LTC2755 Datasheet, PDF (1/24 Pages) Linear Technology – Quad Current Output 12-/14-/16-Bit SoftSpan DACs with Parallel I/O

LTC2755
Quad Current Output
12-/14-/16-Bit SoftSpan
DACs with Parallel I/O
FEATURES
■ _{Program or Pin-Strap Six Output Ranges}
Unipolar: 0V to 5V, 0V to 10V
Bipolar: ±5V, ±10V, ±2.5V, –2.5V to 7.5V
■ _{Maximum 16-Bit INL Error: ±1 LSB over Temperature}
■ _{Low 1μA (Maximum) Supply Current}
■ _{Guaranteed Monotonic over Temperature}
■ _{Low Glitch Impulse 1nV•s}
■ _{2.7V to 5.5V Single Supply Operation}
■ _{2μs Settling Time to ±1 LSB}
■ _{Parallel Interface with Readback of All Registers}
■ _{Asynchronous CLR Pin Clears DAC Outputs to 0V in}
Any Output Range
■ _{Power-On Reset to 0V}
■ _{64-Pin 9mm × 9mm QFN Package}
APPLICATIONS
■ _{High Resolution Offset and Gain Adjustment}
■ _{Process Control and Industrial Automation}
■ _{Automatic Test Equipment}
■ _{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 SoftSpan™
DACs offer six output ranges—two unipolar and four
bipolar—that 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 specified 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
V_OUTA
V_OUTD
Quad 16-Bit V_OUT DAC with Software-Selectable Ranges
V_REF1
5V
R_VOSA
I_OUT2A
I_OUT1A
R_FBA
SPAN I/O
DATA I/O
R_FBD
I_OUT1D
I_OUT2D
R_VOSD
R_OFSA
R_IN1
DAC A
I/O PORT
I/O PORT
DAC D
+
–
R_COM1
REFA REFB ROFSB
DAC B
LTC2755-16
DAC C
R_VOSB
I_OUT2B
I_OUT1B
R_FBB
V_DD
R_FBC
I_OUT1C
I_OUT2C
R_VOSC
+
–
5V
0.1μF
–
+
GND
MSPAN R_OFSD REFD REFC
R_COM2 R_IN2 R_OFSC ^{2755 TA01}
V_REF2
5V
SoftSpan Parallel I_OUT DAC Selector Guide
SINGLE DUAL QUAD
Part Number LTC2751 LTC2753 LTC2755
V_OUTB
V_OUTC
LTC2755-16 Integral Nonlinearity (INL)
1.0
V_DD = 5V
0.8 V_REF = 5V
0.6 ^{±10V RANGE}
0.4
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
25°C
90°C
–45°C
49152 65535
2755 TA01b
2755f
1