參數(shù)資料
型號(hào)： MX7847
英文描述： Complete.Dual.12-Bit Multiplying DAC with 8-Bit Bus Interface
中文描述： Complete.Dual.12位乘法DAC，具有8位總線接口
文件頁(yè)數(shù)： 1/14頁(yè)
文件大小： 326K
代理商： MX7847
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
General Description
The MX7841 contains eight 14-bit, voltage-output digi-
tal-to-analog converters (DACs). On-chip precision out-
put amplifiers provide the voltage outputs. The device
operates from ±15V supplies. Its bipolar output voltage
swing ranges from (V
SS
+ 2.5V) to (V
DD
- 2.5V) and is
achieved with no external components. The MX7841
has three pairs of differential reference inputs; two of
these pairs are connected to two DACs each, and a
third pair is connected to four DACs. The references
are independently controlled, providing different full-
scale output voltages to the respective DACs.
The MX7841 features double-buffered interface logic
with a 14-bit parallel data bus. Each DAC has an input
latch and a DAC latch. Data in the DAC latch sets the
output voltage. The eight input latches are addressed
with three address lines. Data is loaded to the input
latch with a single write instruction. An asynchronous
load input (
LDAC
) transfers data from the input latch to
the DAC latch. The
LDAC
input controls all DACs;
therefore, all DACs can be updated simultaneously by
asserting
LDAC
.
An asynchronous
CLR
input sets the output of all eight
DACs to the respective DUTGND input of the op amp.
Note that
CLR
is a CMOS input, which is powered by
V
DD
. All other logic inputs are TTL/CMOS compatible.
The MX7841 is pin-for-pin compatible with AD7841.
Applications
Automatic Test Equipment (ATE)
Industrial Process Controls
Arbitrary Function Generators
Avionics Equipment
Minimum Component Count Analog Systems
Digital Offset/Gain Adjustment
SONET Applications
Features
o
Full 14-Bit Performance Without Adjustments
o
Eight DACs in a Single Package
o
Buffered Voltage Outputs
o
Unipolar or Bipolar Voltage Swing of (V
SS
+ 2.5V)
to (V
DD
- 2.5V)
o
31μs Output Settling Time
o
Low Power Consumption: 8mA (typ)
o
Small 44-Pin MQFP Package
o
Double-Buffered Digital Inputs
o
Asynchronous Load Updates All DACs
Simultaneously
o
Asynchronous
CLR
Forces All DACs to
DUTGND_ _ Potential
M
Octal, 14-Bit Voltage-Output DAC
with Parallel Interface
________________________________________________________________
Maxim Integrated Products
1
DUTGNDGH
OUTH
REFGH-
REFGH+
CLR
DB13
DB12
DB11
DB10
DB9
DB8
DUTGNDAB
OUTA
REFAB-
REFAB+
V
DD
V
SS
LDAC
A2
A1
A0
CS
1
2
3
4
5
6
7
8
9
10
11
1
1
1
1
1
1
1
1
2
2
2
4
4
4
4
4
3
3
3
3
3
3
33
32
31
30
29
28
27
26
25
24
23
W
V
C
G
D
D
D
D
D
D
D
D
O
O
D
O
R
R
V
D
O
D
O
O
MQFP
MX7841
TOP VIEW
19-2953; Rev 0; 7/03
PART
MX7841BS
MX7841AS
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
PIN-
PACKAGE
44 MQFP
44 MQFP
Functional Diagram appears at end of data sheet.
Pin Configuration
Ordering Information
INL
(LSB)
±2
±4
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