LTC2751 Datasheet, PDF (1/20 Pages) Linear Technology – Current Output 12-/14-/16-Bit SoftSpanTM DACs with Parallel I/O

LTC2751
Current Output
12-/14-/16-Bit SoftSpan^TM
DACs with Parallel I/O
FEATURES
■ _{Six Programmable 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}
■ _{Reference Input: ±15V}
■ _{Parallel Interface with Readback of All Registers}
■ _Asynchronous ⎯_C⎯_L⎯_{R Pin Clears DAC Output to 0V in}
Any Output Range
■ _{Power-On Reset to 0V}
■ _{38-Pin 5mm × 7mm QFN Package}
APPLICATIONS
■ _{High Resolution Offset and Gain Adjustment}
■ _{Process Control and Industrial Automation}
■ _{Automatic Test Equipment}
■ _{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
interface 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 C^⎯ L^⎯ R^⎯ pin asynchronously
clears the DAC 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.
TYPICAL APPLICATION
16-Bit DAC with Software Selectable Ranges
REF
5V
–
1/2 LT^®1469
+
C2
150pF
2
R_IN
R1
WR
UPD
READ
D/S
CLR
31
WR
30
UPD
29
READ
28
D/S
17
CLR
18
MSPAN
1
R_COM
38 37 36
REF R_OFS RFB
R2
LTC2751-16
I_{OUT1 35}
16-BIT DAC WITH SPAN SELECT
I_{OUT2 4}
16
GND
3
3, 32, 33
SPAN I/O
S2-S0
16
6-14, 19-25
DATA I/O
D15-D0
R_VOS
34
15
V_DD
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
2751f
1