LTC2751_15 Datasheet, PDF (1/22 Pages) Linear Technology – Current Output 12-/14-/16-Bit SoftSpan DACs with Parallel I/O

LTC2751
Current Output
12-/14-/16-Bit SoftSpan
DACs with Parallel I/O
Features
n _{Six Programmable Output Ranges}
Unipolar: 0V to 5V, 0V to 10V
_{Bipolar: ±5V, ±10V, ±2.5V, –2.5V to 7.5V}
n _{Maximum 16-Bit INL Error: ±1 LSB over Temperature}
n _{Low 1µA (Maximum) Supply Current}
n _{Guaranteed Monotonic over Temperature}
n _{Low Glitch Impulse 1nV • s}
n _{2.7V to 5.5V Single Supply Operation}
n _{2µs Settling Time to ±1 LSB}
n _{Reference Input: ±15V}
n _{Parallel Interface with Readback of All Registers}
n _{Asynchronous CLR Pin Clears DAC Output to 0V in}
Any Output Range
n _{Power-On Reset to 0V}
n _{38-Pin 5mm × 7mm QFN Package}
Applications
n _{High Resolution Offset and Gain Adjustment}
n _{Process Control and Industrial Automation}
n _{Automatic Test Equipment}
n _{Data Acquisition Systems}
Description
The LTC^®2751 is a family of 12-, 14-, and 16-bit multi-
plying parallel-input, current-output DACs. They operate
from a single 2.7V to 5.5V supply. All parts are guaranteed
monotonic over temperature. The LTC2751A-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.
These parts use a bidirectional input/output parallel in-
terface that allows readback of any on-chip register. A
power-on circuit resets the DAC output to 0V when power is
initially applied. A logic low on the CLR pin asynchronously
clears the DAC to 0V in any output range.
The parts are specified over commercial and industrial
temperature ranges.
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.
Typical Application
16-Bit DAC with Software Selectable Ranges
REF
5V
+
1/2 LT^®1469
–
C2
150pF
WR
UPD
READ
D/S
CLR
R_IN
R1
WR
UPD
READ
D/S
CLR
MSPAN
R_COM
REF R_OFS RFB
R2
LTC2751-16
I_OUT1
16-BIT DAC WITH SPAN SELECT
I_OUT2
GND
3
16
R_VOS
V_DD
SPAN I/O
S2-S0
DATA I/O
D15-D0
C1
15pF
–
1/2 LT1469
+
V_OUT
5V
C3
0.1µF
2751 TA01
LTC2751-16 Integral Nonlinearity
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
2751 TA01b
2751fa
1