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AM6012

12-Bit multiplying D/A converter

Philips Electronics 

Philips Semiconductors Linear Products

12-Bit multiplying D/A converter

Product specification

AM6012

CMOS, HTL

V+

ECL

20kΩ

“A”

2N3904

20kΩ

2N3904

3kΩ

R

TO PIN 13

VLC

400µA

13kΩ

“A”

2N3904

39kΩ

2N3904

3kΩ

TO PIN 13

VLC

6.2kΩ

–5.2V

NOTE:

1. Set the voltage ‘A’ to the desired logic input switching threshold.

2. Allowable range of logic threshold is typically –5V to +13.5V when operating the DAC on ±15V supplies.

Figure 3. Interfacing Circuits for ECL, CMOS, HTL Logic Inputs

ACCOMMODATING BIPOLAR REFERENCE

BASIC NEGATIVE REFERENCE OPERATION

VREF(+)

IIN RREF

IREF

VIN

14

18 IO

RIN

15

AM6012

IO

19

IREF > PEAK NEGATIVE SWING OF IIN

NOTE:

IREF > Peak negative swing of IIN.

VREF(+) RREF

RREF = R15

R15

14

(OPTIONAL)

VIN

15

HIGH INPUT

IMPEDANCE

AM6012

18 IO

IO

19

VREF MUST BE ABOVE PEAK POSITIVE SWING OF VIN

NOTE:

VREF(+) Must be above peak positive swing of VIN.

VREF(–)

RREF

14

R15 15

AM6012

NOTE:

VREF(* )

IFS [

RREF x 4

RREF sets IFS; R15 is for a bias current cancellation.

18 IO

IO

19

RECOMMENDED FULL-SCALE ADJUSTMENT

CIRCUIT

VREF(+) RREF

RREF = R15

R15

14

(OPTIONAL)

VIN

15

HIGH INPUT

IMPEDANCE

AM6012

18 IO

IO

19

VREF+ MUST BE ABOVE PEAK POSITIVE SWING OF VIN

August 31, 1994

783

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