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LTC1821-1BCGW#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LTC1821
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
TYPICAL APPLICATIO
U
16-Bit, Ultra Precise,
Fast Settling V
OUT
DAC
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.
■
Process Control and Industrial Automation
■
Precision Instrumentation
■
Direct Digital Waveform Generation
■
Software-Controlled Gain Adjustment
■
Automatic Test Equipment
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTC1821/LTC1821-1
Integral Nonlinearity
16-Bit, 4-Quadrant Multiplying DAC with a
Minimum of External Components
DIGITAL INPUT CODE
0
INTEGRAL NONLINEARITY (LSB)
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
16384
32768
1821 TA02
49152
65535
V
REF
= 10V
V
OUT
= ±10V BIPOLAR
V
CC
LTC1821-1
R
FB
I
OUT
R
FB
R
OFS
R
OFS
5V
LD
LD
10 9
3
2
24 23
7
2
6
15pF
17 16
20
13
15
V
–
V
+
R1
R
COM
8
REF
11
12 14
0.1µF
122
V
OUT
15pF
V
OUT
=
1821 TA01
DGNDNC AGNDSAGNDF
–
+
LT
®
1468
WR
3 TO 6,
25 TO 36
WR
CLR
CLR
16-BIT DAC
R1
R2
16
DATA
INPUTS
0.1µF
15V
–15V
0.1µF
–
+
21
DNC*
19
DNC*
18
*DO NOT CONNECT
DNC*
V
REF
–V
REF
V
REF
–V
REF
■
2µs Settling to 0.0015% for 10V Step
■
1LSB Max DNL and INL Over Industrial
Temperature Range
■
On-Chip 4-Quadrant Resistors Allow Precise 0V to
10V, 0V to –10V or ±10V Outputs
■
Low Glitch Impulse: 2nV•s
■
Low Noise: 13nV/√Hz
■
36-Lead SSOP Package
■
Power-On Reset
■
Asynchronous Clear Pin
LTC1821: Reset to Zero Scale
LTC1821-1: Reset to Midscale
2
LTC1821
V
CC
to AGNDF, AGNDS ............................... – 0.3V to 7V
V
CC
to DGND .............................................. –0.3V to 7V
Total Supply Voltage (V
+
to V
–
) ............................... 36V
AGNDF, AGNDS to DGND ............................. V
CC
+ 0.3V
DGND to AGNDF, AGNDS ............................. V
CC
+ 0.3V
REF, R
COM
to AGNDF, AGNDS, DGND .................. ±15V
R
OFS
, R
FB
, R1, to AGNDF, AGNDS, DGND ............ ±15V
Digital Inputs to DGND ............... –0.3V to (V
CC
+ 0.3V)
I
OUT
to AGNDF, AGNDS............... –0.3V to (V
CC
+ 0.3V)
Maximum Junction Temperature .......................... 150°C
Operating Temperature Range
LTC1821C/LTC1821-1C.......................... 0°C to 70°C
LTC1821I/LTC1821-1I ....................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
(Note 1)
ORDER PART
NUMBER
LTC1821ACGW
LTC1821BCGW
LTC1821-1ACGW
LTC1821-1BCGW
LTC1821AIGW
LTC1821BIGW
LTC1821-1AIGW
LTC1821-1BIGW
T
JMAX
= 125°C, θ
JA
= 80°C/W
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TOP VIEW
GW PACKAGE
36-LEAD PLASTIC SSOP WIDE
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
WR
LD
NC
DNC*
V
–
DNC*
DGND
V
CC
D3
D2
D1
D0
CLR
REF
R
COM
R1
R
OFS
R
FB
V
OUT
I
OUT
V
+
AGNDS
AGNDF
DNC*
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= T
MIN
to T
MAX
,
V
+
= 15V, V
–
= –15V, V
CC
= 5V, V
REF
= 10V, AGNDF = AGNDS = DGND = 0V.
*DO NOT CONNECT
LTC1821B/-1B LTC1821A/-1A
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Accuracy
Resolution ● 16 16 Bits
Monotonicity ● 16 16 Bits
INL Integral Nonlinearity T
A
= 25°C (Note 2) ±2 ±0.25 ±1LSB
T
MIN
to T
MAX
● ±2 ±0.35 ±1LSB
DNL Differential Nonlinearity T
A
= 25°C ±1 ±0.2 ±1LSB
T
MIN
to T
MAX
● ±1 ±0.2 ±1LSB
GE Gain Error Unipolar Mode
T
A
= 25°C (Note 3) ±16 ±5 ±16 LSB
T
MIN
to T
MAX
● ±24 ±8 ±16 LSB
Bipolar Mode
T
A
= 25°C (Note 3) ±16 ±2 ±16 LSB
T
MIN
to T
MAX
● ±24 ±5 ±16 LSB
Gain Temperature Coefficient ∆Gain/∆Temperature (Note 4) ● 1 3 1 3 ppm/°C
Unipolar Zero-Scale Error T
A
= 25°C ±3 ±0.25 ±2LSB
T
MIN
to T
MAX
● ±6 ±0.50 ±4LSB
Bipolar Zero Error T
A
= 25°C ±12 ±2 ±8LSB
T
MIN
to T
MAX
● ±16 ±3 ±10 LSB
PSRR Power Supply Rejection Ratio V
CC
= 5V ±10% ● 2 0.7 2 LSB/V
V
+
, V
–
= ±4.5V to ±16.5V ● ±2 ±0.1 ±2 LSB/V
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
ELECTRICAL CHARACTERISTICS
Consult factory for parts specified with wider operating temperature ranges.
3
LTC1821
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= T
MIN
to T
MAX
,
V
+
= 15V, V
–
= –15V, V
CC
= 5V, V
REF
= 10V, AGNDF = AGNDS = DGND = 0V.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference Input
R
REF
DAC Input Resistance (Unipolar) (Note 6) ● 4.5 6 10 kΩ
R1/R2 R1/R2 Resistance (Bipolar) (Notes 6, 11) ● 91220 kΩ
R
OFS
, R
FB
Feedback and Offset Resistances (Note 6) ● 91220 kΩ
AC Performance (Note 4)
Output Voltage Settling Time ∆V
OUT
= 10V (Notes 7, 8) 2 µs
Midscale Glitch Impulse (Note 10) 2 nV•s
Digital-Feedthrough (Note 9) 2 nV•s
Multiplying Feedthrough Error V
REF
= ±10V, 10kHz Sine Wave (Note 7) 1 mV
P-P
Multiplying Bandwidth Code = Full Scale (Note 7) 600 kHz
Output Noise Voltage Density 1kHz to 100kHz (Note 7)
Code = Zero Scale 13 nV/√Hz
Code = Full Scale 20 nV/√Hz
Output Noise Voltage 0.1Hz to 10Hz (Note 7)
Code = Zero Scale 0.45 µV
RMS
Code = Full Scale 1 µV
RMS
1/f Noise Corner (Note 7) 30 Hz
Analog Outputs (Note 4)
V
OUT
DAC Output Swing R
L
= 2k, V
+
= 15V, V
–
= –15V ● ±12.6 V
R
L
= 2k, V
+
= 5V, V
–
= –5V ● ±2.6 V
DAC Output Load Regulation V
+
= 15V, V
–
= –15V, ±5mA Load ● 0.02 0.2 LSB/mA
I
SC
Short-Circuit Current V
OUT
= 0V, V
+
= 15V, V
–
= –15V ● 12 40 mA
SR Slew Rate R
L
= 2k, V
+
= 15V, V
–
= –15V 20 V/µs
R
L
= 2k, V
+
= 5V, V
–
= –5V 14 V/µs
Digital Inputs
V
IH
Digital Input High Voltage ● 2.4 V
V
IL
Digital Input Low Voltage ● 0.8 V
I
IN
Digital Input Current ● 0.001 ±1 µA
C
IN
Digital Input Capacitance (Note 4 ) V
IN
= 0V ● 8pF
Timing Characteristics
t
DS
Data to WR Setup Time ● 60 20 ns
t
DH
Data to WR Hold Time ● 0–12 ns
t
WR
WR Pulse Width ● 60 25 ns
t
LD
LD Pulse Width ● 110 55 ns
t
CLR
Clear Pulse Width ● 60 40 ns
t
LWD
WR to LD Delay Time ● 0ns
Power Supply
I
CC
Supply Current, V
CC
Digital Inputs = 0V or V
CC
● 1.5 10 µA
I
S
Supply Current, V
+
, V
–
±15V ● 4.5 7.0 mA
±5V
● 4.0 6.8 mA
V
CC
Supply Voltage ● 4.5 5 5.5 V
V
+
Supply Voltage ● 4.5 16.5 V
V
–
Supply Voltage ● –16.5 –4.5 V
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LTC1821-1BCGW#PBF

Mfr. #:
Buy LTC1821-1BCGW#PBF
Manufacturer:
Analog Devices Inc.
Description:
Digital to Analog Converters - DAC 16-B, Ultra Precise, Fast Settling VOUT
Lifecycle:
New from this manufacturer.
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