LTC2753 Datasheet, PDF (1/24 Pages) Linear Technology – Dual Current Output 12-/14-/16-Bit SoftSpan DACs with Parallel I/O

LTC2753
Dual Current Output
12-/14-/16-Bit SoftSpan
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}
■ _{Parallel Interface with Readback of All Registers}
■ _{Asynchronous CLR Pin Clears DAC Outputs to 0V in}
Any Output Range
■ _{Power-On Reset to 0V}
■ _{48-Pin 7mm × 7mm QFN Package}
APPLICATIONS
■ _{High Resolution Offset and Gain Adjustment}
■ _{Process Control and Industrial Automation}
■ _{Automatic Test Equipment}
■ _{Data Acquisition Systems}
DESCRIPTION
The LTC^®2753 is a family of dual 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 LTC2753A-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 LTC2753 DACs use a bidirectional input/output parallel
interface that allows readback of any on-chip register. A
power-on reset circuit resets the DAC outputs to 0V when
power is initially applied. A logic low on the CLR pin asyn-
chronously 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.
TYPICAL APPLICATION
Dual 16-Bit V_OUT DAC with Software-Selectable Ranges
V_REF
5V
R_OFSA 47
R_IN 2
LTC2753-16
46 R_FBA
1/2 LT1469
150pF
R1
R_COM 1
R2
REFA 48
REFB 39
DAC A
15pF
45 I_OUT1A
4 I_OUT2A
44 R_VOSA
43 R_VOSB
–
1/2 LT1469
+
V_OUTA
32 I_OUT2B
+
DAC B
R_OFSB 40
3
SPAN I/O
16
DATA I/O
I/O PORT
I/O PORT
42 I_OUT1B
15pF
41 R_FBB
1/2 LT1469
–
V_OUTB
2753 TA01
LTC2753-16 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
2753 TA01b
2753f
1