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ADS1602 データシート PDF ( 特性, スペック, ピン接続図 )

部品番号 ADS1602
部品説明 16-Bit + 2.5MSPS Analog-to-Digital Converter
メーカ Burr-Brown
ロゴ Burr-Brown ロゴ 

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ADS1602 Datasheet, ADS1602 PDF,ピン配置, 機能
ADS1602
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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

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