MAX1184 19-2174 Rev 1 7/06 Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Parallel Outputs General Description Features Single 3V Operation The MAX1184 is a 3V, dual 10-bit analog-to-digital con- verter (ADC) featuring fully-differential wideband track- Excellent Dynamic Performance: and-hold (T/H) inputs, driving two pipelined, 9-stage 59.5dB SNR at f = 7.5MHz IN ADCs. The MAX1184 is optimized for low-power, high- 74dB SFDR at f = 7.5MHz IN dynamic performance applications in imaging, instru- Low Power: mentation, and digital communication applications. This 35mA (Normal Operation) 2.8mA (Sleep Mode) ADC operates from a single 2.7V to 3.6V supply, con- 1A (Shutdown Mode) suming only 105mW while delivering a typical signal-to- noise ratio (SNR) of 59.5dB at an input frequency of 0.02dB Gain and 0.25 Phase Matching (typ) 7.5MHz and a sampling rate of 20Msps. The T/H driven Wide 1V Differential Analog Input P-P input stages incorporate 400MHz (-3dB) input amplifiers. Voltage Range The converters may also be operated with single-ended 400MHz -3dB Input Bandwidth inputs. In addition to low operating power, the MAX1184 On-Chip 2.048V Precision Bandgap Reference features a 2.8mA sleep mode as well as a 1A power- User-Selectable Output FormatTwos down mode to conserve power during idle periods. Complement or Offset Binary An internal 2.048V precision bandgap reference sets 48-Pin TQFP Package with Exposed Paddle for the full-scale range of the ADC. A flexible reference Improved Thermal Dissipation structure allows the use of the internal or an externally Evaluation Kit Available derived reference, if desired for applications requiring increased accuracy or a different input voltage range. Ordering Information The MAX1184 features parallel, CMOS-compatible PART TEMP RANGE PIN-PACKAGE three-state outputs. The digital output format is set to MAX1184ECM -40C to +85C 48 TQFP-EP* twos complement or straight offset binary through a sin- gle control pin. The device provides for a separate out- MAX1184ECM+ -40C to +85C 48 TQFP-EP* put power supply of 1.7V to 3.6V for flexible interfacing. *EP = Exposed paddle. The MAX1184 is available in a 7mm x 7mm, 48-pin +Denotes lead-free package. TQFP package, and is specified for the extended industrial (-40C to +85C) temperature range. Pin Configuration Pin-compatible higher speed versions of the MAX1184 are also available. See Table 2 at end of data sheet for a list of pin-compatible versions. Refer to the MAX1180 data sheet for 105Msps, the MAX1181 data sheet for 80Msps, the MAX1182 data sheet for 65Msps, and the MAX1183 data sheet for 40Msps. In addition to these COM 1 36 D1A V 2 35 D0A speed grades, this family includes a 20Msps multi- DD GND 3 34 OGND plexed output version (MAX1185), for which digital data INA+ 4 33 OV DD is presented time-interleaved on a single, parallel 10-bit INA- 5 32 OV DD output port. V OGND 6 31 DD MAX1184 Applications GND 7 30 D0B INB- 8 29 D1B High-Resolution Imaging INB+ 9 28 D2B I/Q Channel Digitization GND 10 27 D3B EP V 11 26 D4B DD Multchannel IF Undersampling CLK 12 25 D5B Instrumentation Video Application 48 TQFP-EP NOTE: THE PIN 1 INDICATOR FOR LEAD-FREE PACKAGE IS REPLACED BY A + SIGN. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. GND 13 REFN 48 V 14 47 REFP DD V 15 46 REFIN DD GND 16 REFOUT 45 T/B 17 D9A 44 SLEEP 18 43 D8A PD 19 42 D7A OE 20 D6A 41 D9B 21 D5A 40 D8B 22 39 D4A D7B 23 D3A 38 D6B 24 D2A 37Dual 10-Bit, 20Msps, 3V, Low-Power ADC with Internal Reference and Parallel Outputs ABSOLUTE MAXIMUM RATINGS V , OVDD to GND...............................................-0.3V to +3.6V Continuous Power Dissipation (T = +70C) DD A OGND to GND.......................................................-0.3V to +0.3V 48-Pin TQFP-EP (derate 30.4mW/C above INA+, INA-, INB+, INB- to GND ...............................-0.3V to V +70C).......................................................................2430mW DD REFIN, REFOUT, REFP, REFN, CLK, Operating Temperature Range ...........................-40C to +85C COM to GND ..........................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C DD OE, PD, SLEEP, T/B, D9AD0A, Storage Temperature Range .............................-60C to +150C D9BD0B to OGND .............................-0.3V to (OV + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DD 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 = 3V, OV = 2.5V, 0.1F and 1.0F capacitors from REFP, REFN, and COM to GND REFOUT connected to REFIN through a DD DD 10k resistor, V = 2V (differential with respect to COM), C = 10pF at digital outputs (Note 1), f = 20MHz, T = T to T , IN P-P L CLK A MIN MAX unless otherwise noted. Typical values are at T = +25C.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution 10 Bits Integral Nonlinearity INL f = 7.5MHz 0.5 1.5 LSB IN Differential Nonlinearity DNL f = 7.5MHz, no missing codes guaranteed 0.25 1.0 LSB IN Offset Error < 1 1.8 % FS Gain Error 0 2 % FS ANALOG INPUT Differential Input Voltage V Differential or single-ended inputs 1.0 V DIFF Range Common-Mode Input Voltage V /2 DD V V CM Range 0.5 Input Resistance R Switched capacitor load 100 k IN Input Capacitance C 5pF IN CONVERSION RATE Maximum Clock Frequency f 20 MHz CLK Clock Data Latency 5 Cycles DYNAMIC CHARACTERISTICS f = 7.5MHz, T = +25C 57.3 59.5 INA or B A Signal-to-Noise Ratio SNR dB (Note 3) f = 12MHz 59.4 INA or B f = 7.5MHz, T = +25C 57 59.4 Signal-to-Noise and Distortion INA or B A SINAD dB (Note 3) f = 12MHz 59.2 INA or B f = 7.5MHz, T = +25C 64 74 Spurious-Free Dynamic Range INA or B A SFDR dBc (Note 3) f = 12MHz 72 INA or B 2 MAX1184