LTC2605/LTC2615/LTC2625
Octal 16-/14-/12-Bit
Rail-to-Rail DACs in 16-Lead SSOP
DESCRIPTIO
The LTC
®
2605/LTC2615/LTC2625 are octal 16-, 14-
and 12-bit, 2.7V to 5.5V rail-to-rail voltage-output DACs in
16-lead narrow SSOP packages. They have built-in
high performance output buffers and are guaranteed
monotonic.
These parts establish new board-density benchmarks
for 16- and 14-bit DACs and advance performance
standards for output drive, crosstalk and load regulation
in single-supply, voltage-output multiples.
The parts use the 2-wire I
2
C compatible serial interface.
The LTC2605/LTC2615/LTC2625 operate in both the
standard mode (maximum clock rate of 100kHz) and the
fast mode (maximum clock rate of 400kHz).
The LTC2605/LTC2615/LTC2625 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 LTC2605-1/
LTC2615-1/LTC2625-1 to midscale. The voltage output
stays at midscale until a valid write and update
takes place.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
FEATURES
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Smallest Pin-Compatible Octal DACs:
LTC2605: 16 Bits
LTC2615: 14 Bits
LTC2625: 12 Bits
Guaranteed Monotonic Over Temperature
400kHz I
2
C Interface
Wide 2.7V to 5.5V Supply Range
Low Power Operation: 250µA per DAC at 3V
Individual Channel Power-Down to 1µA, Max
Ultralow Crosstalk Between DACs (<10µV)
High Rail-to-Rail Output Drive (±15mA, Min)
Double-Buffered Digital Inputs
27 Selectable Addresses
LTC2605/LTC2615/LTC2625: Power-On Reset to
Zero Scale
LTC2605-1/LTC2615-1/LTC2625-1: Power-On Reset
to Midscale
Tiny 16-Lead Narrow SSOP Package
APPLICATIO S
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Mobile Communications
Process Control and Industrial Automation
Instrumentation
Automatic Test Equipment
BLOCK DIAGRA
GND
1
V
OUT A
2
DAC A
16 V
CC
REGISTER
REGISTER
REGISTER
REGISTER
DAC H
15 V
OUT H
REGISTER
REGISTER
REGISTER
REGISTER
V
OUT B
3
DAC B
DAC G
14 V
OUT G
REGISTER
REGISTER
REGISTER
REGISTER
DNL (LSB)
V
OUT C
4
DAC C
DAC F
13 V
OUT F
REGISTER
REGISTER
REGISTER
REGISTER
V
OUT D
5
DAC D
DAC E
12 V
OUT E
REF
6
32-BIT SHIFT REGISTER
11
CA0
CA2
7
10
CA1
2-WIRE INTERFACE
SCL
8
9
2605/15/25 BD
SDA
U
W
U
Differential Nonlinearity (LTC2605)
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
2605 G02
V
CC
= 5V
V
REF
= 4.096V
2605f
1
LTC2605/LTC2615/LTC2625
ABSOLUTE
AXI U
RATI GS
Any Pin to GND ........................................... – 0.3V to 6V
Any Pin to V
CC
.............................................– 6V to 0.3V
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
GND
V
OUT A
V
OUT B
V
OUT C
V
OUT D
REF
CA2
SCL
1
2
3
4
5
6
7
8
16 V
CC
15 V
OUT H
14 V
OUT G
13 V
OUT F
12 V
OUT E
11 CA0
10 CA1
9
SDA
GN PACKAGE
16-LEAD PLASTIC SSOP
T
JMAX
= 125°C,
θ
JA
= 150°C/W
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 = 4.096V (V
CC
= 5V), REF = 2.048V (V
CC
= 2.7V), V
OUT
unloaded,
unless otherwise noted.
SYMBOL
PARAMETER
Resolution
Monotonicity
DNL
INL
Integral Nonlinearity
Load Regulation
(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
= 2.7V, Midscale
I
OUT
= 0mA to 7.5mA Sourcing
I
OUT
= 0mA to 7.5mA Sinking
ZSE
V
OS
Zero-Scale Error
Offset Error
V
OS
Temperature
Coefficient
GE
Gain Error
Gain Temperature
Coefficient
●
ELECTRICAL CHARACTERISTICS
CONDITIONS
DC Performance
●
●
●
●
●
●
●
●
●
●
Differential Nonlinearity (Note 2)
Code = 0
(Note 4)
2
U
U
W
W W
U
W
(Note 1)
Operating Temperature Range
LTC2605C/LTC2615C/LTC2625C ............. 0°C to 70°C
LTC2605C-1/LTC2615C-1/LTC2625C-1 ... 0°C to 70°C
LTC2605I/LTC2615I/LTC2625I ............ – 40°C to 85°C
LTC2605I-1/LTC2615I-1/LTC2625I-1 .. – 40°C to 85°C
ORDER PART NUMBER
LTC2605CGN
LTC2605CGN-1
LTC2605IGN
LTC2605IGN-1
LTC2615CGN
LTC2615CGN-1
LTC2615IGN
LTC2615IGN-1
LTC2625CGN
LTC2625CGN-1
LTC2625IGN
LTC2625IGN-1
GN PART MARKING
2605
26051
2605I
26O5I1
2615
26151
2615I
2615I1
2625
26251
2625I
2625I1
LTC2625/-1
MIN TYP MAX
12
12
±0.5
±1
±4
LTC2615/-1
MIN TYP MAX
14
14
±1
±4
0.07
0.10
0.15
0.20
1.7
±1
±5
±16
0.5
0.5
1
1
9
±9
LTC2605/-1
MIN TYP MAX
16
16
±1
±18
0.3
0.4
0.6
0.8
1.7
±1
±5
±64
2
2
4
4
9
±9
UNITS
Bits
Bits
LSB
LSB
LSB/mA
LSB/mA
LSB/mA
LSB/mA
mV
mV
µV/°C
0.02 0.125
0.03 0.125
0.04
0.07
1.7
±1
±5
±0.1
±8
±0.7
0.25
0.25
9
±9
±0.1
±8
±0.7
±0.1
±8
±0.7
%FSR
ppm/°C
2605f
LTC2605/LTC2615/LTC2625
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. REF = 4.096V (V
CC
= 5V), REF = 2.048V (V
CC
= 2.7V), V
OUT
unloaded,
unless otherwise noted. (Note 9)
SYMBOL
PSR
R
OUT
PARAMETER
Power Supply Rejection
DC Output Impedance
DC Crosstalk (Note 10)
CONDITIONS
V
CC
±10%
V
REF
= V
CC
= 5V, Midscale; –15mA
≤
I
OUT
≤
15mA
●
V
REF
= V
CC
= 2.7V, Midscale; –7.5mA
≤
I
OUT
≤
7.5mA
●
Due to Full Scale Output Change (Note 11)
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
= 2.7V, V
REF
= 2.7V
Code: Zero Scale; Forcing Output to V
CC
Code: Full Scale; Forcing Output to GND
Reference Input
Input Voltage Range
Resistance
Capacitance
I
REF
V
CC
I
CC
Reference Current, Power Down Mode DAC Powered Down
Positive Supply Voltage
Supply Current
For Specified Performance
V
CC
= 5V (Note 3)
V
CC
= 3V (Note 3)
DAC Powered Down (Note 3) V
CC
= 5V
DAC Powered Down (Note 3) V
CC
= 3V
●
●
●
●
●
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
MIN
TYP
–80
0.02
0.03
±10
±3.5
±7
MAX
0.15
0.15
UNITS
dB
Ω
Ω
µV
µV/mA
µV
I
SC
Short-Circuit Output Current
15
15
7.5
7.5
0
11
34
34
20
27
60
60
50
50
V
CC
mA
mA
mA
mA
V
kΩ
pF
µA
V
mA
mA
µA
µA
V
V
Normal Mode
●
16
90
0.001
20
1
5.5
Power Supply
2.7
2.50
2.00
0.38
0.16
4.0
3.2
1.0
1.0
0.3V
CC
0.7V
CC
0.15V
CC
0.85V
CC
10
10
2
0
0.4
250
50
1
10
400
10
Digital I/O (Note 9)
V
IL
V
IH
V
IL(CA)
V
IH(CA)
R
INH
R
INL
R
INF
V
OL
t
OF
t
SP
I
IN
C
IN
C
B
C
CAn
Low Level Input Voltage
(SDA and SCL)
High Level Input Voltage
(SDA and SCL)
Low Level Input Voltage (CA0 to CA2)
High Level Input Voltage (CA0 to CA2)
Resistance from CA
n
(n = 0,1,2)
to V
CC
to Set CA
n
= V
CC
Resistance from CA
n
(n = 0,1,2)
to GND to Set CA
n
= GND
Resistance from CA
n
(n = 0,1,2)
to V
CC
or GND to Set CA
n
= FLOAT
Low Level Output Voltage
Output Fall Time
Pulse Width of Spikes Surpassed
by Input Filter
Input Leakage
I/O Pin Capacitance
Capacitance Load for Each Bus Line
External Capacitive Load on
Address Pins CA0, CA1 and CA2
0.1V
CC
≤
V
IN
≤
0.9V
CC
(Note 12)
See Test Circuit 1
See Test Circuit 1
See Test Circuit 2
See Test Circuit 2
See Test Circuit 2
Sink Current = 3mA
V
O
= V
IH(MIN)
to V
O
= V
IL(MAX)
,
C
B
= 10pF to 400pF (Note 7)
●
●
●
●
●
●
V
V
kΩ
kΩ
MΩ
V
ns
ns
µA
pF
pF
pF
●
20 + 0.1C
B
●
●
●
●
●
0
2605f
3
LTC2605/LTC2615/LTC2625
The
●
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. REF = 4.096V (V
CC
= 5V), REF = 2.048V (V
CC
= 2.7V), V
OUT
unloaded,
unless otherwise noted.
SYMBOL PARAMETER
AC Performance
t
S
Settling Time (Note 5)
±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
LTC2625/-1
MIN TYP MAX
LTC2615/-1
MIN TYP MAX
LTC2605/-1
MIN TYP MAX
UNITS
ELECTRICAL CHARACTERISTICS
Settling Time for 1LSB Step
(Note 6)
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. (See Figure 1) (Notes 8, 9)
SYMBOL
f
SCL
t
HD(STA)
t
LOW
t
HIGH
t
SU(STA)
t
HD(DAT)
t
SU(DAT)
t
r
t
f
t
SU(STO)
t
BUF
PARAMETER
SCL Clock Frequency
Hold Time (Repeated) Start Condition
Low Period of the SCL Clock Pin
High Period of the SCL Clock Pin
Set-Up Time for a Repeated Start Program
Data Hold Time
Data Set-Up Time
Rise Time of Both SDA and SCL Signals
Fall Time of Both SDA and SCL Signals
Set-Up Time for Stop Condition
Bus Free Time Between a Stop and Start Condition
(Note 7)
(Note 7)
CONDITIONS
●
●
●
●
●
●
●
●
●
●
●
TI I G CHARACTERISTICS
V
CC
= 2.7V to 5.5V
0
0.6
1.3
0.6
0.6
0
100
20 + 0.1C
B
20 + 0.1C
B
0.6
1.3
300
300
0.9
400
kHz
µs
µs
µs
µs
µs
ns
ns
ns
µs
µs
Note 1:
Absolute maximum ratings are those values beyond which the life
of a device may be impaired.
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 and linearity is defined from code 256 to code 65,535.
Note 3:
SDA, SCL at 0V or V
CC
, CA0, CA1 and CA2 floating.
Note 4:
Inferred from measurement at code 256 (LTC2605/LTC2605-1),
code 64 (LTC2615/LTC2615-1) or code 16 (LTC2625/LTC2625-1) and
at full scale.
Note 5:
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 2kΩ in parallel with 200pF to GND.
4
UW
MIN
TYP
MAX
UNITS
Note 6:
V
CC
= 5V, V
REF
= 4.096V. DAC is stepped
±1LSB
between half
scale and half scale – 1. Load is 2kΩ in parallel with 200pF to GND.
Note 7:
C
B
= capacitance of one bus line in pF.
Note 8:
All values refer to V
IH(MIN)
and V
IL(MAX)
levels.
Note 9:
These specifications apply to LTC2605/LTC2605-1, LTC2615/
LTC2615-1 and LTC2625/LTC2625-1.
Note 10:
DC Crosstalk is measured with V
CC
= 5V and V
REF
= 4096V, with
the measured DAC at midscale, unless otherwise noted.
Note 11:
R
L
= 2kΩ to GND or V
CC
.
Note 12:
Guaranteed by design and not production tested.
2605f
LTC2605/LTC2615/LTC2625
ELECTRICAL CHARACTERISTICS
Test Circuit 1
100Ω
CA
n
R
INH
/R
INL
/R
INF
Test Circuit 2
V
DD
V
IH(CA
n
)
/V
IL(CA
n
)
2605/15/25 EC01
2605/15/25 EC02
GND
TYPICAL PERFOR A CE CHARACTERISTICS
LTC2605
Integal Nonlinearity (INL)
32
24
16
DNL (LSB)
INL (LSB)
8
0
–8
–16
–24
–32
0
16384
32768
CODE
49152
65535
2605 G01
V
CC
= 5V
V
REF
= 4.096V
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152
65535
2605 G02
INL (LSB)
DNL vs Temperature
1.0
0.8
0.6
16
0.4
DNL (LSB)
0.2
0
–0.2
–0.4
–16
–0.6
–0.8
–1.0
–50
–30
–10 10
30
50
TEMPERATURE (°C)
70
90
–24
–32
DNL (NEG)
DNL (POS)
INL (LSB)
8
0
–8
V
CC
= 5V
V
REF
= 4.096V
32
24
DNL (LSB)
U W
2605 G04
Differential Nonlinearity (DNL)
1.0
0.8
0.6
0.4
0.2
16
8
0
–8
–16
–24
V
CC
= 5V
V
REF
= 4.096V
32
24
INL vs Temperature
V
CC
= 5V
V
REF
= 4.096V
INL (POS)
INL (NEG)
–32
–50
–30
–10 10
30
50
TEMPERATURE (°C)
70
90
2605 G03
INL vs V
REF
V
CC
= 5.5V
1.5
1.0
INL (POS)
0.5
DNL vs V
REF
V
CC
= 5.5V
DNL (POS)
0
DNL (NEG)
–0.5
–1.0
–1.5
INL (NEG)
0
1
2
3
V
REF
(V)
4
5
2605 G05
0
1
2
3
V
REF
(V)
4
5
2605 G06
2605f
5
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