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MAX5547ETA+T

P1-P3P4-P6P7-P9P10-P12
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
Features
o Dual Current-Sink DACs
o 10-Bit Resolution
o Two Software-Programmable Full-Scale Current
Ranges: 3.6mA or 1.2mA
o Parallelable Outputs for Up to 7.2mA (max)
o +2.5V Internal Reference Drifts Only 4ppm/°C
o +2.7V to +5.25V Single-Supply Operation
o INL: ±1 LSB
o DNL: ±0.75 LSB (Guaranteed Monotonic)
o Low +0.8V Output Compliance
o Ultra-Small, 3mm x 3mm x 0.8mm, 8-Pin TDFN
Package
MAX5547
Dual, 10-Bit, Current-Sink Output DAC
________________________________________________________________
Maxim Integrated Products
1
19-3988; Rev 2; 7/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
+2.7V TO +5.25V
+2.5V
+3.3V
OUTA
OUTB
DIN
SCLK
MICROCONTROLLER WITH ADC
REF
I
I
BIASSET
MODSET
DIS
BC_MON
OUT-
OUT+
BIAS
AIN0
AIN1
AIN2
CS
MOSI SCLK
GND
GND
V
CC
REF
FERRITE
BEAD
I/O1
I/O2
I/O3
TX_DISABLE
MOD-DEF1
MOD-DEF2
+3.3V
GND
V
CC
+3.3V
+3.3V
MAX5547 MAX3736
V
DD
CS
Typical Operating Circuit
PART
TEMP
RANGE
PIN-PACKAGE TOP MARK
MAX5547ETA+ -40°C to +85°C 8 TDFN-EP* APF
SPI is a trademark of Motorola, Inc.
*
EP = Exposed pad.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
MAX5547
Dual, 10-Bit, Current-Sink Output DAC
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to GND .............................................................-0.3V to +6V
OUTA, OUTB, REF to GND ........................-0.3V to (V
DD
+ 0.3V)
SCLK, DIN, CS to GND ............................................-0.3V to +6V
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 18.2mW/°C above +70°C) .......1454.5mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.25V, V
GND
= 0V, external reference = +2.5V, output voltage = +2.0V, T
A
= -40°C to +85°C. Typical values are at
V
DD
= +3.0V, and T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
STATIC PERFORMANCE—ANALOG SECTION
Resolution 10 Bits
I
OUT
_ = 1.2mA ±1 ±6
Integral Nonlinearity (Note 2) INL
I
OUT
_ = 3.6mA ±1 ±6
LSB
Differential Nonlinearity DNL Guaranteed monotonic ±0.75 LSB
Offset Error OE Code = 030h, T
A
= +25°C ±9 LSB
Offset Temperature Coefficent (Note 3) 0.05 0.15 LSB/°C
I
OUT
_ = 1.2mA ±0.1 ±3
Gain Error GE
Measured from code
030h to 3FFh
I
OUT
_ = 3.6mA ±0.1 ±5.5
%
I
OUT_
= 1.2mA 15
Gain Temperature Coefficient
I
OUT_
= 3.6mA 25
ppm/°C
Line Regulation V
DD
= +2.7V to +5.25V 0.8 LSB/V
Output Crosstalk
OUTA = midscale, OUTB switching from
030h to 3FFh
54 dB
REFERENCE
Internal-Reference Voltage V
REF
T
A
= +25°C 2.48 2.5 2.52 V
Internal-Reference Temperature
Coefficient
(Note 4) 4 30 ppm/°C
Internal-Reference Load
Regulation
0µA < I
REF
< +300µA 1 3.5 Ω
Internal-Reference Power-Up
Time
C
REF
= 1µF, to 0.05% 0.55 ms
Internal-Reference Sink Current 50 µA
Internal-Reference Source
Current
300 µA
REF Capacitive Load (Note 4) 0.1 10.0 µF
Reference Line Regulation V
DD
= +2.7V to +5.25V 25 µV/V
f = 0.1Hz to 10Hz 10
Internal-Reference Noise
f = 10Hz to 10kHz 27
µV
RMS
External-Reference Range V
REF
2.45 2.55 V
MAX5547
Dual, 10-Bit, Current-Sink Output DAC
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.25V, V
GND
= 0V, external reference = +2.5V, output voltage = +2.0V, T
A
= -40°C to +85°C. Typical values are at
V
DD
= +3.0V, and T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
External-Reference Input
Impedance
R
REF
90 kΩ
DAC OUTPUTS
Code = 030h 50
1.2mA low-current
range
Code = 3FFh 1170 1200 1230
Code = 030h 150
Output Current (Note 5) I
OUT
_
3.6mA high-current
range
Code = 3FFh 3400 3600 3800
µA
1.2mA full-scale current 1.17
LSB Size
3.6mA full-scale current 3.52
µA
Current-Source Compliance
Voltage Range
I
OUT
_ = full-scale (Note 6) 0.8 V
I
OUT
_ = 1.2mA, V
OUT
= +1V to +5.25V 600
Output Impedance at Full-Scale
Current
I
OUT
_ = 3.6mA, V
OUT
= +1V to +5.25V 180
kΩ
DYNAMIC PERFORMANCE
Settling Time t
S
To 1% (Note 7) 10 µs
f = 0.1Hz to 10Hz 0.05
Output Noise I
RMS
f = 10Hz to 10kHz 0.35
LSB
RMS
Supply Feedthrough 100mV, 1kHz signal added to V
DD
0.85 LSB/V
Digital Feedthrough R
LOAD
= 500Ω, C
LOAD
= 100pF 2 pA·s
Digital-to-Analog Glitch Impulse R
LOAD
= 500Ω, C
LOAD
= 100pF 16 pA·s
DAC-to-DAC Full-Scale Current
Matching
2%
POWER SUPPLIES
Supply Voltage V
DD
+2.70 +5.25 V
Internal reference
mode
1.1 2
Supply Current I
DD
V
DD
= +5.25V, no load,
SCLK not switching
External reference
mode
0.75 1.5
mA
LOGIC AND CONTROL INPUTS
Input High Voltage V
IH
(Note 8)
0.7 x
V
DD
V
Input Low Voltage V
IL
(Note 8) 0.8 V
Input Hysteresis V
HYS
0.05 x
V
DD
V
Input Capacitance C
IN
10 pF
Input Leakage Current I
IN
±1 µA
P1-P3P4-P6P7-P9P10-P12

MAX5547ETA+T

Mfr. #:
Buy MAX5547ETA+T
Manufacturer:
Maxim Integrated
Description:
Digital to Analog Converters - DAC 10-Bit 2Ch Precision DAC
Lifecycle:
New from this manufacturer.
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