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Philips Semiconductors Linear Products Product specification

NE502010-Bit µP-compatible D/A converter

757

August 31, 1994 853-0392 13721

DESCRIPTION

The NE5020 is a microprocessor-compatible monolithic 10-bit

digital-to-analog converter subsystem. This device offers 10-bit

resolution and ±0.1% accuracy and monotonicity guaranteed over

full operating temperature range.

Low loading latches, adjustable logic thresholds, and addressing

capability allow the NE5020 to directly interface with most

microprocessor- and logic-controlled systems.

The NE5020 contains internal voltage reference, DAC switches and

resistor ladder. Also, the input buffer and output summing amplifier

are included. In addition, the matched application resistors for

scaling either unipolar or bipolar output values are included on a

single monolithic chip.

The result is a near minimum component count 10-bit resolution

DAC system.

FEATURES

• 10-bit resolution

• Guaranteed monotonicity over operating range

• ±0.1% relative accuracy

• Unipolar (0V to +10V) and bipolar (± 5V) output range

• Logic bus compatible

• 5µs settling time

PIN CONFIGURATION

F, N Packages

DIGITAL GND

DB0(LSB)

DB1

DB2

DB3

DB4

DB5

DB6

DB7(MSB)

ANALOG GND

AMP COMP

SUM MODE

BIPOLAR OFFSET R

CC+

OUT

CC–

REF

OUT

–V

REF

ADJ

APPLICATIONS

• Precision 10-bit D/A converters

• 10-bit analog-to-digital converters

• Programmable power supplies

• Test equipment

• Measurement instruments

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

24-Pin Ceramic Dual In-Line Package (CERDIP) 0 to 70°C NE5020F 0588B

24-Pin Plastic Dual In-Line Package (DIP) 0 to 70°C NE5020N 0412A

Summary of content (10 pages)

PAGE 1
Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter NE5020 DESCRIPTION PIN CONFIGURATION The NE5020 is a microprocessor-compatible monolithic 10-bit digital-to-analog converter subsystem. This device offers 10-bit resolution and ±0.1% accuracy and monotonicity guaranteed over full operating temperature range.
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Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter NE5020 BLOCK DIAGRAM (11) DB9 (10) DB8 (9) DB7 (8) DB6 (7) DB5 (6) DB4 (5) DB3 (4) DB2 (3) DB1 (2) DB0 LSB MSB (13) LE2 (12) LE1 LATCHES AND SWITCH DRIVERS SUM (22) NODE Rfb (1) DIGITAL GND (21) +VCC DAC OUTPUT CURRENT VREF (15) OUT DAC SWITCHES R RREF AMP (23) COMP ANALOG (24) GND RBIP QR (18) BIPOLAR OFFSET (16) –VREF IN VOUT (20) VREF VREF (14) ADJ (17) +VREF IN – + INT Q9 Q8
PAGE 3
Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter NE5020 DC ELECTRICAL CHARACTERISTICS VCC+=+15V, VCC-=-15V, 0 ≤ TA≤70°C, unless otherwise specified.1 Typical values are specified at 25°C. SYMBOL PARAMETER TEST CONDITIONS LIMITS Min Typ Resolution Monotonicity Relative accuracy 11.4 -11.4 UNIT 10 10 ±0.1 Bits Bits %FS 16.5 -16.5 V V 0.
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Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter NE5020 DC ELECTRICAL CHARACTERISTICS (Continued) SYMBOL PARAMETER VZS Zero-scale output IOS Output short-circuit current PSR+(OUT) LIMITS TEST CONDITIONS Min Unipolar mode, VREF=5.000V, all bits low, TA=25°C Typ Max -30 UNIT +30 mV TA=25°C VOUT=0V ±15 ±40 mA Output power supply rejection (+) V-=-15V, 13.5V≤V+≤16.5V, external VREF IN=5.000V 0.001 0.
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Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter LE2 LE1 5.000V MSB NE5020 VCC+ LSB LE2 LE1 MSB LSB VCC+ 0.47µF 0.47µF 11 10 9 8 7 6 5 4 3 2 12 13 17 VREF IN 15 VREF OUT 5020 14 11 10 9 8 7 6 5 4 3 2 12 13 17 21 DIG GND 1 ANA GND 24 15 –VREF IN 16 VOUT 20 18 –VREF IN 16 OUTPUT 30pF SUM 22 5k AMP 23 COMP ANA GND 24 VOUT 20 30pF SUM 22 19 5020 14 OUTPUT 21 DIG GND 1 19 18 AMP 23 COMP 5k 100pF 100pF 0.1µF 0.
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Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter NE5020 ÉÉÉÉ ÉÉÉÉ ÉÉÉÉ ÉÉÉÉ ÉÉÉÉ DATA DATA tSLH tPHL 10V 1LSB LE tPLH OUTPUT tPHL 10V 0V LE = LOW OUTPUT 0V Figure 5. Settling Time and Propagation Delay, Low-to-High Data Figure 8. Propagation Delay, Latch Enable to Output DATA ÉÉÉÉÉ ÉÉÉÉÉ ÉÉÉÉÉ ÉÉÉÉÉ ÉÉÉÉÉ tSHL LE tPHL 10V OUTPUT DATA 0V 1LSB LE = LOW ÉÉÉÉ ÉÉÉÉ ÉÉÉÉ ÉÉÉÉ Figure 6.
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Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter TTL, DTL VTH = +1.4V NE5020 PMOS VTH = VPIN1 + 1.4V +15V CMOS, HTL, HNIL VTH = 0V VTH = +7.6V +15V +12V TO +15V NE5020 9.1kΩ 10kΩ IN4148 PIN 1 DIG GND (PIN 1) PIN 1 6.2kΩ 6.2V ZENER PIN 1 0.1µF 10kΩ –5V TO –10V NOTE: DO NOT EXCEED NEGATIVE LOGIC INPUT RANGE OF DAC +5V CMOS +10V CMOS 10k ECL VTH = +2.8V VTH = +9.0V VTH ≥ –1.29V +5V +10V 1.3kΩ 6.2kΩ 3.6kΩ 2N3904 PIN 1 IN4148 PIN 1 0.
PAGE 8
Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter NE5020 B0 DATA BUS B6 B7 DB 9 8 7 6 5 4 3 2 1 0 MSB LSB LATCHES LE2 LE1 LATCHES OUTPUT DAC Figure 11. NE5020 µP Interface 8-Bit Data Bus Example 8-BIT DATA BUS +5V 1 4 10 13 2 74LS74 3 11 12 9 5 LE PRE-LOAD INVERTER 11 10 9 8 7 6 MSB LE LOAD 5 4 3 2 LSB 12 20 13 NE5020 Figure 12.
PAGE 9
Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter NE5020 5k VREF IN (17) + IREF 5k To R-2R Ladder (16) – BIPOLAR OFFSET (18) JUMPER FOR BIPOLAR OPERATION SUM NODE (22) DAC AMP VCC (ID IREF) 5k ID DAC CURRENT FROM CURRENT SWITCHES – + OUTPUT AMP Figure 13.
PAGE 10
Philips Semiconductors Linear Products Product specification 10-Bit µP-compatible D/A converter NE5020 R1 = 20K, 10T POTENTIOMETER VCC –VCC R2 = 1MΩ SUM NODE (22) (OPTIONAL) 5k DAC CURRENT OUTPUT – (20) VOUT CFF + 5k AMP COMP (23) (24) CC Figure 14. Zero-Scale Adjustment + VREF OUT VREF OUT (15) INT REF – 15k R3 = 80k VREF ADJ R3 = 10k 10T POT (14) 5k Figure 15. Reference Adjust Circuit potentiometer R1 until VOUT equals 0.000V in the unipolar mode or –5.