AD9609BCPZ-20 Analog Devices Inc, AD9609BCPZ-20 Datasheet

10 Bit 20 Msps Low Pwr ADC

AD9609BCPZ-20

Manufacturer Part Number
AD9609BCPZ-20
Description
10 Bit 20 Msps Low Pwr ADC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD9609BCPZ-20

Number Of Bits
10
Sampling Rate (per Second)
20M
Data Interface
Serial, SPI™
Number Of Converters
1
Power Dissipation (max)
52mW
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-VFQFN, CSP Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
1.8 V analog supply operation
1.8 V to 3.3 V output supply
SNR
SFDR
Low power
Differential input with 700 MHz bandwidth
On-chip voltage reference and sample-and-hold circuit
2 V p-p differential analog input
DNL = ±0.10 LSB
Serial port control options
APPLICATIONS
Communications
Diversity radio systems
Multimode digital receivers
Smart antenna systems
Battery-powered instruments
Handheld scope meters
Portable medical imaging
Ultrasound
Radar/LIDAR
PET/SPECT imaging
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
45 mW at 20 MSPS
76 mW at 80 MSPS
GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA
61.5 dBFS at 9.7 MHz input
61.0 dBFS at 200 MHz input
75 dBc at 9.7 MHz input
73 dBc at 200 MHz input
Offset binary, gray code, or twos complement data format
Optional clock duty cycle stabilizer
Integer 1-to-8 input clock divider
Built-in selectable digital test pattern generation
Energy-saving power-down modes
Data clock out with programmable clock and data alignment
10-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
SENSE
RBIAS
1.8 V Analog-to-Digital Converter
VREF
VCM
VIN+
VIN–
The AD9609 operates from a single 1.8 V analog power
supply and features a separate digital output driver supply
to accommodate 1.8 V to 3.3 V logic families.
The patented sample-and-hold circuit maintains excellent
performance for input frequencies up to 200 MHz and is
designed for low cost, low power, and ease of use.
A standard serial port interface supports various product
features and functions, such as data output formatting,
internal clock divider, power-down, DCO and data output
(D9 to D0) timing and offset adjustments, and voltage
reference modes.
The AD9609 is packaged in a 32-lead RoHS compliant
LFCSP that is pin compatible with the
and the
path between 10-bit and 14-bit converters sampling from
20 MSPS to 80 MSPS.
CLK+ CLK–
SELECT
FUNCTIONAL BLOCK DIAGRAM
AVDD
AD9649
REF
DIVIDE
14-bit ADC, enabling a simple migration
1 TO 8
GND
BY
©2009 Analog Devices, Inc. All rights reserved.
PROGRAMMING DATA
Figure 1.
CORE
ADC
SDIO SCLK CSB
DCS
SPI
PDWN
AD9609
CONTROLS
MODE
AD9629
DFS MODE
AD9609
www.analog.com
DRVDD
12-bit ADC
OR
D9 (MSB)
D0 (LSB)
DCO

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AD9609BCPZ-20 Summary of contents

Page 1

FEATURES 1.8 V analog supply operation 1 3.3 V output supply SNR 61.5 dBFS at 9.7 MHz input 61.0 dBFS at 200 MHz input SFDR 75 dBc at 9.7 MHz input 73 dBc at 200 MHz input Low ...

Page 2

AD9609 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 ...

Page 3

GENERAL DESCRIPTION The AD9609 is a monolithic, single channel 1.8 V supply, 10-bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS analog-to-digital converter (ADC). It features a high performance sample-and- hold circuit and on-chip voltage reference. The product uses multistage differential pipeline architecture ...

Page 4

AD9609 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, 50% duty cycle clock, DCS disabled, unless otherwise noted. Table 1. Parameter ...

Page 5

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, 50% duty cycle clock, DCS disabled, unless otherwise noted. Table 2. 1 Parameter SIGNAL-TO-NOISE ...

Page 6

AD9609 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, 50% duty cycle clock, DCS disabled, unless otherwise noted. Table 3. Parameter DIFFERENTIAL ...

Page 7

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, 50% duty cycle clock, DCS disabled, unless otherwise noted. Table 4. Parameter CLOCK INPUT ...

Page 8

AD9609 TIMING SPECIFICATIONS Table 5. Parameter Conditions SPI TIMING REQUIREMENTS t Setup time between the data and the rising edge of SCLK DS t Hold time between the data and the rising edge of SCLK DH t Period of the ...

Page 9

ABSOLUTE MAXIMUM RATINGS Table 6. Parameter AVDD to AGND DRVDD to AGND VIN+, VIN− to AGND CLK+, CLK− to AGND VREF to AGND SENSE to AGND VCM to AGND RBIAS to AGND CSB to AGND SCLK/DFS to AGND SDIO/PDWN to ...

Page 10

AD9609 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 8. Pin Function Descriptions Pin No. Mnemonic Description 0 (Exposed Pad) AGND The exposed paddle is the only ground connection. It must be soldered to the analog ground of the PCB to ensure ...

Page 11

TYPICAL PERFORMANCE CHARACTERISTICS AD9609-80 AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, 50% duty cycle clock, DCS disabled, unless otherwise noted. 0 80MSPS 9.7MHz ...

Page 12

AD9609 AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, 50% duty cycle clock, DCS disabled, unless otherwise noted SFDR (dBc ...

Page 13

AD9609-65 AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, 50% duty cycle clock, DCS disabled, unless otherwise noted 65MSPS 9.7MHz @ –1dBFS ...

Page 14

AD9609 AD9609-40 AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, 50% duty cycle clock, DCS disabled, unless otherwise noted. 0 40MSPS 9.7MHz @ –1dBFS ...

Page 15

AD9609-20 AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, 50% duty cycle clock, DCS disabled, unless otherwise noted. 0 20MSPS 9.7MHz @ –1dBFS –20 ...

Page 16

AD9609 EQUIVALENT CIRCUITS AVDD VIN± Figure 26. Equivalent Analog Input Circuit AVDD VREF 7.5kΩ Figure 27. Equivalent VREF Circuit AVDD 375Ω SENSE Figure 28. Equivalent SENSE Circuit 5Ω CLK+ 15kΩ 15kΩ 5Ω CLK– Figure 29. Equivalent Clock Input Circuit 375Ω ...

Page 17

THEORY OF OPERATION The AD9609 architecture consists of a multistage, pipelined ADC. Each stage provides sufficient overlap to correct for flash errors in the preceding stage. The quantized outputs from each stage are combined into a final 10-bit result in ...

Page 18

AD9609 Differential Input Configurations Optimum performance is achieved while driving the AD9609 in a differential input configuration. For baseband applications, the AD8138, ADA4937-2, and ADA4938-2 differential drivers provide excellent performance and a flexible interface to the ADC. The output common-mode ...

Page 19

VOLTAGE REFERENCE A stable and accurate 1.0 V voltage reference is built into the AD9609. 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 are ...

Page 20

AD9609 CLOCK INPUT CONSIDERATIONS For optimum performance, clock the AD9609 sample clock inputs, CLK+ and CLK−, with a differential signal. The signal is typically ac-coupled into the CLK+ and CLK− pins via a transformer or capacitors. These pins are biased ...

Page 21

Clock Duty Cycle Typical high speed ADCs use both clock edges to generate a variety of internal timing signals and result, may be sensitive to clock duty cycle. Commonly, a ±5% tolerance is required on the clock duty ...

Page 22

AD9609 POWER DISSIPATION AND STANDBY MODE As shown in Figure 53, the analog core power dissipated by the AD9609 is proportional to its sample rate. The digital power dissipation of the CMOS outputs are determined primarily by the strength of ...

Page 23

TIMING The AD9609 provides latched data with a pipeline delay of eight clock cycles. Data outputs are available one propagation delay (t ) after the rising edge of the clock signal. PD Minimize the length of the output data lines ...

Page 24

AD9609 BUILT-IN SELF-TEST (BIST) AND OUTPUT TEST The AD9609 includes a built-in test feature designed to enable verification of the integrity of each channel as well as to facili- tate board level debugging. A built-in self-test (BIST) feature that verifies ...

Page 25

SERIAL PORT INTERFACE (SPI) The AD9609 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 customization, ...

Page 26

AD9609 HARDWARE INTERFACE The pins described in Table 14 constitute the physical interface between the programming device of the user and the serial port of the AD9609. The SCLK pin and the CSB pin function as inputs when using the ...

Page 27

MEMORY MAP READING THE MEMORY MAP REGISTER TABLE Each row in the memory map register table (see Table 17) contains eight bit locations. The memory map is roughly divided into four sections: the chip configuration registers (Address 0x00 to Address ...

Page 28

AD9609 MEMORY MAP REGISTER TABLE All address and bit locations that are not included in Table 17 are not currently supported for this device. Table 17. Addr Bit 7 (Hex) Register Name (MSB) Bit 6 Chip Configuration Registers 0x00 SPI ...

Page 29

Addr Bit 7 (Hex) Register Name (MSB) Bit 6 0x0E BIST enable Open Open 0x10 Offset adjust 8-bit device offset adjustment, Bits[7:0] (local) Offset adjust in LSBs from +127 to −128 (twos complement format) 0x14 Output mode 00 = 3.3 ...

Page 30

AD9609 MEMORY MAP REGISTER DESCRIPTIONS For additional information about functions controlled in Register 0x00 to Register 0xFF, see the AN-877 Application Note, Interfacing to High Speed ADCs via SPI. USR2 (Register 0x101) Bit 3—Enable GCLK Detect Normally set high, this ...

Page 31

APPLICATIONS INFORMATION DESIGN GUIDELINES Before starting design and layout of the AD9609 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. Power ...

Page 32

... AD9609BCPZ-65 –40°C to +85° AD9609BCPZRL7-65 –40°C to +85° AD9609BCPZ-40 –40°C to +85° AD9609BCPZRL7-40 –40°C to +85° AD9609BCPZ-20 –40°C to +85° AD9609BCPZRL7-20 –40°C to +85°C 1 AD9609-80EBZ AD9609-65EBZ 1 1 AD9609-40EBZ 1 AD9609-20EBZ RoHS Compliant Part. ...

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