MX7672 High-Speed 12-Bit ADC With External Reference Input Part General Description Features The MX7672 is a 12-bit, high-speed, BiCMOS, analog-to- Plug-In Replacement for AD7672 digital converter (ADC) that performs conversions in as 12-Bit Resolution and Accuracy little as 3s while consuming only 110mW of power. The Fast Conversion Time MX7672 is a plug-in replacement for AD7672. MX7672 03 - 3s The MX7672 requires an external -5V reference. A buff- MX7672 05 - 5s ered reference input minimizes reference current require- MX7672 10 - 10s ments and allows a single reference to drive several Operates with +5V and -12V Supplies ADCs. External reference specifications can be chosen Buffered Reference Input to suit the accuracy of the application. The ADC clock can be driven from either a crystal or an external clock source, Low 110mW Power Consumption such as a microprocessor (P) clock. Choice of +5V, +10V, or 5V Input Ranges Average input range is pin-selectable for 0 to +5V, 0 to Fast 125ns Bus-Access Time +10V, or 5V, making the ADC ideal for data-acquisition and analog input/output cards. A high-speed digital inter- Ordering Information appears at end of data sheet. face (125ns data-access time) with three-state data out- puts is compatible with most Ps. Pin Configurations Applications Telecommunications TOP VIEW Sonar and Radar Signal Processing + High-Speed Data-Acquisition Systems 1 AIN1 AIN2 24 Personal Computer I/O Boards 2 23 V V REF DD Functional Diagram 3 AGND V 22 SS 4 D11 (MSB) BUSY 21 5 D10 CS 20 MX7672 6 D9 RD 19 7 D8 CLKOUT 18 8 D7 CLKIN 17 9 D6 D0 16 10 D5 D1 15 11 D4 D2 14 12 DGND D3 13 PDIP Pin Configurations continued on last page 19-3126 Rev 1 1/12MX7672 High-Speed 12-Bit ADC With External Reference Input Part Absolute Maximum Ratings V to DGND ..........................................................-0.3V to +7V Operating Temperature Ranges DD V to DGND ........................................................+0.3V to -17V MX7672K /L ....................................................0C to +70C SS AGND to DGND ....................................... -0.3V to (V + 0.3V) MX7672B /C ............................................... -40C to +85C DD AIN1, AIN2 to AGND ..............................................-15V to +15V MX7672T /U ............................................. -55C to +125C V to AGND ..............................(V - 0.3V) to (V + 0.3V) Storage Temperature Range ............................ -65C to +150C REF SS DD Digital Input Voltage to DGND Lead Temperature (soldering, 10s) .................................+300C (CLKIN, CS, RD) .................................. -0.3V to (V + 0.3V) Soldering Temperature (reflow) DD Digital Output Voltage to DGND PDIP, LCC ...................................................................+260C (D11D0, BUSY, CLKOUT) .................. -0.3V to (V + 0.3V) PLCC ...........................................................................+245C DD Continuous Power Dissipation (T = +70C) A PDIP (derate 13.3mW/C above +70C) ...................1067mW PLCC (derate 10.5mW/C above +70C) ....................842mW LCC (derate 10.2mW/C above +70C) ......................816mW 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 = +5V 5%, V = -12V 10%, V = -5V, slow-memory mode f = 4MHz for MX7672 03, f = 2.5MHz for MX7672 DD SS REF CLK CLK 05, f = 1.25MHz for MX7672 10 T = T to T , unless otherwise noted.) CLK A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ACCURACY (Note 1) Resolution N 12 Bits MX7672C/L 1/2 MX7672U, T = +25C 1/2 A Integral Nonlinearity INL Tested range 5V LSB MX7672U 3/4 MX7672B/K/T 1 Differential Nonlinearity DNL 12 bits, no missing codes over temperature 0.9 LSB T = +25C 3 A MX7672C/L/U T = T to T 4 A MIN MAX Unipolar Offset Error LSB T = +25C 5 A MX7672B/K/T T = T to T 6 A MIN MAX T = +25C 4 A MX7672C/L/U T = T to T 6 A MIN MAX Unipolar Gain Error LSB T = +25C 5 A MX7672B/K/T T = T to T 7 A MIN MAX T = +25C 3 A MX7672C/L/U T = T to T 4 A MIN MAX Bipolar Zero Error LSB T = +25C 5 A MX7672B/K/T T = T to T 6 A MIN MAX T = +25C 4 A MX7672C/L/U T = T to T 6 A MIN MAX Bipolar Gain Error LSB T = +25C 5 A MX7672B/K/T T = T to T 7 A MIN MAX Maxim Integrated 2 www.maximintegrated.com