AD7266BCPZ-REEL Analog Devices Inc, AD7266BCPZ-REEL Datasheet

IC,Data Acquisition System,6-CHANNEL,12-BIT,LLCC,32PIN,PLASTIC

AD7266BCPZ-REEL

Manufacturer Part Number

AD7266BCPZ-REEL

Description

IC,Data Acquisition System,6-CHANNEL,12-BIT,LLCC,32PIN,PLASTIC

Manufacturer

Analog Devices Inc

Datasheet

1.AD7266BCPZ-REEL.pdf (28 pages)

Specifications of AD7266BCPZ-REEL

Design Resources

AD7266 SAR ADC in DC-Coupled Differential and Single-Ended Appls (CN0039)

Number Of Bits

Sampling Rate (per Second)

Data Interface

DSP, MICROWIRE™, QSPI™, Serial, SPI™

Number Of Converters

Power Dissipation (max)

33.6mW

Voltage Supply Source

Analog and Digital

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

32-VFQFN, CSP Exposed Pad

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With

EVAL-AD7266CBZ - BOARD EVALUATION FOR AD7266

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 28
Download datasheet (683Kb)

FEATURES

Dual 12-bit, 3-channel ADC

Throughput rate: 2 MSPS

Specified for V

Power consumption

Pin-configurable analog inputs

70 dB SNR at 50 kHz input frequency

Accurate on-chip reference: 2.5 V

Dual conversion with read 437.5 ns, 32 MHz SCLK

High speed serial interface

−40°C to +125°C operation

Shutdown mode: 1 μA maximum

32-lead LFCSP and 32-lead TQFP

1 MSPS version,

GENERAL DESCRIPTION

The AD7266

approximation ADC that operates from a single 2.7 V to 5.25 V

power supply and features throughput rates up to 2 MSPS. The

device contains two ADCs, each preceded by a 3-channel

multiplexer, and a low noise, wide bandwidth track-and-hold

amplifier that can handle input frequencies in excess of 30 MHz.

The conversion process and data acquisition use standard

control inputs allowing easy interfacing to microprocessors or

DSPs. The input signal is sampled on the falling edge of CS ;

conversion is also initiated at this point. The conversion time is

determined by the SCLK frequency. There are no pipelined

delays associated with the part.

The AD7266 uses advanced design techniques to achieve very

low power dissipation at high throughput rates. With 5 V

supplies and a 2 MSPS throughput rate, the part consumes

6.2 mA maximum. The part also offers flexible power/

throughput rate management when operating in normal mode

as the quiescent current consumption is so low.

The analog input range for the part can be selected to be a 0 V

to V

complement output coding. The AD7266 has an on-chip 2.5 V

reference that can be overdriven when an external reference is

preferred. This external reference range is 100 mV to V

Rev. A

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.

9 mW at 1.5 MSPS with 3 V supplies

27 mW at 2 MSPS with 5 V supplies

12-channel single-ended inputs

6-channel fully differential inputs

6-channel pseudo differential inputs

±0.2% maximum @ 25°C, 20 ppm/°C maximum

SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible

REF

(or 2 × V

is a dual, 12-bit, high speed, low power, successive

REF

AD7265

of 2.7 V to 5.25 V

) range, with either straight binary or twos

Differential/Single-Ended Input, Dual

2 MSPS, 12-Bit, 3-Channel SAR ADC

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The AD7266 is available in a 32-lead LFCSP and a

32-lead TQFP.

PRODUCT HIGHLIGHTS

Protected by U.S. Patent No. 6,681,332

AGND AGND AGND D

Two Complete ADC Functions Allow Simultaneous

Sampling and Conversion of Two Channels.

Each ADC has three fully/pseudo differential pairs, or six

single-ended channels, as programmed. The conversion

result of both channels is simultaneously available on

separate data lines, or in succession on one data line if only

one serial port is available.

High Throughput with Low Power Consumption.

The AD7266 offers a 1.5 MSPS throughput rate with 11.4 mW

maximum power dissipation when operating at 3 V.

The AD7266 offers both a standard 0 V to V

and a 2 × V

No Pipeline Delay.

The part features two standard successive approximation

ADCs with accurate control of the sampling instant via a

CS input and once off conversion control.

REF SELECT

MUX

REF

FUNCTIONAL BLOCK DIAGRAM

BUF

T/H

REF

input range.

CAP

APPROXIMATION

SUCCESSIVE

CONTROL

CAP

12-BIT

LOGIC

12-BIT

Figure 1.

ADC

DGND

AD7266

DRIVERS

OUTPUT

DGND

AD7266

www.analog.com

REF

input range

SCLK

RANGE

SGL/DIFF

DRIVE

OUT

Related parts for AD7266BCPZ-REEL

AD7266BCPZ-REEL Summary of contents

Page 1

FEATURES Dual 12-bit, 3-channel ADC Throughput rate: 2 MSPS Specified for Power consumption 1.5 MSPS with 3 V supplies MSPS with 5 V supplies Pin-configurable ...

AD7266 TABLE OF CONTENTS Features .............................................................................................. 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and ...

Page 3

SPECIFICATIONS 2 3 MIN MAX MHz MSPS 2 5.25 V; specifications apply using internal reference or ...

Page 4

AD7266 Parameter DC Leakage Current Input Capacitance REFERENCE INPUT/OUTPUT 8 Reference Output Voltage Long-Term Stability 2 Output Voltage Hysteresis Reference Input Voltage Range DC Leakage Current Input Capacitance Output Impedance CAP CAP Reference Temperature Coefficient V ...

Page 5

TIMING SPECIFICATIONS 5.25 V, internal/external reference = 2 DRIVE Table 2. Parameter Limit MIN MAX ...

Page 6

AD7266 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter V to AGND DGND DGND DRIVE V to AGND DRIVE AGND to DGND Analog Input Voltage to AGND Digital Input Voltage to ...

Page 7

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS DGND 1 PIN 1 REF SELECT 2 INDICATOR CAP AD7266 AGND 5 TOP VIEW AGND 6 (Not to Scale Figure 2. Pin Configuration ...

Page 8

AD7266 Pin No. Mnemonic Description 28 Serial Data Outputs. The data output is supplied to each pin as a serial data stream. The bits are clocked out on the OUT D B falling edge of the SCLK ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, unless otherwise noted. A –60 INTERNAL REFERENCE –70 –80 EXTERNAL REFERENCE –90 –100 –110 100mV p-p SINE WAVE DECOUPLING SINGLE-ENDED MODE –120 0 200 400 600 800 1000 1200 1400 ...

Page 10

AD7266 1.0 V DIFFERENTIAL MODE 0.8 POSITIVE DNL 0.6 0.4 POSITIVE INL 0.2 0 –0.2 NEGATIVE INL –0.4 –0.6 NEGATIVE DNL –0.8 –1.0 0 0.5 1.0 1.5 V (V) REF Figure 10. Linearity Error vs. V 12.0 11.5 11.0 V ...

Page 11

TERMINOLOGY Differential Nonlinearity (DNL) Differential nonlinearity is the difference between the measured and the ideal 1 LSB change between any two adjacent codes in the ADC. Integral Nonlinearity (INL) Integral nonlinearity is the maximum deviation from a straight line passing ...

Page 12

AD7266 The AD7266 is tested using the CCIF standard where two input frequencies near the top end of the input bandwidth are used. In this case, the second-order terms are usually distanced in frequency from the original sine waves, while ...

Page 13

THEORY OF OPERATION CIRCUIT INFORMATION The AD7266 is a fast, micropower, dual, 12-bit, single-supply, ADC that operates from a 2 5.25 V supply. When operated from supply, the AD7266 is capable of throughput rates ...

Page 14

AD7266 IN IN– Figure 18. Equivalent Analog Input Circuit, Conversion Phase—Switches Open, Track Phase—Switches Closed When no amplifier is used to drive the analog ...

Page 15

Differential Mode The AD7266 can have a total of six differential analog input pairs. Differential signals have some benefits over single-ended signals, including noise immunity based on the device’s common-mode rejection and improvements in distortion performance. Figure 23 defines the ...

Page 16

AD7266 Using an Op Amp Pair An op amp pair can be used to directly couple a differential signal to one of the analog input pairs of the AD7266. The circuit configurations illustrated in Figure 26 and Figure 27 show ...

Page 17

ANALOG INPUT SELECTION The analog inputs of the AD7266 can be configured as single- ended or true differential via the SGL/ DIFF logic pin, as shown in Figure 31. If this pin is tied to a logic low, the analog ...

Page 18

AD7266 TRANSFER FUNCTIONS The designed code transitions occur at successive integer LSB values (1 LSB, 2 LSB, and so on). In single-ended mode, the LSB size is V /4096 when the range is used, and the ...

Page 19

MODES OF OPERATION The mode of operation of the AD7266 is selected by controlling the (logic) state of the CS signal during a conversion. There are three possible modes of operation: normal mode, partial power- down mode, and full power-down ...

Page 20

AD7266 FULL POWER-DOWN MODE This mode is intended for use in applications where throughput rates slower than those in the partial power-down mode are required, as power-up from a full power-down takes substan- tially longer than that from partial power-down. ...

Page 21

THE PART BEGINS TO POWER UP SCLK D A OUT D B OUT POWER-UP TIMES As described in detail, the AD7266 has two power-down modes, partial power-down and full power-down. This section deals with the power-up time required ...

Page 22

AD7266 SERIAL INTERFACE Figure 41 shows the detailed timing diagram for serial inter- facing to the AD7266. The serial clock provides the conversion clock and controls the transfer of information from the AD7266 during conversion. CS The signal initiates the ...

Page 23

MICROPROCESSOR INTERFACING The serial interface on the AD7266 allows the part to be directly connected to a range of many different microprocessors. This section explains how to interface the AD7266 with some of the more common microcontroller and DSP serial ...

Page 24

AD7266 AD7266 TO ADSP-BF53x The ADSP-BF53x family of DSPs interface directly to the AD7266 without any glue logic required. The availability of secondary receive registers on the serial ports of the Blackfin® DSPs means only one serial port is necessary ...

Page 25

AD7266 TO DSP563xx The connection diagram in Figure 46 shows how the AD7266 can be connected to the ESSI (synchronous serial interface) of the DSP563xx family of DSPs from Motorola. There are two on-board ESSIs, and each is operated in ...

Page 26

AD7266 APPLICATION HINTS GROUNDING AND LAYOUT The analog and digital supplies to the AD7266 are independent and separately pinned out to minimize coupling between the analog and digital sections of the device. The printed circuit board (PCB) that houses the ...

Page 27

... ROTATED 90° CCW ORDERING GUIDE Model Temperature Range AD7266BCP –40°C to +125°C 1 AD7266BCPZ –40°C to +125°C 1 AD7266BCPZ-REEL7 –40°C to +125°C AD7266BCPZ-REEL 1 –40°C to +125°C 1 AD7266BSUZ –40°C to +125°C 1 AD7266BSUZ-REEL7 –40°C to +125°C 1 AD7266BSUZ-REEL –40°C to +125°C ...

Page 28

Related keywords

AD7266BCPZ-REEL datasheet
AD7266BCPZ-REEL data sheet
AD7266BCPZ-REEL pdf datasheet
AD7266BCPZ-REEL component
AD7266BCPZ-REEL part
AD7266BCPZ-REEL distributor
AD7266BCPZ-REEL RoHS
AD7266BCPZ-REEL datasheet download