MAX1003

19-1236; Rev 0; 6/97 KIT ATION EVALU BLE AVAILA Low-Power, 90Msps, Dual 6-Bit ADC ____________________________Features o Two Matched 6-Bit ADCs o High Sampling Rate: 90Msps per ADC o Low Power Dissipation: 350mW o Excellent Dynamic Performance: 5.85 ENOB with 20MHz Analog Input 5.7 ENOB with 50MHz Analog Input o ±1/4LSB INL and DNL (typ) o Internal Bandgap Voltage Reference o Internal Oscillator with Overdrive Capability o 55MHz (-0.5dB) Bandwidth Input Amplifiers with True Differential Inputs o User-Selectable Input Full-Scale Range (125mVp-p, 250mVp-p, or 500mVp-p) o 1/4LSB Channel-to-Channel Offset Matching (typ) o 0.1dB Gain and 0.5° Phase Matching (typ) o Single-Ended or Differential Input Drive o Flexible, 3.3V, CMOS-Compatible Digital Outputs _______________General Description The MAX1003 is a dual, 6-bit analog-to-digital converter (ADC) that combines high-speed, low-power operation with a user-selectable input range, an internal reference, and a clock oscillator. The dual parallel ADCs are designed to convert in-phase (I) and quadrature (Q) analog signals into two 6-bit, offset-binary-coded digital outputs at sampling rates up to 90Msps. The ability to directly interface with baseband I and Q signals makes the MAX1003 ideal for use in direct-broadcast satellite, VSAT, and QAM16 demodulation applications. The MAX1003 input amplifiers feature true differential inputs, a -0.5dB analog bandwidth of 55MHz, and userprogrammable input full-scale ranges of 125mVp-p, 250mVp-p, or 500mVp-p. With an AC-coupled input signal, matching performance between input channels is typically better than 0.1dB gain, 1/4LSB offset, and 0.5° phase. Dynamic performance is 5.85 effective number of bits (ENOB) with a 20MHz analog input signal, or 5.7 ENOB with a 50MHz signal. The MAX1003 operates with +5V analog and +3.3V digital supplies for easy interfacing to +3.3V-logic-compatible digital signal processors and microprocessors. It comes in a 36-pin SSOP package. MAX1003 ________________________Applications Direct Broadcast Satellite (DBS) Receivers VSAT Receivers Wide Local Area Networks (WLANs) Cable Television Set-Top Boxes ______________Ordering Information PART MAX1003CAX TEMP. RANGE 0°C to +70°C PIN-PACKAGE 36 SSOP Pin Configuration appears at end of data sheet. _________________________________________________________Functional Diagram IOCC+ IIN+ INPUT AMP I OFFSET CORRECTION I IOCC6 6 IIN- ADC I VREF DATA BUFFER I DI0–DI5 CLOCK OUT BANDGAP REFERENCE CLOCK DRIVER DCLK TNK+ TNK- GAIN OFFSET CORRECTION Q QIN+ INPUT AMP Q QOCC+ MAX1003 VREF ADC Q 6 DATA BUFFER Q 6 DQ0–DQ5 QIN- QOCC- ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 Low-Power, 90Msps, Dual 6-Bit ADC MAX1003 ABSOLUTE MAXIMUM RATINGS VCC to GND ............................................................-0.3V to 6.5V VCCO to OGND ........................................................-0.3V to 6.5V GND to OGND ........................................................-0.3V to 0.3V Digital and Clock Output Pins to OGND...-0.3V to VCCO (10sec) All Other Pins to GND...............................................-0.3V to VCC Continuous Power Dissipation (TA = +70°C) SSOP (derate 11.8mW/°C above +70°C) ...................941mW Operating Temperature Range...............................0°C to +70°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering,