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MP7652AS Datasheet

  • MP7652AS

  • 4-Channel Voltage Output 15 MHz, Input Bandwidth, 8-Bit Mult...

  • 16頁(yè)

  • EXAR   EXAR

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MP7652
4-Channel Voltage Output
15 MHz, Input Bandwidth, 8-Bit Multiplying
DACs with 3-Wire Serial Digital Port
and Independent References
FEATURES
鈥?/div>
Independent References
鈥?/div>
4 Independent 2-Quadrant Multiplying 8-Bit DACs
鈥?/div>
Dual Positive (+10 V and +5 V) Supplies or
Dual (+5 V) Supplies Capability
鈥?/div>
High Speed:
鈥?12.5 MHz Digital Clock Rate
鈥?V
REF to
V
OUT
Settling Time: 150ns to 8鈥揵it
(typ)
鈥?Voltage Reference Input Bandwidth:
15 MHz
鈥?/div>
Low Power: 80mW
鈥?/div>
Low AC Voltage Reference Feedthrough
鈥?/div>
Excellent Channel-to-Channel Isolation
鈥?/div>
DNL = +0.5 LSB, INL = +1 LSB (typ)
鈥?/div>
DACs Matched to +0.5% (typ)
鈥?/div>
Very Low Noise
鈥?/div>
Low Harmonic Distortion: 0.25% typical with
V
REF
= 1 V p-p @ 1 MHz
鈥?/div>
V
REF
/2 Output Preset Level
鈥?/div>
Latch-Up Free
鈥?/div>
ESD Protection: 2000 V Minimum
APPLICATIONS
鈥?/div>
Direct High-Frequency Automatic Gain Control
鈥?/div>
Video AGC & CCD Level AGC
鈥?/div>
Convergence Adjustment for High-Resolution
Monitors (Workstations)
GENERAL DESCRIPTION
The MP7652 is ideal for digital gain control of high frequency
analog signals such as video, composite video, CCD and oth-
ers. The device includes 4-channels of high speed, wide
bandwidth, two quadrant multiplying, 8-bit accurate digital-to-
analog converter. It includes an output drive buffer per channel
capable of driving a +1mA (typ) load. DNL of better than +0.5
LSB is achieved with a channel-to-channel matching of typically
0.5%. Stability, matching, and precision of the DACs are
achieved by using MPS鈥?thin film technology. Also, excellent
channel-to-channel isolation is achieved with EXAR鈥檚 BiCMOS
process which cannot be achieved using a typical CMOS tech-
nology.
An open loop architecture (patent pending) provides wide
small signal bandwidth from V
REF
to output up to 15 MHz (typ),
fast output settling time of 150 ns, and excellent V
REF
feedthrough isolation. The bottom of each DAC reference string
is brought out separately for totally isolated operation. In addi-
tion, low distortion in the order of 0.25% with a 1 V p-p, 1 MHz
signal is achieved.
The combination of a constant input Z and the ability to vary
V
REFN
within V
CC
鈥?.8 and V
EE
+1.5 V allows flexibility for opti-
mum system design.
The MP7652 is fabricated on a junction isolated, high speed
BiCMOS (BiCMOS IV
TM
) process with thin film resistors. This
process enables precision high speed analog/digital (mixed-
mode) circuits to be fabricated on the same chip.
ORDERING INFORMATION
Package
Type
SOIC
Plastic Dip
Temperature
Range
鈥?0 to +85
擄
C
鈥?0 to +85
擄
C
Part No.
MP7652AS
MP7652AN
INL
(LSB)
+1
+1
DNL
(LSB)
+0.5
+0.5
Gain Error
(% FSR)
+1.5
+1.5
Rev. 1.00
1

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