LTC2754_15 Datasheet, PDF (1/28 Pages) Linear Technology – Quad 12-/16-Bit SoftSpan IOUT DACs

FEATURES
n _{Program or Pin-Strap Six Output Ranges}
0V to 5V, 0V to 10V, –2.5V to 7.5V, ±2.5V, ±5V, ±10V
n _{Maximum 16-Bit INL Error: ±1 LSB over}
Temperature
n _{Guaranteed Monotonic over Temperature}
n _{Low Glitch Impulse 0.26nV•s (3V), 1.25nV•s (5V)}
n _{Serial Readback of All On-Chip Registers}
n _{Low 1μA Maximum Supply Current}
n _{2.7V to 5.5V Single-Supply Operation}
n _{16-Bit Settling Time: 2μs}
n _{Voltage-Controlled Offset and Gain Trims}
n _{Clear and Power-On-Reset to 0V Regardless of}
Output Range
n _{52-Pin 7mm × 8mm QFN Package}
APPLICATIONS
■ _{High Resolution Offset and Gain Adjustment}
■ _{Process Control and Industrial Automation}
■ _{Automatic Test Equipment}
■ _{Data Acquisition Systems}
LTC2754
Quad 12-/16-Bit
SoftSpan I_OUT DACs
DESCRIPTION
The LTC^®2754 is a family of quad 12- and 16-bit multiplying
serial-input, current-output digital-to-analog converters.
They operate from a single 3V to 5V supply and are guar-
anteed monotonic over temperature. The LTC2754A-16
provides full 16-bit performance (±1LSB INL and DNL,
max) over temperature without any adjustments. These
SoftSpan™ DACs offer six output ranges (up to ±10V) that
can be programmed through the 3-wire SPI serial interface,
or pinstrapped for operation in a single range.
The content of any on-chip register (including DAC out-
put-range settings) can be verified in just one instruction
cycle; and if you change any register, that register will be
automatically read back during the next instruction cycle.
Voltage-controlled offset and gain adjustments are also
provided; and the power-on reset circuit and CLR pin both
reset the DAC outputs to 0V regardless of output range.
L, LT, LTC, LTM, Linear Technology and the Linear logo 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 5481178.
TYPICAL APPLICATION
Quad 16-Bit V_OUT DAC with Software-Selectable Ranges
V_REFA
+
–
V_REFB
V_DD
V_OUTA
V_OSADJA
I_OUT2A
I_OUT1A
R_FBA
SPI with READBACK
R_FBD
I_OUT1D
V_OUTD
I_OUT2D
V_OSADJD
DAC A
DAC D
LTC2754-16
DAC B
DAC C
V_OSADJB
I_OUT2B
+
I_OUT1B
–
R_FBB
R_FBC
I_OUT1C
–
I_OUT2C
+
V_OSADJC
V_OUTB
V_OUTC
–
+
ALL AMPLIFIERS 1/2 LT1469
V_REFD
V_REFC
2754 TA01
LTC2754-16 Integral
Nonlinearity (INL)
1.0
0.8
V_DD = 5V
V_REF = 5V
0.6 ^{±10V RANGE}
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152
65535
2754 G01
2754f
1