|
|
PDF ADCS7478 Data sheet ( Hoja de datos )
| Número de pieza | ADCS7478 | |
| Descripción | 1MSPS/ 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23 | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADCS7478 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
|
No Preview Available !
June 2003
ADCS7476/ADCS7477/ADCS7478
1MSPS, 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23
General Description
The ADCS7476, ADCS7477, and ADCS7478 are low power,
monolithic CMOS 12-, 10- and 8-bit analog-to-digital con-
verters that operate at 1 MSPS. The ADCS7476/77/78 are
drop-in replacements for Analog Devices’ AD7476/77/78.
Each device is based on a successive approximation regis-
ter architecture with internal track-and-hold. The serial inter-
face is compatible with several standards, such as SPI™,
QSPI™, MICROWIRE™, and many common DSP serial in-
terfaces.
The ADCS7476/77/78 uses the supply voltage as a refer-
ence. This enables the devices to operate with a full-scale
input range of 0 to VDD. The conversion rate is determined
from the serial clock (SCLK) speed. These converters offer a
shutdown mode, which can be used to trade throughput for
power consumption. The ADCS7476/77/78 is operated with
a single supply that can range from +2.7V to +5.25V. Normal
power consumption during continuous conversion, using a
+3V or +5V supply, is 2 mW or 10 mW respectively. The
power down feature, which is enabled by a chip select (CS)
pin, reduces the power consumption to under 5 µW using a
+5V supply. All three converters are packaged in a 6-lead,
SOT-23 package that provides an extremely small footprint
for applications where space is a critical consideration.
These products are designed for operation over the
automotive/extended industrial temperature range of −40˚C
to +125˚C.
Features
n Variable power management
n Packaged in 6-lead, SOT-23
n Power supply used as reference
n Single +2.7V to +5.25V supply operation
n SPI™/QSPI™/MICROWIRE™/DSP compatible
Key Specifications
n Resolution with no Missing Codes
n Conversion Rate
n DNL
n INL
n Power Consumption
3V Supply
5V Supply
12/10/8 bits
1 MSPS
+0.5, -0.3 LSB (typ)
± 0.4 LSB (typ)
2 mW (typ)
10 mW (typ)
Applications
n Automotive Navigation
n FA/ATM Equipment
n Portable Systems
n Medical Instruments
n Mobile Communications
n Instrumentation and Control Systems
Connection Diagram
20057701
MICROWIRE™ is a trademark of National Semiconductor Corporation.
TRI-STATE® is a trademark of National Semiconductor Corporation.
QSPI™ and SPI™ are trademarks of Motorola, Inc.
© 2003 National Semiconductor Corporation DS200577
www.national.com
1 page  
ADCS7476/ADCS7477/ADCS7478 Specifications(Note 2) (Continued)
ADCS7477 Converter Electrical Characteristics
The following specifications apply for VDD = +2.7V to 5.25V, fSCLK = 20 MHz, fSAMPLE = 1 MSPS unless otherwise noted. Bold-
face limits apply for TA = −40˚C to +85˚C: all other limits TA = 25˚C, unless otherwise noted.
Symbol
Parameter
Conditions
Typical Limits
Units
STATIC CONVERTER CHARACTERISTICS
Resolution with No Missing Codes
10 Bits
INL Integral Non-Linearity
±0.2
±0.7 LSB (max)
DNL
Differential Non-Linearity
+0.3
-0.2
±0.7
LSB (max)
LSB (max)
VOFF
GE
Offset Error
Gain Error
±0.1
±0.2
±0.7
±1
LSB (max)
LSB (max)
DYNAMIC CONVERTER CHARACTERISTICS
SINAD
SNR
THD
SFDR
IMD
Signal-to-Noise Plus Distortion Ratio
Signal-to-Noise Ratio
Total Harmonic Distortion
Spurious-Free Dynamic Range
Intermodulation Distortion, Second
Order Terms
Intermodulation Distortion, Third
Order Terms
fIN = 100 kHz
fIN = 100 kHz
fIN = 100 kHz
fIN = 100 kHz
fa = 103.5 kHz, fb = 113.5 kHz
fa = 103.5 kHz, fb = 113.5 kHz
61.7
62
-77
78
61 dBFS (min)
dB
-73 dB (max)
74 dB (min)
-78 dB
-78 dB
FPBW -3 dB Full Power Bandwidth
+5V Supply
+3V Supply
11 MHz
8 MHz
POWER SUPPLY CHARACTERISTICS
VDD Supply Voltage
2.7
5.25
V (min)
V (max)
Normal Mode (Static)
VDD = +4.75V to +5.25V,
SCLK On or Off
VDD = +2.7V to +3.6V,
SCLK On or Off
2
1
mA
mA
IDD
Normal Mode (Operational)
Shutdown Mode
Power Consumption, Normal Mode
(Operational)
PD
Power Consumption, Shutdown Mode
ANALOG INPUT CHARACTERISTICS
VDD = +4.75V to +5.25V,
fSAMPLE = 1 MSPS
VDD = +2.7V to +3.6V,
fSAMPLE = 1 MSPS
VDD = +5V, SCLK Off
VDD = +5V, SCLK On
VDD = +5V, fSAMPLE = 1 MSPS
VDD = +3V, fSAMPLE = 1 MSPS
VDD = +5V, SCLK Off
VDD = +3V, SCLK Off
2.0 3.5 mA (max)
0.6 1.6 mA (max)
0.5 µA (max)
60 µA (max)
10
17.5
mW (max)
2 4.8 mW (max)
2.5 µW (max)
1.5 µW (max)
VIN Input Range
IDCL DC Leakage Current
CINA
Analog Input Capacitance
DIGITAL INPUT CHARACTERISTICS
0 to VDD
30
±1
V
µA (max)
pF
VIH
VIL
IIN
CIND
Input High Voltage
Input Low Voltage
Input Current
Digital Input Capacitance
VDD = +5V
VDD = +3V
VIN = 0V or VDD
2.4 V (min)
0.8 V (max)
0.4 V (max)
±10 nA ±1 µA (max)
2 4 pF (max)
5 www.national.com
5 Page 
Timing Diagrams
FIGURE 1. ADCS7476 Serial Interface Timing Diagram
20057702
FIGURE 2. ADCS7477 Serial Interface Timing Diagram
20057703
11 www.national.com
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ADCS7478.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADCS7476 | 1MSPS/ 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23 | National Semiconductor |
| ADCS7476 | 1MSPS 12-/10-/8-Bit ADC in SOT-23 WSON (Rev. F) |  Texas Instruments |
| ADCS7476AIMF | 1MSPS/ 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23 | National Semiconductor |
| ADCS7476AIMFX | 1MSPS/ 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23 | National Semiconductor |
| 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 |