Datasheet

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

General Description

The MAX5115/MAX5116 quad, 8-bit, digital-to-analog

converters (DACs) feature nonvolatile registers. These

nonvolatile registers store the DAC operating modes

and output states, allowing the DACs to initialize to

specified configurations at power-up.

Precision on-chip output buffers swing rail-to-rail, and

provide 8µs settling time. The I

C-compatible, 2-wire

serial interface allows for a maximum clock frequency

of 400kHz.

The MAX5115 has independent high and low reference

inputs allowing maximum output voltage range flexibili-

ty. The MAX5116 has single high and low reference

inputs for all DACs to minimize trace count and save

board space. The reference rails accept voltage inputs

that range from ground to the positive supply rail.

The devices operate from a single +2.7V to +5.25V sup-

ply and consume 200µA per DAC. A software-controlled

power-down mode decreases supply current to less

than 25µA. A software-controlled mute mode sets each

DAC, or both DACs simultaneously, to their respective

REFL_ voltages. The MAX5116 also includes an asyn-

chronous MUTE input, that drives all DAC outputs simul-

taneously to their respective REFL_ voltages.

The MAX5115 is available in a 20-pin QSOP, and the

MAX5116 is available in a 16-pin QSOP package. Both

devices are specified for operation over the extended

(-40°C to +85°C) temperature range.

Applications

Digital Gain and Offset Adjustments

Programmable Attenuators

Portable Instruments

Power-Amp Bias Control

ATE Calibration

Laser Biasing

Features

♦ Nonvolatile Registers Initialize DACs to Stored

States

♦ +2.7V to +5.25V Single-Supply Operation

♦ Quad 8-Bit DACs with Independent High and Low

Reference Inputs

♦ Rail-to-Rail Output Buffers

♦ Low 200µA per DAC Supply Current

♦ Power-Down Mode Reduces Supply Current to

25µA (max)

♦ 400kHz, I

C-Compatible, 2-Wire Serial Interface

♦ Asynchronous MUTE Input (MAX5116)

♦ Small 16-/20-Pin QSOP Packages

MAX5115/MAX5116

Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial

Interface

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3586; Rev 0; 2/05

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.

EVALUATION KIT

AVAILABLE

PART

TEMP RANGE

PIN-

PACKAGE

REFERENCE

INPUTS

MAX5115EEP

-40°C to +85°C

20 QSOP

MAX5116EEE

-40°C to +85°C

16 QSOP

Pin Configuration and Typical Operating Circuit appear at

end of data sheet.

DAC0

NONVOLATILE/

VOLATILE

REGISTERS

DAC1

NONVOLATILE/

VOLATILE

REGISTERS

OUT0

OUT1

SCL

GND REFL

REFH

SDA

2-WIRE

SERIAL

INTERFACE/

CONTROL

MUTE

MAX5116

DAC2

NONVOLATILE/

VOLATILE

REGISTERS

DAC3

NONVOLATILE/

VOLATILE

REGISTERS

OUT2

OUT3

DAC0

DAC1

DAC2

DAC3

Simplified Diagram

Summary of content (19 pages)

PAGE 1
KIT ATION EVALU E L B A IL AVA 19-3586; Rev 0; 2/05 Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface The MAX5115/MAX5116 quad, 8-bit, digital-to-analog converters (DACs) feature nonvolatile registers. These nonvolatile registers store the DAC operating modes and output states, allowing the DACs to initialize to specified configurations at power-up. Precision on-chip output buffers swing rail-to-rail, and provide 8µs settling time.
PAGE 2
MAX5115/MAX5116 Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) VDD, A0, A1, A2, A3, SCL, SDA, MUTE.................-0.3V to +6.0V OUT0, OUT1, OUT2, OUT3, REFH0, REFH1, REFH2, REFH3, REFH, REFL0, REFL1, REFL2, REFL3, REFL .......................................................-0.3V to (VDD + 0.3V) Maximum Current into Any Pin .........................................
PAGE 3
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface (VDD = +2.7V to +5.25V, GND = 0, REFH_ = VDD, REFL_ = GND, RLOAD = 5kΩ, CL = 100pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +3.0V and TA = +25°C.) (Note 1) PARAMETER Input Low Voltage (Note 4) SYMBOL VIL CONDITIONS MIN TYP 2.7V ≤ VDD < 3.6V 3.6V ≤ VDD ≤ 5.25V Input Hysteresis IIN Input Capacitance CIN UNITS 0.3 x VDD V 1.1 0.
PAGE 4
MAX5115/MAX5116 Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface ELECTRICAL CHARACTERISTICS (continued) (VDD = +2.7V to +5.25V, GND = 0, REFH_ = VDD, REFL_ = GND, RLOAD = 5kΩ, CL = 100pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +3.0V and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 400 kHz DIGITAL TIMING (Figure 4, Note 8) SCL Clock Frequency fSCL Setup Time for START Condition tSU:STA 0.
PAGE 5
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface INTEGRAL NONLINEARITY vs. INPUT CODE 0.5 0 -0.5 1.50 1.25 1.00 0.75 0.50 1.75 0 64 128 0.75 0.50 2.5 3.0 3.5 4.0 4.5 5.0 -40 5.5 -15 10 35 60 SUPPLY VOLTAGE (V) TEMPERATURE (°C) DIFFERENTIAL NONLINEARITY vs. INPUT CODE DIFFERENTIAL NONLINEARITY vs. SUPPLY VOLTAGE DIFFERENTIAL NONLINEARITY vs. TEMPERATURE 0.25 0 -0.25 -0.50 -0.75 -1.00 64 128 -0.75 -1.00 -1.25 -1.50 256 192 -0.50 MAX5115/5116 toc06 -0.9 -1.0 -1.
PAGE 6
Typical Operating Characteristics (continued) (VDD = +3V, VREFH_ = +3V, VREFL_ = GND, RL = 5kΩ, CL = 100pF, TA = +25°C, unless otherwise noted.) OFFSET OUTPUT VOLTAGE vs. OUTPUT SINK CURRENT -0.12 -0.14 -0.16 -0.18 0.35 0.30 VDD = VREFH_ = 5V 0.25 0.20 VDD = VREFH_ = 3V -0.20 5.0 0.15 -15 10 35 60 85 VDD = VREFH_ = 5V 4.0 3.5 VDD = VREFH_ = 3V 3.0 2.5 2.0 0 2 4 6 8 10 0 3 6 9 12 TEMPERATURE (°C) OUTPUT SINK CURRENT (mA) OUTPUT SOURCE CURRENT (mA) SUPPLY CURRENT vs.
PAGE 7
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface 650 TA = -40°C 625 600 575 VDD = 5V CODE = FFh TA = +85°C 550 600 550 VDD = 5V CODE = 00h 500 VDD = 3V CODE = 00h VDD = 3V CODE = FFh 450 525 -40 -50 REFERENCE FEEDTHROUGH (dB) 650 NO LOAD MAX5115/5116 toc17 NO LOAD CODE = 00h SUPPLY CURRENT (μA) SUPPLY CURRENT (μA) 700 MAX5115/5116 toc16 700 675 REFERENCE FEEDTHROUGH vs. FREQUENCY (MAX5115) SUPPLY CURRENT vs.
PAGE 8
Typical Operating Characteristics (continued) (VDD = +3V, VREFH_ = +3V, VREFL_ = GND, RL = 5kΩ, CL = 100pF, TA = +25°C, unless otherwise noted.
PAGE 9
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface MAX5115/MAX5116 VDD 18 16 REFH0 15 REFL0 MAX5115 DAC0 NONVOLATILE REGISTER DAC0 VOLATILE REGISTER DAC0 14 OUT0 4 REFH1 5 REFL1 SCL 17 SDA 19 A3 20 A2 1 DAC1 NONVOLATILE REGISTER DAC1 VOLATILE REGISTER DAC1 6 OUT1 2-WIRE SERIAL INTERFACE/ CONTROL A1 2 A0 3 7 REFH2 8 REFL2 DAC2 NONVOLATILE REGISTER DAC2 VOLATILE REGISTER DAC2 9 OUT2 13 REFH3 12 REFL3 DAC3 NONVOLATILE REGISTER DAC3 VOLATILE REGISTER DAC3 11 OUT3 POR 10 GND Figure
PAGE 10
MAX5115/MAX5116 Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface VDD REFH 15 13 MAX5116 SCL 14 SDA 16 A3 1 A2 2 DAC0 NONVOLATILE REGISTER DAC0 VOLATILE REGISTER DAC0 DAC1 NONVOLATILE REGISTER DAC1 VOLATILE REGISTER DAC1 DAC2 NONVOLATILE REGISTER DAC2 VOLATILE REGISTER DAC2 DAC3 NONVOLATILE REGISTER DAC3 VOLATILE REGISTER DAC3 11 OUT0 6 OUT1 2-WIRE SERIAL INTERFACE/ CONTROL A1 3 A0 4 MUTE 9 7 OUT2 10 OUT3 POR 8 GND 12 REFL Figure 2.
PAGE 11
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface DAC Operation The MAX5115/MAX5116 use a DAC matrix decoding architecture that saves power. A resistor string divides the difference between the external reference voltages, VREFH_ and VREFL_. Row and column decoders select the appropriate tap from the resistor string, providing the equivalent analog voltage. The resistor string presents a code-independent input impedance to the reference and guarantees a monotonic output.
PAGE 12
MAX5115/MAX5116 Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface tR tF SDA tSU:DAT tHD:DAT tLOW tBUF tHD:STA tSU:STA tSU:STO SCL tHD:STA tHIGH tR tF S Sr ACK P S PARAMETERS ARE MEASURED FROM 30% TO 70%. Figure 4. 2-Wire Serial-Interface Timing Diagram Serial Interface The MAX5115/MAX5116 feature an I2C-compatible, 2wire serial interface consisting of a bidirectional serial data line (SDA) and a serial clock line (SCL).
PAGE 13
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface Successful data transfers are acknowledged with an acknowledge bit (ACK) or a not-acknowledge bit (NACK). Both the master and the MAX5115/MAX5116 (slave) generate acknowledge bits. To generate an acknowledge, the receiving device must pull SDA low before the rising edge of the acknowledge-related clock pulse (ninth pulse) and keep it low during the high period of the clock pulse (Figure 7).
PAGE 14
MAX5115/MAX5116 Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface MSB S LSB 0 A3 0 1 A2 A1 R/W =0 A0 ACK MSB C7 C6 C5 C4 C3 C2 C1 LSB C0 1 0 NV V R3 R2 R1 R0 ACK ADDRESS AND COMMAND BYTES GENERATED BY MASTER DEVICE MSB LSB 0 R/W =1 Sr A3 0 1 A2 A1 A0 MSB ACK LSB D7 D6 D5 D4 D3 D2 D1 D0 NACK P NACK GENERATED BY MASTER DEVICE DATA BYTE GENERATED BY MAX5115/MAX5116 Figure 9.
PAGE 15
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface 0 0 Table 3. DAC Write Selection R3 R2 R1 R0 FUNCTION 0 0 0 0 DAC0 0 0 0 1 DAC1 Transfer data from NVREG_ to VREG_ 0 0 1 0 DAC2 0 0 1 1 DAC3 1 1 1 1 All DACs* NONVOLATILE VOLATILE (NV) (V) FUNCTION 0 1 Write to VREG_ 1 0 Write to NVREG_ 1 1 Write to NVREG and VREG_ MAX5115/MAX5116 Table 2. Volatile and Nonvolatile Write Selection *This option is only valid for a write to all volatile registers.
PAGE 16
MAX5115/MAX5116 Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface Table 5. Volatile and Nonvolatile Read Selection NONVOLATILE (NV) VOLATILE (V) 0 1 Read from VREG_ 1 0 Read from NVREG_ Table 6. DAC Read Selection FUNCTION R3 R2 R1 R0 FUNCTION 0 0 0 0 DAC0 0 0 0 1 DAC1 0 0 1 0 DAC2 0 0 1 1 DAC3 Table 7.
PAGE 17
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface DAC Linearity and Offset Voltage The output buffer can have a negative input offset voltage that would normally drive the output negative, but with no negative supply, the output remains at GND (Figure 10). Determine linearity using the end-point method, measuring between code 10 (0A hex) and code 240 (F0 hex) after calibrating the offset and gain error (Figure 10). Table 9.
PAGE 18
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface MAX5115/MAX5116 Typical Operating Circuit Pin Configurations VDD μC SDA TOP VIEW VDD SCL RP RP RS* VDD SCL A2 1 20 A3 A1 2 19 SDA A0 3 18 VDD REFH1 4 17 SCL RS* SDA REFL1 5 MAX5115 REFH0 OUT0 REFH1 OUT1 REFH2 OUT2 REFH3 REFL0 REFL1 REFL2 REFL3 A1 A0 MAX5115 16 REFH0 OUT1 6 15 REFL0 REFH2 7 14 OUT0 OUT3 REFL2 8 13 REFH3 A3 A2 OUT2 9 12 REFL3 GND 10 11 OUT3 QSOP ADDRESS 0101 110 RS* VDD SCL RS* SDA *OPTIO
PAGE 19
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface QSOP.EPS PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH 21-0055 F 1 1 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.