MP7651
8-Channel, Voltage Output
10 MHz Input Bandwidth 8-Bit Multiplying
DACs with Serial Digital Data Port
and Chip Select Decoder
FEATURES
• Low Harmonic Distortion: 0.25% typical
• 8 Independent 2-Quadrant Multiplying 8-Bit DACs
• Serial Digital Input Data and Address Port (3-Wire
Standard) plus Internal Chip Address Decoder
• Dual Supplies (+5 V typ.)
with V
= 1 V p-p @ 1 MHz
REF
• V /2 Output Preset Level
REF
• Latch-Up Proof
• High Speed:
• Greater than 2000 V ESD Protection
–
–
12.5 MHz Digital Clock Rate
to V Settling Time: 150ns to
8-bit (typ)
V
REF
OUT
APPLICATIONS
–
Voltage Reference Input Bandwidth:
10 MHz (typ)
• ATE
• Process Control (Low Noise)
• Convergence Adjustment for High
Resolution Monitors (Work Stations)
• Digital Gain/Attenuation/Offset Control
• Trimmer Replacement
• Low Power: 150mW (typ)
• Low AC Voltage Reference Feedthrough
• Excellent Channel-to-Channel Isolation
• DNL = +0.8 LSB, INL = +1 LSB (typ)
• DACs Matched to +0.5% (typ)
GENERAL DESCRIPTION
The MP7651 is ideal for direct gain control of video, compos-
ite video, CCDandotherhighfrequencyanalogsignals. Thede-
vice includes 8-channels of high speed, high bandwidth, two
quadrant, multiplying, 8-bit accurate digital-to-analog converter.
It includes an output drive buffer per channel capable of driving
+1mA (typ) to a load. DNL of better than +0.8 LSB is achieved
with a channel-to-channel matching of better than 0.5%. Stabil-
ity, matching, and precision of the DACs is achieved by using
EXAR’sthinfilmtechnology. Also, excellentchannel-to-channel
isolation is achieved with EXAR’s BiCMOS process which can-
not be achieved using a typical CMOS technology.
fast output settling time, and VREF feedthrough isolation of
–65dB or better. In addition, low distortion in the order of 0.25%
with a 1 V p–p, 1 MHz signal.
A specified and constant input impedance of each VREF+ in-
put gives flexibility for optimal system design. The serial data
3-wire standard µ-processor logic interface reduces pin count,
package size (28 pin), and board wire (space). Additionally, the
internal chip select decoder allows for easy daisy chaining with-
out the addition of separate control logic.
MP7651 is fabricated on a junction isolated, high speed, dual
metal,linearcompatibleBiCMOS(BiCMOSIVTM)thinfilmresis-
tors. This process enables precision high speed analog/digital
(mixed-mode) circuits to be fabricated on the same chip.
An open loop architecture (patent pending) provides wide
small signal bandwidth from VREF to output up to 10 MHz (typ),
Rev. 2.00
1