LTC2604/LTC2614/LTC2624
Quad 16-Bit Rail-to-Rail DACs
in 16-Lead SSOP
FEATURES
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DESCRIPTIO
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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
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 sepa-
rate reference inputs for each DAC. They have built-in
high performance 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
TM
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 midscale until a valid write and update take place.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
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Mobile Communications
Process Control and Industrial Automation
Instrumentation
Automatic Test Equipment
BLOCK DIAGRA
GND
1
REF LO
2
REF A
3
DAC
REGISTER
V
CC
16
REF D
15
INPUT
REGISTER
DAC
REGISTER
V
OUT D
DAC D
14
4
DAC A
INPUT
REGISTER
V
OUTA
INPUT
REGISTER
DAC
REGISTER
V
OUT C
13
REF C
12
CLR
11
ERROR (LSB)
DAC C
V
OUTB
5
REF B
6
CS/LD
7
SCK
8
DAC B
DAC
REGISTER
INPUT
REGISTER
CONTROL
LOGIC
DECODE
SDO
10
SDI
9
2604 BD
32-BIT SHIFT REGISTER
U
Differential Nonlinearity (LTC2604)
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152
65535
2604 TA01
W
U
V
CC
= 5V
V
REF
= 4.096V
2604fb
1
LTC2604/LTC2614/LTC2624
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
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
T
JMAX
= 125°C,
θ
JA
= 150°C/W
GN PACKAGE
16-LEAD PLASTIC SSOP
GN PART MARKING
ORDER PART NUMBER
LTC2604CGN LTC2614IGN
2604
2614I
LTC2604CGN-1 LTC2614IGN-1
26041 2614I1
LTC2604IGN
LTC2624CGN
2604I 2624
LTC2604IGN-1 LTC2624CGN-1 2604I1 26241
LTC2614CGN LTC2624IGN
2614
2624I
LTC2614CGN-1 LTC2624IGN-1
26141 2624I1
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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 PARAMETER
DC Performance
Resolution
Monotonicity
DNL
Differential Nonlinearity
INL
Integral Nonlinearity
Load Regulation
CONDITIONS
●
ELECTRICAL CHARACTERISTICS
LTC2624/LTC2624-1 LTC2614/LTC2614-1 LTC2604/LTC2604-1
MIN TYP MAX MIN TYP MAX MIN TYP MAX
12
12
±0.5
±0.9 ±4
0.025 0.125
0.025 0.125
0.05
0.05
1.5
±1.5
±5
0.25
0.25
9
±9
14
14
±4
0.1
0.1
0.2
0.2
1.5
±1.5
±5
±1
±16
0.5
0.5
1
1
9
±9
16
16
±14
0.3
0.3
0.7
0.7
1.5
±1.5
±5
±1
±64
2
2
4
4
9
±9
UNITS
Bits
Bits
LSB
LSB
LSB/mA
LSB/mA
LSB/mA
LSB/mA
mV
mV
μV/°C
%FSR
ppm/°C
(Note 2)
(Note 2)
(Note 2)
V
REF
= V
CC
= 5V, Midscale
I
OUT
= 0mA to 15mA Sourcing
I
OUT
= 0mA to 15mA Sinking
V
REF
= V
CC
= 2.5V, Midscale
I
OUT
= 0mA to 7.5mA Sourcing
I
OUT
= 0mA to 7.5mA Sinking
(Note 7)
●
●
●
●
●
●
●
●
●
ZSE
V
OS
GE
Zero-Scale Error
Offset Error
V
OS
Temperature
Coefficient
Gain Error
Gain Temperature
Coefficient
●
±0.1 ±0.7
±5
±0.1 ±0.7
±5
±0.1 ±0.7
±5
SYMBOL
PSR
PARAMETER
Power Supply Rejection
CONDITIONS
V
CC
= 5V
±10%
V
CC
= 3V
±10%
MIN
TYP
–80
–80
MAX
UNITS
dB
dB
2604fb
2
U
W
U
U
W W
W
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
R
OUT
PARAMETER
DC Output Impedance
DC Crosstalk (Note 4)
CONDITIONS
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
MIN
●
●
ELECTRICAL CHARACTERISTICS
TYP
0.025
0.030
±5
±1
±3.5
34
36
18
24
MAX
0.15
0.15
UNITS
Ω
Ω
μV
μV/mA
μV
mA
mA
mA
mA
V
kΩ
pF
μA
V
mA
mA
μA
μA
V
V
V
V
V
V
μA
pF
I
SC
Short-Circuit Output Current
●
●
●
●
●
15
15
7.5
7.5
0
88
60
60
50
50
V
CC
160
1
5.5
2
1.6
1
1
Reference Input
Input Voltage Range
Resistance
Capacitance
I
REF
Reference Current, Power Down Mode
Power Supply
V
CC
Positive Supply Voltage
I
CC
Supply Current
Normal Mode
All DACs Powered Down
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
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)
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
128
14
0.001
2.5
1.3
1
0.35
0.10
2.4
2.0
Digital I/O
V
IH
Digital Input High Voltage
V
IL
V
OH
V
OL
I
LK
C
IN
Digital Input Low Voltage
Digital Output High Voltage
Digital Output Low Voltage
Digital Input Leakage
Digital Input Capacitance
0.8
0.6
V
CC
– 0.4
0.4
±1
8
SYMBOL PARAMETER
AC Performance
t
s
Settling Time (Note 8)
CONDITIONS
±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)
LTC2624/LTC2624-1 LTC2614/LTC2614-1 LTC2604/LTC2604-1
MIN TYP MAX MIN TYP MAX MIN TYP MAX
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
UNITS
μs
μs
μs
μs
μs
μs
V/μs
pF
nV • s
kHz
nV/√Hz
nV/√Hz
μV
P-P
2604fb
Settling Time for
1LSB Step (Note 9)
Voltage Output Slew Rate
Capacitive Load Driving
Glitch Impulse
Multiplying Bandwidth
Output Voltage Noise
Density
Output Voltage Noise
2.7
At Midscale Transition
At f = 1kHz
At f = 10kHz
0.1Hz to 10Hz
e
n
0.80
1000
12
180
120
100
15
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
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
●
●
●
●
●
●
●
●
●
●
●
TI I G CHARACTERISTICS
V
CC
= 2.5V to 5.5V
4
4
9
9
10
7
7
20
45
20
7
50
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MHz
t
9
t
10
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.
TYPICAL PERFOR A CE CHARACTERISTICS
(LTC2604/LTC2604-1, LTC2614/LTC2614-1, LTC2624/LTC2624-1)
Current Limiting
0.10
0.08
0.06
0.04
ΔV
OUT
(V)
CODE = MIDSCALE
V
REF
= V
CC
= 5V
V
REF
= V
CC
= 3V
0.4
OFFSET ERROR (mV)
ΔV
OUT
(mV)
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
4
U W
UW
MIN
TYP
MAX
UNITS
CLR Pulse Width
CS/LD High to SCK Positive Edge
SCK Frequency
50% Duty Cycle
●
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.
Load Regulation
1.0
0.8
0.6
2
1
0
–1
–2
CODE = MIDSCALE
3
Offset Error vs Temperature
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–35
–25
–15
–5
5
I
OUT
(mA)
15
25
35
V
REF
= V
CC
= 3V
V
REF
= V
CC
= 5V
–3
–50
–30
–10 10
30
50
TEMPERATURE (°C)
70
90
2604 G01
2604 G02
2604 G03
2604fb
LTC2604/LTC2614/LTC2624
TYPICAL PERFOR A CE CHARACTERISTICS
(LTC2604/LTC2604-1, LTC2614/LTC2614-1, LTC2624/LTC2624-1)
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
OFFSET ERROR (mV)
–30
–10 10
30
50
TEMPERATURE (°C)
70
90
0.2
0.1
0
–0.1
–0.2
–0.3
–30
–10 10
30
50
TEMPERATURE (°C)
70
90
–0.4
–50
–2
–3
2.5
Gain Error vs V
CC
0.4
0.3
0.2
GAIN ERROR (%FSR)
0.1
I
CC
(nA)
0
–0.1
–0.2
–0.3
–0.4
2.5
3
3.5
4
V
CC
(V)
4.5
Midscale Glitch Impulse
V
OUT
10mV/DIV
12nV-s TYP
CS/LD
5V/DIV
2604 G10
2.5μs/DIV
U W
2604 G04
Gain Error vs Temperature
3
2
1
0
–1
Offset Error vs V
CC
3
3.5
4
V
CC
(V)
4.5
5
5.5
2604 G06
2604 G05
I
CC
Shutdown vs V
CC
450
400
350
300
250
200
150
100
50
5
5.5
2604 G07
Large-Signal Settling
V
OUT
0.5V/DIV
V
REF
= V
CC
= 5V
1/4-SCALE TO 3/4-SCALE
2.5μs/DIV
2604 G09
0
2.5
3
3.5
4
V
CC
(V)
4.5
5
5.5
2604 G08
Power-On Reset Glitch
Power-On Reset to Midscale
V
REF
= V
CC
V
CC
1V/DIV
4mV PEAK
4mV PEAK
V
OUT
10mV/DIV
250μs/DIV
2604 G11
V
CC
1V/DIV
V
OUT
1V/DIV
500μs/DIV
2604 G34
2604fb
5
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