MAX120/MAX122 500ksps, 12-Bit ADCs with Track/Hold and Reference General Description Features The MAX120/MAX122 complete, BiCMOS, sampling 12-bit 12-Bit Resolution analog-to-digital converters (ADCs) combine an on-chip No Missing Codes Over Temperature track/hold (T/H) and a low-drift voltage reference with fast 20ppm/C -5V Internal Reference conversion speeds and low-power consumption. The T/Hs 1.6s Conversion Time/500ksps Throughput 350ns acquisition time combined with the MAX120s 1.6s (MAX120) conversion time results in throughput rates as high as 500k 2.6s Conversion Time/333ksps Throughput samples per second (ksps). Throughput rates of 333ksps (MAX122) are possible with the 2.6s conversion time of the MAX122. Low Noise and Distortion: The MAX120/MAX122 accept analog input voltages from 70dB (min) SINAD -5V to +5V. The only external components needed are -77dB (max) THD (MAX122) decoupling capacitors for the power-supply and refer- ence voltages. The MAX120 operates with clocks in the Low Power Dissipation: 210mW 0.1MHz to 8MHz frequency range. The MAX122 accepts Separate Track/Hold Control Input 0.1MHz to 5MHz clock frequencies. Continuous-Conversion Mode Available The MAX120/MAX122 employ a standard microprocessor 5V Input Range, Overvoltage Tolerant to 15V (P) interface. Three-state data outputs are configured 24-Pin Narrow DIP, Wide SO, and SSOP Packages to operate with 12-bit data buses. Data-access and bus- release timing specifications are compatible with most Ordering Information popular Ps without resorting to wait states. In addition, the MAX120/MAX122 can interface directly to a first-in, PIN- INL PART TEMP RANGE first-out (FIFO) buffer, virtually eliminating P interrupt PACKAGE (LSB) overhead. All logic inputs and outputs are TTL/CMOS MAX120CNG+ 0C to +70C 24 PDIP 1 compatible. For applications requiring a serial interface, MAX120CWG+ 0C to +70C 24 Wide SO 1 refer to the MAX121. MAX120CAG+ 0C to +70C 24 SSOP 1 Applications MAX120ENG+ -40C to +85C 24 PDIP 1 Digital-Signal Processing MAX120EWG+ -40C to +85C 24 Wide SO 1 Audio and Telecom Processing +Denotes a lead(Pb)-free/RoHS-compliant package. Speech Recognition and Synthesis High-Speed Data Acquisition Functional Diagram Spectrum Analysis Data Logging Systems Pin Configuration TOP VIEW + 1 MODE RD 24 MAX120 2 CS 23 VSS MAX122 3 VDD INT/BUSY 22 4 AIN CLKIN 21 5 V CONVST 20 REF 6 AGND D0 19 7 D11 D1 18 8 D10 D2 17 9 D9 D3 16 10 D8 D4 15 11 D7 D5 14 12 DGND D6 13 PDIP/SO/SSOP 19-0030 Rev 1 3/12MAX120/MAX122 500ksps, 12-Bit ADCs with Track/Hold and Reference Absolute Maximum Ratings V to DGND ..........................................................-0.3V to +6V Narrow CDIP (derate 12.50mW/C above +70C) ....1000mW DD V to DGND ........................................................+0.3V to -17V Operating Temperature Ranges SS AIN to AGND .......................................................................15V MAX12 C ...........................................................0C to +70C AGND to DGND .................................................................0.3V MAX12 E .................................................... -40C to +85C Digital Inputs/Outputs to DGND ....................-0.3V to (V + 0.3V) MAX12 MRG .............................................. -55C to +125C Continuous Power Dissipation (T = +70C) Storage Temperature Range ..............................-65C to+160C A Narrow PDIP (derate 13.33mW/C above +70C) ....1067mW Lead Temperature (soldering, 10s) .................................+300C SO (derate 11.76mW/C above +70C) ......................941mW Soldering Temperature (reflow) .......................................+260C SSOP (derate 8.00mW/C above +70C) ...................640mW 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 = +4.75V to +5.25V, V = -10.8V to -15.75V, f = 8MHz for MAX120 and 5MHz for MAX122, T = T to T , unless DD SS CLK A MIN MAX otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ACCURACY Resolution RES 12 Bits MAX122AC/AE 3/4 12-bit no missing codes over MAX120C/E, 1 temperature range MAX122BC/BE Differential Nonlinearity (Note 1) DNL LSB 11-bit no missing codes over MAX120M 2 temperature range MAX122AC/AE 3/4 Integral Nonlinearity INL LSB MAX120C/E, (Note 1) 1 MAX122BC/BE Code 00..00 to 00..01 transition, 3 LSB near V = 0V Bipolar Zero Error (Note 1) AIN Temperature drift 0.005 LSB/C Including reference adjusted for bipolar Full-Scale Error (Notes 1, 2) 8 LSB zero error T = +25C A Full-Scale Temperature Drift Excluding reference 1 ppm/C V only, 5V 5% 1/4 3/4 DD Power-Supply Rejection Ratio (Change in FS) PSRR V only, -12V 10% 1/4 1 LSB SS (Note 3) V only, -15V 5% 1/4 1 SS ANALOG INPUT Input Range -5 +5 V Input Current V = +5V (approximately 6k to REF) 2.5 mA AIN Input Capacitance (Note 4) 10 pF Full-Power Input Bandwidth 1.5 MHz REFERENCE Output Voltage No external load, V = 5V, T = +25C -5 02 -4.98 V AIN A External Load Regulation 0mA < I < 5mA, V = 0V 5 mV SINK AIN Temperature Drift (Note 5) MAX12 C/E 25 ppm/C Maxim Integrated 2 www.maximintegrated.com