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PDF MAX5547 Data sheet ( Hoja de datos )
| Número de pieza | MAX5547 | |
| Descripción | Current-Sink Output DAC | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-3988; Rev 0; 2/06
Dual, 10-Bit, Current-Sink Output DAC
General Description
The MAX5547 dual, 10-bit, dual range, digital-to-analog
converter (DAC) sinks up to 3.6mA of current, making it
ideal for laser-driver-control applications. Parallel the
MAX5547 outputs to sink higher current (up to 7.2mA
max). Operating from a single +2.7V to +5.25V
supply, the MAX5547 typically consumes 1mA
(internal reference).
The MAX5547 operates from a precision +2.5V internal
4ppm/°C reference or an external reference in the
+2.45V to +2.55V range. The maximum full-scale cur-
rent-sink range is software programmable to 3.6mA or
1.2mA for each DAC. A 10MHz SPI™-compatible serial
interface configures the device.
The MAX5547 is available in a 3mm x 3mm x 0.8mm 8-
pin TDFN package and is specified over the -40°C to
+85°C extended temperature range.
Applications
Laser-Driver Control
Pin-Diode Bias Currents
Modulation Currents
Average Power
Extinction Ratios
+2.5V
+2.7V TO +5.25V
Features
♦ Dual Current-Sink DACs
♦ 10-Bit Resolution
♦ Two Software-Programmable Full-Scale Current
Ranges: 3.6mA or 1.2mA
♦ Parallelable Outputs for Up to 7.2mA (max)
♦ +2.5V Internal Reference Drifts Only 4ppm/°C
♦ +2.7V to +5.25V Single-Supply Operation
♦ INL: ±4 LSB (1.2mA Output)
♦ DNL: ±0.75 LSB (Guaranteed Monotonic)
♦ Low +0.8V Output Compliance
♦ Ultra-Small, 3mm x 3mm x 0.8mm, 8-Pin TDFN
Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP PKG
MARK CODE
MAX5547ETA -40°C to +85°C 8 TDFN-EP* APF T833-2
*EP = Exposed pad.
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
+3.3V
+3.3V
REF VDD
VCC
I
OUTA
MODSET
MAX5547
MAX3736
OUT-
OUT+
CS DIN SCLK
I
OUTB
BIASSET
GND GND
DIS
BIAS
BC_MON
FERRITE
BEAD
+3.3V
CS
REF
GND
MOSI SCLK
VCC
MICROCONTROLLER WITH ADC
I/O1 I/O2 I/O3
AIN0
AIN1
AIN2
+3.3V
TX_DISABLE
MOD-DEF1
MOD-DEF2
SPI is a trademark of Motorola, Inc.
________________________________________________________________ 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, Current-Sink Output DAC
Typical Operating Characteristics (continued)
(VDD = +3.0V, GND = 0, external reference = +2.5V, TA = +25°C, unless otherwise noted.)
DIFFERENTIAL NONLINEARITY
vs. DIGITAL INPUT CODE (3.6mA SETTING)
1.00
0.75
0.50
0.25
0
-0.25
-0.50
-0.75
-1.00
0
256 512 768
DIGITAL INPUT CODE
1024
ZERO-SCALE SINK CURRENT
vs. TEMPERATURE
20
15 3.6mA FULL SCALE
10
5
1.2mA FULL SCALE
0
-40
-15 10 35 60
TEMPERATURE (°C)
85
2.4960
INTERNAL REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
MAXIMUM INTEGRAL NONLINEARITY
vs. TEMPERATURE (3.6mA SETTING)
8
6
4
2
0
-40 -15 10 35 60
TEMPERATURE (°C)
85
FULL-SCALE SINK CURRENT
vs. TEMPERATURE (1.2mA SETTING)
1.210
1.208
1.206
1.204
1.202
1.200
1.198
1.196
-40
-15 10 35 60
TEMPERATURE (°C)
85
2.4940
INTERNAL REFERENCE
VOLTAGE vs. TEMPERATURE
2.4958
2.4956
2.4954
2.4952
2.4935
2.4930
2.4925
2.4950
2.5
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
2.4920
-40
-15 10 35 60
TEMPERATURE (°C)
85
MAXIMUM DIFFERENTIAL NONLINEARITY
vs. TEMPERATURE (3.6mA SETTING)
0.6
0.5
0.4
0.3
0.2
0.1
0
-40
-15 10 35 60
TEMPERATURE (°C)
85
FULL-SCALE SINK CURRENT
vs. TEMPERATURE (3.6mA SETTING)
3.80
3.75
3.70
3.65
3.60
3.55
3.50
-40
-15 10 35 60
TEMPERATURE (°C)
85
SUPPLY CURRENT vs. SUPPLY VOLTAGE
502
EXTERNAL REFERENCE = 2.5V,
CS = SCLK = DIN = GND
500
498
496
494
492
490
2.5
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
_______________________________________________________________________________________ 5
5 Page 
Dual, 10-Bit, Current-Sink Output DAC
+2.5V
+2.7V TO +5.25V
Functional Diagram
REF
+2.5V
REFERENCE
VDD
MAX5547
DAC
REGISTER A
DAC A
RANGE
CONTROL
3.6mA/1.2mA
FULL-SCALE CURRENT
OUTA
SERIAL INTERFACE
DAC
REGISTER B
CS DIN SCLK
GND
DACB
RANGE
CONTROL
3.6mA/1.2mA
FULL-SCALE CURRENT
OUTB
TOP VIEW
Pin Configuration
8 7 65
MAX5547
1 2 34
TDFN
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX5547.PDF ] | |
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