Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) SSOP 28

General Description

The MAX5322 dual, 12-bit, serial-interface, digital-to-ana-

log converter (DAC) provides bipolar ±5V to ±10V out-

puts from ±12V to ±15V analog power-supply voltages, or

unipolar 5V to 10V outputs from a single 12V to 15V ana-

log power-supply voltage.

The MAX5322 features excellent linearity with both inte-

gral nonlinearity (INL) and differential nonlinearity (DNL)

guaranteed to ±1 LSB (max). The device also features a

fast 10µs to 0.5 LSB settling time, and a hardware-shut-

down feature that reduces current consumption to 2.8µA.

The output goes to midscale at power-up in bipolar

mode (0V), and to zero scale at power-up in unipolar

mode (0V). A clear input (CLR) asynchronously clears

the DAC register and sets the outputs to 0V. The outputs

can be asynchronously updated with the load DAC

(LDAC) input.

The device features a fast 10MHz SPI™-/QSPI™-

/MICROWIRE™-compatible serial interface that operates

with 3V or 5V logic. Additional features include a serial-

data output (DOUT) for daisy chaining and read-back

functions. The MAX5322 requires external reference volt-

ages of 2V to 5.25V and is available in a 28-pin SSOP

package that operates over the extended (-40°C to

+85°C) temperature range.

Applications

Features

♦ Unipolar or Bipolar Output-Voltage Ranges

Unipolar: 0 to +2 x V

REF

(Single or Dual Supply)

Bipolar: -2 x V

REF

to +2 x V

REF

(Dual Supply)

♦ Guaranteed INL ≤ ±1 LSB (max)

♦ Guaranteed Monotonic: DNL ≤ ±1 LSB (max)

♦ 10µs Settling Time to 0.5 LSB

♦ Low 2.8µA Shutdown Current

♦ Fast 10MHz SPI-/QSPI-/MICROWIRE-Compatible

Serial Interface

♦ Power-On Reset Sets DAC Output to 0V

♦ Schmitt Trigger Inputs for Direct

Optocoupler Interface

♦ Serial-Data Output Allows Daisy-Chaining

of Devices

♦ 28-Pin SSOP (8mm x 10mm)

MAX5322

±10V, Dual, 12-Bit, Serial, Voltage-Output DAC

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3150; Rev 2; 10/05

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.

PART TEMP RANGE PIN-PACKAGE

MAX5322EAI -40°C to +85°C 28 SSOP

OUTA

SGNDA

REFA

12-BIT

DAC A

SW1

SW2

SW3

OUTB

SGNDB

12-BIT

DAC B

SW4

SW5

SW6

REFB

2R 2R

INPUT

REGISTERS

DAC

REGISTERS

DIN

SCLK

SERIAL INTERFACE

AND CONTROL

16-BIT SHIFT REGISTER

UNI/BIPB

UNI/BIPA

SHDN

DOUT

DIGITAL

POWER

DGND

ANALOG

POWER

AGND

MAX5322

CLR

LDAC

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Motor Control

Industrial Process

Controls

Industrial Automation

Automatic Test

Equipment (ATE)

Analog I/O Boards

Data-Acquisition Systems

Functional Diagram

Summary of content (18 pages)

PAGE 1
9-3150; Rev 2; 10/05 ±10V, Dual, 12-Bit, Serial, Voltage-Output DAC Features The MAX5322 dual, 12-bit, serial-interface, digital-to-analog converter (DAC) provides bipolar ±5V to ±10V outputs from ±12V to ±15V analog power-supply voltages, or unipolar 5V to 10V outputs from a single 12V to 15V analog power-supply voltage. The MAX5322 features excellent linearity with both integral nonlinearity (INL) and differential nonlinearity (DNL) guaranteed to ±1 LSB (max). The device also features a fast 10µs to 0.
PAGE 2
MAX5322 ±10V, Dual, 12-Bit, Serial, Voltage-Output DAC ABSOLUTE MAXIMUM RATINGS VDD to AGND..........................................................-0.3V to +17V VSS to AGND ..........................................................-17V to +0.3V VDD to VSS ..........................................................................+34V VCC to DGND ...........................................................-0.3V to +6V AGND to DGND.....................................................-0.3V to +0.
PAGE 3
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC (VDD = +15V ±5%, VSS = -15V ±5%, VCC = +5V ±10%, AGND = DGND = SGND_ = 0V, VREF_ = 5V, RLOAD = 2kΩ, CLOAD = 250pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DIGITAL INPUTS (SCLK, DIN, CS, SHDN, UNI/BIPA, UNI/BIPB, CLR, LDAC) Input Voltage High VIH Input Voltage Low VIL Input Capacitance C Input Current (Note 1) +2.7V ≤ VCC ≤ +3.6V +4.5V ≤ VCC ≤ +5.5V 0.
PAGE 4
MAX5322 ±10V, Dual, 12-Bit, Serial, Voltage-Output DAC ELECTRICAL CHARACTERISTICS (SINGLE SUPPLY) (VDD = +15V ±5%, VSS = 0V, VCC = +5V ±10%, AGND = DGND = SGND_ = 0V, VREF_ = 5V, RLOAD = 10kΩ, CLOAD = 250pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 5
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC (VDD = +15V ±5%, VSS = 0V, VCC = +5V ±10%, AGND = DGND = SGND_ = 0V, VREF_ = 5V, RLOAD = 10kΩ, CLOAD = 250pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN Tri-State Capacitance TYP MAX UNITS 10 pF 2.5 V/µs 10 µs DYNAMIC PERFORMANCE Voltage Output Slew Rate Output Settling Time To ±0.
PAGE 6
MAX5322 ±10V, Dual, 12-Bit, Serial, Voltage-Output DAC TIMING CHARACTERISTICS (VDD = +15V, VSS = -15V or 0V, VCC = +2.7V to +5.5V, AGND = DGND = SGND_ = 0, VREF_ = 5V, RLOAD = 2kΩ, ,CLOAD = 250pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 7
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC 0.4 0.3 0.4 0.3 0.2 0.1 0.1 0.1 -0.1 DNL (LSB) 0.2 INL (LSB) 0.2 0 0 -0.1 0 -0.1 -0.2 -0.2 -0.2 -0.3 -0.3 -0.3 -0.4 -0.4 -0.4 -0.5 -0.5 -0.5 1024 2048 4096 3072 2.0 2.5 INPUT CODE (DECIMAL) 3.0 3.5 4.0 4.5 5.0 DIFFERENTIAL NONLINEARITY vs. REFERENCE VOLTAGE 1024 0.3 4096 3072 BIPOLAR DNL vs. TEMPERATURE 0.5 MAX5322 toc04 0.4 2048 INPUT CODE (DECIMAL) BIPOLAR INL vs. TEMPERATURE 0.5 WORST CASE 0.4 0.
PAGE 8
Typical Operating Characteristics (continued) (VDD = +15V, VSS = -15V for bipolar graphs, VSS = 0 for unipolar graphs, VCC = +5V, AGND = DGND = SGND_ = 0, VREF_ = +5.0V, output unloaded, TA = +25°C, all graphs apply to both unipolar and bipolar, unless otherwise noted.) 2.5 MAX5322 toc11 50 CS 5V/div BIPOLAR ZERO-SCALE VOLTAGE vs. TEMPERATURE UNIPOLAR ZERO-SCALE VOLTAGE vs. TEMPERATURE MAX5322 toc10 CODE = 0X014hex 49 VOUT (mV) VOUT (mV) VOUT 100mV/div 46 CODE = 0X800hex 2.
PAGE 9
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC 4.0 -1.0 -1.5 3.0 3.0 -2.0 2.5 ISS (mA) 3.5 2.5 -2.5 2.0 2.0 -3.0 1.5 1.5 -3.5 1.0 1.0 -4.0 0.5 0.5 -4.5 0 0 -5.0 -15 10 35 60 85 -40 -15 10 35 60 85 -40 -15 10 35 60 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) BIPOLAR SHUTDOWN CURRENT vs. TEMPERATURE UNIPOLAR SHUTDOWN CURRENT vs. TEMPERATURE UNIPOLAR OUTPUT VOLTAGE vs. OUTPUT CURRENT IDD 2 1 0 ISS CODE = FFFhex 10.000 9.995 3 9.990 IDD 2 1 9.985 9.
PAGE 10
Typical Operating Characteristics (continued) (VDD = +15V, VSS = -15V for bipolar graphs, VSS = 0 for unipolar graphs, VCC = +5V, AGND = DGND = SGND_ = 0, VREF_ = +5.0V, output unloaded, TA = +25°C, all graphs apply to both unipolar and bipolar, unless otherwise noted.) BIPOLAR REFERENCE INPUT RESISTANCE vs.
PAGE 11
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC UNIPOLAR RELEASE FROM HARDWARE SHUTDOWN RESPONSE BIPOLAR RELEASE FROM HARDWARE SHUTDOWN RESPONSE MAX5322 toc30 UNIPOLAR SOFTWARE-SHUTDOWN RESPONSE MAX5322 toc31 VOUT MAX5322 toc32A 5V/div CS VOUT 5V/div 5V/div VSHDN VSHDN 5V/div VOUT 2V/div 2V/div t = 100µs/div t = 100µs/div BIPOLAR SOFTWARE-SHUTDOWN RESPONSE t = 40.0µs/div DAC-TO-DAC CROSSTALK MAX5322 toc33 MAX5322 toc32B 5V/div 1mV/div CS OUTB 0V 5V/div 10V/div VOUT OUTA t = 40.
PAGE 12
MAX5322 ±10V, Dual, 12-Bit, Serial, Voltage-Output DAC Pin Description PIN NAME 1, 2, 13–16, 27, 28 N.C. 3 UNI/BIPB 4 SHDN Active-Low Shutdown Input. Pulling SHDN low forces the DAC buffers into high impedance. Drive SHDN high for normal operation. 5 LDAC Active-Low Load DAC Input. DAC A and DAC B are updated with information in the input register on the LDAC falling edge. 6 CLR Active-Low Asynchronous Clear DAC Input.
PAGE 13
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC The MAX5322 dual, 12-bit DAC operates from either single or dual analog supplies. Dual ±12V to ±15V power supplies provide bipolar ±5V to ±10V outputs, or unipolar 0V to 10V outputs. Single 12V to 15V analog power supplies only provide unipolar 0 to 10V outputs. The reference inputs accept voltages from 2V to 5.25V.
PAGE 14
MAX5322 ±10V, Dual, 12-Bit, Serial, Voltage-Output DAC DAC Architecture and isolate the shift register from the DAC registers. The DAC registers control the DAC ladder and thus the output voltage. Any update to a DAC register updates the respective output voltage. Data in the shift register is transferred to the input registers during the appropriate software command only.
PAGE 15
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC LSBUNI = This configuration channels the DAC output through two output stages to generate the ±2 x VREF output swing. The first amplifier generates the ±VREF voltage range and the second amplifier gains it up by two. When configured for bipolar operation, the MAX5322 must be driven with dual ±12V to ±15V power supplies. With UNI/BIPA (UNI/BIPB) forced high, switches SW1 (SW4) and SW2 (SW5) are open and SW3 (SW6) is closed.
PAGE 16
(max), DOUT is high impedance, and OUTA and OUTB are pulled to SGNDA and SGNDB, respectively, through the internal feedback resistors of the output amplifier (Figure 1). When coming out of shutdown, or during device power-up, allow 350µs for the output to stabilize. Applications Information Power Supplies A single supply of +12V to +15V is required to realize an output swing of 0 to 10V.
PAGE 17
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC MAX5322 SCLK CS CS CS CS TO OTHER SERIAL DEVICES MAX5322 MAX5322 SCLK DIN MAX5322 SCLK DOUT DIN DIN SCLK DOUT DIN DOUT Figure 7. Daisy-Chaining Devices Pin Configuration Chip Information TRANSISTOR COUNT: 5914 PROCESS: BiCMOS TOP VIEW N.C. 1 28 N.C. N.C. 2 27 N.C.
PAGE 18
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 2 SSOP.EPS MAX5322 ±10V, Dual, 12-Bit, Serial, Voltage-Output DAC 1 INCHES E H MILLIMETERS DIM MIN MAX MIN MAX A 0.068 0.078 1.73 1.99 A1 0.002 0.008 0.05 0.21 B 0.010 0.015 0.25 0.38 C 0.20 0.09 0.004 0.008 SEE VARIATIONS D E e 0.205 0.212 0.0256 BSC 5.