|
|
PDF MAX5821 Data sheet ( Hoja de datos )
| Número de pieza | MAX5821 | |
| Descripción | Dual / 10-Bit / Low-Power / 2-Wire / Serial Voltage-Output DAC | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX5821 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
19-2316; Rev 0; 1/02
230
Dual, 10-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
General Description
The MAX5821 is a dual, 10-bit voltage-output, digital-to-
analog converter (DAC) with an I2C™-compatible,
2-wire interface that operates at clock rates up to
400kHz. The device operates from a single 2.7V to 5.5V
supply 115µA at VDD = 3.6V. A power-down mode
decreases current consumption to less than 1µA. The
MAX5821 features three software-selectable power-
down output impedances: 100kΩ, 1kΩ, and high
impedance. Other features include internal precision
Rail-to-Rail® output buffers and a power-on reset (POR)
circuit that powers up the DAC in the 100kΩ power-
down mode.
The MAX5821 features a double-buffered I2C-compati-
ble serial interface that allows multiple devices to share
a single bus. All logic inputs are CMOS-logic compati-
ble and buffered with Schmitt triggers, allowing direct
interfacing to optocoupled and transformer-isolated
interfaces. The MAX5821 minimizes digital noise
feedthrough by disconnecting the clock (SCL) signal
from the rest of the device when an address mismatch
is detected.
The MAX5821 is specified over the extended tempera-
ture range of -40°C to +85°C and is available in a
miniature 8-pin µMAX package. Refer to the MAX5822
data sheet for the 12-bit version.
Applications
Digital Gain and Offset Adjustments
Programmable Voltage and Current Sources
Programmable Attenuation
VCO/Varactor Diode Control
Low-Cost Instrumentation
Battery-Operated Instrumentation
Pin Configuration
Features
o Ultra-Low Supply Current
115µA at VDD = 3.6V
135µA at VDD = 5.5V
o 300nA Low-Power Power-Down Mode
o Single 2.7V to 5.5V Supply Voltage
o Fast 400kHz I2C-Compatible 2-Wire
Serial Interface
o Schmitt-Trigger Inputs for Direct Interfacing
to Optocouplers
o Rail-to-Rail Output Buffer Amplifiers
o Three Software-Selectable Power-Down Output
Impedances
100kΩ, 1kΩ, and High Impedance
o Read-Back Mode for Bus and Data Checking
o Power-On Reset to Zero
o 8-Pin µMAX Package
Ordering Information
PART
MAX5821LEUA
MAX5821MEUA
TEMP
RANGE
-40oC to +85oC
-40oC to +85oC
PIN-
PACKAGE
8 µMAX
8 µMAX
ADDRESS
0111 00X
1011 00X
Typical Operating Circuit
VDD
µC
SDA SCL
RP
RP
VDD
TOP VIEW
VDD 1
GND 2
ADD 3
SCL 4
MAX5821
8 OUTB
7 OUTA
6 REF
5 SDA
µMAX
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
I2C is a trademark of Philips Corp.
RS
SCL VDD
RS
SDA MAX5821 OUTA
REF OUTB
RS
SCL VDD
RS SDA MAX5821 OUTA
REF OUTB
REF
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
Dual, 10-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
(VDD = +5V, RL = 5kΩ, TA = +25°C.)
ZERO-CODE ERROR
vs. SUPPLY VOLTAGE
10
8
6
4
2
0
2.7
NO LOAD
3.4 4.1 4.8
SUPPLY VOLTAGE (V)
5.5
GAIN ERROR vs. TEMPERATURE
-2.0
-1.6
-1.2
-0.8
-0.4
0
-40
-15 10 35
TEMPERATURE (°C)
NO LOAD
60 85
SUPPLY CURRENT vs. INPUT CODE
180
Typical Operating Characteristics (continued)
ZERO-CODE ERROR
vs. TEMPERATURE
10
8
6
4
2
0
-40
NO LOAD
-15 10 35 60
TEMPERATURE (°C)
85
DAC OUTPUT VOLTAGE
vs. OUTPUT SOURCE CURRENT (NOTE 6)
6
5
4
3
2
1
CODE = 3FF hex
0
02468
OUTPUT SOURCE CURRENT (mA)
10
SUPPLY CURRENT vs. TEMPERATURE
180
GAIN ERROR vs. SUPPLY VOLTAGE
-2.0
-1.6
-1.2
-0.8
-0.4
0
2.7
NO LOAD
3.4 4.1 4.8
SUPPLY VOLTAGE (V)
5.5
DAC OUTPUT VOLTAGE
vs. OUTPUT SINK CURRENT (NOTE 6)
2.5
2.0
1.5 CODE = 100 hex
1.0
0.5
0
0
180
2468
OUTPUT SINK CURRENT (mA)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
10
160 160
160
140 140
140
120
100
0
205 410 615 820 1024
INPUT CODE
120
NO LOAD
CODE = 3FF hex
100
-40 -15 10
35
TEMPERATURE (°C)
60
85
120
100
2.7
CODE = 3FF hex
NO LOAD
3.4 4.1 4.8
SUPPLY VOLTAGE (V)
5.5
_______________________________________________________________________________________ 5
5 Page 
Dual, 10-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
impedance. Bypass VDD with a 0.1µF capacitor to
ground as close to the device as possible.
Chip Information
TRANSISTOR COUNT: 11,186
PROCESS: BiCMOS
Table 3. Command Byte Definitions
SERIAL DATA INPUT
C3 C2 C1 C0
D9
D8
D7
0
0
0
0
DAC
DATA
DAC
DATA
DAC
DATA
0
0
0
1
DAC
DATA
DAC
DATA
DAC
DATA
0
1
0
0
DAC
DATA
DAC
DATA
DAC
DATA
0
1
0
1
DAC
DATA
DAC
DATA
DAC
DATA
1
0
0
0
DAC
DATA
DAC
DATA
DAC
DATA
1
0
0
1
DAC
DATA
DAC
DATA
DAC
DATA
1
1
0
0
DAC
DATA
DAC
DATA
DAC
DATA
1 1 0 1 DAC DAC DAC
DATA DATA DATA
1110
X
X
X
1111
0
0
0
1111
0
0
0
1111
0
0
1
D6
DAC
DATA
DAC
DATA
DAC
DATA
DAC
DATA
DAC
DATA
DAC
DATA
DAC
DATA
DAC
DATA
X
0
1
0
FUNCTION
Load DAC A input and DAC registers with new data.
Contents of DAC B input registers are transferred to the
DAC register. All outputs are updated.
Load DAC B input and DAC registers with new data.
Contents of DAC A input registers are transferred to the
DAC register. All outputs are updated.
Load DAC A input register with new data. DAC outputs
remain unchanged.
Load DAC B input register with new data. DAC outputs
remain unchanged.
Data in all input registers is transferred to respective DAC
registers. All DAC outputs are updated simultaneously.
New data is loaded into DAC A input register.
Data in all input registers is transferred to respective DAC
registers. All DAC outputs are updated simultaneously.
New data is loaded into DAC B input register.
Load all DACs with new data and update all DAC outputs
simultaneously. Both input and DAC registers are updated
with new data.
Load all input registers with new data. DAC outputs
remain unchanged.
Update all DAC outputs simultaneously. Device ignores
D9–D6. Do not send the data byte.
Extended command mode. The next word writes to the
power-down registers (Extended Command Mode).
Read DAC A data. The device expects an Sr condition
followed by an address word with R/W = 1.
Read DAC B data. The device expects an Sr condition
followed by an address word with R/W = 1.
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MAX5821.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX5820 | Serial Voltage-Output DAC |  Maxim Integrated Products |
| MAX5821 | Dual / 10-Bit / Low-Power / 2-Wire / Serial Voltage-Output DAC | Maxim Integrated |
| MAX5822 | Dual / 12-Bit / Low-Power / 2-Wire / Serial Voltage-Output DAC | Maxim Integrated |
| MAX5823 | (MAX5823 - MAX5825) 8-/10-/12-Bit Buffered Output DACs | Maxim Integrated |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |