TQ6122 Datasheet, PDF (1/23 Pages) TriQuint Semiconductor – 1 Gigasample/sec, 8-bit Digital-to-Analog Converter

TRIQUINT
S E M I C O N D U C T O R, I N C .
BLANK
A0
B0
A4
B4
A5
B5
A6
B6
A7 (MSB)
B7
ECL INPUT
BUFFERS
SELA
MULTIPLEXER
V _SS
(-5 V)
D
D_GND
CLK +
CLK –
BLANK D0
QBLANK Q0
BLANKING
Q
LOGIC
D4
D5
D6
D7 _MASTER
Q4
Q5
Q6
Q7
LATCH
BINARY-TO-N-OF-7
SEGMENT ENCODER
(EXT. CONTROL LOOP)
FULL-SCALE ADJUST
BANDGAP
REFERENCE
+ ^VREF
–
BLANK D0
QBLANK Q0
D4
S1 S2 S3 S4 S5 S6 S7
SLAVE
Q4
QS1
QS7 ^LATCH
V_OUT
I_BLANK I0
V_SENSE
I4
IS1
CURRENT-SOURCE ARRAY
I_REF
V_AA (-5V)
IS7 ⁵⁰
V_OUT
50
A_GND
BLANK DISABLE
V_AA
TriQuint's TQ6122 GIGADAC™ 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.
TQ6122
1 Gigasample/sec,
8-bit Digital-to-Analog
Converter
Features
• 1 Gs/s conversion rate
• 8-bit resolution
• DC differential non-linearity
1_{/2 LSB (0.2%)}
• DC integral non-linearity
1 LSB (0.4%)
• Settling time 2 ns to 0.4% (est.)
• Spurious-free dynamic range
(SFDR) 45 dBc typical
• ECL-compatible inputs
• Synchronous blanking input
• 1.3 W power dissipation
• 44-pin multilayer ceramic
package or unpackaged die
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% – 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 ≥45 dBc.
Applications
• Display generation
• Waveform and signal synthesis
• Video signal reconstruction
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.
For additional information and latest specifications, see our website: www.triquint.com
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