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LTC1654IGN#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LTC1654
1654fb
Dual 14-Bit Rail-to-Rail DAC
in 16-Lead SSOP Package
■
14-Bit Monotonic Over Temperature
■
Individually Programmable Speed/Power:
3µs Settling Time at 930µA
8.5µs Settling Time at 540µA
■
3V to 5V Single Supply Operation
■
Maximum Update Rate: 0.9MHz
■
Buffered True Rail-to-Rail Voltage Outputs
■
User Selectable Gain
■
Power-On Reset and Clear Function
■
Schmitt Trigger On Clock Input Allows Direct
Optocoupler Interface
■
Smallest Dual 14-Bit DAC: 16-Lead Narrow
SSOP Package
The LTC
®
1654 is a dual, rail-to-rail voltage output, 14-bit
digital-to-analog converter (DAC). It is available in a
16-lead narrow SSOP package, making it the smallest dual
14-bit DAC available. It includes output buffer amplifiers
and a flexible serial interface.
The LTC1654 has REFHI pins for each DAC that can be
driven up to V
CC
. The output will swing from 0V to V
CC
in
a gain of 1 configuration or V
CC
/2 in a gain of 1/2 configu-
ration. It operates from a single 2.7V to 5.5V supply.
The LTC1654 has two programmable speeds: a FAST and
SLOW mode with ±1LSB settling times of 3µs or 8.5µs
respectively and supply currents of 930µA and 540µA in
the two modes. The LTC1654 also has shutdown capabil-
ity, power-on reset and a clear function to 0V.
■
Digital Calibration
■
Industrial Process Control
■
Automatic Test Equipment
■
Offset/Gain Adjustment
■
Multiplying DAC
DAC B
1654 BD
V
OUT B
REFHI B
V
OUT A
X
1
/X
1/2
B
REFHI A
–
+
POWER-ON
RESET
DAC A
REFLO AREFLO B
X
1
/X
1/2
A
–
+
INPUT
LATCH
CONTROL
LOGIC
CS/LD
SCK
SDO
CLR
SDI
INPUT
LATCH
DAC
REGISTER
32-BIT
SHIFT
REGISTER
DAC
REGISTER
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
BLOCK DIAGRA
W
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 5396245.
2
LTC1654
1654fb
(Note 1)
V
CC
to GND .............................................. –0.5V to 7.5V
TTL Input Voltage, REFHI,
REFLO, X
1
/X
1/2
........................................ –0.5V to 7.5V
V
OUT
, SDO .................................. –0.5V to (V
CC
+ 0.5V)
Operating Temperature Range
LTC1654C ............................................. 0°C to 70°C
LTC1654I ........................................ – 40°C to 85°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
T
JMAX
= 125°C, θ
JA
= 110°C/W
LTC1654CGN
LTC1654IGN
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
X
1
/X
1/2
B
CLR
SCK
SDI
CS/LD
DGND
SDO
X
1
/X
1/2
A
V
CC
V
OUT B
REFHI B
REFLO B
AGND
REFLO A
REFHI A
V
OUT A
GN PART MARKING
1654
1654I
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The ● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T
A
= 25°C. Unless otherwise noted, V
CC
= 2.7V to 5.5V, V
OUT A
, V
OUT B
unloaded, REFHI A,
REFHI B = 4.096V (V
CC
= 5V), REFHI A, REFHI B = 2.048V (V
CC
= 2.7V), REFLO = 0V, X
1
/X
1/2
= 0V.
ELECTRICAL CHARACTERISTICS
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/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DAC
n Resolution ● 14 Bits
Monotonicity ● 14 Bits
DNL Differential Nonlinearity Guaranteed Monotonic (Note 2) ● ±0.3 ±1 LSB
INL Integral Nonlinearity Integral Nonlinearity (Note 2) ● ±1.2 ±4 LSB
ZSE Zero Scale Error 0°C ≤ T
A
≤ 70°C ● 0 6.5 mV
–40°C ≤ T
A
≤ 85°C ● 9.0 mV
V
OS
Offset Error 0°C ≤ T
A
≤ 70°C (Note 3) ● ±6.5 mV
–40°C ≤ T
A
≤ 85°C (Note 3) ● ±9.0 mV
V
OS
TC Offset Error Tempco ±15 µV/°C
Gain Error ● ±24 LSB
Gain Error Drift 5 ppm/°C
Power Supply
V
CC
Positive Supply Voltage For Specified Performance ● 2.7 5.5 V
I
CC
Supply Current (SLOW/FAST) 2.7V ≤ V
CC
≤ 5.5V (Note 5) SLOW ● 540 850 µA
2.7V ≤ V
CC
≤ 5.5V (Note 5) FAST ● 930 1400 µA
2.7V ≤ V
CC
≤ 3.3V (Note 5) SLOW ● 350 500 µA
2.7V ≤ V
CC
≤ 3.3V (Note 5) FAST ● 680 1000 µA
In Shutdown (Note 5)
● 310 µA
Op Amp DC Performance
Short-Circuit Current Low V
OUT
Shorted to GND ● 70 120 mA
Short-Circuit Current High V
OUT
Shorted to V
CC
● 80 120 mA
Output Impedance to GND Input Code = 0 ● 40 200 Ω
PSR Power Supply Rejection REFHIA, REFHIB = 4.096V (V
CC
= 5V ±10%) ● 2.5 mV/V
REFHIA, REFHIB = 2.048V (V
CC
= 3V ±10%)
Input Code = 16383
3
LTC1654
1654fb
The ● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T
A
= 25°C. Unless otherwise noted, V
CC
= 2.7V to 5.5V, V
OUT A
, V
OUT B
unloaded, REFHI A,
REFHI B = 4.096V (V
CC
= 5V), REFHI A, REFHI B = 2.048V (V
CC
= 2.7V), REFLO = 0V, X
1
/X
1/2
= 0V.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
AC Performance
Voltage Output Slew Rate (Note 8) SLOW ● 0.20 0.9 V/µs
(Note 8) FAST
● 1.25 3.8 V/µs
Voltage Output Settling Time (Note 4) to ±1LSB, SLOW 8.5 µs
(Note 4) to ±1LSB, FAST 3.0 µs
Digital Feedthrough (Note 7) 1 nV•s
Midscale Glitch Impulse DAC Switch Between 8000 and 7FFF 20 nV•s
Output Noise Voltage Density at 10kHz, SLOW 170 nV/√Hz
at 10kHz, FAST 150 nV/√Hz
Digital I/O
V
IH
Digital Input High Voltage V
CC
= 5V ● 2.4 V
V
IL
Digital Input Low Voltage V
CC
= 5V ● 0.8 V
V
OH
Digital Output High Voltage V
CC
= 5V, I
OUT
= –1mA, D
OUT
Only ● V
CC
– 0.4 V
V
OL
Digital Output Low Voltage V
CC
= 5V, I
OUT
= 1mA, D
OUT
Only ● 0.4 V
V
IH
Digital Input High Voltage V
CC
= 3V ● 2.4 V
V
IL
Digital Input Low Voltage V
CC
= 3V ● 0.8 V
V
OH
Digital Output High Voltage V
CC
= 3V, I
OUT
= –1mA, D
OUT
Only ● V
CC
– 0.4 V
V
OL
Digital Output Low Voltage V
CC
= 3V, I
OUT
= 1mA, D
OUT
Only ● 0.4 V
I
LEAK
Digital Input Leakage V
IN
= GND to V
CC
● ±10 µA
C
IN
Digital Input Capacitance (Note 6) 10 pF
Reference Input
Reference Input Resistance REFHI to REFLO ● 30 60 kΩ
Reference Input Range (Note 6) ● 0V
CC
V
Reference Input Current In Shutdown ● 1 µA
Switching Characteristics (V
CC
= 4.5V to 5.5V)
t
1
SDI Valid to SCK Setup ● 30 ns
t
2
SDI Valid to SCK Hold (Note 6) ● 0ns
t
3
SCK High Time (Note 6) ● 15 ns
t
4
SCK Low Time (Note 6) ● 15 ns
t
5
CS/LD Pulse Width (Note 6) ● 15 ns
t
6
LSB SCK to CS/LD (Note 6) ● 10 ns
t
7
CS/LD Low to SCK (Note 6) ● 10 ns
t
8
SD0 Output Delay C
LOAD
= 100pF ● 5 100 ns
t
9
SCK Low to CS/LD Low (Note 6) ● 10 ns
t
10
CLR Pulse Width (Note 6) ● 30 ns
Switching Characteristics (V
CC
= 2.7V to 5.5V)
t
1
SDI Valid to SCK Setup ● 45 ns
t
2
SDI Valid to SCK Hold (Note 6) ● 0ns
t
3
SCK High Time (Note 6) ● 20 ns
t
4
SCK Low Time (Note 6) ● 20 ns
t
5
CS/LD Pulse Width (Note 6) ● 20 ns
t
6
LSB SCK to CS/LD (Note 6) ● 15 ns
t
7
CS/LD Low to SCK (Note 6) ● 15 ns
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC1654IGN#TRPBF

Mfr. #:
Buy LTC1654IGN#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Digital to Analog Converters - DAC 2x 14-B R2R DAC in 16-Lead SSOP Package
Lifecycle:
New from this manufacturer.
Delivery:
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