TLV5638
www.ti.com
SLAS225C–JUNE 1999–REVISED JANUARY 2004
2.7-V TO 5.5-V LOW-POWER DUAL 12-BIT DIGITAL-TO-ANALOG CONVERTER WITH
INTERNAL REFERENCE AND POWER DOWN
FEATURES
D, JG PACKAGE
(TOP VIEW)
•
•
•
Dual 12-Bit Voltage Output DAC
Programmable Internal Reference
Programmable Settling Time:
– 1 µs in Fast Mode,
DIN
SCLK
CS
V
DD
1
2
3
4
8
7
6
5
OUTB
REF
– 3.5 µs in Slow Mode
OUTA
AGND
•
Compatible With TMS320 and SPI™ Serial
Ports
•
•
Differential Nonlinearity <0.5 LSB Typ
Monotonic Over Temperature
FK PACKAGE
(TOP VIEW)
APPLICATIONS
•
•
•
•
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Digital Servo Control Loops
Digital Offset and Gain Adjustment
Industrial Process Control
Machine and Motion Control Devices
Mass Storage Devices
3
2
1
20 19
NC
SCLK
NC
NC
4
5
6
7
8
18
17
16
15
14
OUTB
NC
CS
REF
NC
NC
9
10 11 12 13
DESCRIPTION
The TLV5638 is a dual 12-bit voltage output DAC with a flexible 3-wire serial interface. The serial interface allows
glueless interface to TMS320, SPI™, QSPI™, and Microwire™ serial ports. It is programmed with a 16-bit serial
string containing 4 control and 12 data bits.
The resistor string output voltage is buffered by a x2 gain rail-to-rail output buffer. The buffer features a Class AB
output stage to improve stability and reduce settling time. The programmable settling time of the DAC allows the
designer to optimize speed vs power dissipation. With its on-chip programmable precision voltage reference, the
TLV5638 simplifies overall system design.
Because of its ability to source up to 1 mA, the reference can also be used as a system reference. Implemented
with a CMOS process, the device is designed for single supply operation from 2.7 V to 5.5 V. It is available in an
8-pin SOIC package to reduce board space in standard commercial, industrial, and automotive temperature
ranges. It is also available in JG and FK packages in the military temperature range.
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.
SPI, QSPI are trademarks of Motorola, Inc.
Microwire is a trademark of National Semiconductor Corporation.
PRODUCTION DATA information is current as of publication date.
Copyright © 1999–2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.