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General Description

The MAX5132/MAX5133 low-power, 13-bit, voltage-out-

put digital-to-analog converters (DACs) feature an inter-

nal precision bandgap reference and output amplifier.

The MAX5132 operates on a single +5V supply with an

internal reference of +2.5V and offers a configurable out-

put amplifier. If necessary, the user can override the on-

chip, <10ppm/°C voltage reference with an external

reference. The MAX5133 has the same features as the

MAX5132 but operates from a single +3V supply and

has an internal +1.25V precision reference. The user-

accessible inverting input and output of the amplifier

allows specific gain configurations, remote sensing, and

high output drive capability for a wide range of

force/sense applications. Both devices draw only 500µA

of supply current, which reduces to 3µA in power-down

mode. In addition, their power-up reset feature allows for

a user-selectable initial output state of either 0V or mid-

scale and reduces output glitches during power-up.

The serial interface is compatible with SPI™, QSPI™,

and MICROWIRE™, which makes the MAX5132/

MAX5133 suitable for cascading multiple devices. Each

DAC has a double-buffered input organized as an input

loads data into the input register. The DAC register may

be updated independently or simultaneously with the

input register.

Both devices are available in a 16-pin QSOP package

and are specified for the extended-industrial (-40°C to

+85°C) operating temperature range. For pin-compati-

ble 14-bit upgrades, see the MAX5171/MAX5173 data

sheet; for pin-compatible 12-bit versions, see the

MAX5122/MAX5123 data sheet.

Applications

Industrial Process Control

Automatic Test Equipment (ATE)

Digital Offset and Gain Adjustment

Motion Control

Microprocessor-Controlled Systems

Features

♦ Single-Supply Operation

+5V (MAX5132)

+3V (MAX5133)

♦ Built-In 10ppm/°C max Precision Bandgap Reference

+2.5V (MAX5132)

+1.25V (MAX5133)

♦ SPI/QSPI/MICROWIRE-Compatible, 3-Wire Serial

Interface

♦ Pin-Programmable Shutdown-Mode and Power-

Up Reset (0V or Midscale Output Voltage)

♦ Buffered Output Capable of Driving 5kΩ 100pF

or 4–20mA Loads

♦ Space-Saving 16-Pin QSOP Package

♦ Pin-Compatible Upgrades for the 12-Bit

MAX5122/MAX5123

♦ Pin-Compatible 14-Bit Upgrades Available

(MAX5171/MAX5173)

MAX5132/MAX5133

+5V/+3V, 13-Bit, Serial, Force/Sense DACs

with 10ppm/°C Internal Reference

________________________________________________________________

Maxim Integrated Products

FB V

REFADJ

REF

AGND

UPO

DOUT

DGND

TOP VIEW

MAX5132

MAX5133

QSOP

OUT

RSTVAL

PDL

CLR

DIN

SCLK

19-1441; Rev 0; 3/99

PART

MAX5132AEEE

MAX5132BEEE -40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-

PACKAGE

16 QSOP

Pin Configuration

Ordering Information

INL

(LSB)

±0.5

±1

MAX5133AEEE

MAX5133BEEE

±1

-40°C to +85°C

-40°C to +85°C 16 QSOP

16 QSOP ±2

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Summary of content (20 pages)

PAGE 1
9-1441; Rev 0; 3/99 +5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference The MAX5132/MAX5133 low-power, 13-bit, voltage-output digital-to-analog converters (DACs) feature an internal precision bandgap reference and output amplifier. The MAX5132 operates on a single +5V supply with an internal reference of +2.5V and offers a configurable output amplifier. If necessary, the user can override the onchip, <10ppm/°C voltage reference with an external reference.
PAGE 2
MAX5132/MAX5133 +5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference ABSOLUTE MAXIMUM RATINGS Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (TA = +70°C) 16-Pin QSOP (derate 8.00mW/°C above +70°C)..........667mW Operating Temperature Range ..........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................
PAGE 3
+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference (VDD = +5V ±10%, AGND = DGND, 33nF capacitor at REFADJ, internal reference, RL = 5kΩ, CL = 100pF, output amplifier connected in unity-gain, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC PERFORMANCE Voltage Output Slew Rate SR Output Settling Time To ±0.5LSB, VSTEP = 2.5V Output Voltage Swing (Note 4) 0.
PAGE 4
MAX5132/MAX5133 +5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference ELECTRICAL CHARACTERISTICS—MAX5133 (+3V) (continued) (VDD = +3V ±10%, AGND = DGND, 33nF capacitor at REFADJ, internal reference, RL = 5kΩ, CL = 100pF, output amplifier connected in unity-gain, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL Input Leakage Current IIN Input Capacitance CIN CONDITIONS VIN = 0 or VDD MIN TYP MAX UNITS -1 0.
PAGE 5
+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference (VDD = +3V ±10%, AGND = DGND, 33nF capacitor at REFADJ, internal reference, RL = 5kΩ, CL = 100pF, output amplifier connected in unity-gain, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 6
Typical Operating Characteristics (VDD = +5V, RL = 5kΩ, CL = 100pF, OS = AGND, TA = +25°C, output amplifier connected in unity-gain configuration, unless otherwise noted.) MAX5132 DIFFERENTIAL NONLINEARITY vs. DIGITAL INPUT CODE 0.10 DNL (LSB) 0.05 0.15 0 0.05 0 -0.05 -0.05 -0.10 -0.10 -0.15 -0.15 4,000 6,000 8,000 0 10,000 2,000 4,000 (CODE = 1555 HEX) 350 (CODE = 0000 HEX) 200 MAX5132/33 toc05 (CODE = 1555 HEX) 350 (CODE = 0000 HEX) 0 20 40 60 80 100 20 40 60 80 100 3.
PAGE 7
+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference MAX5132 DIGITAL FEEDTHROUGH (SCLK, OUT) MAX5132 DYNAMIC-RESPONSE FALL TIME MAX5132 MAJOR CARRY TRANSITION MAX5132/33-11 MAX5132/33-10 CS 5V/div OUT 1V/div CS 2V/div OUT 1mV/div AC-COUPLED OUT 100mV/div AC-COUPLED 5µs/div MAX5133 DIFFERENTIAL NONLINEARITY vs. DIGITAL INPUT CODE 0.05 DNL (LSB) 0.10 0.05 0 0 -0.05 -0.10 -0.05 -0.10 -0.15 -0.15 -0.20 -0.20 -0.
PAGE 8
Typical Operating Characteristics (continued) (VDD = +5V, RL = 5kΩ, CL = 100pF, OS = AGND, TA = +25°C, output amplifier connected in unity-gain configuration,unless otherwise noted.) MAX5133 FULL-SCALE OUTPUT VOLTAGE vs. TEMPERATURE MAX5133 FULL-SCALE OUTPUT ERROR vs. RESISTIVE LOAD 1.250 1.245 1.240 MAX5132/33-21 MAX5132/33 toc20 1.255 -1 CS 2V/div -2 OUT 400mV/div -3 -4 -60 -40 -20 0 20 40 60 80 100 0.
PAGE 9
+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference PIN NAME FUNCTION 1 FB 2 OUT Analog Output Voltage. High impedance if part is in shutdown. 3 RSTVAL Reset Value Input (Digital Input) 1: Connect to VDD to select midscale as the output reset value. 0: Connect to DGND to select 0V as the output reset value. 4 PDL Power-Down Lockout (Digital Input). 1: Normal operation. 0: Disallows shutdown (device cannot be powered down). 5 CLR Reset DAC Input (Digital Input).
PAGE 10
MAX5132/MAX5133 +5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference CS PDL PD VDD AGND DGND DIN SCLK SR CONTROL 16-BIT SHIFT REGISTER RSTVAL DOUT LOGIC OUTPUT UPO DECODE CONTROL CLR FB 13 MAX5132 MAX5133 BANDGAP 1.25V REFERENCE INPUT REGISTER 2X (X1) 4k DAC REGISTER OUT DAC 2.5V (1.25V) REFERENCE BUFFER REFADJ REF ( ) FOR MAX5133 ONLY. Figure 1.
PAGE 11
+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference External Reference An external reference may be applied to the REF pin. Disable the internal reference by pulling REFADJ to VDD. This allows an external reference signal (AC- or DC-based) to be fed into the REF pin. For proper operation, do not exceed the input voltage range limits of 0V to (VDD - 1.4V) for VREF.
PAGE 12
MAX5132/MAX5133 +5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference Table 1. Serial-Interface Programming Commands 16-BIT SERIAL WORD FUNCTION C2 C1 C0 D12 ............... D0 0 0 0 XXXXXXXXXXXXX No operation. 0 0 1 13-Bit DAC Data Load input register; DAC register unchanged. 0 1 0 13-Bit DAC Data Simultaneously load input and DAC registers; exit shutdown. 0 1 1 XXXXXXXXXXXXX Update DAC register from input register; exit shutdown.
PAGE 13
+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference the three control bits (C2, C1, C0) and the first five data bits (D12–D8). The second 8-bit data stream contains the remaining bits, D7–D0. Serial Data Output The contents of the internal shift-register are output serially on DOUT, which allows for daisy-chaining (see Applications Information) of multiple devices as well as data readback.
PAGE 14
MAX5132/MAX5133 +5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference Table 3. Detailed SSPCON Register Contents CONTROL BIT MAX5132/MAX5133 SETTINGS SYNCHRONOUS SERIAL-PORT CONTROL REGISTER (SSPCON) WCOL BIT7 X Write-Collision Detection Bit SSPOV BIT6 X Receive-Overflow Detection Bit SSPEN BIT5 1 Synchronous Serial Port Enable Bit 0: Disables serial port and configures these pins as I/O port pins.
PAGE 15
+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference Settling Time The settling time is the amount of time required from the start of a transition until the DAC output settles to its new output value within the converter’s specified accuracy. Digital Feedthrough Digital feedthrough is noise generated on the DAC’s output when any digital input transitions.
PAGE 16
MAX5132/MAX5133 +5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference where NB is the numeric value of the DAC’s binary input code, VREF is the voltage of the internal (or external) precision reference, and G is the overall gain. The application circuit in Figure 10 uses a low-cost op amp (MAX4162) external to the MAX5132/MAX5133. Together with the MAX5132/MAX5133, this circuit offers an overall gain of 2V/V. Table 6 lists example codes for bipolar output voltages.
PAGE 17
+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference MAX5132/MAX5133 Table 5. Unipolar Code Table (Gain = +2V/V) DAC CONTENTS ANALOG OUTPUT MSB INTERNAL REFERENCE LSB EXTERNAL REFERENCE MAX5132 MAX5133 MAX5132/MAX5133 1 1111 1111 1111 4.99939V 2.49969V VREF (8191 / 8192) 2 1 0000 0000 0001 2.50061V 1.25031V VREF (4097 / 8192) 2 1 0000 0000 0000 2.5V 1.25V VREF (4096 / 8192) 2 0 1111 1111 1111 2.49939V 1.24969V VREF (4095 / 8192) 2 0 0000 0000 0001 610.
PAGE 18
MAX5132/MAX5133 +5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference Using an External Reference with AC Components capacitor in parallel with a 0.1µF capacitor to AGND. Minimize lead lengths to reduce lead inductance. The MAX5132/MAX5133 have multiplying capabilities within the reference input voltage range specifications. Figure 13 shows a technique for applying a sinusoidal input to REF, where the AC signal is offset before being applied to the reference input.
PAGE 19
+5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference QSOP.
PAGE 20
MAX5132/MAX5133 +5V/+3V, 13-Bit, Serial, Force/Sense DACs with 10ppm/°C Internal Reference NOTES 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.