AD7545SQ Просмотр технического описания (PDF) - Analog Devices

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производитель

AD7545SQ

CMOS 12-Bit Buffered Multiplying DAC

Analog Devices 

AD7545

CHIP

SELECT

WRITE

DATA IN

(DB0–DB11)

tCS

tCH

tWR

tDS

tDH

VIH

VIL

DATA VALID

Write Cycle Timing Diagram

VDD

WRITE MODE:

MODE SELECTION

HOLD MODE:

0

CS AND WR LOW, DAC RESPONDS

EITHER CS OR WR HIGH, DATA BUS

TO DATA BUS (DB0–DB11) INPUTS. (DB0–DB11) IS LOCKED OUT; DAC

HOLDS LAST DATA PRESENT WHEN

VDD

WR OR CS ASSUMED HIGH STATE.

0

NOTES:

VDD = +5V; tr = tf = 20ns

VDD = +15V; tr = tf = 40ns

VDD

ALL INPUT SIGNAL RISE AND FALL TIMES MEASURED FROM 10% TO

90% OF VDD.

0

TIMING MEASUREMENT REFERENCE LEVEL IS VIH + VIL/2.

ABSOLUTE MAXIMUM RATINGS*

(TA = + 25°C unless otherwise noted)

VDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3, +17 V

Digital Input Voltage to DGND . . . . . . . –0.3 V, VDD +0.3 V

VRFB, VREF to DGND . . . . . . . . . . . . . . . . . . . . . . . . . ± 25 V

VPIN1 to DGND . . . . . . . . . . . . . . . . . . . . –0.3 V, VDD +0.3 V

AGND to DGND . . . . . . . . . . . . . . . . . –0.3 V, VDD + 0.3 V

Power Dissipation (Any Package) to +75°C . . . . . . . 450 mW

Derates above +75°C . . . . . . . . . . . . . . . . . . . . . . 6 mW/°C

Operating Temperature

Commercial (J, K, L, GL) Grades . . . . . . . . 0°C to +70°C

Industrial (A, B, C, GC) Grades . . . . . . . . –25°C to +85°C

Extended (S, T, U, GU) Grades . . . . . . . –55°C to +125°C

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

Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . +300°C

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those indicated in the operational

sections of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the AD7545 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

TERMINOLOGY

RELATIVE ACCURACY

The amount by which the D/A converter transfer function

differs from the ideal transfer function after the zero and full-

scale points have been adjusted. This is an endpoint linearity

measurement.

DIFFERENTIAL NONLINEARITY

The difference between the measured change and the ideal

change between any two adjacent codes. If a device has a differ-

ential nonlinearity of less than 1 LSB it will be monotonic, i.e.,

the output will always increase for an increase in digital code

applied to the D/A converter.

PROPAGATION DELAY

This is a measure of the internal delay of the circuit and is mea-

sured from the time a digital input changes to the point at which

the analog output at OUT1 reaches 90% of its final value.

DIGITAL-TO-ANALOG GLITCH IMPULSE

This is a measure of the amount of charge injected from the

digital inputs to the analog outputs when the inputs change

state. It is usually specified as the area of the glitch in nV secs

and is measured with VREF = AGND and an ADLH0032CG as

the output op amp, C1 (phase compensation) = 33 pF.

ORDERING GUIDE1

Model2

Temperature

Range

Relative

Accuracy

Maximum

Gain Error

TA = +25؇C

VDD = +5 V

Package

Options3

AD7545JN

AD7545AQ

AD7545SQ

AD7545KN

AD7545BQ

AD7545TQ

AD7545LN

AD7545CQ

AD7545UQ

AD7545GLN

AD7545GCQ

AD7545GUQ

AD7545JP

AD7545SE

AD7545KP

AD7545TE

AD7545LP

AD7545UE

AD7545GLP

AD7545GUE

0°C to +70°C

–25°C to +85°C

–55°C to +125°C

0°C to +70°C

–25°C to +85°C

–55°C to +125°C

0°C to +70°C

–25°C to +85°C

–55°C to +125°C

0°C to +70°C

–25°C to +85°C

–55°C to +125°C

0°C to +70°C

–55°C to +125°C

0°C to +70°C

–55°C to +125°C

0°C to +70°C

–55°C to +125°C

0°C to +70°C

–55°C to +125°C

± 2 LSB

± 2 LSB

± 2 LSB

± 1 LSB

± 1 LSB

± 1 LSB

± 1/2 LSB

± 1/2 LSB

± 1/2 LSB

± 1/2 LSB

± 1/2 LSB

± 1/2 LSB

± 2 LSB

± 2 LSB

± 1 LSB

± 1 LSB

± 1/2 LSB

± 1/2 LSB

± 1/2 LSB

± 1/2 LSB

± 20 LSB

± 20 LSB

± 20 LSB

± 10 LSB

± 10 LSB

± 10 LSB

± 5 LSB

± 5 LSB

± 5 LSB

± 1 LSB

± 1 LSB

± 1 LSB

± 20 LSB

± 20 LSB

± 10 LSB

± 10 LSB

± 5 LSB

± 5 LSB

± 1 LSB

± 1 LSB

N-20

Q-20

Q-20

N-20

Q-20

Q-20

N-20

Q-20

Q-20

N-20

Q-20

Q-20

P-20A

E-20A

P-20A

E-20A

P-20A

E-20A

P-20A

E-20A

NOTES

1Analog Devices reserves the right to ship either ceramic (D-20) in lieu of cerdip

packages (Q-20).

2To order MIL-STD-883, Class B process parts, add /883B to part number.

Contact local sales office for military data sheet. For U.S. Standard Military

DRAWING (SMD) see DESC drawing 5962-87702.

3E = Leadless Ceramic Chip Carrier; N = Plastic DIP; P = Plastic Leaded Chip

Carrier; Q = Cerdip.

REV. A

–3–

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