
LTC2600/LTC2610/LTC2620
1
2600fe
BLOCK DIAGRAM
DESCRIPTION
Octal 16-/14-/12-Bit
Rail-to-Rail DACs in 16-Lead SSOP
The LTC
2600/LTC2610/LTC2620 are octal 16-, 14- and
12-bit, 2.5V-to-5.5V rail-to-rail voltage-output DACs in
16-lead narrow SSOP and 20-lead 4mm × 5mm QFN
packages. They have built-in high performance output
buffers and are guaranteed monotonic.
These parts establish new board-density benchmarks for
16-and14-bitDACsandadvanceperformancestandardsfor
output drive, crosstalk and load regulation in single-supply,
voltage-output multiples.
The parts use a simple SPI/MICROWIRE compatible 3-wire
serial interface which can be operated at clock rates up
to 50MHz. Daisychain capability and a hardware CLR
function are included.
The LTC2600/LTC2610/LTC2620 incorporate a power-on
reset circuit. During power-up, the voltage outputs rise less
than 10mV above zero-scale; and after power-up, they stay
at zero-scale until a valid write and update take place.
FEATURES
APPLICATIONS
n Mobile Communications
n Process Control and Industrial Automation
n Instrumentation
n Automatic Test Equipment
n Smallest Pin-Compatible Octal DACs:
LTC2600: 16 Bits
LTC2610: 14 Bits
LTC2620: 12 Bits
n Guaranteed 16-Bit Monotonic Over Temperature
n Wide 2.5V to 5.5V Supply Range
n Low Power Operation: 250μA per DAC at 3V
n Individual Channel Power-Down to 1μA, Max
n Ultralow Crosstalk Between DACs (<10μV)
n High Rail-to-Rail Output Drive (±15mA, Min)
n Double-Buffered Digital Inputs
n Pin-Compatible 10-/8-Bit Versions (LTC1660/LTC1665)
n Tiny 16-Lead Narrow SSOP
and 20-Lead 4mm × 5mm QFN Packages
2
15
1
GND
VOUTA
VOUTB
VOUTC
VOUTD
REF
CS/LD
SCK
VCC
VOUTH
VOUTG
VOUTF
VOUTE
CLR
SDO
SDI
2600 BD
16
DAC A
3
14
4
13
5
7
6
8
(1)
(20)
(2)
(3)
(4)
(7)
(5)
(8)
(16)
(17)
(15)
(14)
(13)
(10)
(11)
(9)
10
11
9
12
DECODE
POWER-ON
RESET
CONTROL
LOGIC
32-BIT SHIFT REGISTER
REGISTER
DAC H
REGISTER
DAC B
REGISTER
DAC G
REGISTER
DAC C
REGISTER
DAC F
REGISTER
DAC D
REGISTER
DAC E
REGISTER
NOTE: NUMBERS IN PARENTHESIS REFER TO THE UFD PACKAGE
Differential Nonlinearity (LTC2600)
CODE
0
16384
32768
49152
65535
DNL
(LSB)
2600 G21
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.