LTC7545AKG datasheet, PDF - EEWORLD Datasheet

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LTC7545AKG: DescriptionLTC7545A - Improved Industry Standard Parallel 12-Bit Multiplying DAC; Package: SSOP; Pins: 20; Temperature Range: 0°C to 70°C; CategoryAnalog mixed-signal IC converter; File Size147KB，8 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC7545AKG Overview

LTC7545A - Improved Industry Standard Parallel 12-Bit Multiplying DAC; Package: SSOP; Pins: 20; Temperature Range: 0°C to 70°C

LTC7545AKG Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	incompatible
Maker	Linear ( ADI )
Parts packaging code	SSOP
package instruction	SSOP,
Contacts	20
Manufacturer packaging code	G
Reach Compliance Code	not_compliant
ECCN code	EAR99
Maximum analog output voltage	10 V
Minimum analog output voltage
Converter type	D/A CONVERTER
Enter bit code	BINARY, OFFSET BINARY
Input format	PARALLEL, WORD
JESD-30 code	R-PDSO-G20
JESD-609 code	e0
length	7.2 mm
Maximum linear error (EL)	0.0122%
Humidity sensitivity level	1
Number of digits	12
Number of functions	1
Number of terminals	20
Maximum operating temperature	70 °C
Minimum operating temperature
Package body material	PLASTIC/EPOXY
encapsulated code	SSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	235
Certification status	Not Qualified
Maximum seat height	1.99 mm
Nominal supply voltage	5 V
surface mount	YES
Temperature level	COMMERCIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	20
width	5.29 mm

LTC7545AKG Preview

LTC7545A

Improved Industry Standard

Parallel 12-Bit Multiplying DAC

FEATURES

DESCRIPTIO

Improved Direct Replacement for AD7545A

and AD7545

DNL and INL Over Temperature:

±0.5LSB

Gain Error:

±1LSB

Maximum

4-Quadrant Multiplication

Single 5V or 15V Supply

Low Power Consumption

Low Cost

The LTC

7545A is a 12-bit multiplying digital-to-analog

converter (DAC) with a microprocessor compatible paral-

lel input. It is a superior pin compatible replacement for the

industry standard AD7545A and AD7545. Improvements

include better accuracy, better stability over temperature

and supply variations and lower sensitivity to output

amplifier offset.

This very versatile DAC is useful for 2-quadrant and

4-quadrant multiplying, programmable gain and filtering

and single supply noninverting voltage output operation.

Parts are available in 20-pin PDIP and SO packages and

commercial and industrial temperature grades.

, LTC and LT are registered trademarks of Linear Technology Corporation.

APPLICATI

Process Control and Industrial Automation

Software Controlled Gain Adjustment

Digitally Controlled Filter and Power Supplies

Automatic Test Equipment

TYPICAL APPLICATI

2-Quadrant Multiplying DAC Has Less Than

0.5LSB (Typ) Total Unadjusted Error

0.1µF

Integral Nonlinearity Over Temperature

1.0

INTEGRAL NONLINEARITY (LSB)

OUT1

33pF

0.5

= 85°C

= –40°C

–0.5

= 25°C

AGND

DGND

4–15

LTC7545A

–

REF

1097

OUT

7545A TA01

–1.0

512 1024 1536 2048 2560 3072 3584 4095

DIGITAL INPUT CODE

7545A TA02

LTC7545A

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

TOP VIEW

OUT1 1

AGND 2

DGND 3

DB11 (MSB) 4

DB10 5

DB9 6

DB8 7

DB7 8

DB6 9

DB5 10

G PACKAGE

20-LEAD PLASTIC SSOP

20 R

19 V

REF

18 V

17 WR

16 CS

15 DB0 (LSB)

14 DB1

13 DB2

12 DB3

11 DB4

N PACKAGE

20-LEAD PDIP

to AGND ............................................ –0.5V to 17V

to DGND ............................................. –0.5V to 17V

AGND to DGND .............................. –0.5V to V

+ 0.5V

DGND to AGND .............................. –0.5V to V

+ 0.5V

REF

to AGND,DGND .............................................

±25V

to AGND,DGND ............................................. .

±25V

Digital Inputs to DGND ................. – 0.5V to V

+ 0.5V

OUT1

to AGND, DGND ................. –0.5V to V

+ 0.5V

Maximum Junction Temperature .......................... 150°C

Operating Temperature Range

Commercial (K, L Versions) .................... 0°C to 70°C

Industrial (B, C Versions)................... –40° C to 85°C

Storage Temperature Range ................ –65°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300°C

ORDER PART

NUMBER

LTC7545ABG

LTC7545ABN

LTC7545ABSW

LTC7545ACG

LTC7545ACN

LTC7545ACSW

LTC7545AKG

LTC7545AKN

LTC7545AKSW

LTC7545ALG

LTC7545ALN

LTC7545ALSW

SW PACKAGE

20-LEAD PLASTIC SO WIDE

JMAX

= XXX°C,

= XXX°C/W (G)

JMAX

= 150°C,

= 100°C/W (N)

JMAX

= 150°C,

= 130°C/W (SW)

Consult factory for Military grade parts.

ELECTRICAL CHARACTERISTICS

= 5V or 15V, V

REF

= 10V, V

OUT1

= AGND = 0V, T

= T

MIN

to T

MAX,

unless otherwise noted.

SYMBOL

Accuracy

INL

DNL

PARAMETER

Resolution

Integral Nonlinearity

(Relative Accuracy)

Differential Nonlinearity

Gain Error

Gain Temperature Coefficient

OUT1 Leakage Current

CONDITIONS

LTC7545AK/AB

MIN

TYP

MAX

±0.5

±1

±2

±3

±10

±50

±0.002

150

LTC7545AL/AC

MIN

TYP

MAX

±0.5

±1

±2

±10

±50

±0.002

150

UNITS

Bits

LSB

ppm/°C

%/%

kΩ

µs

nV-sec

P-P

LKG

= 25°C

MIN

to T

MAX

Guaranteed Monotonic T

= 25°C

MIN

to T

MAX

MIN

to T

MAX

(Note 2)

= 25°C

MIN

to T

MAX

(Note 3)

∆Gain/∆Temperature

(Note 4)

= 25°C

MIN

to T

MAX

(Note 1)

PSRR

Power Supply Rejection

Reference Input

REF

Input Resistance

AC Performance

Output Current Settling Time

Propagation Delay

Digital-to-Analog Glitch Impulse

Multiplying Feedthrough Error

Analog Outputs

OUT

Output Capacitance (Note 3)

(Note 5)

(Notes 3, 6, 7)

(Notes 3, 6, 8)

(Notes 6, 9)

REF

±10V,

10kHz Sine Wave

DB0 to DB11 = 0V,

WR, CS = 0V

DB0 to DB11 = V

DD,

WR, CS = 0V

OUT1

W W

LTC7545A

ELECTRICAL CHARACTERISTICS

= 5V, V

REF

= 10V, V

OUT1

= AGND = 0V, T

= T

MIN

to T

MAX,

unless otherwise noted.

SYMBOL

Digital Inputs

Power Supply

Supply Voltage

Supply Current

All Digital Inputs = V

or V

All Digital Inputs = 0V or V

PARAMETER

Digital Input High Voltage

Digital Input Low Voltage

Digital Input Current

Digital Input Capacitance

CS to WR Setup Time

CS to WR Hold Time

Write Pulse Width

Data Setup Time

Data Hold Time

CONDITIONS

MIN

2.4

ALL GRADES

TYP

MAX

UNITS

0.8

0.001

±1

100

4.75

5.25

100

µA

(Note 3) V

= 0V

Timing Characteristics (Note 3)

= 15V, V

REF

= 10V, V

OUT1

= AGND = 0V, T

= T

MIN

to T

MAX,

unless otherwise noted.

SYMBOL

Digital Inputs

Power Supply

Supply Voltage

Supply Current

All Digital Inputs = V

or V

All Digital Inputs = 0V or V

PARAMETER

Digital Input High Voltage

Digital Input Low Voltage

Digital Input Current

Digital Input Capacitance

CS to WR Setup Time

CS to WR Hold Time

Write Pulse Width

Data Setup Time

Data Hold Time

CONDITIONS

MIN

13.5

ALL GRADES

TYP

MAX

UNITS

1.5

±1

14.25

15.75

100

µA

(Note 3) V

= 0V

Timing Characteristics (Note 3)

The

denotes specificatons which apply over the full operating

temperature range.

Note 1:

±0.5LSB

±0.012%

of full scale.

Note 2:

Using internal feedback resistor.

Note 3:

Guaranteed by design, not subject to test.

Note 4:

OUT1

with DAC register loaded to all 0s.

Note 5:

Typical temperature coefficient is 100ppm/°C.

Note 6:

OUT1 load = 100Ω in parallel with 13pF.

Note 7:

To 0.01% for a full-scale change, measured from the falling

edge of WR, CS = 0V.

Note 8:

From digital input change to 90% of final analog output.

Note 9:

REF

= 0V. DAC register contents changed from all 0s to all 1s

or all 1s to all 0s.

LTC7545A

BLOCK DIAGRAM

20k

REF

40k

10k

20k

20 R

1 OUT1

2 AGND

DECODER

3 DGND

WR 17

CS 16

LOAD

INPUT DATA LATCHES

DB11

(MSB)

DB10

DB9

DB8

• • • • • • • 15

DB0

(LSB)

7545A BD

TI I G DIAGRA

DATA IN

DB0 to DB11

DATA VALID

7545A TD

LTC7545A

TYPICAL APPLICATIONS

Unipolar Operation (2-Quadrant Multiplication)

REF

–10V TO 10V

5V OR 15V

0.1µF

REF

µP

4–15

LTC7545A

OUT1

AGND

DGND

33pF

Table 1. Unipolar Binary Code Table

DIGITAL INPUT

BINARY NUMBER

ANALOG OUTPUT

IN DAC LATCH

OUT

MSB

LSB

1111

– V

REF

(4095/4096)

1000

0000

– V

REF

(2048/4096) = – V /2

REF

0000

0001

– V

REF

(1/4096)

0000

DB11 to DB0

–

LT1097

OUT

0V TO – V

REF

7545A TA03

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