MAX5175/MAX5177 19-1477 Rev 0 4/99 Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output General Description Features The MAX5175/MAX5177 low-power, serial, voltage-out- 1 LSB INL put, 12-bit digital-to-analog converters (DACs) feature a 1A Shutdown Current precision output amplifier in a space-saving 16-pin Glitch Free Output Voltage at Power-Up QSOP package. The MAX5175 operates from a single +5V supply, and the MAX5177 operates from a single Single-Supply Operation +3V supply. The output amplifiers inverting input is +5V (MAX5175) available to allow specific gain configurations, remote +3V (MAX5177) sensing, and high output current capability. This makes Full-Scale Output Range the MAX5175/MAX5177 ideal for a wide range of appli- +2.048V (MAX5177, V = +1.25V) cations, including industrial process control. Both REF devices draw only 260A of supply current, which +4.096V (MAX5175, V = +2.5V) REF reduces to 1A in shutdown mode. In addition, the pro- Rail-to-Rail Output Amplifier grammable power-up reset feature allows for a user- Adjustable Output Offset selectable output voltage state of either 0 or midscale. Low THD (-80dB) in Multiplying Operation The 3-wire serial interface is compatible with SPI, QSPI, and MICROWIRE standards. An input register SPI/QSPI/MICROWIRE-Compatible 3-Wire followed by a DAC register provides a double-buffered Serial Interface input, allowing the registers to be updated independent- Programmable Shutdown Mode and Power-Up ly or simultaneously with a 16-bit serial word. Additional Reset (0 or midscale) features include software and hardware shutdown, shut- down lockout, a hardware reset pin, and a reference Buffered Output Capable of Driving 420mA or input capable of accepting DC and offset AC signals. 5k 100pF Loads These devices provide a programmable digital output User-Programmable Digital Output Pin Allows pin for added functionality and a serial-data output pin Serial Control of External Components for daisy-chaining. All logic inputs are TTL/CMOS com- patible and are internally buffered with Schmitt triggers 14-Bit Upgrades Available (MAX5171/MAX5173) to allow direct interfacing to optocouplers. The MAX5175/MAX5177 incorporate a proprietary on-chip Ordering Information circuit that keeps the output voltage virtually glitch free, INL limiting the glitches to a few millivolts during power-up. PART TEMP. RANGE PIN-PACKAGE (LSB) Both devices come in 16-pin QSOP packages and are MAX5175AEEE -40C to +85C 16 QSOP 1 specified for the extended (-40C to +85C) temperature range. The MAX5171/MAX5173 are 14-bit pin-compatible MAX5175BEEE -40C to +85C 16 QSOP 2 upgrades to the MAX5175/MAX5177. For pin-compatible MAX5177AEEE -40C to +85C 16 QSOP 2 DACs with an internal reference, see the 13-bit MAX5177BEEE -40C to +85C 16 QSOP 4 MAX5132/MAX5133 and 12-bit MAX5122/MAX5123. Pin Configuration Applications Digitally Programmable 420mA Current Loops TOP VIEW FB 1 16 V Industrial Process Controls DD OUT 2 15 N.C. Digital Offset and Gain Adjustment RS 3 14 REF Motion Control Automatic Test Equipment (ATE) PDL 4 MAX5175 13 AGND MAX5177 Remote Industrial Controls CLR 5 12 SHDN P-Controlled Systems CS 6 11 UPO DIN 7 10 DOUT Functional Diagram appears at end of data sheet. SCLK 8 9 DGND SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. QSOP Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. Maxim Integrated Products 1 For free samples & the latest literature: Low-Power, Serial, 12-Bit DACs with Force/Sense Voltage Output ABSOLUTE MAXIMUM RATINGS V to AGND, DGND...............................................-0.3V to +6V Continuous Power Dissipation (T = +70C) DD A AGND to DGND.....................................................-0.3V to +0.3V 16-Pin QSOP (derate 8mW/C above +70C)...............667mW Digital Inputs to DGND.............................................-0.3V to +6V Operating Temperature Range.............................-40C to +85C DOUT, UPO to DGND ................................-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C DD FB, OUT REF to AGND...............................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10sec) .............................+300C DD Maximum Current into Any Pin............................................50mA 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 CHARACTERISTICSMAX5175 (V = +5V 10%, V = 2.5V, AGND = DGND, FB = OUT, R = 5k, C = 100pF referenced to ground, T = T to T , unless DD REF L L A MIN MAX otherwise noted. Typical values are at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS STATIC PERFORMANCE Resolution 12 Bits MAX5175A 1 Integral Nonlinearity (Note 1) INL LSB MAX5175B 2 Differential Nonlinearity DNL 1 LSB Offset Error (Note 2) V 10 mV OS R = L -0.6 4 LSB Gain Error GE LSB R = 5k -1.6 8 L Power-Supply Rejection Ratio PSRR 10 120 V/V Output Noise Voltage f = 100kHz 1 LSBp-p Output Thermal Noise Density 50 nV/Hz REFERENCE INPUT Reference Input Range V 0V - 1.4 V REF DD Reference Input Resistance R 18 k REF MULTIPLYING-MODE PERFORMANCE Reference -3dB Bandwidth V = 0.5Vp-p + 2.5V , slew-rate limited 350 kHz REF DC V = 3.6Vp-p + 1.8V , f = 1kHz, REF DC Reference Feedthrough -84 dB code = all 0s Signal-to-Noise Plus Distortion V = 1.4Vp-p + 2.5V , f = 10kHz, REF DC SINAD 84 dB Ratio code = FFF hex DIGITAL INPUTS Input High Voltage V 3 V IH Input Low Voltage V 0.8 V IL Input Hysteresis V 200 mV HYS Input Leakage Current I V = 0 or V 0.001 1 A IN IN DD Input Capacitance C 8 pF IN DIGITAL OUTPUTS Output High Voltage V I = 2mA V - 0.5 V OH SOURCE DD Output Low Voltage V I = 2mA 0.13 0.4 V OL SINK 2 MAX5175/MAX5177