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TQ6122 Datasheet

  • TQ6122

  • 1 Gigasample/sec, 8-bit Digital-to-Analog Converter

  • 938.31KB

  • 23頁

  • TRIQUINT

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T
R
I
Q
U
I
N
T
S E M I C O N D U C T O R, I N C .
BLANK
B0
A0
B4
A4
B5
A5
B6
A6
B7
A7 (MSB)
ECL INPUT
BUFFERS
MULTIPLEXER
TQ6122
1 Gigasample/sec,
8-bit Digital-to-Analog
Converter
Features
SELA
V
SS
(-5 V)
D
GND
D
Q
BLANKING
LOGIC
D5
Q5
D6
Q6
D7
Q7
MASTER
LATCH
BLANK D0
QBLANK Q0
D4
Q4
CLK
CLK
+
鈥?/div>
BLANK D0
D4
Q4
BINARY-TO-N-OF-7
SEGMENT ENCODER
S1 S2 S3 S4 S5 S6 S7
QS1
QS7
SLAVE
LATCH
V
OUT
V
OUT
+
鈥?/div>
V
REF
I
BLANK
I0
I4
IS1
IS7
50
50
A
GND
CURRENT-SOURCE ARRAY
V
SENSE
I
REF
V
AA
(-5V)
BLANK DISABLE
V
AA
鈥?1 Gs/s conversion rate
鈥?8-bit resolution
鈥?DC differential non-linearity
1
/ LSB (0.2%)
2
鈥?DC integral non-linearity
1 LSB (0.4%)
MIXED SIGNAL
PRODUCTS
(EXT. CONTROL LOOP)
FULL-SCALE ADJUST
QBLANK Q0
BANDGAP
REFERENCE
鈥?Settling time 2 ns to 0.4% (est.)
鈥?Spurious-free dynamic range
(SFDR) 45 dBc typical
鈥?ECL-compatible inputs
鈥?Synchronous blanking input
鈥?1.3 W power dissipation
鈥?44-pin multilayer ceramic
package or unpackaged die
TriQuint's TQ6122 GIGADAC鈩?is a monolithic, 8-bit digital-to-analog
converter capable of conversion rates to at least 1000 Megasamples/
second. The TQ6122 DAC may be used for display generation, waveform
and signal synthesis, and video signal reconstruction. The TQ6122 features
a 2:1 data MUX at the input for ease of interface and offers synchronous
blanking capability for maximum ease of use in video applications. It drives
complementary 1 V peak-to-peak swings into 50-ohm loads; on-chip 50-
ohm reverse terminations provide extremely fast settling time.
Due to the inherently high speed of TriQuint's one-micron gate
Enhancement / Depletion-mode gallium arsenide process, the TQ6122
offers guaranteed operation at clock rates of 1000 MHz, with typical room
temperature conversion rates of 1.5 Gs/s without multiplexing and 1.3 Gs/s
when using multiplexed inputs. The TQ6122 features output rise and fall
times of 500 ps (10% 鈥?90%), symmetric complementary output transitions,
and glitch impulse values less than 10 pV/sec. When used for sine wave
synthesis, typical spurious and harmonic free dynamic range is
鈮?5
dBc.
The TQ6122 may be retrofitted into designs which currently use TriQuint's
TQ6111, 2, 3, 4M DACs with minimal changes to power supply levels and
input and output connections. The part is available in a 44-pin ceramic
package or as unpackaged die.
Applications
鈥?Display generation
鈥?Waveform and signal synthesis
鈥?Video signal reconstruction
For additional information and latest specifications, see our website:
www.triquint.com
1

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