MAX152 19-0119 Rev. 1 12/93 +3V, 8-Bit ADC with 1A Power-Down General Description Features The MAX152 high-speed, microprocessor (P)-com- Single +3.0V to +3.6V Supply patible, 8-bit analog-to-digital converter (ADC) uses a 1.8s Conversion Time half-flash technique to achieve a 1.8s conversion Power-Up in 900ns time, and digitizes at a rate of 400k samples per sec- ond (ksps). It operates with single +3V or dual 3V Internal Track/Hold supplies and accepts either unipolar or bipolar inputs. 400ksps Throughput A POWERDOWN pin reduces current consumption to a typical value of 1A. The part returns from power- Low Power: 1.5mA (Operating Mode) down and acquires an input signal in less than 900ns, 1A (Power-Down Mode) providing large reductions in supply current in applica- 300kHz Full-Power Bandwidth tions with burst-mode input signals. 20-Pin DIP, SO and SSOP Packages The MAX152 is DC and dynamically tested. Its P inter- No External Clock Required face appears as a memory location or input/output port that requires no external interface logic. The data outputs use Unipolar/Bipolar Inputs latched, three-state buffered circuitry for direct connection Ratiometric Reference Inputs to a P data bus or system input port. The ADC s input/ref- erence arrangement enables ratiometric operation. A fully- 2.7V Version Available Contact Factory assembled evaluation kit provides a proven PC board lay- out to speed prototyping and design. Ordering Information PART TEMP. RANGE PIN-PACKAGE Applications MAX152CPP 0C to +70C 20 Plastic DIP Cellular Telephones MAX152CWP 0C to +70C 20 Wide SO Portable Radios MAX152CAP 0C to +70C 20 SSOP MAX152C/D 0C to +70C Dice* Battery-Powered Systems MAX152EPP -40C to +85C 20 Plastic DIP Burst-Mode Data Acquisition MAX152EWP -40C to +85C 20 Wide SO Digital Signal Processing MAX152EAP -40C to +85C 20 SSOP Telecommunications MAX152MJP -55C to +125C 20 CERDIP** High-Speed Servo Loops * Contact factory for dice specifications. ** Contact factory for availability and processing to MIL-STD-883. Functional Diagram Pin Configuration V DD 20 TOP VIEW 12 18 V V VREF+ IN 1 20 DD PWRDN 4-BIT 11 VREF- D0 (LSB) 2 19 V FLASH SS 1 ADC V IN 3 D1 18 PWRDN D0-D7 4 17 D2 D7 (MSB) THREE- DATA 4-BIT STATE 5 16 OUT D3 D6 DAC DRIVERS MAX152 PINS WR/RDY 6 15 D5 2-5, VREF+ 4-BIT 14-17 MODE 7 14 D4 16 FLASH ADC RD 8 13 CS (4LSB) INT VREF+ 9 12 MAX152 GND VREF- TIMING AND CONTROL CIRCUITRY 10 11 10 7 6 13 89 19 DIP/SO/SSOP V GND MODE WR/RDY CS RD INT SS Maxim Integrated Products 1 Call toll free 1-800-998-8800 for free samples or literature. Evaluation Kit Manual Follows Data Sheet+3V, 8-Bit ADC with 1A Power-Down ABSOLUTE MAXIMUM RATINGS V to GND .............................................................-0.3V to +7V Continuous Power Dissipation (T = +70C) DD A V to GND..............................................................+0.3V to -7V Plastic DIP (derate 11.11mW/C above +70C) ..........889mW SS Digital Input Voltage to GND ........................-0.3V, (V + 0.3V) Wide SO (derate 10.00mW/C above +70C)..............800mW DD Digital Output Voltage to GND .....................-0.3V, (V + 0.3V) SSOP (derate 8.00mW/C above +70C) ....................640mW DD VREF+ to GND................................(V - 0.3V) to (V + 0.3V) CERDIP (derate 11.11mW/C above +70C)...............889mW SS DD VREF- to GND.................................(V - 0.3V) to (V + 0.3V) Operating Temperature Ranges: SS DD V to GND.....................................(V - 0.3V) to (V + 0.3V) MAX152C ........................................................0C to +70C IN SS DD MAX152E .....................................................-40C to +85C MAX152MJP ..................................................-55C to +125C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C 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 (Unipolar input range, V = 3.0V to 3.6V, GND = 0V, V = GND, VREF+ = 3.0V, VREF- = GND, specifications are given for RD DD SS mode (pin 7 = GND), T = T to T , unless otherwise noted.) A MIN MAX PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ACCURACY (Note 1) Resolution N 8 Bits Total Unadjusted Error TUE Unipolar range 1 LSB Differential Nonlinearity DNL No-missing-codes guaranteed 1 LSB Zero-Code Error (Note 2) Unipolar and bipolar modes 1 LSB Full-Scale Error (Note 2) Unipolar and bipolar modes 1 LSB DYNAMIC PERFORMANCE (Note 3) MAX152C/E, f = SAMPLE 45 400kHz, f = 30.273kHz IN Signal-to-Noise Plus S/(N+D) dB Distortion Ratio MAX152M, fSAMPLE = 340kHz, 45 f = 30.725kHz IN MAX152C/E, f = SAMPLE -50 400kHz, f = 30.273kHz IN Total Harmonic Distortion THD dB MAX152M, f = 340kHz, SAMPLE -50 f = 30.725kHz IN MAX152C/E, f = SAMPLE 50 400kHz, f = 30.273kHz IN Spurious-Free Dynamic Range dB MAX152M, f = 340kHz, SAMPLE 50 f = 30.725kHz IN Input Full-Power Bandwidth V = 3.0V 0.3 MHz IN p-p Maximum Input Slew Rate, Tracking 0.28 0.5 V/s ANALOG INPUT Input Voltage Range V VREF- VREF+ V IN Input Leakage Current I V < V < V 3 A IN SS IN DD Input Capacitance C 22 pF IN REFERENCE INPUT Reference Resistance RREF 12 4 k VREF+ Input Voltage Range VREF- V V DD VREF- Input Voltage Range V VREF+ V SS 2 MAX152