參數(shù)資料
型號： LTC1668IG#TR
廠商： Linear Technology
文件頁數(shù)： 1/24頁
文件大?。?/td> 0K
描述： IC DAC 16BIT 50MSPS 28SSOP
標準包裝： 2,000
設(shè)置時間： 20ns
位數(shù)： 16
數(shù)據(jù)接口： 并聯(lián)
轉(zhuǎn)換器數(shù)目： 1
電壓電源： 雙 ±
功率耗散（最大）： 180mW
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 28-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 28-SSOP
包裝： 帶卷 (TR)
輸出數(shù)目和類型： 2 電流，單極
采樣率（每秒）： 50M
配用： DC245A-A-ND - BOARD EVAL LTC1668
1
LTC1666/LTC1667/LTC1668
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATION
U
12-Bit, 14-Bit, 16-Bit,
50Msps DACs
s
50Msps Update Rate
s
Pin Compatible 12-Bit, 14-Bit and 16-Bit Devices
s
High Spectral Purity: 87dB SFDR at 1MHz fOUT
s
5pV-s Glitch Impulse
s
Differential Current Outputs
s
20ns Settling Time
s
Low Power: 180mW from
±5V Supplies
s
TTL/CMOS (3.3V or 5V) Inputs
s
Small Package: 28-Pin SSOP
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.
s
Cellular Base Stations
s
Multicarrier Base Stations
s
Wireless Communication
s
Direct Digital Synthesis (DDS)
s
xDSL Modems
s
Arbitrary Waveform Generation
s
Automated Test Equipment
s
Instrumentation
LTC1668, 16-Bit, 50Msps DAC
–
+
VSS
VDD
–5V
CLOCK
INPUT
16-BIT DATA
INPUT
LADCOM
AGND DGND
CLK
DB15
DB0
1666/7/8 TA01
IOUT A
0.1
F
LTC1668
5V
52.3
IREFIN
REFOUT
COMP1
COMP2
C2
0.1
F
0.1
F
C1
0.1
F
RSET
2k
IOUT B
52.3
VOUT
1VP-P
DIFFERENTIAL
+
–
0.1
F
16-BIT
HIGH SPEED
DAC
2.5V
REFERENCE
LTC1668 SFDR vs fOUT and fCLOCK
fOUT (MHz)
0.1
SFDR
(dB)
100
90
80
70
60
50
1.0
10
100
1666/7/8 G05
5MSPS
25MSPS
50MSPS
DIGITAL AMPLITUDE = 0dBFS
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