AD9231BCPZ-20 Analog Devices Inc, AD9231BCPZ-20 Datasheet
AD9231BCPZ-20
Specifications of AD9231BCPZ-20
Related parts for AD9231BCPZ-20
AD9231BCPZ-20 Summary of contents
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FEATURES 1.8 V analog supply operation 1 3.3 V output supply SNR 71.3 dBFS at 9.7 MHz input 69.0 dBFS at 200 MHz input SFDR 93 dBc at 9.7 MHz input 83 dBc at 200 MHz input Low ...
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AD9231 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 General Description ......................................................................... 3 Specifications..................................................................................... 4 DC Specifications ......................................................................... 4 AC Specifications.......................................................................... 5 Digital Specifications ................................................................... 6 Switching ...
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GENERAL DESCRIPTION The AD9231 is a monolithic, dual-channel, 1.8 V supply, 12-bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS analog-to-digital conver- ter (ADC). It features a high performance sample-and-hold circuit and on-chip voltage reference. The product uses multistage differential pipeline architecture with ...
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AD9231 SPECIFICATIONS DC SPECIFICATIONS AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. Table 1. Parameter Temp RESOLUTION Full ACCURACY ...
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AC SPECIFICATIONS AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. Table 2. 1 Parameter SIGNAL-TO-NOISE RATIO (SNR ...
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AD9231 DIGITAL SPECIFICATIONS AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. Table 3. Parameter DIFFERENTIAL CLOCK INPUTS (CLK+, CLK−) ...
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SWITCHING SPECIFICATIONS AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. Table 4. Parameter CLOCK INPUT PARAMETERS Input Clock Rate ...
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AD9231 TIMING SPECIFICATIONS Table 5. Parameter Conditions SYNC TIMING REQUIREMENTS t SYNC to rising edge of CLK setup time SSYNC t SYNC to rising edge of CLK hold time HSYNC SPI TIMING REQUIREMENTS t Setup time between the data and ...
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ABSOLUTE MAXIMUM RATINGS Table 6. Parameter AVDD to AGND DRVDD to AGND VIN+A, VIN+B, VIN−A, VIN−B to AGND CLK+, CLK− to AGND SYNC to AGND VREF to AGND SENSE to AGND VCM to AGND RBIAS to AGND CSB to AGND ...
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AD9231 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS (LSB) D0B NOTES CONNECT. 2. THE EXPOSED PADDLE MUST BE SOLDERED TO THE PCB GROUND TO ENSURE PROPER HEAT DISSIPATION, NOISE, AND MECHANICAL STRENGTH BENEFITS. Table 8. Pin Function Description ...
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Pin No. Mnemonic 49, 50, 53, 54, 59, 60, 63, 64 AVDD 51, 52 VIN+A, VIN−A 55 VREF 56 SENSE 57 VCM 58 RBIAS 61, 62 VIN−B, VIN+B Description 1.8 V Analog Supply Pins. Channel A Analog Inputs. Voltage Reference ...
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AD9231 TYPICAL PERFORMANCE CHARACTERISTICS AD9231-80 AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. 0 80MSPS –15 9.7MHz @ –1dBFS ...
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AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. 0 –20 SFDR (dBc) –40 IMD3 (dBc) –60 –80 SFDR (dBFS) ...
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AD9231 AD9231-65 AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. 0 65MSPS –15 9.7MHz @ –1dBFS SNR =70.3 (71.3dBFS) ...
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AD9231-40 AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. 0 40MSPS –15 9.7MHz @ –1dBFS SNR = 70.3dB (71.3dBFS) ...
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AD9231 AD9231-20 AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, DCS disabled, unless otherwise noted. 0 20MSPS –15 9.7MHz @ –1dBFS SNR = 70.3dB ...
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EQUIVALENT CIRCUITS AVDD VIN±x Figure 29. Equivalent Analog Input Circuit 5Ω CLK+ 15kΩ 15kΩ 5Ω CLK– Figure 30. Equivalent Clock Input Circuit AVDD DRVDD 30kΩ 350Ω SDIO/DCS 30kΩ Figure 31. Equivalent SDIO/DCS Input Circuit 0.9V Figure 33. Equivalent SCLK/DFS, SYNC, ...
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AD9231 DRVDD AVDD 30kΩ 350Ω CSB Figure 35. Equivalent CSB Input Circuit AVDD 375Ω SENSE Figure 36. Equivalent SENSE Circuit VREF Figure 37. Equivalent VREF Circuit Rev Page AVDD 375Ω 7.5kΩ ...
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THEORY OF OPERATION The AD9231 dual ADC design can be used for diversity recep- tion of signals, where the ADCs are operating identically on the same carrier but from two separate antennae. The ADCs can also be operated with independent ...
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AD9231 Input Common Mode The analog inputs of the AD9231 are not internally dc-biased. Therefore, in ac-coupled applications, the user must provide a dc bias externally. Setting the device so that VCM = AVDD/2 is recommended for optimum performance, but ...
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Single-Ended Input Configuration A single-ended input can provide adequate performance in cost-sensitive applications. In this configuration, SFDR and distortion performance degrade due to the large input common- mode swing. If the source impedances on each input are matched, there should ...
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AD9231 VOLTAGE REFERENCE A stable and accurate 1.0 V voltage reference is built into the AD9231. The VREF can be configured using either the internal 1.0 V reference or an externally applied 1.0 V reference voltage. The various reference modes ...
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External Reference Operation The use of an external reference may be necessary to enhance the gain accuracy of the ADC or improve thermal drift charac- teristics. Figure 48 shows the typical drift characteristics of the internal reference in 1.0 V ...
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AD9231 If a low jitter clock source is not available, another option couple a differential PECL signal to the sample clock input pins, as shown in Figure 52. The AD9510/AD9511/AD9512/ AD9513/AD9514/AD9515/AD9516/AD9517 excellent jitter performance. 0.1µF CLOCK INPUT ...
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Jitter Considerations High speed, high resolution ADCs are sensitive to the quality of the clock input. The degradation in SNR from the low fre- quency SNR (SNR ) at a given input frequency (f LF jitter (t ) can be ...
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AD9231 The AD9231 is placed in power-down mode either by the SPI port or by asserting the PDWN pin high. In this state, the ADC typically dissipates 2.2 mW. During power-down, the output drivers are placed in a high impedance ...
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BUILT-IN SELF-TEST (BIST) AND OUTPUT TEST The AD9231 includes a built-in self-test feature designed to enable verification of the integrity of each channel as well as to facilitate board level debugging. A built-in self-test (BIST) feature that verifies the integrity ...
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AD9231 SERIAL PORT INTERFACE (SPI) The AD9231 serial port interface (SPI) allows the user to configure the converter for specific functions or operations through a structured register space provided inside the ADC. The SPI gives the user added flexibility and ...
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HARDWARE INTERFACE The pins described in Table 13 constitute the physical interface between the programming device of the user and the serial port of the AD9231. The SCLK pin and the CSB pin function as inputs when using the SPI ...
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AD9231 MEMORY MAP READING THE MEMORY MAP REGISTER TABLE Each row in the memory map register table (see Table 16) has eight bit locations. The memory map is roughly divided into four sections: the chip configuration registers (Address 0x00 to ...
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MEMORY MAP REGISTER TABLE All address and bit locations that are not included in Table 16 are not currently supported for this device. Table 16. Addr Register Bit 7 (Hex) Name (MSB) Bit 6 Chip Configuration Registers 0x00 SPI port ...
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AD9231 Addr Register Bit 7 (Hex) Name (MSB) Bit 6 0x0E BIST enable Open Open 0x10 Offset adjust 8-bit device offset adjustment [7:0] (local) (local) Offset adjust in LSBs from +127 to −128 (twos complement format) 0x14 Output mode 00 ...
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Addr Register Bit 7 (Hex) Name (MSB) Bit 6 Digital Feature Control 0x100 Sync control Open Open (global) 0x101 USR2 Enable Open OEB Pin 47 (local) MEMORY MAP REGISTER DESCRIPTIONS For additional information about functions controlled in Register 0x00 to ...
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AD9231 APPLICATIONS INFORMATION DESIGN GUIDELINES Before starting design and layout of the AD9231 as a system recommended that the designer become familiar with these guidelines, which discuss the special circuit connections and layout requirements needed for certain pins. ...
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... AD9231BCPZRL7-65 −40°C to +85°C AD9231BCPZ-40 2 −40°C to +85°C 2 AD9231BCPZRL7-40 −40°C to +85°C 2 AD9231BCPZ-20 −40°C to +85°C 2 AD9231BCPZRL7-20 −40°C to +85°C AD9231-80EBZ AD9231-65EBZ AD9231-40EBZ AD9231-20EBZ RoHS Compliant Part. 2 The exposed paddle (Pin 0) is the only GND connection on the chip and must be connected to the PCB AGND. ...
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AD9231 NOTES ©2009–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08121-0-6/10(A) Rev Page ...