
LTC2609/LTC2619/LTC2629
26091929fb
Block Diagram
Description
Quad 16-/14-/12-Bit
Rail-to-Rail DACs with
I2C Interface
TheLTC2609/LTC2619/LTC2629arequad16-,14-and12-
bit,2.7Vto5.5Vrail-to-railvoltageoutputDACsina16-lead
SSOPpackage.Theyhavebuilt-inhighperformanceoutput
buffers and are guaranteed monotonic.
These parts establish new board-density benchmarks for
16- and 14-bit DACs and advance performance standards
for output drive and load regulation in single-supply, volt-
age-output DACs.
The parts use a 2-wire, I2C compatible serial interface. The
LTC2609/LTC2619/LTC2629 operate in both the standard
mode (clock rate of 100kHz) and the fast mode (clock
rate of 400kHz).
The LTC2609/LTC2619/LTC2629 incorporate a power-on
resetcircuit.Duringpower-up,thevoltageoutputsriseless
than 10mV above zero-scale; after power-up, they stay at
zero-scale until a valid write and update take place. The
power-on reset circuit resets the LTC2609-1/LTC2619-1/
LTC2629-1 to mid-scale. The voltage outputs stay at mid-
scale until a valid write and update take place.
Differential Nonlinearity
(LTC2609)
Features
applications
n
Smallest Pin-Compatible Quad DACs:
LTC2609: 16 Bits
LTC2619: 14 Bits
LTC2629: 12 Bits
n
Guaranteed Monotonic Over Temperature
n
Separate Reference Inputs
n
27 Selectable Addresses
n
400kHz I2C Interface
n
Wide 2.7V to 5.5V Supply Range
n
Low Power Operation: 250A per DAC at 3V
n
Individual Channel Power Down to 1A (Max)
n
High Rail-to-Rail Output Drive (±15mA, Min)
n
Ultralow Crosstalk Between DACs (5V)
n
LTC2609/LTC2619/LTC2629: Power-On Reset to
Zero-Scale
n
LTC2609-1/LTC2619-1/LTC2629-1: Power-On Reset
to Mid-Scale
n
Tiny 16-Lead Narrow SSOP Package
n
Mobile Communications
n
Process Control and Industrial Automation
n
Automatic Test Equipment and Instrumentation
I2C
INTERFACE
ADDRESS
DECODE
LOGIC
32-BIT SHIFT REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
DAC
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
INPUT
REGISTER
SDA
2609 BD
9
REFB
6
SCL
8
VOUTB
5
VOUTA
4
REFA
3
REFLO
2
GND
1
DAC A
DAC B
REFC
12
VOUTC
13
VOUTD
14
CA2
7
CA1
10
CA0
11
REFD
15
VCC
16
DAC D
DAC C
CONTROL
LOGIC
CODE
0
16384
32768
49152
65535
DNL
(LSB)
2609 G02
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
VCC = 5V
VREF = 4.096V
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5396245. Patent pending.