MAX5222EKA-TG05 Maxim Integrated, MAX5222EKA-TG05 Datasheet

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MAX5222EKA-TG05

Manufacturer Part Number
MAX5222EKA-TG05
Description
Digital to Analog Converters - DAC
Manufacturer
Maxim Integrated
Datasheet

Specifications of MAX5222EKA-TG05

Number Of Converters
2
Resolution
8 bit
Interface Type
QSPI, SPI, Serial (3-Wire, Microwire)
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Supply Voltage - Max
5.5 V
Supply Voltage - Min
2.7 V
The MAX5222 contains two 8-bit, buffered, voltage-out-
put digital-to-analog converters (DAC A and DAC B) in a
small 8-pin SOT23 package. Both DAC outputs can
source and sink 1mA to within 100mV of ground and
V
+5.5V supply.
The device uses a 3-wire serial interface, which oper-
ates at clock rates up to 25MHz and is compatible with
SPI™, QSPI™, and MICROWIRE™ interface standards.
The serial input shift register is 16 bits long and con-
sists of 8 bits of DAC input data and 8 bits for DAC
selection and shutdown control. DAC registers can be
loaded independently or in parallel at the positive edge
of CS.
The MAX5222’s ultra-low power consumption and tiny
8-pin SOT23 package make it ideal for portable and
battery-powered applications. Supply current is less
than 1mA and drops below 1µA in shutdown mode. In
addition, the reference input is disconnected from the
REF pin during shutdown, further reducing the system’s
total power consumption.
________________________Applications
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
19-1720; Rev 0; 4/00
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
DD
. The MAX5222 operates with a single +2.7V to
TOP VIEW
Digital Gain and Offset Adjustment
Programmable Current Source
Programmable Voltage Source
Power-Amp Bias Control
VCO Tuning
SCLK
GND
V
CS
DD
________________________________________________________________ Maxim Integrated Products
1
2
3
4
General Description
SOT23-8
MAX5222
Pin Configuration
8
7
6
5
DIN
REF
OUTB
OUTA
Dual, 8-Bit, Voltage-Output
Serial DAC in 8-Pin SOT23
o Operates from a Single +2.7V to +5.5V Supply
o Tiny 8-Pin SOT23 Package (3mm
o Dual Buffered Voltage Output
o Low Power Consumption
o Programmable Shutdown Mode
o 25MHz, 3-Wire Serial Interface
o SPI, QSPI, and MICROWIRE Compatible
MAX5222EKA-T
SCLK
CS
4
1
0.4mA Operating Current
<1µA Shutdown Current
PART
8
DIN
0.22µF
LATCH
LATCH
DAC
DAC
TEMP. RANGE
-40°C to +85°C
A
B
3
Ordering Information
2
V
DD
Functional Diagram
GND
7
DAC A
DAC B
REF
MAX5222
0.1µF
(OPTIONAL)
8 SOT23-8
PIN-PACKAGE
3mm)
Features
OUTA
5
OUTB
6
V
V
OUTA
OUTB
1

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MAX5222EKA-TG05 Summary of contents

Page 1

... Operates from a Single +2.7V to +5.5V Supply o Tiny 8-Pin SOT23 Package (3mm o Dual Buffered Voltage Output o Low Power Consumption 0.4mA Operating Current <1µA Shutdown Current o Programmable Shutdown Mode o 25MHz, 3-Wire Serial Interface o SPI, QSPI, and MICROWIRE Compatible PART MAX5222EKA-T 8 SCLK 4 8 DIN REF ...

Page 2

Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SOT23 ABSOLUTE MAXIMUM RATINGS V to GND ............................................................. -0.3V to +6V DD All Other Pins to GND (Note 1).................. -0. Continuous Power Dissipation (T = +70°C) A 8-Pin SOT23 (derate 8.7mW/°C ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V, REF = PARAMETER SYMBOL DYNAMIC PERFORMANCE Voltage-Output Slew Rate SR Voltage-Output Settling Time Digital Feedthrough and Crosstalk POWER SUPPLY Supply Voltage Range V Supply Current I ...

Page 4

Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SOT23 __________________________________________Typical Operating Characteristics (V = +3V +25°C, unless otherwise noted OUTPUT VOLTAGE vs. OUTPUT SOURCE CURRENT (V = 3V) DD 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 ...

Page 5

T = +25°C, unless otherwise noted LARGE-SIGNAL OUTPUT STEP RESPONSE 3V 10kΩ, C REF DD L CH1 CH2 2µs/div POWER-UP OUTPUT GLITCH CH1 CH2 100µs/div V = CHANGES BETWEEN ...

Page 6

Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SOT23 (V = +3V +25°C, unless otherwise noted NEGATIVE SETTLING TIME CH1 CH2 V = 3V, REF = ALL BITS OFF TO ALL ...

Page 7

Description PIN NAME – — – Chip Select, Active Low. Enables data to be shifted into the 16-bit shift register. Programming commands are executed at the rising edge of 2 GND Ground 3 V Positive Power ...

Page 8

Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SOT23 REF GND SHOWN FOR ALL 1s ON DAC Figure 1. DAC Simplified Circuit Diagram – — – An active-low chip select ( ...

Page 9

CS SCLK DIN UB1 UB2 UB3 SB (CONTROL BYTE) Figure 2. 3-Wire Serial-Interface Timing Diagram Table 2. Serial-Interface Programming Commands CONTROL UB1 UB2 UB3 SB SA UB4 ...

Page 10

Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SOT23 CS t CSS t CH SCLK DIN Figure 3. Detailed Serial-Interface Timing Diagram The digital inputs are compatible with CMOS logic. Supply current increases slightly when toggling the ...

Page 11

Applications Information The MAX5222 is specified for single-supply operation with V ranging from 2.7V to 5.5V, covering all com- DD monly used supply voltages in 3V and 5V systems. An internal power-on reset circuit forces the outputs to zero scale ...

Page 12

... 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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