Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) PLCC 20

_______________General Description

The MX7534/MX7535 are high-performance, CMOS,

monolithic, 14-bit digital-to-analog converters (DACs).

Wafer-level, laser-trimmed, thin-film resistors and tempera-

ture-compensated NMOS switches assure operation over

the full operating temperature range with exceptional lin-

ear and gain stability.

The MX7534 accepts right-justified data in two bytes from

an 8-bit bus, while the MX7535 operates with a 14-bit data

bus with separate MS-byte and LS-byte select controls. In

addition, all digital inputs are compatible with both TTL and

5V CMOS-logic levels. The MX7534/MX7535 are intended

for unipolar operation, but may be operated as bipolar

DACs with additional external components. Both devices

are protected against CMOS latchup, and neither requires

the use of external Schottky protection diodes.

The MX7534 is available in 20-pin narrow (0.3") DIP, wide

SO, or PLCC packages. The MX7535 is available in

28-pin, 600 mil wide DIP, wide SO, or PLCC packages.

________________________Applications

Machine and Motion Control Systems

Automatic Test Equipment

Digital Audio

µP-Controlled Calibration Circuitry

Programmable-Gain Amplifiers

Digitally Controlled Filters

Programmable Power Supplies

____________________________Features

♦ 14-Bit Monotonic Over Full Temperature Range

♦ Full 4-Quadrant Multiplication

♦ µP-Compatible, Double-Buffered Inputs

♦ Exceptionally Low Gain Tempco (2.5ppm/°C)

♦ Low Output Leakage (<20nA) Over Temp.

♦ Low Power Consumption

♦ TTL and CMOS Compatible

______________Ordering Information

Ordering Information continued at end of data sheet.

Dice are tested at +25°C, DC parameters only.

MX7534/MX7535

Microprocessor-Compatible,

14-Bit DACs

________________________________________________________________

Maxim Integrated Products

MX7534

DAC REGISTER

MS

INPUT

LS

INPUT

7–14

14-BIT DAC

CONTROL

LOGIC

REF

RFB

IOUT

AGNDS

AGNOF

D7–D0 DGND V

Functional diagrams continued at end of data sheet.

_______________Functional Diagrams

_________________Pin Configurations

19-1116; Rev 1; 11/96

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

PART TEMP. RANGE PIN-PACKAGE INL (LSBs)

MX7534KN

0°C to +70°C 20 Plastic DIP ±1

MX7534JN 0°C to +70°C 20 Plastic DIP ±2

MX7534KCWP

0°C to +70°C 20 SO ±1

MX7534JCWP 0°C to +70°C 20 SO ±2

MX7534KP 0°C to +70°C 20 PLCC ±1

MX7534JP 0°C to +70°C 20 PLCC ±2

MX7534J/D 0°C to +70°C Dice* ±2

MX7534BQ -25°C to +85°C 20 CERDIP ±1

MX7534AQ -25°C to +85°C 20 CERDIP ±2

MX7534BD

-25°C to +85°C 20 Ceramic SB ±1

MX7534AD -25°C to +85°C 20 Ceramic SB ±2

MX7534KEWP -40°C to +85°C 20 SO ±1

MX7534JEWP -40°C to +85°C 20 SO ±2

MX7534TQ -55°C to +125°C 20 CERDIP ±1

MX7534SQ -55°C to +125°C 20 CERDIP ±2

MX7534TD -55°C to +125°C 20 Ceramic SB ±1

MX7534SD -55°C to +125°C 20 Ceramic SB ±2

AGNDS

IOUT

RFB

REF

TOP VIEW

DGND

AGNDF

MX7535 at end of data sheet.

DIP/SO/PLCC/Ceramic SB

MX7534

Summary of content (16 pages)

PAGE 1
9-1116; Rev 1; 11/96 Microprocessor-Compatible, 14-Bit DACs ____________________________Features The MX7534/MX7535 are high-performance, CMOS, monolithic, 14-bit digital-to-analog converters (DACs). Wafer-level, laser-trimmed, thin-film resistors and temperature-compensated NMOS switches assure operation over the full operating temperature range with exceptional linear and gain stability.
PAGE 2
MX7534/MX7535 Microprocessor-Compatible, 14-Bit DACs ABSOLUTE MAXIMUM RATINGS VDD to DGND ............................................................-0.3V, +17V VSS to AGND .............................................................-15V, +0.3V REF to AGND (MX7534) ......................................................±25V REFS to AGND (MX7535) ....................................................±25V REFF to AGND (MX7535) ....................................................±25V RFB to AGND...............
PAGE 3
Microprocessor-Compatible, 14-Bit DACs (VDD = +11.4V to +15.75V (Note 1), VREF = 10V, VIOUT = VAGNDS = VSS = 0V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER REQUIREMENTS Positive Supply-Voltage Range VDD For specific performance 11.4 15.
PAGE 4
MX7534/MX7535 Microprocessor-Compatible, 14-Bit DACs TIMING CHARACTERISTICS (MX7534) (VDD = +11.4V to +15.75V, VREF = 10V, VIOUT = VAGND = VSS = 0V, TA = TMIN to TMAX, unless otherwise noted. See Figure 1a for timing diagram.
PAGE 5
Microprocessor-Compatible, 14-Bit DACs PIN NAME FUNCTION __________Pin Description (MX7535) PIN NAME REFS Reference Voltage Sense FUNCTION 1 REF Reference Input to DAC 1 2 RFB Feedback Resistor. Used to close the loop around an external op amp. 2 REFF Reference Voltage Force 3 IOUT Current Output 3 RFB Feedback Resistor. Used to close the loop around an external op amp. 4 IOUT Current Output 4 AGNDS 5 AGNDS Analog Ground Sense. Reference point for external circuitry.
PAGE 6
MX7534/MX7535 Microprocessor-Compatible, 14-Bit DACs t1 t1 t2 5V t2 CSMSB 0V A0,A1 t3 t1 t4 5V t2 0V DATA t5 t6 CS 5V 0V CSLSB t3 LDAC t4 t4 0V 5V WR t7 WR 0V 0V t t5 6 5V 5V 0V 5V t5 t6 DATA 5V 0V NOTES: 1) ALL INPUT-SIGNAL RISE AND FALL TIMES ARE MEASURED FROM 10% TO 90% OF +5V. tR = tF = 20ns. VIH + VIL 2) TIMING MEASUREMENT REFERENCE LEVEL IS 2 NOTES: 1) ALL INPUT-SIGNAL RISE AND FALL TIMES ARE MEASURED FROM 10% TO 90% OF +5V. tR = tF = 20ns.
PAGE 7
Microprocessor-Compatible, 14-Bit DACs 2R REFF* 2R 2R 2R 2R 2R R 2R MX7534/MX7535 R REFS* R 2R 2R 2R 2R R/4 G F E D C B A S10 S9 S0 RFB IOUT AGNDS *NOTE: VALID FOR MX7535. IN MX7534, 0REFS AND 0REFF ARE REPLACED BY ONE PIN: REF. AGNDF Figure 2. Simplified Circuit Diagram Zero-Offset Adjustment (Figures 4a and 4b) R/4 RFB 1) Load the DAC register with all 0s. 2) Adjust the offset of amplifier A1 so that V0 (see figure) is at a minimum (i.e., ≤ 30µV).
PAGE 8
MX7534/MX7535 Microprocessor-Compatible, 14-Bit DACs R1 100Ω VIN A0 A1 CS WR 1 REF 16 R1 20Ω VDD 19 2 RFB R2 33Ω VIN C1 33pF LDAC 3 15 IOUT 18 MX7534 17 D7–D0 DGND 7–14 6 4 AGNDS AGNDF VSS CSMSB A1 WR VO 5 2 1 26 REFF REFS VDD 4 MX7535 24 8–21 Grounding Considerations Since IOUT and the output amplifier noninverting input are sensitive to offset voltages, connect nodes that must be grounded directly to a single-point ground through a separate, very-low-resistance path.
PAGE 9
Microprocessor-Compatible, 14-Bit DACs MX7534/MX7535 VIN VIN A0 A1 CS WR 16 R2, 33Ω VDD R1 100Ω 1 19 REF 2 RFB R5 10k IOUT 18 MX7534 7–14 6 + AGNDS AGNDF D7–D0 DGND VSS 5 R7 20k LDAC 3 15 17 C1 33pF R1 20Ω R6 20k CSMSB A1 R8, 5k,10% 4 + WR A2 VO CSLSB 20 ANALOG GROUND INPUT DATA 23 R2 10Ω VDD 1 26 3 2 REFF REFS RFB 24 IOUT MX7535 + AGNDS AGNDF D13–D0 DGND VSS 6 7 27 8–21 A1 A2 R8, 5k,10% 5 + VO ANALOG GROUND INPUT DATA Figure 5a.
PAGE 10
MX7534/MX7535 Microprocessor-Compatible, 14-Bit DACs VDD VDD R3 100Ω R4 33Ω 1 19 2 REF VDD RFB C1 33pF 3 MX7534 D7–D0 DGND VSS 6 20 7–14 2 1 26 3 REFF REFS VDD RFB 4 VOLTAGE REFERENCE RL VO 4 5 C1 33pF IOUT AGNDS AGNDF R2 10Ω A1 + IOUT VIN R1 20Ω MX7535 + INPUT DATA A1 AGNDS AGNDF D13–D0 DGND VSS 6 7 27 8–21 A2 + RL VO 5 A2 + SIGNAL GROUND INPUT DATA SIGNAL GROUND NOTE: CONTROL INPUTS OMITTED FOR CLARITY. NOTE: CONTROL INPUTS OMITTED FOR CLARITY. Figure 6a.
PAGE 11
Microprocessor-Compatible, 14-Bit DACs + A2 2 1 REFF REFS 26 MX7534/MX7535 V+ VPIN 1 AD544* VDD 3 C1 33pF VDD RFB OUTPUT 4 IOUT MX7535 + AGNDS AGNDF D13–D0 DGND VSS 6 7 27 8–21 C1 LOCATION A1 5 RL V0 REF VSS VDD INPUT DATA PIN 1 MX7534 A3 AGND + DGND NOTE: CONTROL INPUTS OMITTED FOR CLARITY. Figure 7. Driving the MX7535 with a Remote Voltage Reference medium-frequency applications, the OP27 is recommended. For higher-frequency applications, the HA2620 is recommended.
PAGE 12
MX7534/MX7535 Microprocessor-Compatible, 14-Bit DACs MC68000 with MX7535 Figure 11a shows an interface diagram. The following routine writes data to the DAC input registers and then outputs the data via the DAC register: 01000 MOVE.W #W,D0 DAC data, W, loaded into Data Register 0. MOVE.W D0,$E000 Data W transferred between D0 and DAC Register. MOVE.B #228,D7 Control returned to the System.
PAGE 13
Microprocessor-Compatible, 14-Bit DACs MX7534/MX7535 Table 6a. Sample Program for Loading the MX7535 00 02 04 07 0B 0E ASSUME DS:DACLOAD,CS:DACLOAD DACLOAD SEGMENT AT 000 8CC9 MOV CX,CS 8ED9 MOVDS,CX BF00D0 MOVDI,#D000 C705“YZWX” MOV MEM,#YZWX EA0000 00FF :DEFINE DATA SEGMENT REGISTER EQUAL :TO CODE SEGMENT REGISTER :LOAD DI WITH D000 :DAC LOADED WITH WXYZ :CONTROL IS RETURNED TO THE MONITOR PROGRAM Table 6b.
PAGE 14
MX7534/MX7535 Microprocessor-Compatible, 14-Bit DACs ADDRESS BUS ALE 8086 16-BIT LATCH ADDRESS DECODE A1–A23 CS1 CS4 CS3 CS2 WR CSMSB CSLSB LDAC AS ADDRESS BUS ADDRESS DECODE CSMSB CSLSB LDAC MC68000 DTACK WR MX7535* R/W MX7535* AD0–AD15 DATA BUS WR D0–D15 DATA BUS D0–D13 D0–D13 CSMSB CSLSB *SOME CIRCUITRY OMITTED FOR CLARITY Figure 11a.
PAGE 15
Microprocessor-Compatible, 14-Bit DACs CSLSB CSMSB LDAC ADDRESS DECODE MREQ A0–A15 Z80 MREQ A0 A1 CS MX7534* D0–D7 DATA BUS ADDRESS DECODE WR WR D8–D13 D8–D7 ADDRESS BUS Z80 MX7535* WR MX7534/MX7535 ADDRESS BUS A0–A15 WR DATA BUS D0–D7 D0–D7 *SOME CIRCUITRY OMITTED FOR CLARITY *SOME CIRCUITRY OMITTED FOR CLARITY Figure 12a. MX7535—Z80 Interface Figure 12b.
PAGE 16
MX7534/MX7535 Microprocessor-Compatible, 14-Bit DACs ___Functional Diagrams (continued) TOP VIEW VDD 26 1 REFS 2 REFF MX7535 3 4 5 6 23 14-BIT DAC 14 DAC REGISTER 6 MS INPUT REGISTER 8 LS INPUT REGISTER 8–21 D13–D0 24 7 DGND _____Pin Configurations (continued) 28 N.C. REFS 1 RFB IOUT AGNDS AGNDF LDAC REFF 2 27 VSS RFB 3 26 VDD IOUT 4 25 WR AGNDS 5 CSLSB AGNDF 6 22 CSMSB 25 WR DGND 7 (MSB) D13 8 27 VSS _Ordering Information (continued) PART TEMP.