LTC2614_15 Datasheet, PDF (1/16 Pages) Linear Technology – Quad 16-Bit Rail-to-Rail DACs in 16-Lead SSOP

LTC2604/LTC2614/LTC2624
Quad 16-Bit Rail-to-Rail DACs
in 16-Lead SSOP
FEATURES
n _{Smallest Pin Compatible Quad 16-Bit DAC:}
LTC2604: 16-Bits
LTC2614: 14-Bits
LTC2624: 12-Bits
n _{Guaranteed 16-Bit Monotonic Over Temperature}
n _{Separate Reference Inputs for each DAC}
n _{Wide 2.5V to 5.5V Supply Range}
n _{Low Power Operation: 250μA per DAC at 3V}
n _{Individual DAC Power-Down to 1μA, Max}
n _{Ultralow Crosstalk Between DACs (<5μV)}
n _{High Rail-to-Rail Output Drive (±15mA)}
n _{Double Buffered Digital Inputs}
n _{LTC2604-1/LTC2614-1/LTC2624-1: Power-On Reset}
to Midscale
n _{16-Lead Narrow SSOP Package}
APPLICATIONS
n _{Mobile Communications}
n _{Process Control and Industrial Automation}
n _{Instrumentation}
n _{Automatic Test Equipment}
DESCRIPTION
The LTC^®2604/LTC2614/LTC2624 are quad 16-,14- and
12-bit 2.5V to 5.5V rail-to-rail voltage output DACs in
16-lead narrow SSOP packages. These parts have separate
reference inputs for each DAC. They have built-in high per-
formance output buffers and are guaranteed monotonic.
These parts establish advanced performance standards
for 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. Daisy-chain capability and a hardware CLR
function are included.
The LTC2604/LTC2614/LTC2624 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. The
power-on reset circuit resets the LTC2604-1/LTC2614-1
/LTC2624-1 to midscale. The voltage outputs stay at mid-
scale 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.
BLOCK DIAGRAM
GND
1
REF LO
2
REF A
3
V_OUTA
4
DAC A
V_OUTB
5
REF B
6
CS/LD
7
SCK
8
DAC B
CONTROL
LOGIC
DECODE
32-BIT SHIFT REGISTER
DAC D
V_CC
16
REF D
15
V_{OUT D}
14
DAC C
V_{OUT C}
13
REF C
12
CLR
11
SDO
10
SDI
9
2604 BD
Differential Nonlinearity (LTC2604)
1.0
V_CC = 5V
0.8 V_REF = 4.096V
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152 65535
2604 TA01
2604fd
1