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PDF MX7847BQ Data sheet ( Hoja de datos )
| Número de pieza | MX7847BQ | |
| Descripción | Complete / Dual / 12-Bit Multiplying DACs | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-0158; Rev 0; 7/93
Complete, Dual, 12-Bit
Multiplying DACs
_______________General Description
The MX7837/MX7847 are dual, 12-bit, multiplying, volt-
age-output digital-to-analog converters (DACs). Each
DAC has an output amplifier and a feedback resistor.
The output amplifier is capable of developing ±10V
across a 2kΩ load. The amplifier feedback resistor is
internally connected to VOUT on the MX7847. No exter-
nal trims are required to achieve full 12-bit performance
over the entire operating temperature range.
The MX7847 has a 12-bit parallel data input, whereas
the MX7837 operates with a double-buffered 8-bit-bus
interface that loads data in two write operations. All
logic signals are level triggered and are TTL and CMOS
compatible. Fast timing specifications make these
DACs compatible with most microprocessors.
________________________Applications
Small Component-Count Analog Systems
Digital Offset/Gain Adjustments
Industrial Process Control
Function Generators
Automatic Test Equipment
Automatic Calibration
Machine and Motion Control Systems
Waveform Reconstruction
Synchro Applications
_________________Pin Configurations
TOP VIEW
CS 1
RFBA 2
VREFA 3
VOUTA 4
AGNDA 5
VDD 6
VSS 7
AGNDB 8
VOUTB 9
VREFB 10
DGND 11
RFBB 12
MX7847 on last page.
MX7837
24 DB0/DB8
23 DB1/DB9
22 DB2/DB10
21 DB3/DB11
20 DB4
19 DB5
18 DB6
17 DB7
16 A0
15 A1
14 LDAC
13 WR
DIP/SO
____________________________Features
o Two 12-Bit Multiplying DACs with Buffered
Voltage Output
o Specified with ±12V or ±15V Supplies
o No External Adjustments Required
o Fast Timing Specifications
o 24-Pin DIP and SO Packages
o 12-Bit Parallel Interface (MX7847)
8-Bit + 4-Bit Interface (MX7837)
______________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
ERROR
(LSB)
MX7837JN
MX7837KN
MX7837JR
MX7837KR
MX7837C/D
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
24 Narrow Plastic DIP
24 Narrow Plastic DIP
24 Wide SO
24 Wide SO
Dice*
±1
±1/2
±1
±1/2
±1
Ordering Information continued on last page.
* Contact factory for availability and processing to MIL-STD-883.
_________Typical Operating Circuits
VDD
VREFA
VREFB
DB0
DB7
LDAC
CS
WR
A0
A1
CONTROL
LOGIC
DGND
MX7847 on last page.
MSB
INPUT
LATCH
4
LSB
INPUT
LATCH
8
DAC LATCH A
12
DAC A
DAC B
12
DAC LATCH B
48
MSB LSB
INPUT INPUT
LATCH LATCH
MX7837
RFBA
VOUTA
AGNDA
RFBB
VOUTB
AGNDB
VSS
________________________________________________________________ Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.
1 page  
Complete, Dual, 12-Bit
Multiplying DACs
____________________________Typical Operating Characteristics (continued)
(TA = +25°C, VDD = 15V, VSS = -15V, RL = 2kΩ, CL = 100pF, unless otherwise noted.)
SMALL-SIGNAL PULSE RESPONSE
LARGE-SIGNAL PULSE RESPONSE
AGNDA
A AGNDA
A
A = VOUTA, 50mV/div
TIMEBASE = 2µs/div
VREFA = ±100mV SQUARE WAVE
A = VOUTA, 5V/div
TIMEBASE = 2µs/div
VREFA = ±10V SQUARE WAVE
______________________________________________________________Pin Description
PIN
MX7837 MX7847
1–
–1
2–
–2
33
44
55
66
77
88
99
10 10
11 11
12 –
– 12
13 13
14
–
15
16
17-20
–
14-24
–
–
–
21-24
–
NAME
CS
CSA
RFBA
CSB
VREFA
VOUTA
AGNDA
VDD
VSS
AGNDB
VOUTB
VREFB
DGND
RFBB
DB11
WR
LDAC
DB10-DB0
A1
A0
DB7-DB4
DB3/DB11-
DB0/DB8
FUNCTION
Chip Select – active-low logic input
Chip-Select Input for DAC A – active-low logic input
Amplifier Feedback Resistor for DAC A
Chip-Select Input for DAC B – active-low logic input
Reference Input Voltage for DAC A
Analog Output Voltage from DAC A
Analog Ground for DAC A
Positive Power Supply
Negative Power Supply
Analog Ground for DAC B
Analog Output Voltage from DAC B
Reference Input Voltage for DAC B
Digital Ground
Amplifier Feedback Resistor for DAC B
Data Bit 11 (MSB)
Write Input – active-low logic input (MX7837); positive-edge-triggered input used with
CSA and CSB (MX7847)
Asynchronous Load – DAC input, active-low
Data Bit 10 to Data Bit 0 (LSB)
Address Input – most significant address input for input latches
Address Input – least significant address input for input latches
Data Bit 7 to Data Bit 4
Data Bit 3 to Data Bit 0 (LSB), or Data Bit 11 (MSB) to Data Bit 8
_______________________________________________________________________________________ 5
5 Page 
Complete, Dual, 12-Bit
Multiplying DACs
________________________________________________________Package Information
D1
A A2
A1
L
D
e
B
A3
α
B1
E
E1
eA
eB
INCHES
DIM MIN
MAX
MILLIMETERS
MIN MAX
A – 0.200 –
5.08
A1 0.015
–
0.38
–
A2 0.125 0.150 3.18 3.81
A3 0.055 0.080 1.40 2.03
B 0.016 0.022 0.41 0.56
B1 0.050 0.065 1.27 1.65
C 0.008 0.012 0.20 0.30
D 1.235 1.265 31.37 32.13
D1 0.050 0.080 1.27 2.03
E 0.300 0.325 7.62 8.26
E1 0.240 0.280 6.10 7.11
e 0.100 BSC
2.54 BSC
eA 0.300 BSC
eB –
0.400
L 0.115 0.150
7.62 BSC
– 10.16
2.92 3.81
α 0˚ 15˚ 0˚ 15˚
21-337A
24-PIN PLASTIC
C DUAL-IN-LINE
(NARROW)
PACKAGE
D
eB
EH
A
A1
h x 45˚
0.127mm
0.004in.
C
L
INCHES
DIM
MIN MAX
A 0.093 0.104
A1 0.004 0.012
B 0.014 0.019
C 0.009 0.013
D 0.598 0.614
E 0.291 0.299
e 0.050 BSC
H 0.394 0.419
h 0.010 0.030
L 0.016 0.050
α 0˚
8˚
MILLIMETERS
MIN MAX
2.35 2.65
0.10 0.30
0.35 0.49
0.23 0.32
15.20 15.60
7.40 7.60
1.27 BSC
10.00 10.65
0.25 0.75
0.40 1.27
0˚ 8˚
21-338A
α
24-PIN PLASTIC
SMALL-OUTLINE
PACKAGE
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MX7847BQ.PDF ] | |
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