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MAX1145ACAP Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1145ACAP Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 18 page General Description The MAX1144/MAX1145 are 150ksps, 14-bit ADCs. These serially interfaced ADCs connect directly to SPI™, QSPI™, and MICROWIRE™ devices without external logic. They combine an input scaling network, internal track/hold, clock, and three general-purpose digital output pins (for external multiplexer or PGA con- trol) in a 20-pin SSOP package. The excellent dynamic performance (THD ≥ 90dB), high speed (150ksps in bipolar mode), and low power (8.0mA) of these ADCs make them ideal for applications such as industrial process control, instrumentation, and medical applica- tions. The MAX1144 accepts input signals of 0 to +6V (unipo- lar) or ±6V (bipolar), while the MAX1145 accepts input signals of 0 to +2.048V (unipolar) or ±2.048V (bipolar). Operating from a single 3.135V to 3.465V analog digital supply, powerdown modes reduce current consump- tion to 0.15mA at 10ksps and further reduce supply current to less than 20µA slower data rates. A serial strobe output (SSTRB) allows direct connection to the TMS320 family digital-signal processors. The MAX1144/MAX1145 user can select either the internal clock or an external serial-interface clock for the ADC to perform analog-to-digital conversions. The MAX1144/MAX1145 feature internal calibration cir- cuitry to correct linearity and offset errors. On-demand calibration allows the user to optimize performance. Three user-programmable logic outputs are provided for the control of an 8-channel mux or PGA. The MAX1144/MAX1145 are available in a 20-pin SSOP package and are fully specified over the -40°C to +85°C temperature range. Applications Industrial Process Control Industrial I/O Modules Data-Acquisition Systems Medical Instruments Portable and Battery-Powered Equipment Features o 150ksps (Bipolar) and 125ksps (Unipolar) Sampling ADC o 14 Bits, No Missing Codes o 1LSB INL Guaranteed o -100dB THD o 3.3V Single-Supply Operation o Low-Power Operation 5mA typ (Unipolar Mode) o 1.2µA Shutdown Mode o Software-Configurable Unipolar and Bipolar Input Ranges 0 to +6V and ±6V (MAX1144) 0 to +2.048V and ±2.048V (MAX1145) o Internal or External Clock o SPI/QSPI/MICROWIRE TMS320-Compatible Serial Interface o Three User-Programmable Logic Outputs o Small 20-Pin SSOP Package 14-Bit ADCs, 150ksps, 3.3V Single Supply ________________________________________________________________ Maxim Integrated Products 1 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 AIN AGND CREF CS AVDD AGND AVDD REF TOP VIEW DIN DVDD DGND SCLK P1 P2 SHDN DGND 12 11 9 10 RST DOUT SSTRB PO MAX1144 MAX1145 SSOP Pin Configuration Ordering Information 19-2465; Rev 0; 4/02 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Ordering Information continued at end of data sheet. Functional Diagram and Typical Application Circuit appear at end of data sheet. PART TEMP RANGE PIN- PACKAGE INL (LSB) MAX1144ACAP 0 °C to +70°C 20 SSOP ±1 MAX1144BCAP 0 °C to +70°C 20 SSOP ±2 MAX1144AEAP -40 °C to +85°C 20 SSOP ±1 MAX1144BEAP -40 °C to +85°C 20 SSOP ±2 SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor, Corp. |
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