ADS8364: 250kHz, 16-Bit, 6-Channel Simultaneous Sampling A/D Converters (Rev. B)

250kHz, 16-Bit, 6-Channel

Simultaneous Sampling

ANALOG-TO-DIGITAL CONVERTERS

FEATURES

6 INPUT CHANNELS

FULLY DIFFERENTIAL INPUTS

6 INDEPENDENT 16-BIT ADC

s TOTAL THROUGHPUT PER CHANNEL

TESTED NO MISSING CODES TO 14 BITS

BUFFERED REFERENCE INPUTS

LOW POWER: 450mW

TQFP-64 PACKAGE

APPLICATIONS

MOTOR CONTROL

MULTI-AXIS POSITIONING SYSTEMS

3-PHASE POWER CONTROL

DESCRIPTION

The ADS8364 includes six, 16-bit, 250KHz ADCs (Analog-to-
Digital converters) with 6 fully differential input channels
grouped into two pairs for high-speed simultaneous signal
acquisition. Inputs to the sample-and-hold amplifiers are fully
differential and are maintained differential to the input of the
ADC. This provides excellent common-mode rejection of
80dB at 50KHz that is important in high-noise environments.

The ADS8364 offers a flexible high-speed parallel interface
with a direct address mode, a cycle, and a FIFO mode. The
output data for each channel is available as a 16-bit word.

ADS8364

SBAS219B JUNE 2002 REVISED JULY 2004

www.ti.com

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.

ADS836

Interface

Conversion

and

Control

FIFO

EOC

Data
Input/Output

RESET

BYTE

CLK

CH A0

CH A0+

CH A1

CH A1+

SAR

CDAC

S/H

Amp

Comp

CDAC

Comp

S/H

Amp

CH B0

CH B0+

HOLDA

CH B1

CH B1+

SAR

CDAC

S/H

Amp

Comp

CDAC

Comp

S/H

Amp

CH C0

CH C0+

CH C1

CH C1+

REF

OUT

SAR

CDAC

S/H

Amp

Comp

CDAC

Comp

S/H

Amp

HOLDB

HOLDC

ADD

Internal

2.5V

Reference

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.

All trademarks are the property of their respective owners.

ADS8364

SBAS219B

www.ti.com

MAXIMUM

INTEGRAL

NO MISSING

SPECIFIED

LINEARITY

CODES

PACKAGE

TEMPERATURE

ORDERING

TRANSPORT

PRODUCT

ERROR (LSB)

PACKAGE-LEAD

DESIGNATOR

(1)

RANGE

NUMBER

MEDIA, QUANTITY

ADS8364Y

TQFP-64

PAG

C to +85

ADS8364Y/250

Tape and Reel, 250

ADS8364Y/2K

Tape and Reel, 2000

NOTES: (1) For the most current specifications and package information, refer to our website at www.ti.com.

PACKAGE/ORDERING INFORMATION

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings over operating free-air temperature (unless
otherwise noted)

(1)

Supply Voltage, AGND to AV

DD ...............................................................

0.3V to 6V

Supply Voltage, BGND to BV

DD ...............................................................

0.3V to 6V

Supply Voltage, DGND to DV

DD ..............................................................

0.3V to 6V

Analog Input Voltage Range ..................... AGND 0.3V to AV

+ 0.3V

Reference Input Voltage ........................... AGND 0.3V to AV

+ 0.3V

Digital Input Voltage Range ...................... BGND 0.3V to BV

+ 0.3V

Ground Voltage Differences, AGND to BGND/DGND .....................

0.3V

Voltage Differences, BV

, DV

to AGND .......................... 0.3V to 6V

Input Current ot Any Pin Except Supply ......................... 20mA to 20mA
Power Dissipation ....................................... See Dissipation Rating Table
Operating Virtual Junction Temperature Range, T

........ 40

C to 150

Operating Free-Air Temperature Range, T

...................... 40

C to 85

Storage Temperature Range, T

STG

.................................. 65

C to 150

Lead Temperature 1.6mm (1/16 inch) from Case for 10sec ..................... 260

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.

ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.

NOTE: (1) Stresses beyond those listed under "absolute maximum ratings" may
cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those
indicated under "recommended operating conditions" is not implied. Exposure
to absolute-maximum-rated conditions of extended periods may affect device
reliability.

RECOMMENDED OPERATING CONDITIONS

MIN

NOM

MAX

UNIT

Supply Voltage, AGND to AV

4.75

5.25

Supply Voltage, BGND to BV

Low-Voltage Levels

2.7

3.6

5V Logic Levels

4.5

5.5

Supply Voltage, DGND to DV

4.75

5.25

Difference AV

to DV

0.3

Reference Input Voltage

1.5

2.5

2.6

Operating Common-Mode Signal

2.2

2.5

2.8

Analog Inputs

+IN (IN)

REF

Operating Junction Temperature Range, T

125

DERATING

FACTOR

= 70

= 85

ABOVE

POWER

BOARD

PACKAGE

= 25

RATING

Low-K

(1)

DGK

8.6

C/W

68.5

C/W

14.598mW/

1824mW

1168mW

949mW

High-K

(2)

DGK

8.6

C/W

42.8

C/W

23.364mw/

2920mW

1869mW

1519mW

NOTES: (1) The JEDEC Low K (1s) board design used to derive this data was a 3-inch x 3-inch, two-layer board with 2-ounce copper traces on top of the board.
(2) The JEDEC High K (2s2p) board design used to derive this data was a 3-inch x 3-inch, multilayer board with 1-ounce internal power and ground planes and 2-ounce
copper traces on the top and bottom of the board.

PACKAGE DISSIPATION RATING TABLE

= 20

(SAMPLE)

= 20pF

BGND

AGND

Diode Turn-on Voltage: 0.35V

Equivalent Digital Input Circuit

Equivalent Analog Input Circuit

EQUIVALENT INPUT CIRCUIT

ADS8364

SBAS219B

www.ti.com

ELECTRICAL CHARACTERISTICS

Over recommended operating free-air temperature range at 40

C to 85

C, AV

= DV

= 5V, BV

= 3V, V

REF

= internal +2.5V, f

CLK

= 5MHz, f

SAMPLE

= 250kSPS,

unless otherwise noted.

ADS8364Y

PARAMETER

CONDITIONS

MIN

TYP

(1)

MAX

UNITS

ANALOG INPUT
Full-Scale Range

(FSR)

+IN (IN)

REF

Operating Common-Mode Signal

2.2

2.8

Input Resistance

IN = V

REF

Input Capacitance

IN = V

REF

Input Leakage Current

IN = V

REF

Differential Input Resistance

IN = V

REF

Differential Input Capacitance

IN = V

REF

Common-Mode Rejection Ratio

(CMRR)

At DC

1.25V

at 50kHz

Bandwith

(BW)

FS Sinewave, 3dB

300

MHz

DC ACCURACY

Resolution

Bits

No Missing Codes

(NMC)

Bits

Integral Linearity Error

(INL)

LSB

Integral Linearity Match

Only pair wise matching

1.5

LSB

Differential Nonlinearity

(DNL)

Specified only for 14-Bit

1.5

LSB

Bipolar Offset Error

)

0.05

Bipolar Offset Error Match

Only pair wise matching

0.2

Bipolar Offset Error Drift

(TCV

)

0.8

ppm/

Gain Error

ERR

)

Referenced to V

REF

0.05

0.25

%FSR

Gain Error Match

Only pair wise matching

0.005

0.05

%FSR

Gain Error Drift

(TCG

ERR

)

ppm/

Noise

120

RMS

Power-Supply Rejection Ratio

(PSRR)

4.75V < AV

< 5.25V

SAMPLING DYNAMICS

Conversion Time per ADC

CONV

)

50kHz

CLK

5MHz

3.2

320

Acquisition Time

)

CLK

= 5MHz

800

Throughput Rate

250

kSPS

Aperture Delay

Aperture Delay Matching

100

Aperture Jitter

Clock Frequncy

0.05

MHz

AC ACCURACY

Total Harmonic Distortion

(THD)

2.5V

at 100kHz

Spurous-Free Dynamic Range

(SFDR)

2.5V

at 100kHz

93.5

Signal-to-Noise Ratio

(SNR)

2.5V

at 100kHz

83.2

Signal-to-Noise Ratio + Distortion

(SINAD)

2.5V

at 100kHz

82.5

Channel-to-Channel Isolation

2.5V

at 50kHz

Effective Number of Bits

(ENOB)

13.3

Bits

VOLTAGE REFERENCE OUTPUT
Reference Voltage Output

OUT

)

2.475

2.5

2.525

Initial Accuracy

Output Voltage Temperature Drift

(dV

OUT

/dT)

ppm/

Output Voltage Noise

f = 0.1Hz to 10Hz, C

= 10

f = 10Hz to 10kHz, C

= 10

VRMS

Power-Supply Refection Ratio

(PSRR)

Output Current

OUT

)

Short-Circuit Current

)

0.5

Turn-On Settling Time

to 0.1% at C

= 0

100

VOLTAGE REFERENCE INPUT
Reference Voltage Input

)

1.5

2.5

2.6

Reference Input Resistance

100

Reference Input Capacitance

Reference Input Current

NOTE: (1) All values are at T

= 25

ADS8364

SBAS219B

www.ti.com

ELECTRICAL CHARACTERISTICS

(Cont.)

Over recommended operating free-air temperature range at 40

C to 85

C, AV

= DV

= 5V, V

REF

= internal +2.5V, f

CLK

= 5MHz, f

SAMPLE

= 250kSPS, unless

otherwise noted.

ADS8364Y

PARAMETER

CONDITIONS

MIN

TYP

(1)

MAX

UNITS

DIGITAL INPUTS

(2)

Logic Family

CMOS

High-Level Input Voltage

)

0.7 · BV

+ 0.3

Low-Level Input Voltage

)

0.3

0.3 · BV

Input Current

)

= BV

or GND

Input Capacitance

)

DIGITAL OUTPUTS

(2)

Logic Family

CMOS

High-Level Output Voltage

)

= 4.5V, I

= 100

4.44

Low-Level Output Voltage

)

= 4.5V, I

= 100

0.5

High-Impedance-State Output Current

)

CS = BV

, V

= BV

or GND

Output Capacitance

)

Load Capacitance

)

Data Format

Binary Two's Complement

DIGITAL INPUTS

(3)

Logic Family

LVCMOS

High-Level Input Voltage

)

= 3.6V

+ 0.3

Low-Level Input Voltage

)

= 2.7V

0.3

0.8

Input Current

)

= BV

or GND

Input Capacitance

)

DIGITAL OUTPUTS

(3)

Logic Family

LVCMOS

High-Level Output Voltage

)

= 2.7V, I

= 100

0.2

Low-Level Output Voltage

)

= 2.7V, I

= 100

0.2

High-Impedance-State Output Current

)

CS = BV

, VI = BV

or GND

Output Capacitance

)

Load Capacitance

)

Data Format

Binary Two's Complement

POWER SUPPLY

Analog Supply Voltage

(AV

)

4.75

5.25

Buffer I/O Supply Voltage

(BV

)

Low-Voltage Levels

2.7

3.6

5V Logic Levels

4.5

5.5

Digital Supply Voltage

(DV

)

4.75

5.25

Analog Operating Supply Current

(AI

)

Buffer I/O Operating Supply Current

(BI

)

= 3V

300

= 5V

200

300

Digital Operating Supply Current

(DI

)

2.5

Power Dissipation

= 3V

413.1

470.9

= 5V

413.5

471.5

NOTES: (1) All values are at T

= 25

C. (2) Applies for 5.0V nominal Supply: BV

(min) = 4.5V and BV

(max) = 5.5V. (3) Applies for 3.0V nominal Supply:

(min) = 2.7V and BV

(max) = 3.6V.

ADS8364

SBAS219B

www.ti.com

D10

D11

D12

D13

D14

D15

CH A1

CH A1+

AGND

SGND

CH B0+

CH B0

AGND

SGND

CH B1

CH B1+

AGND

SGND

CH C0+

CH A0

CH A0+

REF

OUT

AGND

HOLD C

HOLD B

HOLD A

ADD

RESET

BGND

CH C0

CH C1

CH C1+

DGND

BYTE

BGND

EOC

CLK

BGND

ADS8364

PIN CONFIGURATION

CH A1

Inverting Input Channel A1

CH A1+

Noninverting Input channel A1

Analog Power Supply

AGND

Analog Ground

SGND

Signal Ground

CH B0+

Noninverting Input Channel B0

CH B0

Inverting Input Channel B0

Analog Power Supply

AGND

Analog Ground

SGND

Signal Ground

CH B1

Inverting Input Channel B1

CH B1+

Noninverting Input Channel B1

Analog Power Supply

AGND

Analog Ground

SGND

Signal Ground

CH C0+

Noninverting Input Channel C0

CH C0

Inverting Input Channel C0

CH C1

Inverting Input Channel C1

CH C1+

Noninverting Input Channel C1

No Connection

DGND

Digital ground connected to AGND.

+5V Power Supply for Digital Logic Connected to AV

BYTE

2 x 8 Output Capability. Active HIGH.

Power supply for digital interface from 3V to 5V.

BGND

Buffer Digital Ground

First Data, A0 Data

EOC

End of Conversion, Active LOW

CLK

An external CMOS compatible clock can be applied to
the CLK input to synchronize the conversion process to
an external source.

Read, Active LOW

Write, Active LOW

Chip Select, Active LOW

BGND

Buffer Digital Ground

DB15

Data Bit 15-MSB

DB14

Data Bit 14

DB13

Data Bit 13

DB12

Data Bit 12

DB11

Data Bit 11

DB10

Data Bit 10

DB9

Data Bit 9

DB8

Data Bit 8

DB7

DIO

Data Bit 7, Software Input 7

DB6

DIO

Data Bit 6, Software Input 6

DB5

DIO

Data Bit 5, Software Input 5

DB4

DIO

Data Bit 4, Software Input 4

DB3

DIO

Data Bit 3, Software Input 3

DB2

DIO

Data Bit 2, Software Input 2

DB1

DIO

Data Bit 1, Software Input 1

DB0

DIO

Data Bit 0, Software Input 0

BGND

Buffer Digital Ground

Power Supply for Digital Interface from 3V to 5V

RESET

Global Reset, Active LOW

ADD

Address Mode Select

Address Line 3

Address Line 2

Address Line 1

HOLDA

Hold Command A

HOLDB

Hold Command B

HOLDC

Hold Command C

Analog Power Supply

AGND

Analog Ground

REF

OUT

Reference Output, attach 0.1

F and 10

F capacitors.

REF

Reference Input

CH A0+

Noninverting Input Channel A0

CH A0

Inverting Input Channel A0

PIN

NAME

I/O

DESCRIPTION

PIN

NAME

I/O

DESCRIPTION

PIN DESCRIPTIONS

NOTE: AI is Analog Input, AO is Analog Output, DI is Digital Input, DO is Digital Output, DIO is Digital Input/Output, P is Power Supply Connection.

Document Outline

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Document Outline

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: ADS8364Y/2K