Texas Instruments TLC7628IN, TLC7628CN, TLC7628CDWR, TLC7628CDW Datasheet

TLC7628C, TLC7628E, TLC7628I

DUAL 8-BIT MULTIPLYING

DIGITAL-TO-ANALOG CONVERTERS

SLAS063A – APRIL 1989 – REVISED MA Y 1995

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

Easy Microprocessor Interface

D

On-Chip Data Latches

D

Digital Inputs Are TTL-Compatible With

10.8-V to 15.75-V Power Supply

D

Monotonic Over the Entire A/D Conversion
Range

D

Fast Control Signaling for Digital Signal
Processor (DSP) Applications Including
Interface With TMS320

D

CMOS Technology

KEY PERFORMANCE SPECIFICATIONS

Resolution
Linearity Error
Power Dissipation
Settling Time
Propagation Delay Time

8 bits

1/2 LSB

20 mW
100 ns

80 ns

description

The TLC7628C, TLC7628E, and TLC7628I are
dual, 8-bit, digital-to-analog converters (DACs)
designed with separate on-chip data latches and
feature exceptionally close DAC-to-DAC
matching. Data is transferred to either of the two
DAC data latches through a common, 8-bit input
port. Control input DACA

/DACB determines
which DAC is loaded. The load cycle of these
devices is similar to the write cycle of a
random-access memory, allowing easy interface
to most popular microprocessor buses and output ports. Segmenting the high-order bits minimizes glitches
during changes in the most significant bits, where glitch impulse is typically the strongest.

The TLC7628C operates from a 10.8-V to 15.75-V power supply and is TTL-compatible over this range. 2- or
4-quadrant multiplying makes these devices a sound choice for many microprocessor-controlled gain-setting
and signal-control applications.

The TLC7628C is characterized for operation from 0°C to 70°C. The TLC7628I is characterized for operation
from –25°C to 85°C. The TLC7628E is characterized for operation from –40°C to 85°C.

AVAILABLE OPTIONS

PACKAGE

T

A

SMALL OUTLINE

PLASTIC DIP

(DW)

PLASTIC CHIP

CARRIER

(FN)

PLASTIC DIP

(N)

0°C to 70°C TLC7628CDW TLC7628CFN TLC7628CN
–25°C to 85°C TLC7628IDW TLC7628IFN TLC7628IN
–40°C to 85°C TLC7628EDW TLC7628EFN TLC7628EN

Copyright  1995, Texas Instruments Incorporated

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.

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.

1
2
3
4
5
6
7
8
9
10

20
19
18
17
16
15
14
13
12
11

AGND

OUTA
RFBA

REFA

DGND

DACA

/DACB

(MSB) DB7

DB6
DB5
DB4

OUTB
RFBB
REFB
V

DD

WR
CS
DB0 (LSB)
DB1
DB2
DB3

DW OR N PACKAGE

(TOP VIEW)

3212019

910111213

4
5
6
7
8

18
17
16
15
14

REFB
V

DD

WR
CS
DB0 (LSB)

REFA

DGND

DACA

/DACB

(MSB) DB7

DB6

FN PACKAGE

(TOP VIEW)

RFBA

OUTA

AGND

DB2

DB1

OUTB

RFBB

DB5

DB4

DB3

TLC7628C, TLC7628E, TLC7628I
DUAL 8-BIT MULTIPLYING
DIGITAL-TO-ANALOG CONVERTERS

SLAS063A – APRIL 1989 – REVISED MA Y 1995

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional block diagram

DACA/DACB

REFB

18

OUTB

20

RFBB

19

AGND

1

OUTA

2

RFBA

3

REFA

4

DACA

Input

Buffer

Logic

Control

DACB

DB0

DB7

CS

WR

15

16

6

Data

Inputs

7

8

9

10

11

12

13

14

8

8

8

8

Latch A

Latch B

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

†

Supply voltage range, V

DD

(to AGND or DGND) –0.3 V to 17 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage between AGND and DGND V

DD

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, V

I

(to DGND) –0.3 V to V

DD

+ 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reference voltage range, V

refA

or V

refB

(to AGND) ±25 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Feedback voltage range, V

RFBA

or V

RFBB

(to AGND) ±25 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range, V

OA

or VOB (to AGND) ±25 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Peak input current 10 µA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T

A

: TLC7628C 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLC7628I –25°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLC7628E –40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Case temperature for 10 seconds, T

C

: FN package 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: DW or N package 260°C. . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

TLC7628C, TLC7628E, TLC7628I

DUAL 8-BIT MULTIPLYING

DIGITAL-TO-ANALOG CONVERTERS

SLAS063A – APRIL 1989 – REVISED MA Y 1995

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

recommended operating conditions

MIN NOM MAX UNIT

Supply voltage, V

DD

10.8 15.75 V

Reference voltage, V

refA

or V

refB

±10 V

High-level input voltage, V

IH

2.4 V

Low-level input voltage, V

IL

0.8 V

CS setup time, t

su(CS)

50 ns

CS hold time, t

h(CS)

(see Figure 1) 0 ns

DAC select setup time, t

su(DAC)

(see Figure 1) 60 ns

DAC select hold time, t

h(DAC)

(see Figure 1) 10 ns

Data bus input setup time t

su(D)

(see Figure 1) 25 ns

Data bus input hold time t

h(D)

(see Figure 1) 10 ns

Pulse duration, WR low, t

w(WR)

(see Figure 1) 50 ns

TLC7628C 0 70

Operating free-air temperature, T

A

TLC7628I –25 85

°C

TLC7628E –40 85

electrical characteristics over recommended ranges of operating free-air temperature and VDD,
V

refA

= V

refB

= 10 V, VOA and VOB at 0 V (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN MAX UNIT

p

Full range 10

IIHHigh-level input current

V

I

=

V

DD

25°C 1

µ

A

p

Full range –10

IILLow-level input current

V

I

=

0

25°C –1

µ

A

Reference input impedance REFA or REFB to
AGND

5 20 kΩ

DAC data latch loaded with 00000000,

Full range ±200

p

OUTA

,

V

refA

= ±10 V

25°C ±50

IkgOutput leakage current

DAC data latch loaded with 00000000,

Full range ±200

nA

OUTB

,

V

refB

= ±10 V

25°C ±50

Input resistance match (REFA to REFB) ±1%

pp

Full range 0.02

DC supply sensitivity ∆gain/∆V

DD

∆V

DD

=

± 5 %

25°C 0.01

%/%

Quiescent All digital inputs at VIHmin or VILmax 2

I

DD

Supply current

p

Full range 0.5

mA

Standb

y

All digital inputs at 0 V or V

DD

25°C 0.1

DB0–DB7 10

C

i

Input capacitance

WR

, CS,

DACA

/DACB

15

pF

p

p

DAC data latches loaded with 00000000 25

p

CoOutput capacitance (OUTA, OUTB)

DAC data latches loaded with 11111111 60

pF