MP7612
...the analog plus company
TM
FEATURES
•
Eight Independent 12-Bit DACs with Output Amplifiers
•
Low Power 320 mW (typ.)
•
Serial Digital Data and Address Port (3-Wire
Standard)
•
12-Bit Resolution, 11 Bit Accuracy
•
Extremely Well Matched DACs
•
Extremely Low Analog Ground Current (<60µA/Channel)
•
+10 V Output Swing with +11.4 V Supplies
•
Zero Volt Output Preset (Data = 10 .. 00)
•
Rugged Construction – Latch-Up Free
•
Parallel Version: MP7613
Octal 12-Bit DAC Array
TM
D/A Converter with Output Amplifier
and Serial Data/Address
µP
Control Logic
APPLICATIONS
•
•
•
•
•
•
•
Data Acquisition Systems
ATE
Process Control
Self-Diagnostic Systems
Logic Analyzers
Digital Storage Scopes
PC Based Controller/DAS
April 1996-4
GENERAL DESCRIPTION
The MP7612 provides eight independent 12-bit resolution
Digital-to-Analog Converters with voltage output amplifiers and
a 3-wire standard serial digital address and data port.
Typical DAC matching for B grade versions is 0.7 LSB across
all codes. Accuracy of +0.75 LSB for DNL and +1 LSB for INL is
also achieved for B grades. The output amplifier is capable of
sinking and sourcing 5mA, and the output voltage settles to
12-bits in less than 30
µ
s (typ.).
The MP7612 is equipped with a serial data (3-wire standard)
µ
-processor logic interface to reduce pin count, package size,
and board space.
Built using an advanced linear BiCMOS, these devices offer
rugged solutions that are latch-up free, and take advantage of
EXAR’s patented thin-film resistor process which exhibits excel-
lent long term stability and reliability.
SIMPLIFIED BLOCK DIAGRAM
V
RP
–
+
V
RP
V
RN
D
Q
12
DAC0
LAT0
XR XE
+
–
VO0
RST
XE0 - XE7
LD
12
V
RN
XE0
Not Used
8
8
D
Q
LAT7
XR XE
XE7
12
V
RP
DAC7
+
–
4 to 16 Decoder
SDI
LD
CLK
EN
D
LAT
Q
LAT
D
Q
EN
4
VO7
V
RN
D0 to D11
A0 to A3
16-Bit Shift Register
V
RP
V
EE
V
EE
V
CC
V
CC
AGND
AGND V
REF
DGND DV
DD
Tri-State Buffer
SDO
LD
Rev. 3.00
E1996
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538
z
(510) 668-7000
z
FAX (510) 668-7010
EXAR [ EXAR CORPORATION ]
