MAX5548ETE+ Maxim Integrated Products, MAX5548ETE+ Datasheet

IC DAC 8BIT DUAL 30MA 16-TQFN

MAX5548ETE+

Manufacturer Part Number
MAX5548ETE+
Description
IC DAC 8BIT DUAL 30MA 16-TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX5548ETE+

Settling Time
30µs
Number Of Bits
8
Data Interface
Serial
Number Of Converters
2
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power Dissipation (max)
-
The MAX5548 dual, 8-bit, digital-to-analog converter
(DAC) features high-output-current capability. The
MAX5548 sources up to 30mA per DAC, making it ideal
for PIN diode biasing applications. Outputs can also be
paralleled for high-current applications (up to 60mA
typ). Operating from a single +2.7V to +5.25V supply,
the MAX5548 typically consumes 1.5mA per DAC in
normal operation and less than 1µA (max) in shutdown
mode. The MAX5548 also features low output leakage
current in shutdown mode (±1µA max) that is essential
to ensure that the external PIN diodes are off.
Additional features include an integrated +1.25V
bandgap reference, and a control amplifier to ensure
high accuracy and low-noise performance. A separate
reference input (REFIN) allows for the use of an external
reference source, such as the MAX6126, for improved
gain accuracy. A pin-selectable I
serial interface provides optimum flexibility for the
MAX5548. The maximum programmable output current
value is set using software and an adjustment resistor.
The MAX5548 is available in a 3mm x 3mm, 16-pin, thin
QFN package, and is specified over the extended
(-40°C to +85°C) temperature range.
19-3836; Rev 1; 12/05
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.
SPI is a trademark of Motorola, Inc.
Pin Configuration appears at end of data sheet.
PIN Diode Biasing
RF Attenuator Control
VCO Tuning
________________________________________________________________ Maxim Integrated Products
General Description
2
C-/SPI™-compatible
Applications
Dual, 8-Bit, Programmable, 30mA
High-Output-Current DAC
♦ Pin-Selectable I
♦ Guaranteed Low Output Leakage Current in
♦ Guaranteed Monotonic over Extended
♦ Dual Outputs for Balanced Systems
♦ Current Outputs Source Up to 30mA per DAC
♦ Parallelable Outputs for 60mA Applications
♦ Output Stable with RF Filters
♦ Internal or External Reference Capability
♦ Digital Output (DOUT) Available for Daisy
♦ +2.7V to +5.25V Single-Supply Operation
♦ 16-Pin (3mm x 3mm) Thin QFN Package
♦ Programmable Output Current Range Set by
*EP = Exposed paddle.
Note: Device is specified over the -40°C to +85°C operating
range.
MAX5548ETE 16 Thin QFN-EP*
Shutdown (±1µA max)
Temperature Range
Chaining in SPI Mode
Software and Adjustment Resistor
SPI/I2C
PART
SCLK/SCL
DAC REGISTER A
+1.25V
16-BIT INPUT REGISTER
REF
DIN/SDA
PIN-
PACKAGE
DAC REGISTER B
CS/A0
BUFFER
REFIN
2
DOUT/A1
C- or SPI-Compatible Interface
Ordering Information
8-BIT CURRENT-STEERING
Functional Diagram
8-BIT CURRENT-STEERING
DAC B
DAC A
PKG
CODE
T1633F-3
GND
MAX5548
Features
V
DD
V
DD
P
P
MARK
FSADJA
OUTA
OUTB
FSADJB
TOP
ACY
1

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MAX5548ETE+ Summary of contents

Page 1

... RF Attenuator Control VCO Tuning SPI is a trademark of Motorola, Inc. Pin Configuration appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC ♦ ...

Page 2

Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to +6V DD OUTA, OUTB to GND .................................-0. REFIN CS/AO, DOUT/AI, SPI/I2C, FSADJA, FSADJB to GND ......................................-0. SCLK/SCL, DIN/SDA ................................................-0.3V to +6V Continuous ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.25V, GND = -40°C to +85°C, unless otherwise noted. Typical values are at V SCLK/SCL A PARAMETER SYMBOL DAC-to-DAC Current Matching Wake-Up Time POWER SUPPLIES ...

Page 4

Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.25V, GND = -40°C to +85°C, unless otherwise noted. Typical values are at V SCLK/SCL A PARAMETER SYMBOL Setup ...

Page 5

GND = +1.25V, internal reference REFIN INL vs. CODE 1.00 0.75 0.50 0.25 0 -0.25 -0.50 -0.75 -1. 128 160 192 224 256 CODE DNL vs. TEMPERATURE 0.1000 ...

Page 6

Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC (V = +3.0V, GND = +1.25V, internal reference REFIN GLITCH IMPULSE 40ns/div SHUTDOWN CURRENT vs. TEMPERATURE 620 NO LOAD, CODE = 0x00 520 420 V ...

Page 7

GND = +1.25V, internal reference REFIN SUPPLY CURRENT vs. SUPPLY VOLTAGE 2.80 NO LOAD, CODE = 0x00 2.75 INTERNAL REFERENCE 2.70 2.65 EXTERNAL REFERENCE 2.60 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) ...

Page 8

Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC PIN NAME 1 SCLK/SCL Serial Clock Input. Connect SCL DIN/SDA Serial Data Input. Connect SDA to V Chip-Select Input in SPI Mode/Address Select CS/ GND ...

Page 9

C mode) and DIN, SCLK, and CS (SPI 2 and SCL (I mode) facilitate communication between the MAX5548 and the master. The serial interface remains active in shutdown. C Compatibility (SPI/ I2C = GND The MAX5548 is compatible ...

Page 10

Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC S t RDA SDA t FDA SU:STA HD:STA SCL t RCL t HIGH 2 Figure Serial-Interface Timing Diagram Early STOP Conditions The MAX5548 recognizes a STOP condition at ...

Page 11

S SDA SCL Figure 5. Acknowledge Condition Table 3. Write Operation S T ADDRESS A BYTE R R/ W** T Master SDA 1 Slave SDA *S1 and S0 are subbits. Set ...

Page 12

Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC CSO CSS SCLK DIN MSB t CSE DOUT Figure 6. SPI-Interface Timing Diagram CS SCLK DIN C5 C4 Figure 7. SPI-Interface Format Applications Information ...

Page 13

Table 4. Command Summary SERIAL DATA INPUT D7–D0, S1 AND ...

Page 14

Dual, 8-Bit, Programmable, 30mA High-Output-Current DAC CONTROLLER DEVICE Figure 8. Daisy-Chain Configuration Power Sequencing Ensure that the voltage applied to REFIN does not exceed V at any time. If proper power sequencing is DD not possible, connect an external Schottky ...

Page 15

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2005 Maxim Integrated Products ...

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