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PDF ADS1602 Data sheet ( Hoja de datos )
| Número de pieza | ADS1602 | |
| Descripción | 16-Bit + 2.5MSPS Analog-to-Digital Converter | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ADS1602 (archivo pdf) en la parte inferior de esta página. Total 26 Páginas | ||
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ADS1602
www.DataSheet4U.com
SBAS341B − DECEMBER 2004 − REVISED APRIL 2005
16-Bit, 2.5MSPS
Analog-to-Digital Converter
FEATURES
D High Speed:
Data Rate: 2.5MSPS
Bandwidth: 1.23MHz
D Outstanding Performance:
SNR: 91dB at fIN = 100kHz, −1dBFS
THD: −101dB at fIN = 100kHz, −6dBFS
SFDR: 103dB at fIN = 100kHz, −6dBFS
D Ease-of-Use:
High-Speed 3-Wire Serial Interface
Directly Connects to TMS320 DSPs
On-Chip Digital Filter Simplifies Anti-Alias
Requirements
Simple Pin-Driven Control—No On-Chip
Registers to Program
Selectable On-Chip Voltage Reference
Simultaneous Sampling with Multiple
ADS1602s
D Low Power:
530mW at 2.5MSPS
Power-Down Mode
APPLICATIONS
D Sonar
D Vibration Analysis
D Data Acquisition
VREFP VREFN VMID RBIAS VCAP AVDD DVDD IOVDD
Reference and Bias Circuits
AINP
AINN
∆Σ
Modulator
Linear Phase
FIR Digital Filter
Serial
Interface
ADS1602
AGND
DGND
CLK
SYNC
FSO
FSO
SCLK
SCLK
DOUT
DOUT
OTR
PD
REFEN
DESCRIPTION
The ADS1602 is a high-speed, high-precision,
delta-sigma analog-to-digital converter (ADC)
manufactured on an advanced CMOS process. The
ADS1602 oversampling topology reduces clock jitter
sensitivity during the sampling of high-frequency, large
amplitude signals by a factor of four over that achieved by
Nyquist-rate ADCs. Consequently, signal-to-noise ratio
(SNR) is particularly improved. Total harmonic distortion
(THD) is −101dB, and the spurious-free dynamic range
(SFDR) is 103dB.
Optimized for power and performance, the ADS1602
dissipates only 530mW while providing a full-scale
differential input range of ±3V. Having such a wide input
range makes out-of-range signals unlikely. The OTR pin
indicates if an analog input out-of-range condition does
occur. The differential input signal is measured against the
differential reference, which can be generated internally or
supplied externally on the ADS1602.
The ADS1602 uses an inherently stable advanced
modulator with an on-chip decimation filter. The filter stop
band extends to 38.6MHz, which greatly simplifies the
anti-aliasing circuitry. The modulator samples the input
signal up to 40MSPS, depending on fCLK, while the 16x
decimation filter uses a series of four half-band FIR filter
stages to provide 75dB of stop band attenuation and
0.001dB of passband ripple.
Output data is provided over a simple 3-wire serial
interface at rates up to 2.5MSPS, with a −3dB bandwidth
of 1.23MHz. The output data or its complementary format
directly connects to DSPs such as TI’s TMS320 family,
FPGAs, or ASICs. A dedicated synchronization pin
enables simultaneous sampling with multiple ADS1602s
in multi-channel systems. Power dissipation is set by an
external resistor that allows a reduction in dissipation
when operating at slower speeds. All of the ADS1602
features are controlled by dedicated I/O pins, which
simplify operation by eliminating the need for on-chip
registers.
The high performing, easy-to-use ADS1602 is especially
suitable for demanding measurement applications in
sonar, vibration analysis, and data acquisition. The
ADS1602 is offered in a small, 7mm x 7mm TQFP-48
package and is specified from −40°C to +85°C.
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.
All other trademarks are the property of their respective owners.
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.
Copyright 2004−2005, Texas Instruments Incorporated
www.ti.com
1 page  
ADS1602
www.ti.com
SBAS341B − DECEMBwERw2w0.0D4a−tRaESVhIeSeEDt4AUP.cRoILm2005
ELECTRICAL CHARACTERISTICS (continued)
All specifications at TA = −40°C to +85°C, AVDD = 5V, DVDD = IOVDD = 3V, fCLK = 40MHz, External VREF = +3V, VCM = +1.45V,
and RBIAS = 37kΩ, unless otherwise noted.
ADS1602
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
Clock Input
Frequency (fCLK)
Duty Cycle
Digital Input/Output
40
fCLK = 40MHz 45 55
VIH
VIL
VOH
VOL
Input leakage
Power-Supply Requirements
IOH = 50µA
IOL = 50µA
DGND < VDIGIN < IOVDD
0.7 x IOVDD
DGND
IOVDD − 0.5
IOVDD
0.3 x IOVDD
DGND + 0.5
±10
AVDD
4.75 5.25
DVDD
2.7 3.3
IOVDD
AVDD current (IAVDD)
IOH = 50µA
REFEN = low
REFEN = high
2.7 5.25
110 125
88 98
DVDD current (IDVDD)
IOVDD current (IIOVDD)
Power dissipation
IOVDD = 3V
IOVDD = 3V
AVDD = 5V, DVDD = 3V,
IOVDD = 3V, REFEN = high
PD = low, CLK disabled
25 30
8 10
530 610
10
Temperature Range
Specified
−40 +85
Operating
−40 +105
Storage
−60 +150
UNIT
MHz
%
V
V
V
V
µA
V
V
V
mA
mA
mA
mA
mW
mW
°C
°C
°C
5
5 Page 
ADS1602
www.ti.com
SBAS341B − DECEMBwERw2w0.0D4a−tRaESVhIeSeEtD4UAP.cRoILm2005
TYPICAL CHARACTERISTICS (continued)
All specifications at TA = 25°C, AVDD = 5V, DVDD = IOVDD = 3V, fCLK = 40MHz, External VREF = +3V, VCM = +1.45V, and RBIAS = 37kΩ,
unless otherwise noted.
SNR, THD, and SFDR vs INPUT SIGNAL AMPLITUDE
140
120
100
SFDR
THD
80
SNR
60
40
20 fIN = 10kHz
−80 −70 −60 −50 −40 −30 −20 −10 0
Input Signal Amplitude, VIN (dB)
Figure 15
SNR, THD, and SFDR vs INPUT SIGNAL AMPLITUDE
140
120
100
SFDR
80
THD
SNR
60
40
fIN = 100kHz
20
−80 −70 −60 −50 −40 −30 −20 −10 0
Input Signal Amplitude, VIN (dB)
Figure 17
SNR, THD, and SFDR vs INPUT SIGNAL AMPLITUDE
140
120
100
SFDR
THD
80
60
SNR
40
fIN = 800kHz
20
−80 −70 −60 −50 −40 −30 −20 −10 0
Input Signal Amplitude, VIN (dB)
Figure 19
SNR, THD, and SFDR vs INPUT SIGNAL AMPLITUDE
120
110
100
SFDR
90
THD
80
SNR
70
60
50
40
30
fIN = 50kHz
20
−80 −70 −60 −50 −40 −30 −20 −10 0
Input Signal Amplitude, VIN (dB)
Figure 16
SNR, THD, and SFDR vs INPUT SIGNAL AMPLITUDE
140
120
100
SFDR THD
80
60
SNR
40
fIN = 500kHz
20
−80 −70 −60 −50 −40 −30 −20 −10 0
Input Signal Amplitude, VIN (dB)
Figure 18
SIGNAL−TO−NOISE RATIO
vs INPUT FREQUENCY
95
VIN = −1dB
90
VIN = −6dB
85
VIN = −10dB
80
75
70
10k
100k
Input Frequency, fIN (Hz)
Figure 20
1M
11
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet ADS1602.PDF ] | |
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