MAX5547_09 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Dual, 10-Bit, Current-Sink Output DAC

19-3988; Rev 2; 7/09
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
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
Ordering Information
PART
TEMP
RANGE
PIN-PACKAGE TOP MARK
MAX5547ETA+ -40°C to +85°C 8 TDFN-EP*
APF
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
+3.3V
+3.3V
REF
VDD
VCC
I
OUTA
MODSET
OUT-
MAX5547
MAX3736
OUT+
CS DIN SCLK
I
OUTB
BIASSET
GND
GND
DIS
BIAS
BC_MON
FERRITE
BEAD
+3.3V
CS
REF
GND
MOSI SCLK
VCC
AIN0
MICROCONTROLLER WITH ADC
AIN1
AIN2
I/O1
I/O2 I/O3
+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 Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.