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LTC1668IG Datasheet

  • LTC1668IG

  • 16-Bit, 50Msps DAC

  • 16頁

  • LINER

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Final Electrical Specifications
LTC1668
16-Bit, 50Msps DAC
February 2000
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
50Msps Update Rate
16-Bit Resolution
High Spectral Purity: 87dB SFDR at 1MHz f
OUT
Differential Current Outputs
30ns Settling Time
5pV-s Glitch Impulse
Low Power: 180mW from
鹵5V
Supplies
TTL/CMOS (3.3V or 5V) Inputs
Small Package: 28-Pin SSOP
The LTC
廬
1668 is a 16-bit, 50Msps differential current
output DAC implemented on a high performance BiCMOS
process with laser trimmed, thin-film resistors. The com-
bination of a novel current-steering architecture and a
high performance process produces a DAC with excep-
tional AC and DC performance. This 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
鹵5V
supplies, the LTC1668 can be con-
figured to provide full-scale output currents up to 10mA.
The differential current outputs of the DAC allow single-
ended or true differential operation. The 鈥?V to 1V output
compliance of the LTC1668 allows the outputs to be con-
nected directly to external resistors to produce a differ-
ential output voltage without degrading the converter鈥檚
linearity. Alternatively, the outputs can be connected to the
summing junction of a high speed operational amplifier,
or to a transformer.
The LTC1668 is available in a 28-pin SSOP and is fully
specified over the industrial temperature range.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
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Cellular Base Stations
Multicarrier Base Stations
Wireless Communication
Direct Digital Synthesis (DDS)
xDSL Modems
Arbitrary Waveform Generation
Automated Test Equipment
Instrumentation
TYPICAL APPLICATIO
16-Bit, 50Msps DAC
5V
0.1碌F
V
DD
LTC1668
REFOUT
0.1碌F
R
SET
2k
I
REFIN
2.5V
REFERENCE
SIGNAL AMPLITUDE (dBm)
52.3鈩?/div>
+
鈥?/div>
COMP1
C1
0.1碌F
COMP2
C2
0.1碌F
V
SS
AGND DGND
CLK
I
OUT A
16-BIT
HIGH SPEED
DAC
52.3鈩?/div>
I
OUT B
+
V
OUT
1V
P-P
DIFFERENTIAL
鈥?/div>
LADCOM
DB15
DB0
1668 TA01
0.1碌F
鈥?5V
CLOCK 16-BIT DATA
INPUT
INPUT
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
Single Tone SFDR
鈥?
鈥?5
鈥?5
鈥?5
鈥?5
鈥?5
鈥?5
鈥?5
鈥?5
鈥?5
鈥?05
0.05
6.3
FREQUENCY (1.25MHz/DIV)
12.55
1668 G01
U
U
f
CLOCK
= 25Msps
f
OUT
= 1.007MHz
AMPLITUDE = 0dBFS
= 鈥?.5dBm
SFDR = 86dBc
1

LTC1668IG 產品屬性

  • LTC1666-68

  • 47

  • 集成電路 (IC)

  • 數據采集 - 數模轉換器

  • -

  • 20ns

  • 16

  • 并聯(lián)

  • 1

  • 雙 ±

  • 180mW

  • -40°C ~ 85°C

  • 表面貼裝

  • 28-SSOP（0.209"，5.30mm 寬）

  • 28-SSOP

  • 管件

  • 2 電流，單極

  • 50M

  • DC245A-A-ND - BOARD EVAL LTC1668

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    “Inductorless” 5V to + 5V Converter
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