AD7452BRT-R2 Analog Devices Inc, AD7452BRT-R2 Datasheet
AD7452BRT-R2
Specifications of AD7452BRT-R2
Related parts for AD7452BRT-R2
AD7452BRT-R2 Summary of contents
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FEATURES Specified for and Low power at max throughput rate: 3.3 mW max at 555 kSPS with 3 V supplies 7.25 mW max at 555 kSPS with 5 V supplies Fully differential analog ...
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AD7452 TABLE OF CONTENTS AD7452–Specifications.................................................................... 3 Timing Specifications .................................................................. 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Terminology ...................................................................................... 8 AD7452–Typical Performance Characteristics .......................... 10 Circuit Information ........................................................................ 13 Converter Operation.................................................................. 13 ADC Transfer ...
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AD7452–SPECIFICATIONS MHz 555 kSPS SCLK unless otherwise noted. CM REF A MIN MAX Table ...
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AD7452 Parameter CONVERSION RATE Conversion Time 3 Track-and-Hold Acquisition Time Throughput Rate POWER REQUIREMENTS Normal Mode (Static) Normal Mode (Operational) Full Power-Down Mode Power Dissipation Normal Mode (Operational) Full Power-Down 1 Common-mode voltage. The ...
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TIMING SPECIFICATIONS Guaranteed by characterization. All input signals are specified with (10 level. See Figure 2 and the Serial Interface section 2 3 ...
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AD7452 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to GND GND IN GND IN– Digital Input Voltage to GND Digital Output Voltage to GND V to GND REF ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Mnemonic Function V Reference Input for the AD7452. An external reference must be applied to this input. For power supply, the reference is REF 2.5 V (± ...
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AD7452 TERMINOLOGY Signal-to-(Noise + Distortion) Ratio The measured ratio of signal to (noise + distortion) at the output of the ADC. The signal is the rms amplitude of the fun- damental. Noise is the sum of all nonfundamental signals up ...
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Positive Gain Error This is the deviation of the last code transition (011...110 to 011...111) from the ideal V – V (i.e., V IN+ IN– zero code error has been adjusted out. Negative Gain Error This is the deviation of ...
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AD7452 AD7452–TYPICAL PERFORMANCE CHARACTERISTICS T = 25° 555 kSPS MHz, unless otherwise noted SCLK 5.25V 3. FREQUENCY (kHz) Figure 5. SINAD ...
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POSITIVE DNL 0.5 0 –0.5 NEGATIVE DNL –1.0 0 0.5 1.0 1.5 2.0 2.5 V (V) REF Figure 11. Change in DNL vs. V for V REF DD 2.5 2.0 1.5 1.0 POSITIVE DNL 0.5 ...
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AD7452 10,000 IN+ IN– 9,000 10,000 CONVERSIONS 10,000 f = 555kSPS CODES S 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 2044 2045 2046 2047 CODE Figure 17. Histogram of 10,000 Conversions Input ...
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CIRCUIT INFORMATION The AD7452 is a 12-bit, low power, single-supply, successive approximation analog-to-digital converter (ADC). It can operate with power supply, and is capable of throughput rates up to 555 kSPS when supplied with ...
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AD7452 TYPICAL CONNECTION DIAGRAM Figure 21 shows a typical connection diagram for the AD7452 for both 5 V and 3 V supplies. In this setup, the GND pin is connected to the analog ground plane of the system. The V ...
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Figure 25 shows examples of the inputs to V different values of V for also gives the maximum REF DD and minimum common-mode voltages for each reference value according to Figure 23. REFERENCE = 2V ...
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AD7452 DRIVING DIFFERENTIAL INPUTS Differential operation requires that V IN+ ously driven with two equal signals that are 180° out of phase. The common mode must be set up externally and has a range determined the power ...
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Op Amp Pair An op amp pair can be used to directly couple a differential signal to the AD7452. The circuit configurations shown in Figure 30 and Figure 31 show how a dual op amp can be used to convert ...
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AD7452 DIGITAL INPUTS The digital inputs applied to the AD7452 are not limited by the maximum ratings, which limit the analog limits. Instead the digital inputs applied, i.e., CS and SCLK, can and are not restricted ...
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R 2.5V +2. –2. 0.1µF EXTERNAL V (2.5V) REF Figure 34. Applying a Bipolar Single-Ended Input to the AD7452 SERIAL INTERFACE Figure 2 shows a detailed timing diagram for the serial interface of the ...
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AD7452 MODES OF OPERATION The mode of operation of the AD7452 is selected by controlling the logic state of the CS signal during a conversion. There are two possible modes of operation, normal and power-down. The point at which CS ...
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POWER-UP TIME The power-up time of the AD7452 is typically 1 µs, which means that with any SCLK frequency MHz, one dummy cycle is always sufficient to allow the device to power up. Once the dummy cycle ...
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AD7452 POWER VS. THROUGHPUT RATE By using the power-down mode on the AD7452 when not con- verting, the average power consumption of the ADC decreases at lower throughput rates. Figure 39 shows how, as the through- put rate is reduced, ...
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AD7452* SCLK SDATA CS *ADDITIONAL PINS REMOVED FOR CLARITY Figure 40. Interfacing to the ADSP-21xx The timer registers, for example, are loaded with a value that provides an interrupt at the required sample interval. When an interrupt is received, a ...
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AD7452 APPLICATION HINTS Grounding and Layout The printed circuit board that houses the AD7452 should be designed so that the analog and digital sections are separated and confined to certain areas of the board. This facilitates the use of ground ...
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... OUTLINE DIMENSIONS 1.60 BSC 1.30 1.15 0.90 0.15 MAX ORDERING GUIDE Model Temperature Range AD7452BRT-R2 –40°C to +85°C AD7452BRT-REEL7 –40°C to +85°C EVAL-AD7452CB 3 4 EVAL-CONTROL BRD2 1 Linearity error here refers to integral nonlinearity error SOT-23. 3 This can be used as a standalone evaluation board or in conjunction with the evaluation board controller for evaluation/demonstration purposes. ...
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AD7452 NOTES Rev Page ...
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NOTES Rev Page AD7452 ...
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AD7452 NOTES © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C03154–0–2/04(B) Rev Page ...