LTC2604/LTC2614/LTC2624
Quad 16-Bit Rail-to-Rail DACs
in 16-Lead SSOP
FEATURES
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DESCRIPTION
The LTC
®
2604/LTC2614/LTC2624 are quad 16-,14- and
12-bit 2.5V to 5.5V rail-to-rail voltage output DACs in
16-lead narrow SSOP packages. These parts have separate
reference inputs for each DAC. They have built-in high per-
formance output buffers and are guaranteed monotonic.
These parts establish advanced performance standards
for output drive, crosstalk and load regulation in single-
supply, voltage output multiples.
The parts use a simple SPI/MICROWIRE compatible
3-wire serial interface which can be operated at clock rates
up to 50MHz. Daisy-chain capability and a hardware
CLR
function are included.
The LTC2604/LTC2614/LTC2624 incorporate a power-on
reset circuit. During power-up, the voltage outputs rise less
than 10mV above zero scale; and after power-up, they stay
at zero scale until a valid write and update take place. The
power-on reset circuit resets the LTC2604-1/LTC2614-1
/LTC2624-1 to midscale. The voltage outputs stay at mid-
scale until a valid write and update take place.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Smallest Pin Compatible Quad 16-Bit DAC:
LTC2604: 16-Bits
LTC2614: 14-Bits
LTC2624: 12-Bits
Guaranteed 16-Bit Monotonic Over Temperature
Separate Reference Inputs for each DAC
Wide 2.5V to 5.5V Supply Range
Low Power Operation: 250μA per DAC at 3V
Individual DAC Power-Down to 1μA, Max
Ultralow Crosstalk Between DACs (<5μV)
High Rail-to-Rail Output Drive (±15mA)
Double Buffered Digital Inputs
LTC2604-1/LTC2614-1/LTC2624-1: Power-On Reset
to Midscale
16-Lead Narrow SSOP Package
APPLICATIONS
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Mobile Communications
Process Control and Industrial Automation
Instrumentation
Automatic Test Equipment
BLOCK DIAGRAM
GND
1
REF LO
2
REF A
3
DAC
REGISTER
INPUT
REGISTER
V
OUTA
4
DAC A
V
CC
16
REF D
15
INPUT
REGISTER
DAC
REGISTER
V
OUT D
DAC D
14
Differential Nonlinearity (LTC2604)
1.0
0.8
0.6
0.4
ERROR (LSB)
V
CC
= 5V
V
REF
= 4.096V
INPUT
REGISTER
DAC
REGISTER
V
OUT C
DAC C
13
REF C
12
CLR
11
0.2
0
–0.2
–0.4
–0.6
–0.8
V
OUTB
5
REF B
6
CS/LD
7
SCK
8
DAC B
DAC
REGISTER
CONTROL
LOGIC
INPUT
REGISTER
DECODE
SDO
10
SDI
9
2604 BD
–1.0
0
16384
32768
CODE
49152
65535
2604 TA01
32-BIT SHIFT REGISTER
2604fd
1
LTC2604/LTC2614/LTC2624
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
GND
REF LO
REF A
V
OUT A
V
OUT B
REF B
CS/LD
SCK
1
2
3
4
5
6
7
8
16 V
CC
15 REF D
14 V
OUT D
13 V
OUT C
12 REF C
11
CLR
10 SDO
9
SDI
Any Pin to GND ............................................ –0.3V to 6V
Any Pin to V
CC
............................................. –6V to 0.3V
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range
LTC2604C/LTC2614C/LTC2624C ............. 0°C to 70°C
LTC2604C-1/LTC2614C-1/
LTC2624C-1 ............................................. 0°C to 70°C
LTC2604I/LTC2614I/LTC2624I .............–40°C to 85°C
LTC2604I-1/LTC2614I-1/
LTC2624I-1 ..........................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
GN PACKAGE
16-LEAD PLASTIC SSOP
T
JMAX
= 125°C,
θ
JA
= 150°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC2604CGN#PBF
LTC2604CGN-1#PBF
LTC2604IGN#PBF
LTC2604IGN-1#PBF
LTC2614CGN#PBF
LTC2614CGN-1#PBF
LTC2614IGN#PBF
LTC2614IGN-1#PBF
LTC2624CGN#PBF
LTC2624CGN-1#PBF
LTC2624IGN#PBF
LTC2624IGN-1#PBF
TAPE AND REEL
LTC2604CGN#TRPBF
LTC2604CGN-1#TRPBF
LTC2604IGN#TRPBF
LTC2604IGN-1#TRPBF
LTC2614CGN#TRPBF
LTC2614CGN-1#TRPBF
LTC2614IGN#TRPBF
LTC2614IGN-1#TRPBF
LTC2624CGN#TRPBF
LTC2624CGN-1#TRPBF
LTC2624IGN#TRPBF
LTC2624IGN-1#TRPBF
PART MARKING
2604
26041
2604I
2604I1
2614
26141
2614I
2614I1
2624
26241
2624I
2624I1
PACKAGE DESCRIPTION
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
16-Lead Narrow SSOP Package
TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
DC Performance
Resolution
Monotonicity
DNL
INL
Integral Nonlinearity
(Note 2)
(Note 2)
Differential Nonlinearity (Note 2)
CONDITIONS
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. REF A = REF B = REF C = REF D = 4.096V (V
CC
= 5V), REF A = REF B =
REF C = REF D = 2.048V (V
CC
= 2.5V), REF LO = 0V, V
OUT
unloaded, unless otherwise noted. (Note 10)
LTC2624/LTC2624-1
MIN
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LTC2614/LTC2614-1
MIN
14
14
TYP
MAX
LTC2604/LTC2604-1
MIN
16
16
TYP
MAX
UNITS
Bits
Bits
±1
±14
±64
LSB
LSB
2604fd
TYP
MAX
12
12
±0.5
±0.9
±4
±1
±4
±16
2
LTC2604/LTC2614/LTC2624
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. REF A = REF B = REF C = REF D = 4.096V (V
CC
= 5V), REF A = REF B =
REF C = REF D = 2.048V (V
CC
= 2.5V), REF LO = 0V, V
OUT
unloaded, unless otherwise noted. (Note 10)
LTC2624/LTC2624-1
SYMBOL PARAMETER
Load Regulation
CONDITIONS
V
REF
= V
CC
= 5V, Midscale
I
OUT
= 0mA to 15mA Sourcing
I
OUT
= 0mA to 15mA Sinking
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ELECTRICAL CHARACTERISTICS
LTC2614/LTC2614-1
MIN
TYP
0.1
0.1
0.2
0.2
1.5
±1.5
±5
MAX
0.5
0.5
1
1
9
±9
LTC2604/LTC2604-1
MIN
TYP
0.3
0.3
0.7
0.7
1.5
±1.5
±5
MAX
2
2
4
4
9
±9
UNITS
LSB/mA
LSB/mA
LSB/mA
LSB/mA
mV
mV
μV/°C
±0.7
%FSR
ppm/°C
MIN
TYP
MAX
0.025 0.125
0.025 0.125
0.05
0.05
1.5
±1.5
±5
0.25
0.25
9
±9
V
REF
= V
CC
= 2.5V, Midscale
I
OUT
= 0mA to 7.5mA Sourcing
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I
OUT
= 0mA to 7.5mA Sinking
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ZSE
V
OS
Zero-Scale Error
Offset Error
V
OS
Temperature
Coefficient
GE
Gain Error
Gain Temperature
Coefficient
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(Note 7)
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±0.1
±5
±0.7
±0.1
±5
±0.7
±0.1
±5
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. REF
A = REF B = REF C = REF D = 4.096V (V
CC
= 5V), REF A = REF B = REF C = REF D = 2.048V (V
CC
= 2.5V), REF LO = 0V, V
OUT
unloaded,
unless otherwise noted. (Note 10)
SYMBOL
PSR
R
OUT
PARAMETER
Power Supply Rejection
DC Output Impedance
DC Crosstalk (Note 4)
CONDITIONS
V
CC
= 5V ±10%
V
CC
= 3V ±10%
V
REF
= V
CC
= 5V, Midscale; –15mA ≤ I
OUT
≤ 15mA
V
REF
= V
CC
= 2.5V, Midscale; –7.5mA ≤ I
OUT
≤ 7.5mA
Due to Full Scale Output Change (Note 5)
Due to Load Current Change
Due to Powering Down (per Channel)
V
CC
= 5.5V, V
REF
= 5.5V
Code: Zero Scale; Forcing Output to V
CC
Code: Full Scale; Forcing Output to GND
V
CC
= 2.5V, V
REF
= 2.5V
Code: Zero Scale; Forcing Output to V
CC
Code: Full Scale; Forcing Output to GND
Reference Input
Input Voltage Range
Resistance
Capacitance
I
REF
Power Supply
V
CC
I
CC
Positive Supply Voltage
Supply Current
For Specified Performance
V
CC
= 5V (Note 3)
V
CC
= 3V (Note 3)
All DACs Powered Down (Note 3) V
CC
= 5V
All DACs Powered Down (Note 3) V
CC
= 3V
V
CC
= 2.5V to 5.5V
V
CC
= 2.5V to 3.6V
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l
l
l
l
l
l
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MIN
TYP
–80
–80
0.025
0.030
±5
±1
±3.5
MAX
UNITS
dB
dB
0.15
0.15
Ω
Ω
μV
μV/mA
μV
I
SC
Short-Circuit Output Current
15
15
7.5
7.5
0
88
34
36
18
24
60
60
50
50
V
CC
mA
mA
mA
mA
μA
kΩ
pF
μA
V
mA
mA
μA
μA
V
V
2604fd
Normal Mode
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128
14
0.001
160
1
5.5
Reference Current, Power Down Mode All DACs Powered Down
2.5
1.3
1
0.35
0.10
2.4
2.0
2
1.6
1
1
Digital I/O
V
IH
Digital Input High Voltage
3
LTC2604/LTC2614/LTC2624
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. REF A = REF B = REF C = REF D = 4.096V (V
CC
= 5V), REF A = REF B =
REF C = REF D = 2.048V (V
CC
= 2.5V), REF LO = 0V, V
OUT
unloaded, unless otherwise noted. (Note 10)
SYMBOL
V
IL
V
OH
V
OL
I
LK
C
IN
PARAMETER
Digital Input Low Voltage
Digital Output High Voltage
Digital Output Low Voltage
Digital Input Leakage
Digital Input Capacitance
CONDITIONS
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 5.5V
Load Current = –100μA
Load Current = +100μA
V
IN
= GND to V
CC
(Note 6)
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ELECTRICAL CHARACTERISTICS
MIN
TYP
MAX
0.8
0.6
UNITS
V
V
V
V
μA
pF
V
CC
– 0.4
0.4
±1
8
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. REF
A = REF B = REF C = REF D = 4.096V (V
CC
= 5V), REF A = REF B = REF C = REF D = 2.048V (V
CC
= 2.5V), REF LO = 0V, V
OUT
unloaded,
unless otherwise noted. (Note 10)
LTC2624/LTC2624-1
SYMBOL PARAMETER
AC Performance
t
s
Settling Time (Note 8)
±0.024% (±1LSB at 12 Bits)
±0.006% (±1LSB at 14 Bits)
±0.0015% (±1LSB at 16 Bits)
±0.024% (±1LSB at 12 Bits)
±0.006% (±1LSB at 14 Bits)
±0.0015% (±1LSB at 16 Bits)
7
7
9
2.7
4.8
0.80
1000
12
180
120
100
15
7
9
10
2.7
4.8
5.2
0.80
1000
12
180
120
100
15
μs
μs
μs
μs
μs
μs
V/μs
pF
nV • s
kHz
nV√Hz
nV√Hz
μV
P–P
CONDITIONS
MIN
TYP
MAX
LTC2614/LTC2614-1
MIN
TYP
MAX
LTC2604/LTC2604-1
MIN
TYP
MAX
UNITS
Settling Time for
1LSB Step (Note 9)
Voltage Output Slew Rate
Capacitive Load Driving
Glitch Impulse
Multiplying Bandwidth
e
n
Output Voltage Noise
Density
Output Voltage Noise
2.7
0.80
1000
At Midscale Transition
At f = 1kHz
At f = 10kHz
0.1Hz to 10Hz
12
180
120
100
15
The
●
denotes specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. REF A = REF B = REF C = REF D = 4.096V (V
CC
= 5V), REF A = REF B = REF C = REF D
= 2.048V (V
CC
= 2.5V), REF LO = 0V, V
OUT
unloaded, unless otherwise noted. (Note 10)
SYMBOL
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
PARAMETER
SDI Valid to SCK Setup
SDI Valid to SCK Hold
SCK High Time
SCK Low Time
CS/LD
Pulse Width
LSB SCK High to
CS/LD
High
CS/LD
Low to SCK High
SDO Propagation Delay from SCK Falling Edge
C
LOAD
= 10pF
V
CC
= 4.5V to 5.5V
V
CC
= 2.5V to 5.5V
CONDITIONS
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TIMING CHARACTERISTICS
V
CC
= 2.5V to 5.5V
MIN
4
4
9
9
10
7
7
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
20
45
20
ns
ns
ns
2604fd
t
9
CLR
Pulse Width
4
LTC2604/LTC2614/LTC2624
The
●
denotes specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. REF A = REF B = REF C = REF D = 4.096V (V
CC
= 5V), REF A = REF B = REF C = REF D
= 2.048V (V
CC
= 2.5V), REF LO = 0V, V
OUT
unloaded, unless otherwise noted. (Note 10)
SYMBOL
t
10
PARAMETER
CS/LD
High to SCK Positive Edge
SCK Frequency
50% Duty Cycle
CONDITIONS
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TIMING CHARACTERISTICS
MIN
7
TYP
MAX
50
UNITS
ns
MHz
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
Linearity and monotonicity are defined from code k
L
to code
2
N
– 1, where N is the resolution and k
L
is given by k
L
= 0.016(2
N
/V
REF
),
rounded to the nearest whole code. For V
REF
= 4.096V and N = 16,
k
L
= 256, linearity is defined from code 256 to code 65,535.
Note 3:
Digital inputs at 0V or V
CC
.
Note 4:
DC crosstalk is measured with V
CC
= 5V and V
REF
= 4.096V, with
the measured DAC at midscale, unless otherwise noted.
Note 5:
R
L
= 2kΩ to GND or V
CC
.
Note 6:
Guaranteed by design and not production tested.
Note 7:
Inferred from measurement at code 256 (LTC2604), code 64
(LTC2614) or code 16 (LTC2624), and at full scale.
Note 8:
V
CC
= 5V, V
REF
= 4.096V. DAC is stepped 1/4 scale to 3/4 scale and
3/4 scale to 1/4 scale. Load is 2k in parallel with 200pF to GND.
Note 9:
V
CC
= 5V, V
REF
= 4.096V. DAC is stepped 1LSB between half scale
and half scale –1. Load is 2k in parallel with 200pF to GND.
Note 10:
These specifications apply to LTC2604/LTC2604-1, LTC2614/
LTC2614-1, LTC2624/LTC2624-1.
TYPICAL PERFORMANCE CHARACTERISTICS
(LTC2604/LTC2604-1, LTC2614/LTC2614-1, LTC2624/LTC2624-1)
Current Limiting
0.10
0.08
0.06
0.04
ΔV
OUT
(V)
0.02
0
–0.02
–0.04
–0.06
–0.08
–0.10
–40 –30 –20 –10 0
10
I
OUT
(mA)
20
30
40
V
REF
= V
CC
= 3V
V
REF
= V
CC
= 5V
CODE = MIDSCALE
V
REF
= V
CC
= 5V
V
REF
= V
CC
= 3V
ΔV
OUT
(mV)
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–35
–25
–15
–5
5
I
OUT
(mA)
15
25
35
–3
–50
–30
–10 10
30
50
TEMPERATURE (°C)
70
90
V
REF
= V
CC
= 3V
–2
V
REF
= V
CC
= 5V
OFFSET ERROR (mV)
2604 G02
Load Regulation
CODE = MIDSCALE
3
2
1
0
–1
Offset Error vs Temperature
2604 G01
2604 G03
Zero-Scale Error vs Temperature
3
2.5
ZERO-SCALE ERROR (mV)
GAIN ERROR (%FSR)
2.0
1.5
1.0
0.5
0
–50
0.4
0.3
Gain Error vs Temperature
3
2
OFFSET ERROR (mV)
–30
–10 10
30
50
TEMPERATURE (°C)
70
90
1
0
–1
–2
–0.3
–0.4
–50
Offset Error vs V
CC
0.2
0.1
0
–0.1
–0.2
–30
–10 10
30
50
TEMPERATURE (°C)
70
90
–3
2.5
3
3.5
4
V
CC
(V)
4.5
5
5.5
2604 G06
2604 G04
2604 G05
2604fd
5
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