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LTC2755_15 Datasheet, PDF (1/24 Pages) Linear Technology – Quad Current Output 12-/14-/16-Bit SoftSpan DACs with Parallel I/O | |||
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LTC2755
Quad Current Output
12-/14-/16-Bit SoftSpan
DACs with Parallel I/O
FEATURES
â Program or Pin-Strap Six Output Ranges
Unipolar: 0V to 5V, 0V to 10V
Bipolar: ±5V, ±10V, ±2.5V, â2.5V to 7.5V
â Maximum 16-Bit INL Error: ±1 LSB over Temperature
â Low 1μA (Maximum) Supply Current
â Guaranteed Monotonic over Temperature
â Low Glitch Impulse 1nVâ¢s
â 2.7V to 5.5V Single Supply Operation
â 2μs Settling Time to ±1 LSB
â Parallel Interface with Readback of All Registers
â Asynchronous CLR Pin Clears DAC Outputs to 0V in
Any Output Range
â Power-On Reset to 0V
â 64-Pin 9mm à 9mm QFN Package
APPLICATIONS
â High Resolution Offset and Gain Adjustment
â Process Control and Industrial Automation
â Automatic Test Equipment
â Data Acquisition Systems
DESCRIPTION
The LTC®2755 is a family of quad 12-, 14-, and 16-bit
multiplying parallel-input, current-output DACs. These
DACs operate from a single 2.7V to 5.5V supply and are all
guaranteed monotonic over temperature. The LTC2755A-16
provides 16-bit performance (±1LSB INL and DNL) over
temperature without any adjustments. These SoftSpanâ¢
DACs offer six output rangesâtwo unipolar and four
bipolarâthat can be programmed through the parallel
interface, or pinstrapped for operation in a single range.
The LTC2755 DACs use a bidirectional input/output paral-
lel interface that allows readback of any internal register,
including the DAC output span settings. A power-on reset
circuit resets the DAC outputs to 0V when power is initially
applied. A logic low on the CLR pin asynchronously clears
the DACs to 0V in any output range.
The parts are speciï¬ed over commercial and industrial
temperature ranges.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 7034735,
7256721.
TYPICAL APPLICATION
VOUTA
VOUTD
Quad 16-Bit VOUT DAC with Software-Selectable Ranges
VREF1
5V
RVOSA
IOUT2A
IOUT1A
RFBA
SPAN I/O
DATA I/O
RFBD
IOUT1D
IOUT2D
RVOSD
ROFSA
RIN1
DAC A
I/O PORT
I/O PORT
DAC D
+
â
RCOM1
REFA REFB ROFSB
DAC B
LTC2755-16
DAC C
RVOSB
IOUT2B
IOUT1B
RFBB
VDD
RFBC
IOUT1C
IOUT2C
RVOSC
+
â
5V
0.1μF
â
+
GND
MSPAN ROFSD REFD REFC
RCOM2 RIN2 ROFSC 2755 TA01
VREF2
5V
SoftSpan Parallel IOUT DAC Selector Guide
SINGLE DUAL QUAD
Part Number LTC2751 LTC2753 LTC2755
VOUTB
VOUTC
LTC2755-16 Integral Nonlinearity (INL)
1.0
VDD = 5V
0.8 VREF = 5V
0.6 ±10V RANGE
0.4
0.2
0.0
â0.2
â0.4
â0.6
â0.8
â1.0
0
16384
32768
CODE
25°C
90°C
â45°C
49152 65535
2755 TA01b
2755f
1
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