MAX1002 19-1270 Rev 0 7/97 Low-Power, 60Msps, Dual, 6-Bit ADC General Description Features The MAX1002 is a dual, 6-bit analog-to-digital converter 1/4LSB INL and DNL, Typical (ADC) that combines high-speed, low-power operation 1/4LSB (typ) Channel-to-Channel Offset Matching with a user-selectable input range, an internal refer- ence, and a clock oscillator. The dual, parallel ADCs 0.1dB Gain and 0.5 Phase Matching, Typical are designed to convert in-phase (I) and quadrature Internal Bandgap Voltage Reference (Q) analog signals into two 6-bit offset-binary-coded Two Matched 6-Bit, 60Msps ADCs digital outputs at sampling rates up to 60Msps while achieving typical integral nonlinearity (INL) and differ- Excellent Dynamic Performance: ential nonlinearity (DNL) of 1/4LSB. The ability to 5.85 ENOB with 20MHz Analog Input interface directly with baseband I and Q signals makes 5.7 ENOB with 50MHz Analog Input the MAX1002 ideal for use in direct-broadcast satellite, Internal Oscillator with Overdrive Capability VSAT, and QAM16 demodulation applications. 55MHz (-0.5dB) Bandwidth Input Amplifiers The MAX1002 input amplifiers feature true differential inputs, a 55MHz -0.5dB analog bandwidth, and user- with True Differential Inputs programmable input full-scale ranges of 125mVp-p, User-Selectable Input Full-Scale Range 250mVp-p, or 500mVp-p. With an AC-coupled input (125mVp-p, 250mVp-p, or 500mVp-p) signal, matching performance between input channels is typically 0.1dB gain, 1/4LSB offset, and 0.5 phase. Single-Ended or Differential Input Drive Dynamic performance is 5.85 effective number of bits +5V Single Supply (ENOB) with a 20MHz analog input signal, or 5.78 TTL Outputs ENOB with a 50MHz input signal. 90Msps Upgrade with +3.3V CMOS-Compatible The MAX1002 operates with a single +5V power supply and provides TTL-compatible digital outputs. The device Output Available (MAX1003) is available in the commercial temperature range (0C to +70C) and comes in a 36-pin SSOP package. Applications Ordering Information Direct Broadcast Satellite (DBS) Receivers PART TEMP. RANGE PIN-PACKAGE MAX1002CAX 0C to +70C 36 SSOP VSAT Receivers Wide Local Area Networks (WLAN) Pin Configuration appears at end of data sheet. Cable Television Set-Top Boxes Functional Diagram IOCC+ IOCC- IIN+ INPUT ADC 6 6 DATA D0ID5I AMP I BUFFER IIN- I VREF I OFFSET DCLK CLOCK CORREC- OUT TION I TNK+ GAIN BANDGAP CLOCK REFERENCE DRIVER TNK- OFFSET CORREC- MAX1002 TION Q QIN+ VREF INPUT 6 DATA 6 DQ0DQ5 ADC AMP BUFFER Q QIN- Q Q QOCC+ QOCC- Maxim Integrated Products 1 For free samples & the latest literature: Low-Power, 60Msps, Dual, 6-Bit ADC ABSOLUTE MAXIMUM RATINGS V to GND .........................................................-0.3V to +6.5V Continuous Power Dissipation (T = +70C) CC A V to OGND.........................................................-0.3V, +6.5V SSOP (derate 45mW/C above +70C) ......................941mW CCO GND to OGND .........................................................-0.3V, +0.3V Operating Temperature Range...............................0C to +70C Digital and Clock Output Pins to OGND ........-0.3V, V (<10sec) Storage Temperature Range .............................-65C to +150C CCO All Other Pins to GND..................................................-0.3V, V Lead Temperature (soldering, <10sec)...........................+300C CC 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. DC ELECTRICAL CHARACTERISTICS (V , V = +5V 5% T = T to T unless otherwise noted.) CC CCO A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC ACCURACY (Note 1) Resolution RES 6 Bits Integral Nonlinearity INL -0.5 0.25 0.5 LSB Differential Nonlinearity DNL No missing codes over temperature -0.5 0.25 0.5 LSB V GAIN = V (high gain) 118.75 125 131.25 FSH CC Full-Scale Input Range V GAIN = open (mid gain) 237.5 250 262.5 mVp-p FSM V GAIN = GND (low gain) 475 500 525 FSL INVERTING AND NONINVERTING ANALOG INPUTS Input Open-Circuit Voltage V 2.25 2.35 2.45 V AOC Input Resistance R 13 20 29 k IN Input Capacitance C Guaranteed by design 3 5 pF IN Other analog input driven with external source Common-Mode Voltage Range V 1.75 2.75 V CM (Note 2) OSCILLATOR INPUTS Oscillator Input Resistance R Other oscillator input tied to V + 0.3V 4.8 8 12.1 k OSC CC DIGITAL OUTPUTS (DI0DI5, DQ0DQ5) Digital Outputs Logic-High V I = 50A 2.4 V OH SOURCE Voltage Digital Outputs Logic-Low V I = 400A 0.5 V OL SINK Voltage POWER SUPPLY Supply Current I 63 104 mA CC Power-Supply Rejection Ratio PSRR V = 4.75V to 5.25V (Note 3) -75 -40 dB CC 20MHz, FS I & Q analog inputs, Digital Outputs Supply Current I 24 mA CCO C = 15pF (Note 4) LOAD Power Dissipation PD 380 mW 2 MAX1002