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Linear Technology Electronic Components Datasheet

LTC1654 Datasheet

Dual 14-Bit Rail-to-Rail DAC in 16-Lead SSOP Package

No Preview Available !

LTC1654 pdf
FEATURES
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
U
APPLICATIO S
Digital Calibration
Industrial Process Control
Automatic Test Equipment
Offset/Gain Adjustment
Multiplying DAC
LTC1654
Dual 14-Bit Rail-to-Rail DAC
in 16-Lead SSOP Package
DESCRIPTIO
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 VCC. The output will swing from 0V to VCC in
a gain of 1 configuration or VCC/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.
, 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.
BLOCK DIAGRA
CS/LD
SCK
CONTROL
LOGIC
SDI
INPUT
LATCH
DAC
REGISTER
DAC B
32-BIT
SHIFT
REGISTER
+
REFHI B
VOUT B
X1/X1/2 B
REFHI A
INPUT
LATCH
DAC
REGISTER
DAC A
+
VOUT A
SDO
CLR
POWER-ON
RESET
REFLO B
REFLO A
X1/X1/2 A
1654 BD
1654fb
1


Linear Technology Electronic Components Datasheet

LTC1654 Datasheet

Dual 14-Bit Rail-to-Rail DAC in 16-Lead SSOP Package

No Preview Available !

LTC1654 pdf
LTC1654
ABSOLUTE AXI U RATI GS
(Note 1)
VCC to GND .............................................. – 0.5V to 7.5V
TTL Input Voltage, REFHI,
REFLO, X1/X1/2 ........................................ – 0.5V to 7.5V
VOUT, SDO .................................. – 0.5V to (VCC + 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
UW U
PACKAGE/ORDER I FOR ATIO
X1/X1/2 B 1
CLR 2
SCK 3
SDI 4
TOP VIEW
16 VCC
15 VOUT B
14 REFHI B
13 REFLO B
ORDER PART
NUMBER
LTC1654CGN
LTC1654IGN
CS/LD 5
12 AGND
DGND 6
SDO 7
11 REFLO A
10 REFHI A
GN PART MARKING
X1/X1/2 A 8
9 VOUT A
GN PACKAGE
16-LEAD PLASTIC SSOP
1654
1654I
TJMAX = 125°C, θJA = 110°C/W
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.
ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at TA = 25°C. Unless otherwise noted, VCC = 2.7V to 5.5V, VOUT A, VOUT B unloaded, REFHI A,
REFHI B = 4.096V (VCC = 5V), REFHI A, REFHI B = 2.048V (VCC = 2.7V), REFLO = 0V, X1/X1/2 = 0V.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
DAC
n Resolution
Monotonicity
14
14
Bits
Bits
DNL Differential Nonlinearity
Guaranteed Monotonic (Note 2)
±0.3 ±1
LSB
INL Integral Nonlinearity
Integral Nonlinearity (Note 2)
±1.2 ±4
LSB
ZSE
VOS
VOSTC
Zero Scale Error
Offset Error
Offset Error Tempco
Gain Error
Gain Error Drift
0°C TA 70°C
– 40°C TA 85°C
0°C TA 70°C (Note 3)
– 40°C TA 85°C (Note 3)
0
6.5
9.0
±6.5
±9.0
± 15
±24
5
mV
mV
mV
mV
µV/°C
LSB
ppm/°C
Power Supply
VCC Positive Supply Voltage
ICC Supply Current (SLOW/FAST)
Op Amp DC Performance
For Specified Performance
2.7V VCC 5.5V (Note 5) SLOW
2.7V VCC 5.5V (Note 5) FAST
2.7V VCC 3.3V (Note 5) SLOW
2.7V VCC 3.3V (Note 5) FAST
In Shutdown (Note 5)
2.7
5.5
540 850
930 1400
350 500
680 1000
3 10
V
µA
µA
µA
µA
µA
Short-Circuit Current Low
Short-Circuit Current High
Output Impedance to GND
VOUT Shorted to GND
VOUT Shorted to VCC
Input Code = 0
70 120
mA
80 120
mA
40 200
PSR Power Supply Rejection
REFHIA, REFHIB = 4.096V (VCC = 5V ±10%)
REFHIA, REFHIB = 2.048V (VCC = 3V ±10%)
Input Code = 16383
2.5 mV/V
1654fb
2


Part Number LTC1654
Description Dual 14-Bit Rail-to-Rail DAC in 16-Lead SSOP Package
Maker Linear Technology
Total Page 16 Pages
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LTC1654 pdf
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