LTC1821_15 Datasheet, PDF (1/16 Pages) Linear Technology – 16-Bit, Ultra Precise, Fast Settling VOUT DAC

FEATURES
s _{2µs Settling to 0.0015% for 10V Step}
s _{1LSB Max DNL and INL Over Industrial}
Temperature Range
s _{On-Chip 4-Quadrant Resistors Allow Precise 0V to}
10V, 0V to –10V or ±10V Outputs
s _{Low Glitch Impulse: 2nV•s}
s _{Low Noise: 13nV/√Hz}
s _{36-Lead SSOP Package}
s _{Power-On Reset}
s _{Asynchronous Clear Pin}
LTC1821: Reset to Zero Scale
LTC1821-1: Reset to Midscale
U
APPLICATIO S
s _{Process Control and Industrial Automation}
s _{Precision Instrumentation}
s _{Direct Digital Waveform Generation}
s _{Software-Controlled Gain Adjustment}
s _{Automatic Test Equipment}
LTC1821
16-Bit, Ultra Precise,
Fast Settling V_OUT DAC
DESCRIPTIO
The LTC^®1821 is a parallel input 16-bit multiplying voltage
output DAC that operates from analog supply voltages of
±5V up to ±15V. INL and DNL are accurate to 1LSB over the
industrial temperature range in both unipolar 0V to 10V and
bipolar ±10V modes. Precise 16-bit bipolar ±10V outputs are
achieved with on-chip 4-quadrant multiplication resistors.
The LTC1821 is available in a 36-lead SSOP package and is
specified over the industrial temperature range.
The device includes an internal deglitcher circuit that reduces
the glitch impulse to less than 2nV•s (typ). The LTC1821
settles to 1LBS in 2µs with a full-scale 10V step. The
combination of fast, precise settling and ultra low glitch make
the LTC1821 ideal for precision industrial control applica-
tions.
The asynchronous CLR pin resets the LTC1821 to zero scale
and resets the LTC1821-1 to midscale.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
16-Bit, 4-Quadrant Multiplying DAC with a
Minimum of External Components
V_REF
–V_REF
3+
5V
LT^®1468
6
2–
0.1µF
15pF
15pF
10 9
R1
R_COM
8 2 11
REF V_CC R_OFS
12 14
R_FB I_OUT
R1
R2
R_OFS R_FB
–
16
DATA
LTC1821-1
16-BIT DAC
INPUTS
+
3 TO 6,
25 TO 36
WR LD CLR
WR
24 23 7
LD
CLR
DNC* DNC* DNC* NC DGND
18 19 21 22
1
AGNDF AGNDS
17
16
*DO NOT CONNECT
V⁺ 15
13
V_OUT
V^– 20
15V
0.1µF
V_REF
V_OUT =
–V_REF
–15V
0.1µF
1821 TA01
LTC1821/LTC1821-1
Integral Nonlinearity
1.0
0.8
V_REF = 10V
V_OUT = ±10V BIPOLAR
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384 32768 49152
DIGITAL INPUT CODE
65535
1821 TA02
1