LTC2600/LTC2610/LTC2620
Octal 16-/14-/12-Bit
Rail-to-Rail DACs in 16-Lead SSOP
DESCRIPTIO
The LTC
®
2600/LTC2610/LTC2620 are octal 16-, 14- and
12-bit, 2.5V-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 mono-
tonic.
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 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 LTC2600/LTC2610/LTC2620 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
FEATURES
s
s
s
s
s
s
s
s
s
s
Smallest Pin-Compatible Octal DACs:
LTC2600: 16 Bits
LTC2610: 14 Bits
LTC2620: 12 Bits
Guaranteed 16-Bit Monotonic Over Temperature
Wide 2.5V 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
Pin-Compatible 10-/8-Bit Versions
(LTC1660/LTC1665)
Tiny 16-Lead Narrow SSOP Package
APPLICATIO S
s
s
s
s
Mobile Communications
Process Control and Industrial Automation
Instrumentation
Automatic Test Equipment
BLOCK DIAGRA
GND
1
16 V
CC
REGISTER
REGISTER
REGISTER
REGISTER
V
OUT A
2
DAC A
DAC H
15 V
OUT H
REGISTER
REGISTER
REGISTER
V
OUT B
3
DAC B
REGISTER
DAC G
14 V
OUT G
REGISTER
REGISTER
REGISTER
REGISTER
V
OUT C
4
DAC C
DAC F
13 V
OUT F
DNL (LSB)
REGISTER
REGISTER
REGISTER
REGISTER
V
OUT D
5
DAC D
DAC E
12 V
OUT E
REF
6
CONTROL
LOGIC
DECODE
POWER-ON
RESET
11
CLR
CS/LD
7
10
SDO
SCK
8
32-BIT SHIFT REGISTER
9
SDI
2600 BD
U
W
U
Differential Nonlinearity (LTC2600)
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
2600 G21
V
CC
= 5V
V
REF
= 4.096V
2600fa
1
LTC2600/LTC2610/LTC2620
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
TOP VIEW
GND
V
OUT A
V
OUT B
V
OUT C
V
OUT D
REF
CS/LD
SCK
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 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
LTC2600C/LTC2610C/LTC2620C .......... 0°C to 70°C
LTC2600I/LTC2610I/LTC2620I .......... – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................ 300°C
LTC2600CGN
LTC2600IGN
LTC2610CGN
LTC2610IGN
LTC2620CGN
LTC2620IGN
GN PART MARKING
2600
2600I
2610
2610I
2620
2620I
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
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.5V to 5.5V, V
REF
≤
V
CC
, V
OUT
unloaded, unless otherwise noted.
SYMBOL
PARAMETER
Resolution
Monotonicity
DNL
INL
V
CC
= 5V, V
REF
= 4.096V (Note 2)
Differential Nonlinearity V
CC
= 5V, V
REF
= 4.096V (Note 2)
Integral Nonlinearity
V
CC
= 5V, V
REF
= 4.096V (Note 2)
Load Regulation
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
ZSE
V
OS
Zero-Scale Error
Offset Error
V
OS
Temperature
Coefficient
GE
Gain Error
Gain Temperature
Coefficient
V
CC
= 5V, V
REF
= 4.096V
q
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
q
q
q
q
q
q
q
q
LTC2620
TYP MAX
MIN
14
14
LTC2610
TYP MAX
MIN
16
16
LTC2600
TYP MAX
UNITS
Bits
Bits
DC Performance
12
12
±0.5
±0.75
±4
±3
0.1
0.1
0.2
0.2
1
±1
±3
±0.7
±0.2
±6.5
±0.7
±1
±16
0.5
0.5
1
1
9
±9
±12
0.3
0.3
0.8
0.8
1
±1
±3
±0.2
±6.5
±1
±64
2
2
4
4
9
±9
0.025 0.125
0.025 0.125
0.05
0.05
1
±1
±3
±0.2
±6.5
0.25
0.25
9
±9
LSB/mA
LSB/mA
LSB/mA
LSB/mA
mV
mV
µV/°C
V
CC
= 5V, V
REF
= 4.096V Code = 0
q
V
CC
= 5V, V
REF
= 4.096V (Note 7)
q
±0.7
%FSR
ppm/°C
2600fa
2
U
LSB
LSB
W
U
U
W W
W
LTC2600/LTC2610/LTC2620
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.5V to 5.5V, V
REF
≤
V
CC
, V
OUT
unloaded, unless otherwise noted.
SYMBOL
PSR
R
OUT
PARAMETER
Power Supply Rejection
DC Output Impedance
DC Crosstalk (Note 4)
CONDITIONS
V
CC
=
±10%
V
REF
= V
CC
= 5V, Midscale; –15mA
≤
I
OUT
≤
15mA
q
V
REF
= V
CC
= 2.5V, Midscale; –7.5mA
≤
I
OUT
≤
7.5mA
q
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
= 5.6V
Code: Zero Scale; Forcing Output to V
CC
Code: Full Scale; Forcing Output to GND
V
CC
= 2.5V, V
REF
= 2.6V
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 All DACs Powered Down
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
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)
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
LTC2600/LTC2610/LTC2620
MIN
TYP
MAX
–80
0.025
0.030
±10
±3.5
±7.3
15
15
7.5
7.5
0
11
16
90
0.001
2.5
2.6
2.0
0.35
0.10
2.4
2.0
0.8
0.6
V
CC
– 0.4
0.4
±1
8
1
5.5
4
3.2
1
1
34
34
18
24
60
60
50
50
V
CC
20
0.15
0.15
UNITS
dB
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
Normal Mode
q
Power Supply
q
q
q
q
q
Digital I/O
V
IH
V
IL
V
OH
V
OL
I
LK
C
IN
Digital Input High Voltage
Digital Input Low Voltage
Digital Output High Voltage
Digital Output Low Voltage
Digital Input Leakage
Digital Input Capacitance
q
q
q
q
q
q
q
q
2600fa
3
LTC2600/LTC2610/LTC2620
The
q
denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.5V to 5.5V, V
REF
≤
V
CC
, V
OUT
unloaded, unless otherwise noted.
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
LTC2620
TYP MAX
MIN
LTC2610
TYP MAX
MIN
LTC2600
TYP MAX
UNITS
ELECTRICAL CHARACTERISTICS
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
q
denotes specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (See Figure 1) (Note 6)
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
q
q
q
q
q
q
q
q
q
q
q
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:
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:
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.
4
UW
LTC2600/LTC2610/LTC2620
MIN
TYP
MAX
UNITS
CLR Pulse Width
CS/LD High to SCK Positive Edge
SCK Frequency
50% Duty Cycle
q
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 (LTC2600), code 64
(LTC2610) or code 16 (LTC2620), and at fullscale.
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.
2600fa
LTC2600/LTC2610/LTC2620
TYPICAL PERFOR A CE CHARACTERISTICS
LTC2600
Integral Nonlinearity (INL)
32
24
16
DNL (LSB)
INL (LSB)
8
0
–8
–16
–24
–32
0
16384
32768
CODE
49152
65535
2600 G20
V
CC
= 5V
V
REF
= 4.096V
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152
65535
2600 G21
INL (LSB)
DNL vs Temperature
1.0
0.8
0.6
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)
V
CC
= 5V
V
REF
= 4.096V
DNL (POS)
INL (LSB)
32
24
16
0
–8
INL (NEG)
DNL (LSB)
Settling to
±1LSB
V
OUT
100µV/DIV
9.7µs
CS/LD
2V/DIV
V
CC
= 5V, V
REF
= 4.096V
1/4-SCALE TO 3/4-SCALE STEP
R
L
= 2k, C
L
= 200pF
AVERAGE OF 2048 EVENTS
U W
2600 G23
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
2600 G22
INL vs V
REF
1.5
V
CC
= 5.5V
1.0
INL (POS)
0.5
DNL vs V
REF
V
CC
= 5.5V
8
DNL (POS)
0
DNL (NEG)
–0.5
–1.0
–1.5
0
1
2
3
V
REF
(V)
4
5
2600 G24
0
1
2
3
V
REF
(V)
4
5
2600 G25
Settling of Full-Scale Step
V
OUT
100µV/DIV
12.3µs
CS/LD
2V/DIV
2µs/DIV
2600 G26
5µs/DIV
SETTLING TO
±1LSB
V
CC
= 5V, V
REF
= 4.096V
CODE 512 TO 65535 STEP
R
L
= 2k, C
L
= 200pF
AVERAGE OF 2048 EVENTS
2600 G27
2600fa
5
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