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LTC2601/LTC2611/LTC2621
1
2601fb
TYPICAL APPLICATION
DESCRIPTION
16-/14-/12-Bit Rail-to-Rail
DACs in 10-Lead DFN
The LTC2601/LTC2611/LTC2621 are single 16-, 14- and
12-bit, 2.5V-to-5.5V rail-to-rail voltage output DACs in a
10-lead DFN package. They have built-in high performance
output 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 simple SPI/MICROWIRE compatible 3-wire
serial interface which can be operated at clock rates up to
50MHz. Daisy-chain capability, hardware CLR and asyn-
chronous DAC update (LDAC) pins are included.
The LTC2601/LTC2611/LTC2621 incorporate a power-on
reset circuit. During power-up, the voltage outputs rise
less than 10mV above zero scale until a valid write and
update take place. The power-on reset circuit resets the
LTC2601-1/LTC2611-1/LTC2621-1 to midscale. The volt-
age outputs stay at midscale until a valid write and update
take place.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 5396245.
FEATURES
APPLICATIONS
n Smallest Pin-Compatible Single DACs:
LTC2601: 16 Bits
LTC2611: 14 Bits
LTC2621: 12 Bits
n Guaranteed Monotonic Over Temperature
n Wide 2.5V to 5.5V Supply Range
n Low Power Operation: 300μA at 3V
n Power Down to 1μA, Max
n High Rail-to-Rail Output Drive (±15mA, Min)
n Double-Buffered Data Latches
n Asynchronous DAC Update Pin
n LTC2601-1/LTC2611-1/LTC2621-1: Power-On Reset
to Midscale
n Tiny (3mm
× 3mm) 10-Lead DFN Package
n Mobile Communications
n Process Control and Industrial Automation
n Instrumentation
n Automatic Test Equipment
Differential Nonlinearity (LTC2601)
7
10
1
DAC
REGISTER
INPUT
REGISTER
32-BIT
SHIFT
REGISTER
12-/14-/16-BIT DAC
VOUT
CONTROL
DECODE
LOGIC
LDAC
SDO
2
SDI
SCK
5
CS/LD
9
VCC
6
REF
8
GND
2601 TA01a
4
CLR
3
CODE
0
16384
32768
49152
65535
DNL
(LSB)
2600 TA01b
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
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