Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) TSSOP 16

General Description

The MAX5308/MAX5309 are 10-bit, eight channel, low-

power, voltage-output, digital-to-analog converters (DACs)

in a space-saving 16-pin TSSOP package. The wide

+2.7V to +5.5V supply voltage range and less than 215µA

(max) supply current per DAC are excellent for low-power

and low-voltage applications. The low 2nV-s glitch energy

of the MAX5308/MAX5309 makes them ideal for digital

control of fast-response, closed-loop systems.

The MAX5308 has a digital output (DOUT) that can be

used for daisy-chaining multiple devices. The MAX5309

has a hardware reset input (CLR) which clears all regis-

ters and DACs to zero. The MAX5308/MAX5309 have a

software shutdown feature that reduces the supply cur-

rent to 1µA. The MAX5308/MAX5309 feature a load

DAC (LDAC) function that updates the output of all

eight DACs simultaneously.

The 3-wire SPI™, QSPI™, MICROWIRE™ and DSP-

compatible serial interface allows the input and DAC

registers to be updated independently or simultaneous-

ly with a single software command. These devices use

a double-buffered design to minimize the digital-noise

feedthrough from the digital inputs to the outputs.

The MAX5308/MAX5309 operating temperature range

is from -40°C to +85°C.

Applications

Gain and Offset Adjustment

Power Amplifier Control

Process Control I/O Boards

Portable Instrumentation Equipment

Control of Optical Components

Features

♦ Eight Highly Integrated 10-Bit DACs in 16-Pin

TSSOP (6.4mm

5mm) Package

♦ Ultra-Low Glitch Energy <2nV-s

♦ Low Total Supply Current:

1.7mA (max) with V

REF

= V

= +5.5V

♦ +2.7V to +5.5V Wide Single-Supply Range

♦ Fast 5µs Settling Time

♦ Software-Selectable Shutdown Mode < 1µA

♦ 15MHz 3-Wire SPI, QSPI, and MICROWIRE-

Compatible Serial Interface

♦ Power-Up Reset to Zero Scale

MAX5308/MAX5309

Low-Power, Low-Glitch, Octal 10-Bit Voltage-

Output DACs with Serial Interface

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

SCLK CS

DOUT (CLR)

GND

OUT8

OUT7

OUT6

OUT5

TOP VIEW

MAX5308

MAX5309

16-TSSOP

DIN

LDAC

OUT2

REF

OUT1

OUT3

OUT4

() FOR MAX5309 ONLY

Pin Configuration

19-2151; Rev 0; 8/01

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.

PART TEMP. RANGE PIN-PACKAGE

MAX5308EUE -40°C to +85°C 16 TSSOP

MAX5309EUE -40°C to +85°C 16 TSSOP

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor, Corp.

Summary of content (15 pages)

PAGE 1
9-2151; Rev 0; 8/01 Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface The MAX5308/MAX5309 operating temperature range is from -40°C to +85°C. Features ♦ Eight Highly Integrated 10-Bit DACs in 16-Pin TSSOP (6.4mm ✕ 5mm) Package ♦ Ultra-Low Glitch Energy <2nV-s ♦ Low Total Supply Current: 1.7mA (max) with VREF = VDD = +5.5V ♦ +2.7V to +5.
PAGE 2
MAX5308/MAX5309 Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface ABSOLUTE MAXIMUM RATINGS VDD to GND ............................................................. -0.3V to +6V All Other Pins to GND.................................-0.3V to (VDD + 0.3V) Continuous Power Dissipation (TA = +70°C) 16-Pin TSSOP (derate 9.4mW/°C above +70°C) .........775mW Maximum Current into Any Pin .........................................±50mA Operating Temperature Range ..........................
PAGE 3
Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface (VDD = +2.7V to +5.5V, GND = 0, VREF = VDD, CL = 200pF, RL = 2kΩ, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DIGITAL INPUTS (SCLK, DIN, CS, LDAC, CLR—MAX5309) Input High Voltage VIH Input Low Voltage VIL Input Leakage Current IIN Input Capacitance CIN VDD = +5V ±10% 2.4 VDD = +3V ±10% 2.1 V VDD = +5V ±10% 0.
PAGE 4
MAX5308/MAX5309 Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface ELECTRICAL CHARACTERISTICS (continued) (VDD = +2.7V to +5.5V, GND = 0, VREF = VDD, CL = 200pF, RL = 2kΩ, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.
PAGE 5
Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface REFERENCE VOLTAGE INPUT FREQUENCY RESPONSE DIFFERENTIAL NONLINEARITY vs. DIGITAL INPUT CODE 0.15 MAX5308 toc02 0.040 MAX5308 toc01 0.20 0.030 DNL (LSB) 0.010 0 -0.010 0 -0.020 -0.05 -10 -15 VREF SWEPT 1VP-P RL = 2kΩ, CL = 200pF -0.030 -0.10 -20 -0.040 0 200 400 600 800 0 1000 200 400 600 800 0 1000 400 SUPPLY CURRENT vs. TEMPERATURE SUPPLY CURRENT vs. REFERENCE VOLTAGE SUPPLY CURRENT vs.
PAGE 6
Typical Operating Characteristics (continued) (VDD = +5V, TA = +25°C, unless otherwise noted.) REFERENCE FEEDTHROUGH AT 1kHz, RL = 2kΩ, CL = 200pF FULL-SCALE ERROR vs. LOAD CURRENT DAC-TO-DAC CROSSTALK MAX5308 toc12 MAX5308 toc11 MAX5308 toc10 0 -0.25 FULL-SCALE ERROR (LSB) MAX5308/MAX5309 Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface OUT1 2V/div REF, 2V/div -0.50 -0.75 0 -1.00 -1.25 -1.50 OUT1 1mVp-p VREF = +4.096V NORMALIZED TO 0.
PAGE 7
Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface PIN NAME 1 SCLK 2 DIN 3 FUNCTION Serial Clock Input. Serial data is loaded on the falling edge of SCLK. Serial Data Input LDAC Load DAC. LDAC is an asynchronous active-low input that updates the DAC outputs simultaneously. If LDAC is driven low, the DAC registers are transparent. 4 REF 5–12 OUT_ Analog Output Signal 13 GND Ground VDD Power Supply. Bypass VDD to GND with a 0.1µF capacitor.
PAGE 8
MAX5308/MAX5309 Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface Table 1. Serial Interface Configuration 16-BIT SERIAL WORD CONTROL BITS DATA BITS MSB LSB C3 C2 C1 C0 0 0 0 0 D09 D08 D07 D06 D05 D04 D03 D02 D01 D00 X X X X X X X X X X X X X X X X X X X X DESC. FUNCTION 0 0 NOP No Operation 0 RESET All Internal Registers. Power-down DACs, outputs 0 RESET pulled down with 100kΩ. Equivalent to software CLR.
PAGE 9
Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface MAX5308/MAX5309 VDD INPUT REGISTER 1 DAC REGISTER DAC 1 INPUT REGISTER 2 DAC REGISTER DAC 2 INPUT REGISTER 3 DAC REGISTER DAC 3 (MAX5309) CLR INPUT REGISTER 4 DAC REGISTER DAC 4 (MAX5308) DOUT INPUT REGISTER 5 DAC REGISTER DAC 5 INPUT REGISTER 6 DAC REGISTER DAC 6 INPUT REGISTER 7 DAC REGISTER DAC 7 INPUT REGISTER 8 DAC REGISTER DAC 8 MAX5308 MAX5309 OUT1 CS SCLK DIN SERIAL TO PARALLEL SHIFT REGISTER
PAGE 10
MAX5308/MAX5309 Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface Table 2. Serial Interface Power-Up and Shutdown Commands CONTROL BITS DATA BITS C3 C2 C1 C0 DAC DAC DAC DAC DAC DAC DAC DAC D03 D02 D01 D00 DESC. 8 7 6 5 4 3 2 1 FUNCTION 1 1 1 1 1 1 X X Power- Power-Up individual DAC Up buffers indicated by data in DAC1 through DAC8. A one indicates the DAC output is connected and active. A zero does not affect the DACs present state.
PAGE 11
Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface MAX5308/MAX5309 +5V SCLK SK DIN SO MISO* DOUT* MICROWIRE PORT MAX5308 DOUT* CS MOSI DIN SI* MAX5308 SS SCK SCLK SPI/QSPI PORT I/O I/O CS *THE DOUT-SI CONNECTION IS NOT REQUIRED FOR WRITING TO THE MAX5308, BUT MAY BE USED FOR TRANSMISSION VERIFICATION PURPOSES. CPOL = 0, CPHA = 0 *THE DOUT-MISO CONNECTION IS NOT REQUIRED FOR WRITING TO THE MAX5309, BUT MAY BE USED FOR TRANSMISSION VERIFICATION PURPOSES.
PAGE 12
MAX5308/MAX5309 Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface tCL SCLK X 1 2 tCH 3 4 16 X tDH tDS DIN X D15 D14 D13 D12 D1 D0 X D12* D1* D0* X tSDL tSDH DOUT X D15* D14* D13* tCSS tCSPWH tCSH CS tCLRPWL CLR *PREVIOUS INPUT DATA tLDACPWL LDAC tS ±0.5LSB VOUT_ Figure 4. Timing Diagram where D is the decimal value of the DACs’ binary input code.
PAGE 13
Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface DAC CONTENTS MSB LSB DAC CONTENTS MSB LSB ANALOG OUTPUT ANALOG OUTPUT 1111 1111 11 + VREF ( 1023 ) 1024 1111 1111 11 + VREF ( 511 ) 512 1000 0000 01 + VREF ( 513 1024 1000 0000 01 + VREF ( 1 ) 512 1000 0000 00 0111 1111 11 - VREF ( 512 ) 0000 0000 01 - VREF ( 512 ) 0000 0000 00 - VREF ( ) + VREF 512 + VREF ( ) = ———— 1024 2 1000 0000 00 0111 1111 11 0000 0000 01 REF ——— 0000 000
PAGE 14
MAX5308/MAX5309 Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface Simplified Block Diagram VDD CS INPUT REGISTERS SCLK DAC REGISTERS 10-BIT DAC8 OUTPUT BUFFER OUT1 DIN SHIFT REGISTER (MAX5309) CLR (MAX5308) DOUT DAC REGISTERS INPUT REGISTERS 10-BIT DAC8 OUTPUT BUFFER OUT8 LDAC MAX5308 MAX5309 GND Chip Information VREF R1 TRANSISTOR COUNT: 19,000 PROCESS TECHNOLOGY: BiCMOS R2 REF +5V MAX5308 MAX5309 VOUT DAC OUT -5V R2 = R1 Figure 7.
PAGE 15
Low-Power, Low-Glitch, Octal 10-Bit VoltageOutput DACs with Serial Interface TSSOP,NO PADS.EPS 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.