LTC2752 Datasheet, PDF (1/24 Pages) Linear Technology – Dual16-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 _{Glitch Impulse 0.6nV•s (3V), 2.2nV•s (5V)}
n _{Serial Readback of All On-Chip Registers}
n _{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 _{48-Pin 7mm × 7mm LQFP Package}
Applications
n _{High Resolution Offset and Gain Adjustment}
n _{Process Control and Industrial Automation}
n _{Automatic Test Equipment}
n _{Data Acquisition Systems}
LTC2752
Dual16-Bit
SoftSpan I_OUT DACs
Description
The LTC^®2752 is a dual 16-bit multiplying serial-input,
current-output digital-to-analog converter. It operates from
a single 3V to 5V supply and is guaranteed monotonic
over temperature. The LTC2752A provides full 16-bit
performance (±1LSB INL and DNL, max) over temperature
without any adjustments. This SoftSpan™ DAC offers
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.
Any on-chip register (including DAC output-range set-
tings) can be read for verification in just one instruction
cycle; and if you change register content, the altered
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 and
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
Dual 16-Bit V_OUT DAC with Software-Selectable Ranges
REFERENCE
5V
V_DD
SPI with READBACK
GND
DAC A
LTC2752
DAC B
R_FBA
I_OUT1A
–
I_OUT2A
+
V_OSADJA
R_FBB
I_OUT1B
–
I_OUT2B
+
V_OSADJB
V_OUTA
V_OUTB
ALL AMPLIFIERS 1/2 LT1469
REFERENCE
5V
2752 TA01
Integral Nonlinearity (INL)
1.0
±10V RANGE
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152 65535
2752 TA01b
2752f