TEXAS INSTRUMENTS DAC7642 Technical data

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DAC7642

DAC7643

SBAS233 – DECEMBER 2001

16-Bit, Dual Voltage Output

DIGITAL-TO-ANALOG CONVERTER

DAC7642
DAC7643

FEATURES

● LOW POWER: 4mW

● UNIPOLAR OR BIPOLAR OPERATION

● SETTLING TIME: 10µs to 0.003% FSR

● 15-BIT LINEARITY AND MONOTONICITY:

–40°C to +85°C

● RESET TO MID-SCALE (DAC7642) OR

ZERO-SCALE (DAC7643)

● DATA READBACK

● DOUBLE-BUFFERED DATA INPUTS

APPLICATIONS

● PROCESS CONTROL

● CLOSED-LOOP SERVO-CONTROL

● MOTOR CONTROL

● DATA ACQUISITION SYSTEMS

● DAC-PER-PIN PROGRAMMERS

V

V

DAC7642
DAC7643

SS

CC

DESCRIPTION

The DAC7642 and DAC7643 are dual channel, 16-bit, volt­age output Digital-to-Analog Converters (DACs) which pro­vide 15-bit monotonic performance over the specified tem­perature range. They accept 16-bit parallel input data, have
double-buffered DAC input logic (allowing simultaneous up­date of all DACs), and provide a readback mode of the
internal input registers. Programmable asynchronous reset
clears all registers to a mid-scale code of 8000
or to a zero-scale code of 0000

(DAC7643). These DACs

H

can operate from a single +5V supply or from +5V and –5V
supplies, providing an output range of 0 to +2.5V or –2.5V to
+2.5V, respectively.

Low power and small size per DAC make the DAC7642 and
DAC7643 ideal for automatic test equipment, DAC-per-pin
programmers, data acquisition systems, and closed-loop
servo-control. The DAC7642 and DAC7643 are available in
a LQFP-32 package and specified over a –40°C to +85°C
temperature range.

V

REF

Sense

L

V

L V

REF

REF

V

REF

Sense

H

H

(DAC7642)

H

16

DATA I/O

DACSEL

CS

R/W

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

I/O

Buffer

Control

Logic

Input

Register A

Input

Register B

GND

RST

DAC

Register A

DAC

Register B

www.ti.com

LOADDACS

DAC A

DAC B

Copyright © 2001, Texas Instruments Incorporated

V

V

V

V

OUT

OUTA

OUT

OUTB

A

Sense

B

Sense

ABSOLUTE MAXIMUM RATINGS

V

to VSS............................................................................. –0.3V to 11V

CC

V

to GND .......................................................................... –0.3V to 5.5V

CC

V

to VSS.............................................................–0.3V to (V

REFL

V

to V

CC

V

REFH

Digital Input Voltage to GND ................................... –0.3V to V

Digital Output Voltage to GND................................. –0.3V to V

Maximum Junction Temperature................................................... +150°C

Operating Temperature Range ........................................–40°C to +85°C

Storage Temperature Range ......................................... –65°C to +125°C

Lead Temperature (soldering, 10s)............................................... +300°C

NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings”
may cause permanent damage to the device. Exposure to absolute maximum
conditions for extended periods may affect device reliability.

H ............................................................ –0.3V to (V

REF

to V

L ......................................................... –0.3V to (V

REF

(1)

ELECTROSTATIC
DISCHARGE SENSITIVITY

– VSS)

CC
CC
CC

+ 0.3V

CC

+ 0.3V

CC

– VSS)
– VSS)

This integrated circuit can be damaged by ESD. Texas Instru­ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.

ESD damage can range from subtle performance
degradation to complete device failure. Precision integrated
circuits may be more susceptible to damage because very
small parametric changes could cause the device not to meet
its published specifications.

PACKAGE/ORDERING INFORMATION

PRODUCT MONOTONICITY PACKAGE-LEAD DESIGNATOR

DAC7642VF 14 Bits LQFP-32 VF –40°C to +85°C DAC7642 DAC7642VFT Tape and Reel, 250

PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT

" """""DAC7642VFR Tape and Reel, 1000

DAC7642VFB

Bits

LQFP-32

VF –40°C to +85°C DAC7642B DAC7642VFB T Tape and Reel, 250

15

" """""DAC7642VFB R Tape and Reel, 1000

DAC7643VF 14 Bits LQFP-32 VF –40°C to +85°C DAC7643 DAC7643VFT Tape and Reel, 250

" """""DAC7643VFR Tape and Reel, 1000

DAC7643VFB 15 Bits LQFP-32 VF –40°C to +85°C DAC7643B DAC7643VFB T Tape and Reel, 250

" """""DAC7643VFB R Tape and Reel, 1000

NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.

(1)

SPECIFIED

RANGE MARKING NUMBER MEDIA, QUANTITY

2

www.ti.com

DAC7642, DAC7643

SBAS233

ELECTRICAL CHARACTERISTICS (Dual Supply)

At TA = T

PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
ACCURACY

Linearity Error ±3 ±4 ±2 ±3 LSB
Linearity Match ±4 ±2 LSB
Differential Linearity Error ±2 ±3 ±1 ±2 LSB
Monotonicity, T
Bipolar Zero Error ±1 ±3 ✻✻ mV
Bipolar Zero Error Drift 5 10 ✻✻ppm/°C
Full-Scale Error ±1 ±3 ✻✻ mV
Full-Scale Error Drift 5 10 ✻✻ppm/°C
Bipolar Zero Matching Channel-to-Channel Matching ±1 ±3 ±1 ±3mV
Full-Scale Matching Channel-to-Channel Matching ±1 ±3 ±1 ±3mV
Power-Supply Rejection Ratio (PSRR)

ANALOG OUTPUT

Voltage Output R
Output Current –1.25 +1.25 ✻✻mA
Maximum Load Capacitance No Oscillation 500 ✻ pF
Short-Circuit Current –10, +30 ✻ mA
Short-Circuit Duration GND, V

REFERENCE INPUT

Ref High Input Voltage Range
Ref Low Input Voltage Range –2.5
Ref High Input Current 500 ✻ µA
Ref Low Input Current –500 ✻ µA

DYNAMIC PERFORMANCE

Settling Time To ±0.003%, 5V Output Step 8 10 ✻✻ µs
Channel-to-Channel Crosstalk See Figure 5 0.5 ✻ LSB
Digital Feedthrough 2 ✻ nV-s
Output Noise Voltage f = 10kHz 60 ✻ nV/√Hz
DAC Glitch

DIGITAL INPUT

V
V
I
I

DIGITAL OUTPUT

V
V

POWER SUPPLY

V
V
I
I
Power 7.5 11.5 ✻✻ mW

TEMPERATURE RANGE

Specified Performance –40 +85 ✻✻°C

✻ Specifications same as DAC7642VF and DAC7643VF.

to T

, V

MIN

MAX

CC

= +5V, VSS = –5V, V

H = +2.5V, and V

REF

L = –2.5V, unless otherwise noted.

REF

DAC7642VF DAC7642VFB
DAC7643VF DAC7643VFB

MIN

to T

MAX

14 15 Bits

At Full-Scale 10 100 ✻✻ppm/V

= 10kΩ V

L

or V

CC

SS

7FFFH to 8000H or 8000H to 7FFF

IH

IL
IH
IL

OH

OL

CC

SS
CC
SS

IOH = –0.8mA 3.6 4.5 ✻✻ V

IOL = 1.2mA 0.3 0.4 ✻✻ V

H

LV

REF

H ✻✻V

REF

Indefinite ✻

V

L + 1.25

REF

+2.5 ✻✻V

V

H – 1.25

REF

✻✻V

40 ✻ nV-s

0.7 • V

CC

0.3 • V

±10 ✻ µA

✻ V

CC

✻ V

±10 ✻ µA

+4.75 +5.0 +5.25 ✻✻✻ V
–5.25 –5.0 –4.75 ✻✻✻ V

0.7 1.1 ✻✻ mA

–1.2 –0.8 ✻✻ mA

DAC7642, DAC7643

SBAS233

www.ti.com

3

ELECTRICAL CHARACTERISTICS (Single Supply)

At TA = T

PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
ACCURACY

Linearity Error
Linearity Match ±4 ±2 LSB
Differential Linearity Error ±2 ±3 ±1 ±2 LSB
Monotonicity, T
Zero-Scale Error ±1 ±3 ✻✻ mV
Zero-Scale Error Drift 5 10 ✻✻ppm/°C
Full-Scale Error ±1 ±3 ✻✻ mV
Full-Scale Error Drift 5 10 ✻✻ppm/°C
Zero-Scale Matching Channel-to-Channel Matching ±1 ±3 ±1 ±3mV
Full-Scale Matching Channel-to-Channel Matching ±1 ±3 ±1 ±3mV
Power-Supply Rejection Ratio (PSRR)

ANALOG OUTPUT

Voltage Output R
Output Current –1.25 +1.25 ✻✻mA
Maximum Load Capacitance No Oscillation 500 ✻ pF
Short-Circuit Current –10, +30 ✻ mA
Short-Circuit Duration GND or V

REFERENCE INPUT

Ref High Input Voltage Range
Ref Low Input Voltage Range 0
Ref High Input Current 250 ✻ µA
Ref Low Input Current –250 ✻ µA

DYNAMIC PERFORMANCE

Settling Time To ±0.003%, 2.5V Output Step 8 10 ✻✻ µs
Channel-to-Channel Crosstalk See Figure 6 0.5 ✻ LSB
Digital Feedthrough 2 ✻ nV-s
Output Noise Voltage, f = 10kHz 60 ✻ nV/√Hz
DAC Glitch

DIGITAL INPUT

V
V
I

IH

I

IL

DIGITAL OUTPUT

V
V

POWER SUPPLY

V
V
I

CC

Power 2.5 4.5 ✻✻ mW

TEMPERATURE RANGE

Specified Performance –40 +85 ✻✻°C

✻ Specifications same as DAC7642VF and DAC7643VF.

NOTE: (1) If V

to T

, V

MIN

MAX

CC

= +5V, VSS = 0V, V

H = +2.5V, and V

REF

L = 0V, unless otherwise noted.

REF

DAC7642VF DAC7642VFB
DAC7643VF DAC7643VFB

(1)

MIN

to T

MAX

14 15 Bits

±3 ±4 ±2 ±3 LSB

At Full-Scale 10 100 ✻✻ppm/V

= 10kΩ 0V

L

CC

V

REF

7FFFH to 8000H or 8000H to 7FFF

IH
IL

H

0.7 • V

Indefinite ✻

L + 1.25

40 ✻ nV-s

CC

H ✻✻V

REF

+2.5 ✻✻V

V

H – 1.25

REF

✻✻V

✻ V

0.3 • V

CC

±10 ✻ µA

✻ V

±10 ✻ µA

OH
OL

CC
SS

= 0V, specification applies at Code 0040H and above due to possible negative zero-scale error.

SS

IOH = –0.8mA 3.6 4.5 ✻✻ V

IOL = 1.2mA 0.3 0.4 ✻✻ V

+4.75 +5.0 +5.25 ✻✻✻ V

000✻✻✻ V

0.5 0.9 ✻✻ mA

4

www.ti.com

DAC7642, DAC7643

SBAS233

PIN CONFIGURATION

Top View LQFP

A
V

32

OUT

A Sense

L Sense

OUT

REF

V

V

31

30

L
V

REF

29

H
V

28

REF

B Sense

H Sense

REF

OUT

V

V

27

26

B
V

OUT

25

DB15
DB14
DB13
DB12
DB11
DB10

PIN DESCRIPTIONS

PIN NAME DESCRIPTION

1V

CC

2 GND Ground

3 DB15 Data Bit 15, MSB

4 DB14 Data Bit 14

5 DB13 Data Bit 13

6 DB12 Data Bit 12

7 DB11 Data Bit 11

8 DB10 Data Bit 10

9 DB9 Data Bit 9

10 DB8 Data Bit 8
11 DB7 Data Bit 7
12 DB6 Data Bit 6
13 DB5 Data Bit 5
14 DB4 Data Bit 4
15 DB3 Data Bit 3
16 DB2 Data Bit 2
17 DB1 Data Bit 1
18 DB0 Data Bit 0, LSB
19 CS Chip Select, Active LOW

Positive Power Supply

V

GND

1

CC

2
3
4
5

DAC7642
DAC7643

6
7
8

9

10

11

12

13

14

15

DB9

DB8

DB7

DB6

DB5

DB4

DB3

16

DB2

24
23
22
21
20
19
18
17

V

SS

DACSEL
RST
LOADDACS
R/W
CS
DB0
DB1

PIN NAME DESCRIPTION

20 R/W Enabled by CS, Controls Data Read from and Write

to the Input Registers.

21 LOADDACS DAC Output Registers Load Control. Rising edge

triggered. Transfers Data from the Input Registers to
the DAC Registers, Updating the DAC Output.

22 RST Reset, Rising Edge Triggered. DAC7642 resets to

mid-scale, DAC7643 resets to zero. (Resets Both
Input Registers and DAC Registers)

23 DACSEL Enabled by CS. Selects the individual DAC Input

Registers. (LOW Selects Register A, HIGH Selects

Register B)
24 V
25 V
26 V

27 V

OUT

REF

28 V
29 V
30 V
31 V

REF

OUT

32 V

SS

OUT

B Sense DAC B Output Amplifier Inverting Input. Used to

H Sense DAC A and B Reference High Sense Input

REF

OUT

L Sense DAC A and B Reference Low Sense Input
A Sense DAC A Output Amplifier Inverting Input. Used to

OUT

Negative Power Supply

B DAC B Voltage Output

close the feedback loop at the load.

H DAC A and B Reference High Input
L DAC A and B Reference Low Input

close the feedback loop at the load.

A DAC A Output Voltage

DAC7642, DAC7643

SBAS233

www.ti.com

5

TYPICAL CHARACTERISTICS: VSS = 0V

At TA = +25°C, VCC = +5V, VSS = 0V, V

REFH

= +2.5V, V

= 0V, representative unit, unless otherwise specified.

REFL

+25°C

2.0

1.5

1.0

0.5

–0.5

LE (LSB)DLE (LSB)

–1.0
–1.5
–2.0

2.0

1.5

1.0

0.5

–0.5
–1.0
–1.5
–2.0

+85°C

2.0

1.5

1.0

0.5

–0.5

LE (LSB)DLE (LSB)

–1.0
–1.5
–2.0

2.0

1.5

1.0

0.5

–0.5
–1.0
–1.5
–2.0

DIFFERENTIAL LINEARITY ERROR vs CODE

LINEARITY ERROR AND

(DAC A, +25°C)

0

0

0000H2000H4000H6000H8000

Digital Input Code

LINEARITY ERROR AND

DIFFERENTIAL LINEARITY ERROR vs CODE

(DAC A, +85°C)

0

0

0000H2000H4000H6000H8000

Digital Input Code

DIFFERENTIAL LINEARITY ERROR vs CODE

LINEARITY ERROR AND

(DAC B, +25°C)

2.0

1.5

1.0

0.5
0

–0.5

LE (LSB)DLE (LSB)

–1.0
–1.5
–2.0

2.0

1.5

1.0

0.5
0

–0.5
–1.0
–1.5

A000

H

C000HE000HFFFF

H

H

–2.0

0000H2000H4000H6000H8000

A000

H

C000HE000HFFFF

H

H

Digital Input Code

LINEARITY ERROR AND

DIFFERENTIAL LINEARITY ERROR vs CODE

(DAC B, +85°C)

2.0

1.5

1.0

0.5
0

–0.5

LE (LSB)DLE (LSB)

–1.0
–1.5
–2.0

2.0

1.5

1.0

0.5
0

–0.5
–1.0
–1.5

C000HE000HFFFF

A000

H

H

H

–2.0

0000H2000H4000H6000H8000

C000HE000HFFFF

A000

H

H

H

Digital Input Code

–40°C

2.0

1.5

1.0

0.5

–0.5

LE (LSB)DLE (LSB)

–1.0
–1.5
–2.0

2.0

1.5

1.0

0.5

–0.5
–1.0
–1.5
–2.0

6

DIFFERENTIAL LINEARITY ERROR vs CODE

LINEARITY ERROR AND

(DAC A, –40°C)

0

0

0000H2000H4000H6000H8000

Digital Input Code

DIFFERENTIAL LINEARITY ERROR vs CODE

LINEARITY ERROR AND

(DAC B, –40°C)

2.0

1.5

1.0

0.5
0

–0.5

LE (LSB)DLE (LSB)

–1.0
–1.5
–2.0

2.0

1.5

1.0

0.5
0

–0.5
–1.0
–1.5

C000HE000HFFFF

A000

H

H

H

–2.0

0000H2000H4000H6000H8000

C000HE000HFFFF

A000

H

H

H

Digital Input Code

DAC7642, DAC7643

www.ti.com

SBAS233