Sheet
16-Bit, 500 kSPS PulSAR Dual,
2-Channel, Simultaneous Sampling ADC
AD7654
FEATURES
Dual, 16-bit, 2-channel simultaneous sampling ADC
16-bit resolution with no missing codes
Throughput:
500 kSPS (normal mode)
444 kSPS (impulse mode)
INL: ±3.5 LSB max (±0.0053% of full scale)
SNR: 89 dB typ at 100 kHz
THD: −100 dB at +100 kHz
Analog input voltage range: 0 V to 5 V
No pipeline delay
Parallel and serial 5 V/3 V interface
SPI®/QSPI™/MICROWIRE™/DSP compatible
Single 5 V supply operation
Power dissipation:
120 mW typical
2.6 mW at 10 kSPS
Packages:
48-lead low profile quad flat package (LQFP)
48-lead lead frame chip scale package (LFCSP)
Low cost
APPLICATIONS
AC motor control
3-phase power control
4-channel data acquisition
Uninterrupted power supplies
Communications
GENERAL DESCRIPTION
The AD7654 is a low cost, simultaneous sampling, dual-channel,
16-bit, charge redistribution SAR, analog-to-digital converter
that operates from a single 5 V power supply. It contains two
low noise, wide bandwidth, track-and-hold amplifiers that allow
simultaneous sampling, a high speed 16-bit sampling ADC, an
internal conversion clock, error correction circuits, and both
serial and parallel system interface ports. Each track-and-hold
has a multiplexer in front to provide a 4-channel input ADC.
The A0 multiplexer control input allows the choice of
simultaneously sampling input pairs INA1/INB1 (A0 = low) or
INA2/INB2 (A0 = high). The part features a very high sampling
rate mode (normal) and, for low power applications, a reduced
power mode (impulse) where the power is scaled with the
throughput. Operation is specified from −40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
AVDD AGND REFGND REFx
DVDD DGND
INA1
INAN
INA2
A0
INB1
INBN
INB2
PD
RESET
TRACK/HOLD
×2
MUX
MUX
SWITCHED
CAP DAC
MUX
CLOCK
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
AD7654
SERIAL
PORT 16
PARALLEL
INTERFACE
OVDD
OGND
D[15:0]
SER/PAR
EOC
BUSY
CS
RD
A/B
BYTESWAP
IMPULSE
CNVST
Figure 1.
Table 1. PulSAR® Selection
Type/kSPS
100 to 250
Pseudo Differential AD7660/
AD7661
True Bipolar
True Differential
18-Bit
Multichannel/
Simultaneous
AD7663
AD7675
AD7678
500 to 570
AD7650/
AD7652
AD7664/
AD7666
AD7665
AD7676
AD7679
AD7654
800 to 1000
AD7653
AD7667
AD7671
AD7677
AD7674
AD7655
>1000
AD7621
AD7623
AD7641
PRODUCT HIGHLIGHTS
1. Simultaneous Sampling.
The AD7654 features two sample-and-hold circuits that
allow simultaneous sampling. It provides inputs for four
channels.
2. Fast Throughput.
The AD7654 is a 500 kSPS, charge redistribution, 16-bit
SAR ADC with internal error correction circuitry.
3. Superior INL and No Missing Codes.
The AD7654 has a maximum integral nonlinearity of
3.5 LSB with no missing 16-bit codes.
4. Single-Supply Operation.
The AD7654 operates from a single 5 V supply. In impulse
mode, its power dissipation decreases with throughput.
5. Serial or Parallel Interface.
Versatile parallel or 2-wire serial interface arrangement is
compatible with both 3 V and 5 V logic.
Rev. D
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2002–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD7654
Data Sheet
Parameter
DIGITAL OUTPUTS
Data Format6
Pipeline Delay7
VOL
VOH
POWER SUPPLIES
Specified Performance
AVDD
DVDD
OVDD
Operating Current9
AVDD
DVDD
OVDD
Power Dissipation
TEMPERATURE RANGE11
Specified Performance
Test Conditions/Comments Min
Typ Max
ISINK = 1.6 mA
ISOURCE = −500 μA
500 kSPS throughput
500 kSPS throughput9
10 kSPS throughput10
444 kSPS throughput10
TMIN to TMAX
OVDD − 0.2
4.75 5
4.75 5
2.7
15.5
8.5
100
120
2.6
114
−40
0.4
5.25
5.25
5.258
135
125
+85
1 See the Analog Inputs section.
2 Linearity is tested using endpoints, not best fit.
3 LSB means least significant bit. Within the 0 V to 5 V input range, one LSB is 76.294 μV.
4 See the Terminology section. These specifications do not include the error contribution from the external reference.
5 All specifications in dB are referred to as full-scale input, FS; tested with an input signal at 0.5 dB below full scale unless otherwise specified.
6 Parallel or serial 16-bit.
7 Conversion results are available immediately after completed conversion.
8 The maximum should be the minimum of 5.25 V and DVDD + 0.3 V.
9 In normal mode; tested in parallel reading mode.
10 In impulse mode; tested in parallel reading mode.
11 Consult sales for extended temperature range.
Unit
V
V
V
V
V
mA
mA
μA
mW
mW
mW
°C
Rev. D | Page 4 of 27
5 Page 
AD7654
Data Sheet
Pin No. Mnemonic
35 CNVST
37
38
39, 41
40, 45
42, 43
44, 46
REF
REFGND
INB1, INB2
INBN, INAN
REFB, REFA
INA2, INA1
EPAD
Type1
DI
AI
AI
AI
AI
AI
AI
Description
Start Conversion. A falling edge on CNVST puts the internal sample-and-hold into the hold state and
initiates a conversion. In impulse mode (IMPULSE = high), if CNVST is held low when the acquisition
phase (t8) is complete, the internal sample-and-hold is put into the hold state and a conversion is
immediately started.
This input pin is used to provide a reference to the converter.
Reference Input Analog Ground.
Channel B Analog Inputs.
Analog Inputs Ground Senses. Allow to sense each channel ground independently.
These inputs are the references applied to Channel A and Channel B, respectively.
Channel A Analog Inputs.
Exposed Pad. The EPAD is connected to ground; however, this connection is not required to meet
specified performance.
1 AI means analog input; DI means digital input; DI/O means bidirectional digital; DO means digital output; P means power.
Rev. D | Page 10 of 27
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet AD7654.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AD7650 | Low Cost CMOS ADC | Analog Devices |
| AD7651 | Unipolar ADC | Analog Devices |
| AD7652 | Unipolar ADC | Analog Devices |
| AD7653 | 16-Bit 1 MSPS SAR Unipolar 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 |