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LTC1668IG#TRPBF

Description
DAC 1-CH Segment 16-bit Automotive 28-Pin SSOP T/R
File Size811KB,24 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC1668IG#TRPBF Overview

DAC 1-CH Segment 16-bit Automotive 28-Pin SSOP T/R

LTC1668IG#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
Converter TypeGeneral Purpose
Process TechnologyBiCMOS
ArchitectureSegment
Resolution16bit
Conversion Rate50Msps
Number of DAC Channels1
Number of Outputs per Chip1
Maximum Settling Time (us)0.02(Typ)
Digital Interface TypeParallel
Output TypeCurrent
Output PolarityUnipolar
Voltage ReferenceInternal|External
Minimum Dual Supply Voltage (V)±4.75
Typical Dual Supply Voltage (V)±5
Maximum Dual Supply Voltage (V)±5.25
Power Supply TypeDual
Maximum Power Dissipation (mW)180(Typ)
Integral Nonlinearity Error±8LSB
Full Scale Error2%FSR
Digital Supply SupportNo
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeIndustrial
Pin Count28
Standard Package NameSOP
Supplier PackageSSOP
MountingSurface Mount
Package Height2(Max) - 0.05(Min)
Package Length10.5(Max)
Package Width5.6(Max)
PCB changed28
Lead ShapeGull-wing
LTC1666/LTC1667/LTC1668
FEATURES
s
s
s
s
s
s
s
s
s
12-Bit, 14-Bit, 16-Bit,
50Msps DACs
DESCRIPTIO
The LTC
®
1666/LTC1667/LTC1668 are 12-/14-/16-bit,
50Msps differential current output DACs implemented on
a high performance BiCMOS process with laser trimmed,
thin-film resistors. The combination of a novel current-
steering architecture and a high performance process
produces DACs with exceptional AC and DC performance.
The LTC1668 is the first 16-bit DAC in the marketplace to
exhibit an SFDR (spurious free dynamic range) of 87dB
for an output signal frequency of 1MHz.
Operating from
±5V
supplies, the LTC1666/LTC1667/
LTC1668 can be configured to provide full-scale output
currents up to 10mA. The differential current outputs of
the DACs allow single-ended or true differential operation.
The – 1V to 1V output compliance of the LTC1666/
LTC1667/LTC1668 allows the outputs to be connected
directly to external resistors to produce a differential out-
put voltage without degrading the converter’s linearity. Al-
ternatively, the outputs can be connected to the summing
junction of a high speed operational amplifier, or to a
transformer.
The LTC1666/LTC1667/LTC1668 are pin compatible and
are available in a 28-pin SSOP and are fully specified over
the industrial temperature range.
, LTC and LT are registered trademarks of Linear Technology Corporation.
50Msps Update Rate
Pin Compatible 12-Bit, 14-Bit and 16-Bit Devices
High Spectral Purity: 87dB SFDR at 1MHz f
OUT
5pV-s Glitch Impulse
Differential Current Outputs
20ns Settling Time
Low Power: 180mW from
±5V
Supplies
TTL/CMOS (3.3V or 5V) Inputs
Small Package: 28-Pin SSOP
APPLICATIO S
s
s
s
s
s
s
s
s
Cellular Base Stations
Multicarrier Base Stations
Wireless Communication
Direct Digital Synthesis (DDS)
xDSL Modems
Arbitrary Waveform Generation
Automated Test Equipment
Instrumentation
TYPICAL APPLICATION
LTC1668, 16-Bit, 50Msps DAC
5V
0.1µF
V
DD
LTC1668
REFOUT
0.1µF
R
SET
2k
I
REFIN
2.5V
REFERENCE
52.3Ω
+
COMP1
C1
0.1µF
COMP2
C2
0.1µF
V
SS
AGND DGND
CLK
16-BIT
HIGH SPEED
DAC
52.3Ω
I
OUT B
V
OUT
1V
P-P
DIFFERENTIAL
SFDR (dB)
I
OUT A
+
LADCOM
DB15
DB0
1666/7/8 TA01
0.1µF
– 5V
CLOCK 16-BIT DATA
INPUT
INPUT
U
U
U
LTC1668 SFDR vs f
OUT
and f
CLOCK
100
5MSPS
90
25MSPS
80
50MSPS
70
60
DIGITAL AMPLITUDE = 0dBFS
0.1
1.0
f
OUT
(MHz)
1666/7/8
G05
50
10
100
1
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