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.
■
■
■
■
■
■
■
■
■
■
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
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
15pF
45 I
OUT1A
DAC A
R2
REFA 48
REFB 39
4 I
OUT2A
44 R
VOSA
43 R
VOSB
LTC2753-16 Integral Nonlinearity (INL)
V
DD
= 5V
0.8
V
REF
= 5V
±10V
RANGE
0.6
1.0
+
1/2 LT1469
R1
R
COM
1
–
150pF
INL (LSB)
DAC B
42 I
OUT1B
R
OFSB
40
SPAN I/O
DATA I/O
3
16
I/O PORT
I/O PORT
15pF
41 R
FBB
–
+
32 I
OUT2B
+
1/2 LT1469
V
OUTB
2753 TA01
–
1/2 LT1469
V
OUTA
0.4
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152
25°C
90°C
–45°C
65535
2753 TA01b
2753f
1
LTC2753
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
I
OUT1X
, I
OUT2X
, R
COM
to GND .................................±0.3V
R
VOSX
, R
FBX
, R
OFSX
, R
IN
, REF
X
to GND ...................±15V
V
DD
to GND .................................................. –0.3V to 7V
Digital Inputs and Digital I/O
to GND ..........................–0.3V to V
DD
+0.3V (max 7V)
Operating Temperature Range
LTC2753C..................................................... 0°C to 70°C
LTC2753I .................................................. –40°C to 85°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
REFA
R
OFSA
R
FBA
I
OUT1A
R
VOSA
R
VOSB
I
OUT1B
R
FBB
R
OFSB
REFB
S1
WR
REFA
R
OFSA
R
FBA
I
OUT1A
R
VOSA
R
VOSB
I
OUT1B
R
FBB
R
OFSB
REFB
S1
WR
REFA
R
OFSA
R
FBA
I
OUT1A
R
VOSA
R
VOSB
I
OUT1B
R
FBB
R
OFSB
REFB
S1
WR
48 47 46 45 44 43 42 41 40 39 38 37
36
35
34
33
32
31
30
29
28
27
26
25
UPD
READ
D/S
S0
I
OUT2B
GND
NC
NC
NC
NC
D0
D1
R
COM
R
IN
S2
I
OUT2A
GND
D15
D14
D13
D12
D11
D10
D9
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
UPD
READ
D/S
S0
I
OUT2B
GND
NC
NC
D0
D1
D2
D3
49
13 14 15 16 17 18 19 20 21 22 23 24
D8
D7
V
DD
NC
A1
A0
GND
CLR
MSPAN
D6
D5
D4
LTC2753-16 UK PACKAGE
48-LEAD (7mm × 7mm) PLASTIC QFN
48 47 46 45 44 43 42 41 40 39 38 37
R
COM
R
IN
S2
I
OUT2A
GND
D11
D10
D9
D8
D7
D6
D5
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
UPD
READ
D/S
S0
I
OUT2B
GND
NC
NC
NC
NC
NC
NC
R
COM
R
IN
S2
I
OUT2A
GND
D13
D12
D11
D10
D9
D8
D7
1
2
3
4
5
6
7
8
9
10
11
12
48 47 46 45 44 43 42 41 40 39 38 37
49
49
13 14 15 16 17 18 19 20 21 22 23 24
D4
D3
V
DD
NC
A1
A0
GND
CLR
MSPAN
D2
D1
D0
13 14 15 16 17 18 19 20 21 22 23 24
D6
D5
V
DD
NC
A1
A0
GND
CLR
MSPAN
D4
D3
D2
LTC2753-14 UK PACKAGE
48-LEAD (7mm × 7mm) PLASTIC QFN
LTC2753-12 UK PACKAGE
48-LEAD (7mm × 7mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 29°C/W
EXPOSED PAD (PIN 49) IS GND, MUST BE SOLDERED TO PCB
T
JMAX
= 125°C,
θ
JA
= 29°C/W
EXPOSED PAD (PIN 49) IS GND, MUST BE SOLDERED TO PCB
T
JMAX
= 125°C,
θ
JA
= 29°C/W
EXPOSED PAD (PIN 49) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC2753CUK-12#PBF
LTC2753IUK-12#PBF
LTC2753CUK-14#PBF
LTC2753IUK-14#PBF
LTC2753BCUK-16#PBF
LTC2753BIUK-16#PBF
LTC2753ACUK-16#PBF
LTC2753AIUK-16#PBF
TAPE AND REEL
LTC2753CUK-12#TRPBF
LTC2753IUK-12#TRPBF
LTC2753CUK-14#TRPBF
LTC2753IUK-14#TRPBF
LTC2753BCUK-16#TRPBF
LTC2753BIUK-16#TRPBF
LTC2753ACUK-16#TRPBF
LTC2753AIUK-16#TRPBF
PART MARKING*
LTC2753UK-12
LTC2753UK-12
LTC2753UK-14
LTC2753UK-14
LTC2753UK-16
LTC2753UK-16
LTC2753UK-16
LTC2753UK-16
PACKAGE DESCRIPTION
48-Lead (7mm × 7mm) Plastic QFN
48-Lead (7mm × 7mm) Plastic QFN
48-Lead (7mm × 7mm) Plastic QFN
48-Lead (7mm × 7mm) Plastic QFN
48-Lead (7mm × 7mm) Plastic QFN
48-Lead (7mm × 7mm) Plastic QFN
48-Lead (7mm × 7mm) Plastic QFN
48-Lead (7mm × 7mm) Plastic QFN
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
2753f
2
LTC2753
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
Static Performance
Resolution
Monotonicity
DNL
INL
GE
GE
TC
BZE
BZS
TC
PSR
I
LKG
C
IOUT1
Differential
Nonlinearity
Integral
Nonlinearity
Gain Error
Gain Error Temp-
erature Coefficient
Bipolar Zero Error
Bipolar Zero Temp-
erature Coefficient
Power Supply
Rejection
I
OUT1
Leakage
Current
Output
Capacitance
V
DD
= 5V, ±10%
V
DD
= 3V, ±10%
T
A
= 25°C
T
MIN
to T
MAX
Full-Scale
Zero Scale
●
●
●
●
●
●
V
DD
= 5V, V
REF
= 5V unless otherwise specified. The
●
denotes the
specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
LTC2753-12
CONDITIONS
MIN
12
12
±1
±1
±0.5
±0.6
●
LTC2753-14
MIN
14
14
±1
±1
±1.5
±0.6
±1
±0.6
±0.5
±3
±5
TYP
MAX
LTC2753B-16
MIN
16
16
±1
±2
±20
±0.6
±12
±0.5
TYP
MAX
LTC2753A-16
MIN
16
16
±0.2
±0.4
±4
±0.6
±2
±0.5
±8
±1
±1
±14
TYP
MAX
UNITS
Bits
Bits
LSB
LSB
LSB
ppm/°C
LSB
ppm/°C
LSB/V
nA
pF
pF
TYP
MAX
All Output
Ranges
ΔGain/ΔTemp
All Bipolar
Ranges
●
±2
±0.2
±0.5
±0.025
±0.06
±0.05
±2
±5
±0.05
75
45
±0.1
±0.25
±2
±5
±0.05
75
45
±0.4
±1
±2
±5
±0.03 ±0.2
±0.1 ±0.5
±0.05
75
45
±2
±5
●
75
45
V
DD
= 5V, V
REF
= 5V unless otherwise specified. The
●
denotes specifications that apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C.
SYMBOL
Resistances (Note 3)
R1, R2
R
REF
R
FB
R
OFS
R
VOS
Reference Inverting Resistors
DAC Input Resistance
Feedback Resistor
Bipolar Offset Resistor
Offset Adjust Resistor
Output Settling Time
Glitch Impulse
Digital-to-Analog Glitch Impulse
Multiplying Feedthrough Error
THD
Total Harmonic Distortion
Output Noise Voltage Density
0V to 10V Range, 10V Step. To ±0.0015% FS
(Note 5)
(Note 6)
(Note 7)
0V to 10V Range, V
REF
= ±10V, 10kHz
Sine Wave
(Note 8) Multiplying
(Note 9) at I
OUT1
(Note 3)
(Note 3)
(Note 4)
●
●
●
●
●
PARAMETER
CONDITIONS
MIN
16
8
8
16
800
TYP
20
10
10
20
1000
2
1
1
0.5
–110
13
MAX
UNITS
kΩ
kΩ
kΩ
kΩ
kΩ
μs
nV•s
nV•s
mV
dB
⎯
nV/√H
⎯
z
Dynamic Performance
2753f
3
LTC2753
ELECTRICAL CHARACTERISTICS
SYMBOL
Power Supply
V
DD
I
DD
Digital Inputs
V
IH
V
IL
I
IN
C
IN
Digital Outputs
V
OH
V
OL
I
OH
= 200μA
I
OL
= 200μA
●
●
V
DD
= 5V, V
REF
= 5V unless otherwise specified. The
●
denotes the
specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
PARAMETER
Supply Voltage
Supply Current, V
DD
Digital Input High Voltage
Digital Input Low Voltage
Digital Input Current
Digital Input Capacitance
Digital Inputs = 0V or V
DD
3.3V ≤ V
DD
≤ 5.5V
2.7V ≤ V
DD
< 3.3V
4.5V < V
DD
≤ 5.5V
2.7V ≤ V
DD
≤ 4.5V
V
IN
= GND to V
DD
V
IN
= 0V (Note 10)
CONDITIONS
●
●
MIN
2.7
TYP
MAX
5.5
UNITS
V
μA
V
V
0.5
2.4
2
1
●
●
●
●
●
●
0.8
0.6
±1
6
V
DD
– 0.4
0.4
V
V
μA
pF
V
V
TIMING CHARACTERISTICS
otherwise specifications are at T
A
= 25°C.
SYMBOL
PARAMETER
V
DD
= 4.5V to 5.5V
Write and Update Timing
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
t
9
t
10
t
11
t
12
t
13
t
14
t
15
t
26
t
27
I/O Valid to
WR
Rising Edge Set-Up
I/O Valid to
WR
Rising Edge Hold
WR
Pulse Width Low
UPD Pulse Width High
UPD Falling Edge to
WR
Falling Edge
WR
Rising Edge to UPD Rising Edge
D/S
Valid to
WR
Falling Edge Set-Up Time
WR
Rising Edge to
D/S
Valid Hold Time
A1-A0 Valid to
WR
Falling Edge Setup Time
WR
Rising Edge to A1-A0 Valid Hold Time
A1-A0 Valid to UPD Rising Edge Setup Time
UPD Falling Edge to A1-A0 Valid Hold Time
WR
Rising Edge to READ Rising Edge
READ Falling Edge to
WR
Falling Edge
READ Rising Edge to I/O Propagation Delay
A1-A0 Valid to READ Rising Edge Setup Time
READ Falling to A1-A0 Valid Hold Time
The
●
denotes specifications that apply over the full operating temperature range,
CONDITIONS
MIN
TYP
MAX
UNITS
●
●
●
●
7
7
15
15
0
0
7
7
5
0
9
7
7
20
40
20
0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
No Data Shoot-Through
(Note 10)
●
●
●
●
●
●
●
●
Readback Timing
●
(Note 10)
C
L
= 10pF
(Note 10)
●
●
●
●
2753f
4
LTC2753
TIMING CHARACTERISTICS
otherwise specifications are at T
A
= 25°C.
PARAMETER
UPD Valid to I/O Propagation Delay
D/S
Valid to READ Rising Edge
READ Rising Edge to UPD Rising Edge
UPD Falling Edge to READ Falling Edge
READ Falling Edge to UPD Rising Edge
I/O Bus Hi-Z to READ Rising Edge
READ Falling Edge to I/O Bus Active
CLR
Pulse Width Low
SYMBOL
t
17
t
18
t
19
t
20
t
22
t
23
t
24
CLR
Timing
t
25
●
The
●
denotes specifications that apply over the full operating temperature range,
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