MAX1192 19-2835 Rev 2 7/09 Ultra-Low-Power, 22Msps, Dual 8-Bit ADC General Description Features The MAX1192 is an ultra-low-power, dual, 8-bit, 22Msps Ultra-Low Power analog-to-digital converter (ADC). The device features 27.3mW (Normal Operation: 22Msps) two fully differential wideband track-and-hold (T/H) inputs. 1.8W (Shutdown Mode) These inputs have a 440MHz bandwidth and accept fully Excellent Dynamic Performance differential or single-ended signals. The MAX1192 deliv- 48.6dB/47.2dB SNR at f = 5.5MHz/125MHz IN ers a typical signal-to-noise and distortion (SINAD) of 70dBc/69dBc SFDR at f = 5.5MHz/125MHz 48.6dB at an input frequency of 5.5MHz and a sampling IN rate of 22Msps while consuming only 27.3mW. This ADC 2.7V to 3.6V Single Analog Supply operates from a 2.7V to 3.6V analog power supply. A sep- 1.8V to 3.6V TTL/CMOS-Compatible Digital arate 1.8V to 3.6V supply powers the digital output driver. Outputs In addition to ultra-low operating power, the MAX1192 features three power-down modes to conserve power Fully Differential or Single-Ended Analog Inputs during idle periods. Excellent dynamic performance, Internal/External Reference Option ultra-low power, and small size make the MAX1192 ideal Multiplexed CMOS-Compatible Tri-State Outputs for applications in imaging, instrumentation, and digital communications. 28-Pin Thin QFN Package An internal 1.024V precision bandgap reference sets Evaluation Kit Available (Order MAX1193EVKIT) the full-scale range of the ADC to 0.512V. A flexible reference structure allows the MAX1192 to use its inter- nal reference or accept an externally applied reference Ordering Information for applications requiring increased accuracy. PART TEMP RANGE PIN-PACKAGE The MAX1192 features parallel, multiplexed, CMOS- MAX1192ETI-T -40C to +85C 28 Thin QFN-EP* compatible tri-state outputs. The digital output format is offset binary. A separate digital power input accepts a -Denotes a package containing lead(Pb). voltage from 1.8V to 3.6V for flexible interfacing to dif- *EP = Exposed paddle. ferent logic levels. The MAX1192 is available in a 5mm T = Tape and reel. 5mm, 28-pin thin QFN package, and is specified for the extended industrial (-40C to +85C) temperature range. Pin Configuration For higher sampling frequency applications, refer to the TOP VIEW MAX1195MAX1198 dual 8-bit ADCs. Pin-compatible versions of the MAX1192 are also available. Refer to the MAX1191 data sheet for 7.5Msps, and the MAX1193 data sheet for 45Msps. Applications PD1 22 14 D6 D7 Ultrasound and Medical Imaging PD0 23 13 IQ Baseband Sampling REFIN 24 12 OV DD Battery-Powered Portable Instruments COM 25 11 OGND MAX1192 Low-Power Video REFN 26 10 GND WLAN, Mobile DSL, WLL Receiver REFP 27 9 V DD EXPOSED PADDLE V 28 8 V DD DD 5mm x 5mm THIN QFN Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. 1 21 INA- D0 INA+ 2 20 D1 19 3 D2 GND 4 18 D3 CLK 5 17 A/B GND 6 16 D4 INB+ D5 INB- 7 15Ultra-Low-Power, 22Msps, Dual 8-Bit ADC ABSOLUTE MAXIMUM RATINGS V , OV to GND ...............................................-0.3V to +3.6V Operating Temperature Range ...........................-40C to +85C DD DD OGND to GND.......................................................-0.3V to +0.3V Junction Temperature......................................................+150C INA+, INA-, INB+, INB- to GND .................-0.3V to (V + 0.3V) Storage Temperature Range ............................-65C to +150C DD CLK, REFIN, REFP, REFN, COM to GND...-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DD PD0, PD1 to OGND .................................-0.3V to (OV + 0.3V) DD Digital Outputs to OGND.........................-0.3V to (OV + 0.3V) DD Continuous Power Dissipation (T = +70C) A 28-Pin Thin QFN (derated 20.8mW/C above +70C) ..1667mW 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 (V = 3.0V, OV = 1.8V, V = V (internal reference), C 10pF at digital outputs, f = 22MHz, C = C = C = DD DD REFIN DD L CLK REFP REFN COM 0.33F, T = -40C to +85C, unless otherwise noted. Typical values are at T = +25C.) (Note 1) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution 8 Bits Integral Nonlinearity INL 0.15 1.00 LSB Differential Nonlinearity DNL No missing codes over temperature 0.14 1.00 LSB +25C 4 Offset Error %FS < +25C 6 Gain Error Excludes REFP - REFN error 2 %FS DC Gain Matching 0.01 0.2 dB Gain Temperature Coefficient 30 ppm/C Offset (V 5%) 0.02 DD Power-Supply Rejection LSB Gain (V 5%) 0.05 DD ANALOG INPUT Differential Input Voltage Range V Differential or single-ended inputs 0.512 V DIFF Common-Mode Input Voltage V V / 2 V COM DD Range Input Resistance R Switched capacitor load 245 k IN Input Capacitance C 5pF IN CONVERSION RATE Clock Frequency Range f 7.5 22 MHz CLK Channel A 5.0 Clock Data Latency cycles Channel B 5.5 DYNAMIC CHARACTERISTICS (differential inputs, 4096-point FFT) f = 1.875MHz 48.6 IN Signal-to-Noise Ratio SNR f = 5.5MHz 47 48.6 dB IN (Note 2) f = 11MHz 48.6 IN f = 1.875MHz 48.7 IN Signal-to-Noise and Distortion SINAD f = 5.5MHz 47 48.6 dB IN (Note 2) f = 11MHz 48.6 IN 2 MAX1192