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PDF ADS1245 Data sheet ( Hoja de datos )
| Número de pieza | ADS1245 | |
| Descripción | Low-Power/ 24-Bit Analog-to-Digital Converter | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ADS1245 (archivo pdf) en la parte inferior de esta página. Total 26 Páginas | ||
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February 2005
ADC12DL040
Dual 12-Bit, 40 MSPS, 3V, 210mW A/D Converter
General Description
The ADC12DL040 is a dual, low power monolithic CMOS
analog-to-digital converter capable of converting analog in-
put signals into 12-bit digital words at 40 Megasamples per
second (MSPS). This converter uses a differential, pipeline
architecture with digital error correction and an on-chip
sample-and-hold circuit to minimize die size and power con-
sumption while providing excellent dynamic performance
and a 250 MHz Full Power Bandwidth. Operating on a single
+3.0V power supply, the ADC12DL040 achieves 11.1 effec-
tive bits at nyquist and consumes just 210 mW at 40 MSPS,
including the reference current. The Power Down feature
reduces power consumption to 36 mW.
The differential inputs provide a full scale differential input
swing equal to 2 times VREF with the possibility of a single-
ended input. Full use of the differential input is recom-
mended for optimum performance. The digital outputs from
the two ADC’s are available on a single multiplexed 12-bit
bus or on separate buses. Duty cycle stabilization and output
data format are selectable using a quad state function pin.
The output data can be set for offset binary or two’s comple-
ment.
To ease interfacing to lower voltage systems, the digital
output driver power pins of the ADC12DL040 can be con-
nected to a separate supply voltage in the range of 2.4V to
the analog supply voltage.
This device is available in the 64-lead TQFP package and
will operate over the industrial temperature range of −40˚C to
+85˚C. An evaluation board is available to ease the evalua-
tion process.
Features
n Single +3.0V supply operation
n Internal sample-and-hold
n Internal reference
n Outputs 2.4V to 3.6V compatible
n Power down mode
n On-chip reference
n Duty Cycle Stabilizer
n Multiplexed Output Mode
Key Specifications
n Resolution
n DNL
n SNR (fIN = 10 MHz)
n SFDR (fIN = 10 MHz)
n Data Latency
n Power Consumption
n -- Operating
n -- Power Down Mode
Applications
n Ultrasound and Imaging
n Instrumentation
n Communications Receivers
n Sonar/Radar
n xDSL
n Cable Modems
n DSP Front Ends
12 Bits
±0.3 LSB (typ)
69 dB (typ)
85 dB (typ)
7 Clock Cycles
210 mW (typ)
36 mW (typ)
Connection Diagram
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 2005 National Semiconductor Corporation DS201002
20100201
www.national.com
1 page  
Absolute Maximum Ratings (Notes 1,
2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VA, VD, VDR
|VA–VD|
Voltage on Any Input or Output Pin
4.2V
≤ 100 mV
−0.3V to (VA or VD
+0.3V)
Input Current at Any Pin (Note 3)
±25 mA
Package Input Current (Note 3)
±50 mA
Package Dissipation at TA = 25˚C
ESD Susceptibility
See (Note 4)
Human Body Model (Note 5)
2500V
Machine Model (Note 5)
250V
Storage Temperature
−65˚C to +150˚C
Soldering process must comply with National
Semiconductor’s Reflow Temperature Profile
specifications. Refer to www.national.com/packaging.
(Note 6)
Operating Ratings (Notes 1, 2)
Operating Temperature
Supply Voltage (VA, VD)
Output Driver Supply (VDR)
CLK, PD, OEA, OEB
Analog Input Pins
VCM
|AGND–DGND|
−40˚C ≤ TA ≤ +85˚C
+2.7V to +3.6V
+2.4V to VD
−0.05V to (VD + 0.05V)
0V to 2.6V
0.5V to 2.0V
≤100mV
Converter Electrical Characteristics
Unless otherwise specified, the following specifications apply for AGND = DGND = DR GND = 0V, VA = VD = +3.0V, VDR =
+2.5V, PD = 0V, External VREF = +1.0V, fCLK = 40 MHz, fIN = 10 MHz, tr = tf = 2 ns, CL = 15 pF/pin, Duty Cycle Stabilizer On,
parallel output mode. Boldface limits apply for TJ = TMIN to TMAX: all other limits TJ = 25˚C (Notes 7, 8, 9)
Symbol
Parameter
Conditions
Typical Limits
(Note 10) (Note 10)
Units
(Limits)
STATIC CONVERTER CHARACTERISTICS
Resolution with No Missing Codes
12 Bits (min)
INL Integral Non Linearity (Note 11)
±0.8
± 2.6
LSB (max)
DNL
Differential Non Linearity
±0.3
+0.96,
-0.9
LSB (max)
PGE
Positive Gain Error
±0.2
+2.5,
-3.3
%FS (max)
NGE
Negative Gain Error
±0.2
±3.6
%FS (max)
TC GE
VOFF
TC
VOFF
Gain Error Tempco
Offset Error (VIN+ = VIN−)
Offset Error Tempco
Under Range Output Code
−40˚C ≤ TA ≤ +85˚C
−40˚C ≤ TA ≤ +85˚C
5 ppm/˚C
0.1
±0.8
%FS (max)
3 ppm/˚C
00
Over Range Output Code
4095
4095
REFERENCE AND ANALOG INPUT CHARACTERISTICS
VCM Common Mode Input Voltage
0.5
1.5
2.0
V (min)
V (max)
VRMA,
VRMB
CIN
VREF
Reference Output Voltage
VIN Input Capacitance (each pin to
GND)
External Reference Voltage (Note
13)
Output load = 1 mA
VIN = 2.5 Vdc
+ 0.7 Vrms
(CLK LOW)
(CLK HIGH)
1.5
8
7
1.00
0.8
1.2
V
pF
pF
V (min)
V (max)
Reference Input Resistance
1 MΩ (min)
5 www.national.com
5 Page 
Transfer Characteristic
FIGURE 1. Transfer Characteristic
20100210
11 www.national.com
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet ADS1245.PDF ] | |
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