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19-1304; Rev 0; 10/97 Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs _______________General Description The MAX5152/MAX5153 low-power, serial, voltage-output, dual 13-bit digital-to-analog converters (DACs) consume only 500A from a single +5V (MAX5152) or +3V (MAX5153) supply. These devices feature Rail-toRail(R) output swing and are available in space-saving 16-pin QSOP and DIP packages. Access to the inverting input allows for specific gain configurations, remote sensing, and high output current capability, making these devices ideally suited for industrial process controls. These devices are also well suited for digitally programmable (4-20mA) current loops. The 3-wire serial interface is SPITM/QSPITM and MicrowireTM compatible. Each DAC has a doublebuffered input organized as an input register followed by a DAC register, which allows the input and DAC registers to be updated independently or simultaneously. Additional features include a programmable shutdown (2A), hardware-shutdown lockout, a separate voltage reference for each DAC, power-on reset, and an activelow clear input (CL) that resets all registers and DACs to zero. The MAX5152/MAX5153 provide a programmable logic output pin for added functionality, and a serial-data output pin for daisy chaining. ____________________________Features o 13-Bit Dual DAC with Configurable Output Amplifier o Single-Supply Operation: +5V (MAX5152) +3V (MAX5153) o Rail-to-Rail Output Swing o Low Quiescent Current: 500A (normal operation) 2A (shutdown mode) o Power-On Reset Clears DAC Outputs to Zero o SPI/QSPI and Microwire Compatible o Space-Saving 16-Pin QSOP Package o Pin-Compatible 12-Bit Versions: MAX5156/MAX5157 MAX5152/MAX5153 ______________Ordering Information PART MAX5152ACPE MAX5152BCPE MAX5152ACEE MAX5152BCEE MAX5152BC/D TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C PIN-PACKAGE 16 Plastic DIP 16 Plastic DIP 16 QSOP 16 QSOP Dice* INL (LSB) 1/2 1 1/2 1 1 ________________________Applications Industrial Process Control Digital Offset and Gain Adjustment Remote Industrial Controls Motion Control Digitally Programmable 4-20mA Current Loops Automatic Test Equipment Ordering Information continued at end of data sheet. *Dice are tested at TA = +25C, DC parameters only. Pin Configuration appears at end of data sheet. _________________________________________________________Functional Diagram DOUT CL PDL DGND AGND VDD REFA DECODE CONTROL 16-BIT SHIFT REGISTER LOGIC OUTPUT SR CONTROL INPUT REG A DAC REG A DAC A OUTA MAX5152 MAX5153 INPUT REG B DAC REG B DAC B FBA OUTB FBB CS DIN SCLK UPO REFB Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 ABSOLUTE MAXIMUM RATINGS VDD to AGND............................................................-0.3V to +6V VDD to DGND ...........................................................-0.3V to +6V AGND to DGND ..................................................................0.3V FBA, FBB to AGND.....................................-0.3V to (VDD + 0.3V) REF_, OUT_ to AGND.................................-0.3V to (VDD + 0.3V) Digital Inputs (SCLK, DIN, CS, CL, PDL) to DGND ................................................................-0.3V to +6V Digital Outputs (DOUT, UPO) to DGND .....-0.3V to (VDD + 0.3V) Maximum Current into Any Pin .........................................20mA Continuous Power Dissipation (TA = +70C) Plastic DIP (derate 10.5mW/C above +70C) .............593mW QSOP (derate 8.30mW/C above +70C) .....................667mW CERDIP (derate 10.00mW/C above +70C) ................800mW Operating Temperature Ranges MAX5152_C_E/MAX5153_C_E ...........................0C to +70C MAX5152_E_E/MAX5153_E_E..........................-40C to +85C MAX5152_MJE/MAX5153_MJE ......................-55C to +125C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS--MAX5152 (VDD = +5V 10%, VREFA = VREFB = 2.5V, RL = 10k, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C, output buffer connected in unity-gain configuration (Figure 9).) PARAMETER STATIC PERFORMANCE Resolution Integral Nonlinearity Differential Nonlinearity Offset Error Offset Tempco Gain Error Gain-Error Tempco VDD Power-Supply Rejection Ratio REFERENCE INPUT Reference Input Range Reference Input Resistance REF RREF Minimum with code 1555 hex Input code = 1FFF hex, VREF = 0.67Vp-p at 2.5VDC Input code = 0000 hex, VREF = (VDD - 1.4Vp-p) at 1kHz SINAD Input code = 1FFF hex, VREF = 1Vp-p at 2.5VDC, f = 25kHz CL, PDL, CS, DIN, SCLK CL, PDL, CS, DIN, SCLK 200 VIN = 0V to VDD 0.001 8 1 3.0 0.8 0 14 20 VDD 1.4 V k PSRR Normalized to 2.5V 4.5V VDD 5.5V N INL DNL VOS TCVOS (Note 1) Guaranteed monotonic Code = 20 Normalized to 2.5V 3 -0.5 3 20 200 6 MAX5152A MAX5152B 13 1/2 1 1 6 Bits LSB LSB mV ppm/C LSB ppm/C V/V SYMBOL CONDITIONS MIN TYP MAX UNITS MULTIPLYING-MODE PERFORMANCE Reference 3dB Bandwidth Reference Feedthrough Signal-to-Noise plus Distortion Ratio DIGITAL INPUTS Input High Voltage Input Low Voltage Input Hysteresis Input Leakage Current Input Capacitance 2 VIH VIL VHYS IIN CIN V V mV A pF 600 -85 82 kHz dB dB _______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs ELECTRICAL CHARACTERISTICS--MAX5152 (continued) (VDD = +5V 10%, VREFA = VREFB = 2.5V, RL = 10k, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C, output buffer connected in unity-gain configuration (Figure 9).) PARAMETER SYMBOL CONDITIONS MIN VDD 0.5 0.13 0.75 To 1/2LSB of full-scale, VSTEP = 2.5V Rail-to-rail (Note 2) IFB_ 20 0 to VDD 0 25 CS = VDD, fDIN = 100kHz, VSCLK = 5Vp-p 5 5 VDD IDD (Note 3) 4.5 0.5 2 5.5 0.65 10 1 0.1 0.40 TYP MAX UNITS DIGITAL OUTPUTS (DOUT, UPO) Output High Voltage Output Low Voltage DYNAMIC PERFORMANCE Voltage Output Slew Rate Output Settling Time Output Voltage Swing Current into FBA or FBB Time Required to Exit Shutdown Digital Feedthrough Digital Crosstalk POWER SUPPLIES Positive Supply Voltage Power-Supply Current Power-Supply Current in Shutdown Reference Current in Shutdown TIMING CHARACTERISTICS SCLK Clock Period SCLK Pulse Width High SCLK Pulse Width Low CS Fall to SCLK Rise Setup Time SCLK Rise to CS Rise Hold Time DIN Setup Time DIN Hold Time SCLK Rise to DOUT Valid Propagation Delay SCLK Fall to DOUT Valid Propagation Delay SCLK Rise to CS Fall Delay CS Rise to SCLK Rise Hold CS Pulse Width High tCP tCH tCL tCSS tCHS tDS tDH tDO1 tDO2 tCS0 tCS1 tCSW CLOAD = 200pF CLOAD = 200pF 10 40 100 (Note 4) 100 40 40 40 0 40 0 80 80 ns ns ns ns ns ns ns ns ns ns ns ns V mA A A SR V/s s V A s nV-s nV-s VOH VOL ISOURCE = 2mA ISINK = 2mA V V MAX5152/MAX5153 IDD(SHDN) (Note 3) Note 1: Accuracy is specified from code 20 to code 8191. Note 2: Accuracy is better than 1LSB for VOUT greater than 6mV and less than VDD - 50mV. Guaranteed by PSRR test at the end points. . Note 3: Digital inputs are set to either VDD or DGND, code = 0000 hex, RL = Note 4: SCLK minimum clock period includes rise and fall times. _______________________________________________________________________________________ 3 Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 ELECTRICAL CHARACTERISTICS--MAX5153 (VDD = +2.7V to +3.6V, VREFA = VREFB = 1.25V, RL = 10k, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C, output buffer connected in unity-gain configuration (Figure 9).) PARAMETER STATIC PERFORMANCE Resolution Integral Nonlinearity Differential Nonlinearity Offset Error Offset Tempco Gain Error Gain-Error Tempco VDD Power-Supply Rejection Ratio REFERENCE INPUT (VREF) Reference Input Range Reference Input Resistance REF RREF Minimum with code 1555 hex Input code = 1FFF hex, VREF(AC) = 0.67Vp-p at 1.25VDC Input code = 0000 hex, VREF = (VDD - 1.4V) at 1kHz SINAD Input code = 1FFF hex, VREF = 1Vp-p at 1.25VDC, f = 15kHz CL, PDL, CS, DIN, SCLK CL, PDL, CS, DIN, SCLK 200 VIN = 0V to VDD 0 8 ISOURCE = 2mA ISINK = 2mA VDD - 0.5 0.13 0.4 0.1 2.2 0.8 0 14 VDD 1.4 V k PSRR Normalized to 1.25V 2.7V VDD 3.6V N INL DNL VOS TCVOS (Note 5) Guaranteed monotonic Code = 40 Normalized to 1.25V 6 -0.5 6 20 320 8 MAX5153A MAX5153B 13 1 2 1 6 Bits LSB LSB mV ppm/C LSB ppm/C V/V SYMBOL CONDITIONS MIN TYP MAX UNITS MULTIPLYING-MODE PERFORMANCE Reference 3dB Bandwidth Reference Feedthrough Signal-to-Noise plus Distortion Ratio DIGITAL INPUTS Input High Voltage Input Low Voltage Input Hysteresis Input Leakage Current Input Capacitance Output High Voltage Output Low Voltage VIH VIL VHYS IIN CIN VOH VOL V V mV A pF V V 600 -92 73 kHz dB dB DIGITAL OUTPUTS (DOUT, UPO) 4 _______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs ELECTRICAL CHARACTERISTICS--MAX5153 (continued) (VDD = +2.7V to +3.6V, VREFA = VREFB = 1.25V, RL = 10k, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C, output buffer connected in unity-gain configuration (Figure 9).) PARAMETER DYNAMIC PERFORMANCE Voltage Output Slew Rate Output Settling Time Output Voltage Swing Current into FBA or FBB Time Required to Exit Shutdown Digital Feedthrough Digital Crosstalk POWER SUPPLIES Positive Supply Voltage Power-Supply Current Power-Supply Current in Shutdown Reference Current in Shutdown TIMING CHARACTERISTICS SCLK Clock Period SCLK Pulse Width High SCLK Pulse Width Low CS Fall to SCLK Rise Setup Time SCLK Rise to CS Rise Hold Time DIN Setup Time DIN Hold Time SCLK Rise to DOUT Valid Propagation Delay SCLK Fall to DOUT Valid Propagation Delay SCLK Rise to CS Fall Delay CS Rise to SCLK Rise Hold CS Pulse Width High tCP tCH tCL tCSS tCHS tDS tDH tDO1 tDO2 tCS0 tCS1 tCSW CLOAD = 200pF CLOAD = 200pF 10 40 100 (Note 4) 100 40 40 40 0 50 0 120 120 ns ns ns ns ns ns ns ns ns ns ns ns VDD IDD (Note 7) 2.7 0.5 1 3.6 0.6 8 1 V mA A A CS = VDD, fDIN = 100kHz, VSCLK = 3Vp-p IFB_ SR To 1/2LSB of full-scale, VSTEP = 1.25V Rail-to-rail (Note 6) 0.75 25 0 to VDD 0 25 5 5 0.1 V/s s V A s nV-s nV-s SYMBOL CONDITIONS MIN TYP MAX UNITS MAX5152/MAX5153 IDD(SHDN) (Note 7) Note 4: SCLK minimum clock period includes rise and fall times. Note 5: Accuracy is specified from code 40 to code 8191. Note 6: Accuracy is better than 1LSB for VOUT greater than 6mV and less than VDD - 100mV. Guaranteed by PSRR test at the end points. . Note 7: Digital inputs are set to either VDD or DGND, code = 0000 hex, RL = _______________________________________________________________________________________ 5 Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 __________________________________________Typical Operating Characteristics (VDD = +5V, RL = 10k, CL = 100pF, FB_ tied to OUT_, TA = +25C, unless otherwise noted.) MAX5152 REFERENCE VOLTAGE INPUT FREQUENCY RESPONSE MAX5152 TOC01 SUPPLY CURRENT vs. TEMPERATURE MAX5152 TOC02 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY VREF = 1Vp-p AT 2.5VDC CODE = 1FFF (HEX) MAX5152 TOC03 0 -2 -4 RELATIVE OUTPUT (dB) -6 -8 -10 -12 -14 -16 -18 -20 0 600 1200 1800 2400 VREF = 0.67Vp-p AT 2.5VDC CODE = 1FFF (HEX) 0.60 RL = CODE = 1FFF (HEX) SUPPLY CURRENT (mA) 0.55 -30 -40 THD + NOISE (dB) -50 -60 -70 -80 0.50 CODE = 0000 (HEX) 0.45 0.40 3000 -60 -20 20 60 100 140 FREQUENCY (kHz) TEMPERATURE (C) -90 0 10 FREQUENCY (kHz) 100 FULL-SCALE ERROR vs. LOAD MAX5152 TOC04 REFERENCE FEEDTHROUGH AT 1kHz -60 -70 RELATIVE OUTPUT (dB) -80 -90 -100 -110 -120 -130 -140 VREF = 3.6Vp-p AT 1.88VDC CODE = 0000 (HEX) MAX5152-TOC05 POWER-DOWN CURRENT vs. TEMPERATURE MAX5152 TOC06 0 VREF = 2.5V FULL-SCALE ERROR (LSB) -0.2 -50 3.0 2.5 2.0 1.5 1.0 0.5 0 -0.4 -0.6 -0.8 -1.0 0.1 1 10 LOAD (k) 100 1000 -150 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 FREQUENCY (kHz) POWER-DOWN CURRENT (A) -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C) OUTPUT FFT PLOT MAX5152-TOC07 DYNAMIC-RESPONSE RISE TIME MAX5152 TOC08 DYNAMIC-RESPONSE FALL TIME MAX5152 TOC09 0 -10 -20 RELATIVE OUTPUT (dB) -30 -40 -50 -60 -70 -80 -90 -100 VREF = 3.6Vp-p AT 1.8VDC f = 1kHz CODE = 1FFF (HEX) NOTE: RELATIVE TO FULL SCALE CS 5V/div AC COUPLED CS 5V/div AC COUPLED OUT_ 500mV/div OUT_ 500mV/div 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 FREQUENCY (kHz) 2s/div 2s/div 6 _______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs ____________________________Typical Operating Characteristics (continued) (VDD = +3V, RL = 10k, CL = 100pF, FB_ tied to OUT_, TA = +25C, unless otherwise noted.) MAX5152/MAX5153 MAX5153 REFERENCE VOLTAGE INPUT FREQUENCY RESPONSE MAX5152 TOC10 SUPPLY CURRENT vs. TEMPERATURE MAX5152 TOC11 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY VREF = 1Vp-p AT 1VDC CODE = 1FFF (HEX) MAX5152 TOC12 0 -2 -4 RELATIVE OUTPUT (dB) -6 -8 -10 -12 -14 -16 -18 -20 0 500 1000 1500 2000 VREF = 0.67Vp-p AT 1.25VDC CODE = 1FFF (HEX) 0.60 RL = SUPPLY CURRENT (mA) 0.55 -30 -40 THD + NOISE (dB) -50 -60 -70 -80 CODE = 1FFF (HEX) 0.50 0.45 CODE = 0000 (HEX) 2500 0.40 -60 -20 20 60 100 140 TEMPERATURE (C) -90 0 10 FREQUENCY (kHz) 100 FREQUENCY (kHz) FULL-SCALE ERROR vs. LOAD MAX5152 TOC13 REFERENCE FEEDTHROUGH AT 1kHz MAX5152-TOC14 POWER-DOWN CURRENT vs. TEMPERATURE MAX5251 TOC15 0 -0.2 FULL-SCALE ERROR (LSB) -0.4 -0.6 -0.8 -1.0 VREF = 1.25V -1.2 0.1 1 10 LOAD (k) 100 -50 -60 -70 RELATIVE OUTPUT (dB) -80 -90 -100 -110 -120 -130 -140 -150 VREF = 1.6Vp-p AT 0.88VDC CODE = 0000 (HEX) 3.0 2.5 2.0 1.5 1.0 0.5 0 1000 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 FREQUENCY (kHz) POWER-DOWN CURRENT (A) -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C) OUTPUT FFT PLOT -10 -20 RELATIVE OUTPUT (dB) -30 -40 -50 -60 -70 -80 -90 -100 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 FREQUENCY (kHz) VREF = 1.6Vp-p AT 0.88VDC f = 1kHz CODE = 1FFF (HEX) NOTE: RELATIVE TO FULL SCALE MAX5152-TOC16 0 DYNAMIC-RESPONSE RISE TIME MAX5152 TOC17 DYNAMIC-RESPONSE FALL TIME MAX5152 TOC18 CS 2V/div CS 2V/div OUT_ 500mV/div OUT_ 500mV/div 2s/div 2s/div _______________________________________________________________________________________ 7 Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 ____________________________Typical Operating Characteristics (continued) (VDD = +5V (MAX5152), VDD = +3V (MAX5153), RL = 10k, CL = 100pF, FB_ tied to OUT_, TA = TMIN to TMAX, unless otherwise noted.) MAX5152/MAX5153 MAX5152 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX5152 TOC19 MAX5153 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX5152 TOC19a 0.60 0.55 SUPPLY CURRENT (mA) 0.50 0.45 0.40 0.35 0.30 4.50 4.75 5.00 5.25 SUPPLY VOLTAGE (V) RL = CODE = 0000 (HEX) CODE = 1FFF (HEX) 0.55 CODE = 1FFF (HEX) 0.50 SUPPLY CURRENT (mA) 0.45 CODE = 0000 (HEX) 0.40 0.35 RL = 0.30 2.7 3.0 3.3 3.6 SUPPLY VOLTAGE (V) 5.50 MAX5152 MAJOR-CARRY TRANSITION MAX5152 TOC20 CS 2V/div OUT_ 10mV/div AC COUPLED 2s/div MAX5152 ANALOG CROSSTALK MAX5152 TOC21 MAX5152 DIGITAL FEEDTHROUGH MAX5152 TOC22 OUTA 1V/div SCLK 5V/div OUTA 500V/div AC COUPLED OUTB 200V/div AC COUPLED 200s/div 1s/div 8 _______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs ______________________________________________________________Pin Description PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NAME AGND OUTA FBA REFA CL CS DIN SCLK DGND DOUT UPO PDL REFB FBB OUTB VDD Analog Ground DAC A Output Voltage DAC A Output Amplifier Feedback Input. Inverting input of the output amplifier. Reference for DAC A Active-Low Clear Input. Resets all registers to zero. DAC outputs go to 0V. Chip-Select Input Serial Data Input Serial Clock Input Digital Ground Serial Data Output User-Programmable Output Power-Down Lockout. The device cannot be powered down when PDL is low. Reference Input for DAC B DAC B Output Amplifier Feedback Input. Inverting input of the output amplifier. DAC B Output Voltage Positive Power Supply FUNCTION MAX5152/MAX5153 _______________Detailed Description The MAX5152/MAX5153 dual, 13-bit, voltage-output DACs are easily configured with a 3-wire serial interface. These devices include a 16-bit data-in/data-out shift register, and each DAC has a double-buffered input comprised of an input register and a DAC register (see Functional Diagram). Both DACs use an inverted R-2R ladder network that produces a weighted voltage proportional to the input voltage value. Each DAC has its own reference input to facilitate independent fullscale values. Figure 1 depicts a simplified circuit diagram of one of the two DACs. FB_ R R R OUT_ 2R 2R D0 2R D10 2R D11 2R D12 REF_ AGND SHOWN FOR ALL 1s ON DAC Reference Inputs The reference inputs accept both AC and DC values with a voltage range extending from 0V to (VDD - 1.4V). Determine the output voltage using the following equation: VOUT = VREF x NB / 8192 where NB is the numeric value of the DAC's binary input code (0 to 8191) and VREF is the reference voltage. The reference input impedance ranges from 14k (1555 hex) to several giga ohms (with an input code of 0000 hex). This reference input capacitance is code dependent and typically ranges from 15pF with an input code of all zeros to 50pF with an input code of all ones. Figure 1. Simplified DAC Circuit Diagram Output Amplifier The output amplifier's inverting input is available to the user, allowing force and sense capability for remote sensing and specific gain configurations. The inverting input can be connected to the output to provide a unitygain buffered output. The output amplifiers have a typical slew rate of 0.75V/s and settle to 1/2LSB within 25s, with a load of 10k in parallel to 100pF. Loads less than 2k degrade performance. 9 _______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 Table 1. Serial-Interface Programming Commands 16-BIT SERIAL WORD A0 0 1 0 1 0 1 1 0 0 0 0 0 0 0 0 0 C1 0 0 1 1 1 0 1 0 0 0 0 0 0 0 0 0 C0 1 1 0 0 1 0 1 0 0 0 0 0 0 0 0 0 D12................D0 MSB LSB 13 bits of DAC data 13 bits of DAC data 13 bits of DAC data 13 bits of DAC data 13 bits of DAC data xxxxxxxxxxxxx xxxxxxxxxxxxx 0 0 1 x xxxxxxxxx 1 0 1 x xxxxxxxxx 1 1 0 x xxxxxxxxx 1 1 1 x xxxxxxxxx 0 1 0 x xxxxxxxxx 0 1 1 x xxxxxxxxx 1 0 0 1 xxxxxxxxx 1 0 0 0 xxxxxxxxx 0 0 0 x xxxxxxxxx FUNCTION Load input register A; DAC register is unchanged. Load input register B; DAC register is unchanged. Load input register A; all DAC registers are updated. Load input register B; all DAC registers are updated. Load all DAC registers from the shift register (start up both DACs with new data). Update both DAC registers from their respective input registers (start up both DACs with data previously stored in the input registers). Shut down both DACs if PDL = 1. Update DAC register A from input register A (start up DAC A with data previously stored in input register A). Update DAC register B from input register B (start up DAC B with data previously stored in input register B). Shut down DAC A when PDL = 1. Shut down DAC B when PDL = 1. UPO goes low (default). UPO goes high. Mode 1, DOUT clocked out on SCLK's rising edge. Mode 0, DOUT clocked out on SCLK's falling edge (default). No operation (NOP). "x" = don't care Note: When A0, C1, and C0 = "0", D12, D11, D10, and D9 become control bits. Power-Down Mode The MAX5152/MAX5153 feature a software-programmable shutdown mode that reduces the typical supply current to 2A. The two DACs can be shut down independently or simultaneously by using the appropriate programming word. For instance, enter shutdown mode (for both DACs) by writing an input control word of 111XXXXXXXXXXXXX (Table 1). In shutdown mode, the reference inputs and amplifier outputs become high impedance, and the serial interface remains active. Data in the input registers is saved, allowing the MAX5152/MAX5153 to recall the output state prior to entering shutdown when returning to normal mode. Exit shutdown by recalling the previous condition or by updating the DAC with new information. When returning to normal operation (exiting shutdown), wait 20s for output stabilization. 10 Serial Interface The MAX5152/MAX5153 3-wire serial interface is compatible with both Microwire (Figure 2) and SPI/QSPI (Figure 3) serial-interface standards. The 16-bit serial input word consists of an address bit, two control bits, and 13 bits of data (MSB to LSB) as shown in Figure 4. The address and control bits determines the response of the MAX5152/MAX5153, as outlined in Table 1. The MAX5152/MAX5153's digital inputs are double buffered, which allows any of the following: loading the input register(s) without updating the DAC register(s), updating the DAC register(s) from the input register(s), or updating the input and DAC registers concurrently. The address and control bits allow for the DACs to act independently. ______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs Send the 16-bit data as two 8-bit packets (SPI, Microwire) or one 16-bit word (QSPI), with CS low during this period. The address and control bits determine which register will be updated, as well as the state of the registers when exiting shutdown. The 3-bit address/control determines: MICROWIRE PORT MAX5152/MAX5153 SCLK SK MAX5152 MAX5153 DIN SO CS I/O Figure 2. Connections for Microwire VCC * registers to be updated * clock edge on which data is clocked out via the serial data output (DOUT) * state of the user-programmable logic output * configuration of the device after shutdown The general timing diagram in Figure 5 illustrates how data is acquired. Driving CS low enables the device to receive data. Otherwise, the interface control circuitry is disabled. With CS low, data at DIN is clocked into the register on the rising edge of SCLK. As CS goes high, data is latched into the input and/or DAC registers depending on the address and control bits. The maximum clock frequency guaranteed for proper operation is 10MHz. Figure 6 depicts a more detailed timing diagram of the serial interface. SS DIN MOSI SPI/QSPI PORT MAX5152 MAX5153 SCLK SCK Serial Data Output (DOUT) DOUT is the internal shift register's output. It allows for daisy-chaining and data readback. The MAX5152/ MAX5153 can be programmed to shift data out of DOUT on SCLK's falling edge (Mode 0) or rising edge (Mode 1). Mode 0 provides a lag of 16 clock cycles, which maintains compatibility with SPI/QSPI and Microwire interfaces. In Mode 1, the output data lags 15.5 clock cycles. On power-up, the device defaults to Mode 0. User-Programmable Logic Output (UPO) UPO allows an external device to be controlled through the MAX5152/MAX5153 serial interface (Table 1), thereby reducing the number of microcontroller I/O pins required. On power-up, UPO is low. Power-Down Lockout Input (PDL) PDL disables software shutdown when low. When in shutdown, transitioning PDL from high to low wakes up the part with the output set to the state prior to shutdown. PDL can also be used to asynchronously wake up the device. Daisy Chaining Devices Any number of MAX5152/MAX5153s can be daisy chained by connecting the DOUT pin of one device to the DIN pin of the following device in the chain (Figure 7). CS I/O CPOL = 0, CPHA = 0 Figure 3. Connections for SPI/QSPI MSB ..................................................................................LSB 16 Bits of Serial Data Address Bits A0 Control Bits C1, C0 MSB.......Data Bits.........LSB D12.................................D0 13 Data Bits 1 Address/2 Control Bits Figure 4. Serial-Data Format ______________________________________________________________________________________ 11 Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 CS COMMAND EXECUTED 1 DIN A0 C1 C0 D12 D11 D10 D9 8 D8 D7 9 D6 D5 D4 D3 D2 D1 16 D0 SCLK Figure 5. Serial-Interface Timing Diagram CS tCSO SCLK tDS DIN tDH tCSS tCL tCH tCP tCSH tCS1 tCSW Figure 6. Detailed Serial-Interface Timing Diagram SCLK SCLK SCLK MAX5152 MAX5153 DIN CS DOUT DIN CS MAX5152 MAX5153 DOUT DIN CS MAX5152 MAX5153 DOUT TO OTHER SERIAL DEVICES Figure 7. Daisy Chaining MAX5152/MAX5153s Since the MAX5152/MAX5153's DOUT has an internal active pull-up, the DOUT sink/source capability determines the time required to discharge/charge a capacitive load. Refer to the digital output V OH and V OL specifications in the Electrical Characteristics. Figure 8 shows an alternative method of connecting several MAX5152/MAX5153s. In this configuration, the data bus is common to all devices; data is not shifted through a daisy-chain. More I/O lines are required in this configuration because a dedicated chip-select input (CS) is required for each IC. 12 ______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 DIN SCLK CS1 CS2 CS3 TO OTHER SERIAL DEVICES CS CS CS MAX5152 MAX5153 SCLK DIN SCLK DIN MAX5152 MAX5153 SCLK DIN MAX5152 MAX5153 Figure 8. Multiple MAX5152/MAX5153s Sharing a Common DIN Line Table 2. Unipolar Code Table (Gain = +1) +5V/+3V REF_ VDD DAC CONTENTS MSB LSB 11111 1111 1111 ANALOG OUTPUT 8191 +VREF 8192 4097 +VREF 8192 4096 VREF +VREF = 2 8192 4095 +VREF 8192 1 +VREF 8192 MAX5152 MAX5153 DAC FB_ 10000 OUT_ 0000 0001 10000 AGND DGND 0000 0000 01111 1111 1111 Figure 9. Unipolar Output Circuit 00000 00000 0000 0000 0001 0000 0V __________Applications Information Unipolar Output Figure 9 depicts the MAX5152/MAX5153 configured for unity-gain, unipolar operation. Table 2 lists the unipolar output codes. To increase dynamic range, specific gain configurations can be used as shown in Figure 10. Bipolar Output The MAX5152/MAX5153 can be configured for a bipolar output, as shown in Figure 11. The output voltage is given by the equation: VOUT = VREF [((2 x NB) / 8192) - 1] where NB represents the numeric value of the DAC's binary input code. Table 3 shows digital codes and the corresponding output voltage for Figure 11's circuit. 13 ______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 REF_ +5V/+3V VDD REF_ +5V/+3V 10k 10k R2 FB_ R1 MAX5152 MAX5153 DAC VDD VOUT OUT_ MAX5152 MAX5153 DAC _ FB_ V+ VOUT OUT_ VDGND AGND DGND AGND VOUT = 1 + R1 R2 ( ) ( )( ) N VREF_ 8192 Figure 10. Configurable Output Gain Figure 11. Bipolar Output Circuit Table 3. Bipolar Code Table DAC CONTENTS MSB LSB 11111 1111 1111 ANALOG OUTPUT 4095 +VREF 4096 1 +VREF 4096 +5V/ +3V +5V/+3V 26k AC REFERENCE INPUT MAX495 10000 10000 01111 0000 0000 1111 0001 0000 1111 500mVp-p 10k REF_ VDD FB_ 0V 1 -VREF 4096 4095 -VREF 4096 4096 -VREF = - VREF 4096 DGND DAC_ OUT_ 00000 0000 0001 MAX5152 MAX5153 AGND 00000 0000 0000 Figure 12. AC Reference Input Circuit Using an AC Reference In applications where the reference has an AC signal component, the MAX5152/MAX5153 have multiplying capabilities within the reference input voltage range specifications. Figure 12 shows a technique for applying a sinusoidal input to the reference input to REF_, where the AC signal is offset before being applied to the reference input. 14 Harmonic Distortion and Noise The total harmonic distortion plus noise (THD+N) is typically less than -80dB at full scale with a 1Vp-p input swing at 5kHz. The typical -3dB frequency is 600kHz for both devices, as shown in the Typical Operating Characteristics. ______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs Digital Calibration and Threshold Selection Figure 13 shows the MAX5152/MAX5153 in a digital calibration application. With a bright value applied to the photodiode (on), the DAC is digitally ramped up until it trips the comparator. The microprocessor stores this high calibration value. Repeat the process with a dim light (off) to obtain the dark current calibration. The microprocessor then programs the DAC to set an output voltage that is the midpoint of the two calibration values. Applications include tachometers, motion sensing, automatic readers, and liquid clarity analysis. V+ REF_ +5V/+3V VDD PHOTODIODE MAX5152/MAX5153 MAX5152 MAX5153 FB_ V+ Digital Control of Gain and Offset The two DACs can be used to control the offset and gain for curve-fitting nonlinear functions, such as transducer linearization or analog compression/expansion applications. The input signal is used as the reference for the gain-adjust DAC, whose output is summed with the output from the offset-adjust DAC. The relative weight of each DAC output is adjusted by R1, R2, R3, and R4 (Figure 14). OUT_ P DIN DGND AGND DAC _ R V- VOUT Figure 13. Digital Calibration +5V/+3V VDD MAX5152 MAX5153 VIN CS DIN SCLK CL VREF CONTROL/ SHIFT REGISTER REFA DACA FBA R1 OUT_A R3 R4 FBB VOUT = GAIN - OFFSET R2 VOUT DACB REFB OUT_B DGND AGND [ ][ ] = (V NA )( R2 )(1+ R4 ) (V [ 8192 R1+R2 R3 ] [ IN REF NB 8192 )( R4 )] R3 NA IS THE NUMERIC VALUE OF THE INPUT CODE FOR DACA. NB IS THE NUMERIC VALUE OF THE INPUT CODE FOR DACB. Figure 14. Digital Control of Gain and Offset ______________________________________________________________________________________ 15 Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 Digital Programmable Current Source Figure 15 depicts a digitally programmable, unidirectional current source that can be used in industrial control applications. The output current is: IOUT = (VREF / R) (NB / 8192) where NB is the DAC code and R is the sense resistor. REF_ +5V/+3V VL VDD DAC_ OUT_ IOUT 2N3904 Power-Supply Considerations On power-up, the input and DAC registers clear (reset to zero code). For rated performance, VREF_ should be at least 1.4V below VDD. Bypass the power supply with a 4.7F capacitor in parallel with a 0.1F capacitor to GND. Minimize lead lengths to reduce lead inductance. MAX5152 MAX5153 DGND AGND FB_ Grounding and Layout Considerations Digital and AC transient signals on AGND can create noise at the output. Connect AGND to the highest quality ground available. Use proper grounding techniques, such as a multilayer board with an unbroken, lowinductance ground plane. Carefully lay out the traces between channels to reduce AC cross-coupling and crosstalk. Wire-wrapped boards and sockets are not recommended. If noise becomes an issue, shielding may be required. R Figure 15. Digitally Programmable Current Source 16 ______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs _Ordering Information (continued) PART MAX5152AEPE MAX5152BEPE MAX5152AEEE MAX5152BEEE MAX5152BMJE MAX5153ACPE MAX5153BCPE MAX5153ACEE MAX5153BCEE MAX5153BC/D MAX5153AEPE MAX5153BEPE MAX5153AEEE MAX5153BEEE MAX5153BMJE TEMP. RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 16 Plastic DIP 16 Plastic DIP 16 QSOP 16 QSOP 16 CERDIP** 16 Plastic DIP 16 Plastic DIP 16 QSOP 16 QSOP Dice* 16 Plastic DIP 16 Plastic DIP 16 QSOP 16 QSOP 16 CERDIP** INL (LSB) 1/2 1 1/2 1 1 1 2 1 2 2 1 2 1 2 2 DIP/QSOP __________________Pin Configuration TOP VIEW AGND 1 OUTA 2 FBA 3 REFA 4 CL 5 CS 6 DIN 7 SCLK 8 16 VDD 15 OUTB 14 FBB MAX5152/MAX5153 MAX5152 MAX5153 13 REFB 12 PDL 11 UPO 10 DOUT 9 DGND *Dice are tested at TA = +25C, DC parameters only. **Contact factory for availability. ___________________Chip Information TRANSISTOR COUNT: 3053 SUBSTRATE CONNECTED TO AGND ______________________________________________________________________________________ 17 Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 ________________________________________________________Package Information PDIPN.EPS 18 ______________________________________________________________________________________ Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs ___________________________________________Package Information (continued) QSOP.EPS MAX5152/MAX5153 ______________________________________________________________________________________ 19 Low-Power, Dual, 13-Bit Voltage-Output DACs with Configurable Outputs MAX5152/MAX5153 ___________________________________________Package Information (continued) CDIPS.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. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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