TEXAS INSTRUMENTS DAC7632 Technical data

D

A

C763

2

SBAS234 – FEBRUARY 2002

16-Bit, Dual Voltage Output

DIGITAL-TO-ANALOG CONVERTER

DAC7632

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

● PROGRAMMABLE RESET TO MID-SCALE

OR ZERO-SCALE

● DOUBLE-BUFFERED DATA INPUTS

APPLICATIONS

● PROCESS CONTROL

● CLOSED-LOOP SERVO-CONTROL

● MOTOR CONTROL

● DATA ACQUISITION SYSTEMS

● DAC-PER-PIN PROGRAMMERS

V

V

DAC7632

V

DD

CC

SS

DESCRIPTION

The DAC7632 is a 16-bit, dual channel, voltage output,
Digital-to-Analog Converter (DAC) which provides 15-bit
monotonic performance over the specified temperature range.
The device accepts 24-bit serial input data, has double­buffered DAC input logic (allowing simultaneous update of
both DACs), and provides a serial data output for daisy­chaining multiple devices. A programmable asynchronous
reset clears all registers to a mid-scale code of 8000
a zero-scale code of 0000

. The DAC7632 can operate from

H

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

Low power and small size per DAC make the DAC7632
ideal for industrial process control, data acquisition sys­tems, and closed-loop servo-control. The DAC7632 is avail­able in an LQFP-32 package and specified over a –40°C to
+85°C temperature range.

V

V

REF

Sense

L

V

REF

L V

REF

H

REF

Sense

H

or to

H

SDI

SDO

CS
CLK
RST

RSTSEL

LDAC
LOAD

Shift

Register

Control

Logic

Input

Register A

Input

Register B

AGND DGND

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.

DAC

Register A

DAC

Register B

www.ti.com

DAC A

DAC B

Copyright © 2002, Texas Instruments Incorporated

V

V

V

V

OUT

OUTA

OUT

OUTB

A

Sense

B

Sense

ABSOLUTE MAXIMUM RATINGS

V

and V

CC

V

CC

V

REFL

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.

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

DD

and V

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

DD

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

to V

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

REF

to V

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

REF

(1)

ELECTROSTATIC
DISCHARGE SENSITIVITY

– VSS)

CC
CC
CC

+ 0.3V

DD

+ 0.3V

DD

– 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

DAC7632VF 14 Bits LQFP-32 VF –40°C to +85°C DAC7632 DAC7632VFT Tape and Reel, 250

PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT

" """""DAC7632VFR Tape and Reel, 1000

DAC7632VFB

15 Bits LQFP-32

VF –40°C to +85°C DAC7632B DAC7632VFB T Tape and Reel, 250

" """""DAC7632VFB R Tape and Reel, 1000

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

SPECIFIED

(1)

RANGE MARKING NUMBER MEDIA, QUANTITY

2

www.ti.com

DAC7632

SBAS234

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 ✻✻ mV
Full-Scale Matching Channel-to-Channel Matching ±1 ±3 ✻✻ mV
Power-Supply Rejection Ratio (PSRR)

ANALOG OUTPUT

Voltage Output
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 –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 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
V
I
I
I
Power 7.5 11.5 ✻✻ mW

TEMPERATURE RANGE

Specified Performance –40 +85 ✻✻°C

✻ Specifications same as DAC7632VF.

to T

MIN

MAX

, VDD = V

= +5V, VSS = –5V, V

CC

H = +2.5V, and V

REF

L = –2.5V, unless otherwise noted.

REF

DAC7632VF DAC7632VFB

MIN

to T

MAX

14 15 Bits

At Full Scale 10 100 ✻✻ppm/V

RL = 10kΩ

or V

CC

SS

7FFFH to 8000H or 8000H to 7FFF

IH

IL
IH
IL

OH

OL

DD

CC

SS
CC
DD
SS

IOH = –0.8mA 3.6 4.5 ✻✻ V

IOL = 1.6mA 0.3 0.4 ✻✻ V

V

LV

REF

H ✻✻V

REF

Indefinite ✻

V

H

L + 1.25

REF

0.7 • V

40 ✻ nV-s

DD

+2.5 ✻✻V

V

H – 1.25

REF

✻✻V

✻ V

0.3 • V

DD

±10 ✻ µA

✻ V

±10 ✻ µA

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

0.7 1.1 ✻✻ mA
50 ✻ µA

–1.2 –0.8 ✻✻ mA

DAC7632

SBAS234

www.ti.com

3

SPECIFICATIONS (Dual Supply)

At TA = T

PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
ACCURACY

Linearity Error
Linearity Match ±4 ±2LSB
Differential Linearity Error ±2 ±3 ±1 ±2LSB
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 ✻✻ mV
Full-Scale Matching Channel-to-Channel Matching ±1 ±3 ✻✻ mV
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 –2.5
Ref High Input Current 250 ✻ µA
Ref Low Input Current –250 ✻ µA

DYNAMIC PERFORMANCE

Settling Time To ±0.003%, 5V Output Step 8 10 ✻✻ µs
Channel-to-Channel Crosstalk 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
V
I

CC

I

DD

Power 2.5 4.5 ✻✻ mW

TEMPERATURE RANGE

Specified Performance –40 +85 ✻✻°C

✻ Specifications same as DAC7632VF.

NOTE: (1) If V

to T

MIN

, VDD = V

MAX

= +5V, VSS = 0V, V

CC

H = +2.5V, and V

REF

L = 0V, unless otherwise noted.

REF

DAC7632VF DAC7632VFB

(1)

MIN

to T

MAX

14 15 Bits

±3 ±4 ±2 ±3LSB

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

DD

H ✻✻V

REF

+2.5 ✻✻V

V

H – 1.25

REF

✻✻V

✻ V

0.3 • V

DD

±10 ✻ µA

✻ V

±10 ✻ µA

OH
OL

DD
CC
SS

IOH = –0.8mA 3.6 4.5 ✻✻ V

IOL = 1.6mA 0.3 0.4 ✻✻ V

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

000✻✻✻ V

0.5 0.9 ✻✻ mA
50 ✻ µA

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

SS

4

www.ti.com

DAC7632

SBAS234

PIN CONFIGURATION

Top View SSOP

A
V

OUT

32

A Sense

L Sense

OUT

V

V

31

30

REF

L
V

REF

29

H
V

28

REF

B Sense

H Sense

REF

OUT

V

V

27

26

B
V

OUT

25

1

V

CC

NC

V

SDO

2
3
4
5
6
7

DD

8

9

10

NC

NC

AGND
AGND

DGND
DGND

NC = No Connection

PIN DESCRIPTIONS

PIN NAME DESCRIPTION

1VCCAnalog +5V Power Supply

2, 3 AGND Analog Ground

4 NC No Connection

5, 6 DGND Digital Ground

7VDDDigital +5V Power Supply
8 SDO Serial Data Output

9-16 NC No Connection

17 CLK Data Clock Input
18 SDI Serial Data Input
19 CS Chip Select, Active LOW
20 RSTSEL Reset Select. Determines the action of RST. If

21 RST Reset, Rising Edge Triggered. Depending on the

HIGH, a RST common will set the DAC registers
to mid-scale code (8000
command will set the DAC registers to zero-scale
code (0000

).

H

). If LOW, a RST

H

state of RSTSEL, the DAC registers are set to
either mid-scale code or zero-scale code.

DAC7632

11

NC

24

V

SS

23

LOAD

22

LDAC

21

RST

20

RSTSEL

19

CS

18

SDI

17

CLK

12

13

14

15

16

NC

NC

NC

NC

NC

PIN NAME DESCRIPTION

22 LDAC DAC Register Load Control, Rising Edge

Triggered
23 LOAD DAC Input Register Load Control, Active LOW
24 V
25 V
26 V

27 V

OUT

REF

28 V
29 V
30 V
31 V

REF

REF

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

REF

L Sense DAC A and B Reference Low Sense Input

A Sense DAC A Output Amplifier Inverting Input. Used to

OUT

Analog –5V Power Supply (or 0V for Single Supply)

B DAC B Output Voltage

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

DAC7632

SBAS234

www.ti.com

5

TYPICAL CHARACTERISTICS: VSS = 0V

At TA = +25°C, VDD = VCC = +5V, VSS = 0V, V

REFH

= +2.5V, V

= 0V, representative unit, unless otherwise specified.

REFL

+25°C

DIFFERENTIAL LINEARITY ERROR vs CODE

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
–2.0

0000H2000H4000H6000H8000

+85°C

DIFFERENTIAL LINEARITY ERROR vs CODE

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
–2.0

0000H2000H4000H6000H8000

LINEARITY ERROR AND

(DAC A, +25°C)

A000

H

H

Digital Input Code

LINEARITY ERROR AND

(DAC A, +85°C)

A000

H

H

Digital Input Code

C000HE000HFFFF

C000HE000HFFFF

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
–2.0

H

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
–2.0

H

0000H2000H4000H6000H8000

A000

H

C000HE000HFFFF

H

H

Digital Input Code

–40°C

DIFFERENTIAL LINEARITY ERROR vs CODE

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
–2.0

0000H2000H4000H6000H8000

6

LINEARITY ERROR AND

(DAC A, –40°C)

A000

H

H

Digital Input Code

C000HE000HFFFF

H

www.ti.com

DIFFERENTIAL LINEARITY ERROR vs CODE

LINEARITY ERROR AND

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
–2.0

0000H2000H4000H6000H8000

(DAC B, –40°C)

A000

H

Digital Input Code

C000HE000HFFFF

H

DAC7632

SBAS234

H

TYPICAL CHARACTERISTICS: VSS = 0V (Cont.)

1.0

0.8

0.6

0.4

0.2

0.0

Digital Input Code

0000H2000H4000H6000H8000HA000HC000HE000HFFFF

H

ANALOG SUPPLY CURRENT vs DIGITAL INPUT CODE

I

CC

(mA)

All DACs

No Load

FULL-SCALE ERROR vs TEMPERATURE

Full-Scale Error (mV)

DAC B

DAC A

3

2

1

0

–1

–2

–3

Temperature (°C)

–40 –15 8510 35 60

Code (FFFFH)

At TA = +25°C, VDD = VCC = +5V, VSS = 0V, V

REFH

= +2.5V, V

= 0V, representative unit, unless otherwise specified.

REFL

3

Code (0040H)

2

1

0

–1

Zero-Scale Error (mV)

–2

–3

–40 –15 8510 35 60

Temperature (°C)

ZERO-SCALE ERROR vs TEMPERATURE

V

H CURRENT vs CODE

REF

(all DACs sent to indicated code)

0.30

0.25

0.20

0.15

Current (mA)

0.10

REF

V

0.05

DAC B

DAC A

0.00

–0.05

–0.10

–0.15

Current (mA)

–0.20

REF

V

–0.25

V

L CURRENT vs CODE

REF

(all DACs sent to indicated code)

0.00
0000H2000H4000H6000H8000

Digital Input Code

ANALOG SUPPLY CURRENT vs TEMPERATURE

1

Data = FFFFH (all DACs)

No Load

0.8

0.6

(mA)

CC

I

0.4

0.2

0

–40 –15 10 35 60 85

Temperature (°C)

DAC7632

SBAS234

A000HC000HE000HFFFF

H

H

www.ti.com

–0.30

0000H2000H4000H6000H8000

A000HC000HE000HFFFF

H

Digital Input Code

H

7