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ANALOG-TO-DIGITAL CONVERTER. ADS5421 Datasheet

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ANALOG-TO-DIGITAL CONVERTER. ADS5421 Datasheet






ADS5421 CONVERTER. Datasheet pdf. Equivalent




ADS5421 CONVERTER. Datasheet pdf. Equivalent





Part

ADS5421

Description

40MHz Sampling ANALOG-TO-DIGITAL CONVERTER



Feature


ADS5421 ADS 542 1 SBAS237D – DECEMBER 2001 – REVISED JULY 2004 14-Bit, 40 MHz Sampling ANALOG-TO-DIGITAL CONVERTE R FEATURES q HIGH DYNAMIC RANGE: High S FDR: 83dB at 10MHz fIN www.DataSheet4U. com High SNR: 75dB at 10MHz f IN q PREM IUM TRACK-AND-HOLD: Differential Inputs Selectable Full-Scale Input Range q LO W POWER: 850mW q FLEXIBLE CLOCKING: Dif ferential or Single-En.
Manufacture

Burr-Brown Corporation

Datasheet
Download ADS5421 Datasheet


Burr-Brown Corporation ADS5421

ADS5421; ded Accepts Sine or Square Wave Clocking Down to 0.5Vp-p Variable Threshold Lev el DESCRIPTION The ADS5421 is a high-d ynamic range 14-bit, 40MHz, pipelined A nalog-to-Digital Converter (ADC). It in cludes a high-bandwidth linear track-an d-hold amplifier that gives excellent s purious performance up to and beyond th e Nyquist rate. The clock input can acc ept a low-level di.


Burr-Brown Corporation ADS5421

fferential sine wave or square wave sign al down to 0.5Vp-p, further improving t he Signal-to-Noise Ratio (SNR) performa nce. The ADS5421 has a 4Vp-p differenti al input range (2Vp-p • 2 inputs) for optimum Spurious-Free Dynamic Range (S FDR). The differential operation gives the lowest even-order harmonic componen ts. A lower input voltage can also be s elected using the in.


Burr-Brown Corporation ADS5421

ternal references, further optimizing SF DR. The ADS5421 is available in a small LQFP-64 package. APPLICATIONS q COMMU NICATIONS RECEIVERS q TEST INSTRUMENTAT ION q PROFESSIONAL CCD IMAGING +VS DV CLK ADS5421 Timing Circuitry CLK 1V p-p 1Vp-p IN T&H IN 14-Bit Pipelined ADC Core Error Correction Logic 3-Sta te Outputs D0 • • • D13 CM (+2. 5V) Reference Ladder and.

Part

ADS5421

Description

40MHz Sampling ANALOG-TO-DIGITAL CONVERTER



Feature


ADS5421 ADS 542 1 SBAS237D – DECEMBER 2001 – REVISED JULY 2004 14-Bit, 40 MHz Sampling ANALOG-TO-DIGITAL CONVERTE R FEATURES q HIGH DYNAMIC RANGE: High S FDR: 83dB at 10MHz fIN www.DataSheet4U. com High SNR: 75dB at 10MHz f IN q PREM IUM TRACK-AND-HOLD: Differential Inputs Selectable Full-Scale Input Range q LO W POWER: 850mW q FLEXIBLE CLOCKING: Dif ferential or Single-En.
Manufacture

Burr-Brown Corporation

Datasheet
Download ADS5421 Datasheet




 ADS5421
ADS5421
ADS5421
SBAS237D – DECEMBER 2001 – REVISED JULY 2004
14-Bit, 40MHz Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q HIGH DYNAMIC RANGE:
High SFDR: 83dB at 10MHz fIN
www.DataSheet4U.com High SNR: 75dB at 10MHz f
IN
q PREMIUM TRACK-AND-HOLD:
Differential Inputs
Selectable Full-Scale Input Range
q LOW POWER: 850mW
q FLEXIBLE CLOCKING:
Differential or Single-Ended
Accepts Sine or Square Wave Clocking Down to
0.5Vp-p
Variable Threshold Level
APPLICATIONS
q COMMUNICATIONS RECEIVERS
q TEST INSTRUMENTATION
q PROFESSIONAL CCD IMAGING
DESCRIPTION
The ADS5421 is a high-dynamic range 14-bit, 40MHz,
pipelined Analog-to-Digital Converter (ADC). It includes a
high-bandwidth linear track-and-hold amplifier that gives
excellent spurious performance up to and beyond the Nyquist
rate. The clock input can accept a low-level differential sine
wave or square wave signal down to 0.5Vp-p, further improving
the Signal-to-Noise Ratio (SNR) performance.
The ADS5421 has a 4Vp-p differential input range
(2Vp-p • 2 inputs) for optimum Spurious-Free Dynamic
Range (SFDR). The differential operation gives the lowest
even-order harmonic components. A lower input voltage can
also be selected using the internal references, further
optimizing SFDR.
The ADS5421 is available in a small LQFP-64 package.
1Vp-p
1Vp-p
ADS5421
IN
IN
CM
(+2.5V)
T&H
+VS
Timing Circuitry
14-Bit
Pipelined
ADC
Core
Error
Correction
Logic
DV
CLK
CLK
3-State
Outputs
D0
•••
D13
Reference Ladder
and Driver
Reference and
Mode Select
REFT
VREF SEL1 SEL2 REFB
OE VDRV
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright © 2001-2004 Texas Instruments, Incorporated




 ADS5421
ABSOLUTE MAXIMUM RATINGS(1)
+VSA, +VSD, VDRV ............................................................................... +6V
Analog Input .......................................................... (–0.3V) to (+VS + 0.3V)
Logic Input ............................................................ (–0.3V) to (+VS + 0.3V)
Case Temperature ......................................................................... +100°C
Junction Temperature .................................................................... +150°C
Storage Temperature ..................................................................... +150°C
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability. These are stress ratings only, and functional operation of the
device at these or any other conditions beyond those specified is not implied.
EVALUATION BOARD
PRODUCT
DESCRIPTION
ADS5421EVM Populated Evaluation Board
USER’S GUIDE
SBAU084
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
PACKAGE/ORDERING INFORMATION(1)
www.DataSheet4U.com
PRODUCT
PACKAGE-LEAD
PACKAGE
DESIGNATOR
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER
TRANSPORT
MEDIA, QUANTITY
ADS5421Y
"
LQFP-64
"
PM
–40°C to +85°C
ADS5421Y
ADS5421Y/T
Tape and Reel, 250
"
"
"
ADS5421Y/R
Tape and Reel, 1500
NOTE: (1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet.
ELECTRICAL CHARACTERISTICS
TA = specified temperature range, typical at +25°C, +VSA = +VSD = +5V, differential input range = 1.5V to 3.5V each input (4Vp-p), sampling rate = 40MHz, internal
reference, VDRV = +3V, and –1dBFS, unless otherwise noted.
PARAMETER
CONDITIONS
ADS5421Y
MIN TYP MAX
UNITS
RESOLUTION
SPECIFIED TEMPERATURE RANGE
ANALOG INPUT
Standard Differential Input Range
Common-Mode Voltage
Optional Input Ranges
Analog Input Bias Current
Analog Input Bandwidth
Input Capacitance
CONVERSION CHARACTERISTICS
Sample Rate
Data Latency
DYNAMIC CHARACTERISTICS
Differential Linearity Error (largest code error)
f = 1MHz
f = 10MHz
No Missing Codes
Integral Nonlinearity Error, f = 1MHz
Spurious-Free Dynamic Range(1)
f = 1MHz
f = 10MHz
f = 30MHz
2-Tone Intermodulation Distortion(3)
f = 14.5MHz and 15.5MHz (–7dB each tone)
Signal-to-Noise Ratio (SNR)
f = 1MHz
f = 10MHz
f = 30MHz
Signal-to-(Noise + Distortion) (SINAD)
f = 1MHz
f = 10MHz
f = 30MHz
Effective Number of Bits(4)
Output Noise
Aperture Delay Time
Aperture Jitter
Over-Voltage Recovery Time
Full-Scale Step Acquisition Time
Ambient Air
Full-Scale = 4Vp-p
Selectable
f = 1MHz
IN and IN tied to CM
14 Tested
–40 to +85
Bits
°C
1.5 3.5
2.5
2Vp-p or 3Vp-p
1
500
9
V
V
V
µA
MHz
pF
1M
40M
Samples/sec
10 Clk Cyc
±0.5
±0.5
Tested
±2.5
±1.0
LSB
LSB
LSB
88
78 85
82
dBFS(2)
dBFS
dBFS
–90 dBc
76
72 75
75
dBFS
dBFS
dBFS
75
72 74
74
12.2
0.4
3
1
5
5
dB
dB
dBFS
Bits
LSB rms
ns
ps rms
ns
ns
2 ADS5421
www.ti.com
SBAS237D




 ADS5421
ELECTRICAL CHARACTERISTICS (Cont.)
TA = specified temperature range, typical at +25°C, +VSA = +VSD = +5V, differential input range = 1.5V to 3.5V each input (4Vp-p), sampling rate = 40MHz, internal
reference, VDRV = +3V, and –1dBFS, unless otherwise noted.
ADS5421Y
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL INPUTS
Clock Input
Logic Family (other than clock inputs)
High Level Input Current(5) (VIN = 5V)
Low Level Input Current (VIN = 0V)
High Level Input Voltage
Low Level Input Voltage
Input Capacitance
Rising Edge of Convert Clock
+0.5
+VSD
+3V/+5V Compatible CMOS
100
10
+2.0
+1.0
5
Vp-p
µA
µA
V
V
pF
DIGITAL OUTPUTS(6)
Logic Family
Logic Coding
Low Output Voltage (IOL = 50µA to 0.5mA)
High Output Voltage (IOH = 50µA to 0.5mA)
www.DataSheet4U.coLmow Output Voltage (IOL = 50µA to 1.6mA)
High Output Voltage (IOH = 50µA to 1.6mA)
3-State Enable Time
3-State Disable Time
Output Capacitance
VDRV = 3V
VDRV = 5V
OE = LOW
OE = HIGH
+3V/+5V Compatible CMOS
Straight Offset Binary
+0.2
+2.5
+0.2
+2.5
20 40
2 10
5
V
V
V
V
ns
ns
pF
ACCURACY
Zero Error (Referred to –FS)
Zero Error Drift (Referred to –FS)
Gain Error(7)
Gain Error Drift(7)
Power-Supply Rejection of Gain
Internal REF Tolerance (VREFT, VREFB)
External REF Voltage Range
Reference Input Resistance
at +25°C
at +25°C
VS = ±5%
Deviation from Ideal
±0.5
±1.0
%FS
15 ppm/°C
±0.2
±1.0
%FS
35 ppm/°C
68 dB
±10 ±50 mV
0.9 2 2.025 V
1.0 k
POWER-SUPPLY REQUIREMENTS
Supply Voltage: +VSA, +VSD
Supply Current: +IS
Output Driver Supply Current (VDRV)
Power Dissipation: VDRV = 5V
VDRV = 3V
Power Down
Thermal Resistance, θJA
LQFP-64
Operating, fIN = 10MHz
Operating, fIN = 10MHz
Operating
+4.75
+5.0
170
12
900
850
40
48
+5.25
925
V
mA
mA
mW
mW
mW
°C/W
NOTES: (1) Spurious-Free Dynamic Range refers to the magnitude of the largest harmonic. (2) dBFS means dB relative to Full-Scale. (3) 2-tone intermodulation
distortion is referred to the largest fundamental tone. This number will be 6dB higher if it is referred to the magnitude of the 2-tone fundamental envelope.
(4) Effective Number of Bits (ENOB) is defined by (SINAD – 1.76)/6.02. (5) A 50kpull-down resistor is inserted internally. (6) Recommended maximum
capacitance loading, 15pF. (7) Includes internal reference.
ADS5421
SBAS237D
www.ti.com
3



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