Datasheet mc3410x DATASHEETS (Philips)

Philips Semiconductors Linear Products Product specification

MC3410,

MC3410C

10-Bit high-speed multiplying D/A converter

743

August 31, 1994 853-0936 13721

DESCRIPTION

The MC3410 series are 10-bit Multiplying Digital-to-Analog Converters. They are capable of high-speed performance, and are used as general-purpose building blocks in cost-effective D/A systems.

The Philips Semiconductors design provides complete 10-bit accuracy without laser trimming, and guaranteed monotonicity over temperature. Segmented current sources, in conjunction with an R-2R DAC provides the binary weighted currents. The output buffer amplifier and voltage reference have been omitted to allow greater speed, lower cost, and maximum user flexibility.

FEATURES

•10-bit resolution and accuracy (±0.05%)

•Guaranteed monotonicity over temperature

•Fast settling time—250ns typical

•Digital inputs are TTL and CMOS compatible

•Wide output voltage compliance range

•High-speed multiplying input slew rate—20mA/µs

•Reference amplifier internally-compensated

•Standard supply voltages +5V and -15V

APPLICATIONS

•Successive approximation A/D converters

•High-speed, automatic test equipment

•High-speed modems

•Waveform generators

•CRT displays

•Strip CHART and X-Y plotters

•Programmable power supplies

•Programmable gain and attenuation

PIN CONFIGURATION

1 2 3 4 5 6 7 8

11

12

13

14

16 15

9

10

V

EE

GND

OUTPUT

D1 MSB

D

2

D

3

D

4

D

5

V

REF +

V

REF –

V

CC

D10 (LSB) D

9

D

8

D

7

D

6

TOP VIEW

F Package

BLOCK DIAGRAM

CURRENT SWITCHES

LADDER TERMINATORS

4

567

8 9

10 111213

D

1D2D3D4D5D6D7D8D9D10

I

0

3

R–2R LADDER

V

REF

(+)

V

REF

(–)

16

15

REFERENCE

CURRENT

AMPLIFIER

1

V

EE

GND

BIAS

CIRCUITRY

14

2

V

CC

MSB LSB

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

16-Pin Ceramic Dual In-Line Package (CERDIP) 0 to +70°C MC3410F 0582B 16-Pin Ceramic Dual In-Line Package (CERDIP) 0 to +70°C MC3410CF 0582B

Philips Semiconductors Linear Products Product specification

MC3410,

MC3410C

10-Bit high-speed multiplying D/A converter

August 31, 1994

744

ABSOLUTE MAXIMUM RATINGS

TA=+25°C unless otherwise noted

SYMBOL

PARAMETER RATING UNIT

V

CC

Power supply +7.0 V

DC

V

EE

-18 V

DC

V

I

Digital input voltage +15 V

DC

V

O

Applied output voltage 0.5, -5.0 V

DC

I

REF(16)

Reference current 2.5 mA

V

REF

Reference amplifier inputs VCC, V

EE

V

DC

V

REF(D)

Reference amplifier differential inputs 0.7 V

DC

T

A

Operating ambient temperature range

MC3410, 3410C

0 to +70 °C

T

J

Junction temperature, ceramic package

+150 °C

P

D

Maximum power dissipation, TA=25°C (still-air)

1

F package 1190 mW

NOTES:

1. Derate above 25°C, at the following rates: F package at 9.5mW/°C

Philips Semiconductors Linear Products Product specification

MC3410,

MC3410C

10-Bit high-speed multiplying D/A converter

August 31, 1994

745

ELECTRICAL CHARACTERISTICS

VCC=+5.0VDC, VEE=-15DC,

V

REF

R16

=2.0mA, all digital inputs at high logic level. MC3410 Series: TA=0°C to +70°C, unless otherwise noted.

TEST CONDI-

MC3410 MC3410C

SYMBOL

PARAMETER

TEST CONDI-

TIONS

Min Typ Max Min Typ Max

UNIT

TA=25°C ±0.05 ±0.1 %

E

r

Relative accuracy (error relative to full-scale I

O

)

1/4 1/2 LSB

TCE

r

Relative accuracy drift (relative to full-scale I

O

)

2.5 2.5 ppm/°C

Monotonicity Over temperature 10 10 Bits

t

S

Settling time to within ± LSB (all bits LOW-to-HIGH)

TA=25°C 250 250 ns

t

PLH

t

PHL

Propagation delay time TA=25°C

35 20

ns

TCI

O

Output full scale current drift 60 70 ppm/°C

V

IH

Digital input logic levels (all bits)

HIGH-level, Logic “1” LOW-level, Logic “0”

2.0

0.8

2.0

0.8

V

DC

I

IH

I

IL

Digital input current (all bits)

HIGH-level, V

IH

=5.5V

LOW-level, V

IL

=0.8V -0.05

+.04

-0.4

-0.05

+.04

-0.4

mA

I

REF(15)

Reference input bias current (Pin 15) -1.0 -5.0 -1.0 -5.0 µA

I

OR

Output current range 4.0 5.0 4.0 5.0 mA

I

OH

Output current (all bits high)

V

REF

=2.000V,

R

16

=1000Ω

3.8 3.996 4.2 3.8 3.996 4.2 mA

I

OL

Output current (all bits low) TA=25°C 0 2.0 0 4.0 µA

V

O

Output voltage compliance TA=25°C

-2.5

+0.2

-2.5

+0.2

V

DC

SR I

REF

Reference amplifier slew rate 20 20 mA/µs

ST I

REF

Reference amplifier settling time 0 to 4.0mA, ±0.1% 2.0 2.0 µs PSRR(-) Output current power supply sensitivity 0.003 0.01 0.003 0.02 %/% C

O

Output capacitance VO=0 25 25 pF C

I

Digital input capacitance

(all bits high)

4.0 4.0 pF

I

CC

I

EE

Power supply current

(all bits low)

-11.4

+18

-20

-11.4

+18

-20

mA

V

CC

V

EE

Power supply voltage range TA=25°C +4.75

-14.25

+5.0

-15

+5.25

-15.75

+4.75

-14.25

+5.0

-15

+5.25

-15.75

V

DC

Power consumption

(all bits low) (all bits high)

220 200

380 220

200

380 mW

Relative accuracy

Philips Semiconductors Linear Products Product specification

MC3410,

MC3410C

10-Bit high-speed multiplying D/A converter

August 31, 1994

746

Figure 1. Output Current vs Output Compliance Voltage

4.0

3.0

2.0

1.0

0

–1.0

–5 –3 –1 0 1 3 5

OUTPUT CFURRENT (mA)

VCC = +5.0V V

EE

= -15.0V

T

A

= 25oC

I

REF

= 2mA

COMPLIANCE VOLTAGE (VOLTS)

Figure 2. Maximum Output Compliance

Voltage vs Temperature

4.0

3.0

2.0

1.0 0

–1.0 –2.0

–3.0 –4.0

–75 –50 –25 0 25 50 75 100 125

TA = (oC)

+VCC = +5V –V

EE

= –15V

I

REF

= 2mA

OUTPUT COMPLIANCE VOLTAGE (VOLTS)

Figure 3. Power Supply Current vs Temperature

+VCC = +5V –V

EE

= –15V

I

REF

= 2mA

+I

CC

I

EE

–75 –50 –25 0 25 50 75 100 125

TA (

o

C)

13 12 11

10

4 3

2

1 0

I , POWER SUPPLY CURRENT (mA)

CC

Figure 4. Reference Amplifier Frequency Response

18.0

16.0

14.0

12.0

10.0

8.0

6.0

4.0

2.0 0

–2.0 –4.0 –6.0 –8.0

–10 –12

0.1 0.2 0.3 0.5 1.0 2.0 3.0 5.0 10

SMALL SIGNAL BW

ro = 100

Ω

V

REF

(+) = 50 mV p–p

CENTERED AT + 200mV

RELATIVE OUTPUT (dB)

I, FREQUENCY (MHz)

B CURVE

R15 = R16 = 1.0k V

REF

(–) = 0V

A CURVE

LARGE SIGNAL BW

ro = 200

Ω

V

REF

(+) = 2 Vp–p

CENTERED AT + 1.0V

CIRCUIT DESCRIPTION

The MC3410 consists of four segment current sources which generate the two most significant bits (MSBs), and an R-2R DAC implemented with ion-implanted resistors for scaling the remaining eight least significant bits (LSBs) (See Figure 5). This approach provides complete 10-bit accuracy without trimming.

The individual bit currents are switched ON or OFF by fully differential current switches. The switches use current steering for speed.

An on-chip high-slew reference current amplifier drives the R-2R ladder and segment decoder. The currents are scaled in such a way that, with all bits on, the maximum output current is two times 1023/1024 of the reference amplifier current, or nominally 3.996mA for a 2.000mA reference input current. The reference amplifier allows the user to provide a voltage input. Out-board resistor R

16

(see Figure 6) converts this voltage to a usable current. A current mirror doubles this reference current and feeds it to the segment decoder and resistor ladder. Thus, for a reference voltage of 2.0V and a 1kΩ resistor tied to Pin 16, the full-scale current is approximately 4.0mA. This relationship will remain regardless of the reference voltage polarity.

Connections for a positive reference voltage are shown in Figure 6a. For negative reference voltage inputs, or for bipolar reference voltage inputs in the multiplying mode, R

15

can be tied to a negative voltage corresponding to the minimum input level. For a negative reference input, R

16

should be grounded (Figure 6b). In addition, the

negative voltage reference must be at least 3V above the V

EE

supply voltage for best operation. Bipolar input signals may be handled by connecting R

16

to a positive voltage equal to the peak

positive input level at Pin 15.

Philips Semiconductors Linear Products Product specification

MC3410,

MC3410C

10-Bit high-speed multiplying D/A converter

August 31, 1994

747

When a DC reference voltage is used, capacitive bypass to ground is recommended. The 5V logic supply is not recommended as a reference voltage. If a well regulated 5.0V supply, which drives logic, is to be used as the reference, R

16

should be decoupled by connecting it to the +5.0V logic supply through another resistor and bypassing the junction of the two resistors with a 0.1µF capacitor to ground.

The reference amplifier is internally-compensated with a 10pF feed-forward capacitor, which gives it its high slew rate and fast settling time. Proper phase margin is maintained with all possible values of R

16

and reference voltages which supply 2.0mA reference current into Pin 16. The reference current can also be supplied by a high impedance current source of 2.0mA. As R

16

increases, the bandwidth of the amplifier decreases slightly and settling time increases. For a current source with a dynamic output impedance of

1.0MΩ, the bandwidth of the reference amplifier is approximately half what it is in the case of R

16

=1.0kΩ, and settling time is ≈ 10µs. The reference amplifier phase margin decreases as the current source value decreases in the case of a current source reference, so that the minimum reference current supplied from a current source is 0.5mA for stability.

OUTPUT VOLTAGE COMPLIANCE

The output voltage compliance ranges from -2.5 to +0.2V. As shown in Figure 2, this compliance range is nearly constant over temperature. At the temperature extremes, however, the compliance voltage may be reduced if V

EE

>-15V.

ACCURACY

Absolute accuracy is a measure of each output current level with respect to its intended value. It is dependent upon relative accuracy and full-scale current drift. Relative accuracy, or linearity, is the measure of each output current with respect to its intended fraction of the full-scale current. The relative accuracy of the MC3410 is fairly constant over temperature due to the excellent temperature tracking, of the implanted resistors. The full-scale current from the reference amplifier may drift with temperature causing a change in the absolute accuracy. However, the MC3410 has a low full-scale current drift with temperature.

The MC3410 are accurate to within ±0.05% at 25°C with a reference current of 2.0mA on Pin 16.

Figure 5. MC3410 Equivalent Circuit

CODE SELECTED 0111110011

R

MSB

LSB

(4)

(5) (6) (7) (8) (9) (10) (11) (12)

(13)

GND

(2)

(3)

(INTERNAL)

2R

SEGMENT DECODER

(15)

(16)

+

–

R

2R

R

2R

R

2R

R

2R

R

2R 2R 2R

2R

1

R

1

R

1

R

1

R

1

VEE (1)

V

REF

+

–

V

BIAS

I

OUT

D

1

D

2

D

3

D

4

D

5

D

6

D

7

D

8

D

9

D

10

Philips Semiconductors Linear Products Product specification

MC3410,

MC3410C

10-Bit high-speed multiplying D/A converter

August 31, 1994

748

Figure 6. Basic Connections

a. Positive Reference Voltage

a. Negative Reference Voltage

14

16

15

3

2

1

3410

D

1

THROUGH D

10

VR (+)

V

CC

V

EE

R

T

R

15

R

16

I

O

NOTES:

R

16

+ RT = R15 = R

REF

RT < <R

16

IO F.S. = 2 IR = V

REF/RREF

NOTES:

R

15

+ RT = R

16

RT < <R

15

IV

REF

≥ R

VEE

+ 3V

15

13

2

1

3410

D1 THROUGH D

10

VR (–)

V

EE

R

T

R

15

R

16

I

O

V

CC

MONOTONICITY

The MC3410 and MC3410C are guaranteed monotonic over temperature. This means that for every increase in the input digital code, the output current either remains the same or increases but never decreases. In the multiplying mode, where reference input current will vary, monotonicity can be assured if the reference input current remains above 0.5mA.

SETTLING TIME

The worst-case switching condition occurs when all bits are switched “on,” which corresponds to a low-to-high transition for all bits. This time is typically 250ns for the output to settle to within ±1/2LSB for 10-bit accuracy, and 200ns for 8-bit accuracy. The turn-off time is typically 120ns. These times apply when the output swing is limited to a small (<0.7V) swing and the external output capacitance is under 25pF.

The major carry (MSB off-to-on, all others on-to-off) settles in approximately the same time as when all bits are switched off-to-on.

If a load resistor of 625Ω is connected to ground, allowing the output to swing to -2.5V, the settling time increases to 1.5µs.

Extra care must be taken in board layout as this is usually the dominant factor in satisfactory test results when measuring settling time. Short leads, 100µF supply bypassing, and minimum scope lead length are all necessary.

A typical test setup for measuring settling time is shown in Figure 7. The same setup for the most part can be used to measure the slew rate of the reference amplifier (Figure 9) by tying all data bits high, pulsing the voltage reference input between 0 and 2V , and using a 500Ω load resistor R

L

.

Philips Semiconductors Linear Products Product specification

MC3410,

MC3410C

10-Bit high-speed multiplying D/A converter

August 31, 1994

749

Figure 7. Settling Time

4 5 6 7 8

9 10 11 12 13

14

1

16

15

3

2

1k

50

+2VDC

500

V

CC

V

EE

R

L

V

O

CO ≤ 25pF

V

I

0.1µF

MC3410

2.4V

0.4V

0.5V

0

t

S

— 250ns TYPICAL

TO ± 1/2 LSB

RISE AND FALL TIMES ≤ 10ns

V

O

V

I

USE RL TO GND FOR TURN-OFF MEASUREMENT

FOR SETTLING TIME

MEASUREMENT.

(ALL BIT SWITCHED

LOW TO HIGH)

1.4V

Figure 8. Propagation Delay Time

4 5 6 7 8

9 10 11 12 13

14

1

16

15

3

2

1k

50

+2VDC

20

V

CC

V

EE

R

L

V

O

MC3410

V

I

0.1µF

2.4V

0.4V

–80mV

0V

t

PLH

TO ± 1/2 LSB

RISE AND FALL TIMES ≤ 10ns

V

O

V

I

t

PHL

FOR PROPAGATION

DELAY TIME

Philips Semiconductors Linear Products Product specification

MC3410,

MC3410C

10-Bit high-speed multiplying D/A converter

August 31, 1994

750

Figure 9. Reference Amplifier Settling Time and Slew Rate

TO ±0.1%

4 5 6 7 8 9

10

11 12 13

14

1

16

15

3

2

1k

500

V

CC

V

EE

R

L

V

O

≤ 25pF

MC3410

0.1µF

V

REF

(+)

2V 0

2.0V

0

0.5V

V

O

V

REF

(+)

SLEW RATE

tS = 2µs TYPICAL

NOTE:

Use R

L

= 20Ω to GND for slew rate measurement.

Figure 10. Interfacing 10-Bit DAC With 8-Bit Microprocessor

CONTROL

SIGNAL

7 6 5 4 3 2 1 0

8-BIT

LATCH

LS373

10-BIT

DAC

(MC3410)

2-BIT

LATCH

1/2 LS375

2-BIT

LATCH

1/2 LS375

OUTPUT

FROM µP

µP

D

10

D

9

D

8

D

7

D

6

D

5

D

4

D

3

D

2

D

1

E

0-2

Q

2

Q

0

Q

2

Q

3

E

2-3

BUS

OE

E

2

E

1

DATA

E

2

E

1

D1 - D

2

D3 - D

10