MAX1196 19-2600 Rev 0 9/02 Dual 8-Bit, 40Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs General Description Features The MAX1196 is a 3V, dual 8-bit analog-to-digital con- Single 2.7V to 3.6V Operation verter (ADC) featuring fully differential wideband track- Excellent Dynamic Performance and-hold (T/H) inputs, driving two ADCs. The MAX1196 48.4dB/44.7dB SINAD at f = 20MHz/200MHz IN is optimized for low power, small size, and high-dynamic 68.9dB/53dBc SFDR at f = 20MHz/200MHz IN performance for applications in imaging, instrumenta- tion, and digital communications. This ADC operates -72dB Interchannel Crosstalk at f = 20MHz IN from a single 2.7V to 3.6V supply, consuming only Low Power 87mW while delivering a typical signal-to-noise and dis- 87mW (Normal Operation) tortion (SINAD) of 48.4dB at an input frequency of 9mW (Sleep Mode) 20MHz and a sampling rate of 40Msps. The T/H driven input stages incorporate 400MHz (-3dB) input ampli- 0.3W (Shutdown Mode) fiers. The converters can also be operated with single- 0.05dB Gain and 0.05 Phase Matching ended inputs. In addition to low operating power, the Wide 1V Differential Analog Input Voltage MAX1196 features a 3mA sleep mode as well as a P-P 0.1A power-down mode to conserve power during idle Range periods. 400MHz -3dB Input Bandwidth An internal 2.048V precision bandgap reference sets On-Chip 2.048V Precision Bandgap Reference the full-scale range of the ADC. A flexible reference structure allows the use of this internal or an externally User-Selectable Output FormatTwos applied reference, if desired for applications requiring Complement or Offset Binary increased accuracy or a different input voltage range. Pin-Compatible 8-Bit and 10-Bit Upgrades The MAX1196 features parallel, multiplexed, CMOS- Available compatible three-state outputs. The digital output format Ordering Information can be set to twos complement or straight offset binary through a single control pin. The device provides for a PART TEMP RANGE PIN-PACKAGE separate output power supply of 1.7V to 3.6V for flexible MAX1196ECM -40C to +85C 48 TQFP-EP* interfacing. The MAX1196 is available in a 7mm 7mm, *EP = Exposed pad. 48-pin TQFP package, and is specified for the extended industrial (-40C to +85C) temperature range. Pin Configuration Pin-compatible, nonmultiplexed higher speed versions of the MAX1196 are also available. Refer to the MAX1198 data sheet for 100Msps, the MAX1197 data sheet for 60Msps, and the MAX1195 data sheet for 40Msps. For a 10-bit, pin-compatible upgrade, refer to the COM 1 36 N.C. MAX1186 data sheet. With the N.C. pins of the V 2 35 N.C. DD MAX1196 internally pulled down to ground, this ADC GND 3 34 OGND becomes a drop-in replacement for the MAX1186. INA+ 4 33 OV DD INA- 5 32 OV Applications DD V 6 31 OGND DD MAX1196 Baseband I/Q Sampling GND 7 30 A/B INB- N.C. 8 29 Multichannel IF Sampling INB+ 9 28 N.C. Ultrasound and Medical Imaging GND 10 27 N.C. V 11 26 N.C. DD Battery-Powered Instrumentation CLK 12 25 N.C. WLAN, WWAN, WLL, MMDS Modems Set-Top Boxes VSAT Terminals TQFP-EP Functional Diagram appears at end of data sheet. 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 48 REFN V 14 47 REFP DD V 15 46 REFIN DD GND 16 45 REFOUT T/B 17 44 D7A/B SLEEP 18 43 D6A/B PD 19 42 D5A/B OE 20 41 D4A/B N.C. 21 40 D3A/B N.C. 22 39 D2A/B N.C. 23 38 D1A/B N.C. 24 37 D0A/BDual 8-Bit, 40Msps, 3V, Low-Power ADC with Internal Reference and Multiplexed Parallel Outputs ABSOLUTE MAXIMUM RATINGS V , OV to GND .............................................. -0.3V to +3.6V Continuous Power Dissipation (T = +70C) DD DD A OGND to GND...................................................... -0.3V to +0.3V 48-Pin TQFP (derate 12.5mW/C above +70C)........1000mW INA+, INA-, INB+, INB- to GND ...............................-0.3V to V Operating Temperature Range ...........................-40C to +85C DD REFIN, REFOUT, REFP, REFN, COM, Junction Temperature......................................................+150C CLK to GND............................................-0.3V to (V + 0.3V) Storage Temperature Range .............................-60C to +150C DD OE, PD, SLEEP, T/B, Lead Temperature (soldering, 10s) .................................+300C D7A/BD0A/B, A/B to OGND...............-0.3V to (OV + 0.3V) 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 = OV = 3V, 0.1F and 2.2F capacitors from REFP, REFN, and COM to GND REFOUT connected to REFIN through a 10k DD DD resistor, V = 2V (differential with respect to COM), C = 10pF at digital outputs (Note 5), f = 40MHz, T = T to T , IN P-P L CLK A MIN MAX unless otherwise noted. +25C guaranteed by production test, <+25C guaranteed by design and characterization. Typical values are at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution 8 Bits Integral Nonlinearity INL f = 7.51MHz (Note 1) 0.3 1 LSB IN f = 7.51MHz, no missing codes IN Differential Nonlinearity DNL 0.15 1 LSB guaranteed (Note 1) Offset Error 4 %FS Gain Error 4 %FS Gain Temperature Coefficient 100 ppm/C ANALOG INPUT Differential Input Voltage Range V Differential or single-ended inputs 1.0 V DIFF Common-Mode Input Voltage V / 2 DD V V CM Range 0.2 Input Resistance R Switched capacitor load 140 k IN Input Capacitance C 5pF IN CONVERSION RATE Maximum Clock Frequency f 40 MHz CLK CHA 5 Clock Data Latency Cycles CHB 5.5 DYNAMIC CHARACTERISTICS (f = 40MHz) CLK f = 2MHz at -1dB FS 48.7 INA or B f = 7.5MHz at -1dB FS 48.7 INA or B Signal-to-Noise Ratio SNR dB f = 20MHz at -1dB FS 47.5 48.5 INA or B f = 101MHz at -1dB FS 48 INA or B f = 2MHz at -1dB FS 48.6 INA or B f = 7.5MHz at -1dB FS 48.7 INA or B Signal-to-Noise and Distortion SINAD dB f = 20MHz at -1dB FS 47 48.4 INA or B f = 101MHz at -1dB FS 48 INA or B 2 MAX1196