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TLV2548-EP Datasheet(PDF) 1 Page - Texas Instruments |
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TLV2548-EP Datasheet(HTML) 1 Page - Texas Instruments |
1 / 38 page 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 SDO SDI SCLK EOC/(INT) VCC A0 A1 A2 A3 A4 CS REFP REFM FS PWDN GND CSTART A7 A6 A5 PW PACKAGE (TOP VIEW) TLV2548-EP www.ti.com SLAS668 – OCTOBER 2009 3.0-V TO 5.5-V, 12-BIT, 200-KSPS, 4-/8-CHANNEL, LOW-POWER SERIAL ANALOG-TO-DIGITAL CONVERTER WITH AUTOPOWER-DOWN Check for Samples: TLV2548-EP 1 FEATURES SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS • Maximum Throughput 200-KSPS • Controlled Baseline • Built-In Reference, Conversion Clock and • One Assembly/Test Site 8x FIFO • One Fabrication Site • Differential/Integral Nonlinearity Error: ±1.2 • Available in Military (–55°C/125°C) LSB Temperature Range(1) • Signal-to-Noise and Distortion Ratio: 70 dB, • Extended Product Life Cycle fi = 12 kHz • Extended Product-Change Notification • Spurious Free Dynamic Range: 75 dB, • Product Traceability fi = 12 kHz • SPI (CPOL = 0, CPHA = 0)/DSP-Compatible Serial Interfaces With SCLK up to 20 MHz • Single Wide Range Supply 3.0 Vdc to 5.5 Vdc • Analog Input Range 0 V to Supply Voltage With 500-kHz BW • Hardware Controlled and Programmable Sampling Period • Low Operating Current (1.0 mA at 3.3 V, 2.0 mA at 5.5 V With External Ref, 1.7-mA at 3.3V, 2.4-mA at 5.5-V With Internal Ref) • Power Down: Software/Hardware Power-Down Mode (1 μA Max, Ext Ref), Autopower-Down Mode (1 μA, Ext Ref) • Programmable Auto-Channel Sweep (1) Custom temperature ranges available DESCRIPTION The TLV2548 is a high performance, 12-bit low-power, 3.86- μs, CMOS analog-to-digital converter (ADC) which operates from a single 3.0-V to 5.5-V power supply. This device has three digital inputs and a 3-state output [chip select (CS), serial input-output clock (SCLK), serial data input (SDI), and serial data output (SDO)] that provide a direct 4-wire interface to the serial port of most popular host microprocessors (SPI interface). When interfaced with a TI DSP, a frame sync (FS) signal is used to indicate the start of a serial data frame. In addition to a high-speed A/D converter and versatile control capability, this device has an on-chip analog multiplexer that can select any analog inputs or one of three internal self-test voltages. The sample-and-hold function is automatically started after the fourth SCLK edge (normal sampling) or can be controlled by a special pin, CSTART, to extend the sampling period (extended sampling). The normal sampling period can also be programmed as short (12 SCLKs) or as long (24 SCLKs) to accommodate faster SCLK operation popular among high-performance signal processors. The TLV2548 is designed to operate with very low power consumption. The power-saving feature is further enhanced with software/hardware/autopower-down modes and programmable conversion speeds. The conversion clock (OSC) and reference are built-in. The converter can use the external SCLK as the source of the conversion clock to achieve higher (up to 2.8 μs when a 20-MHz SCLK is used) conversion speed. Two different internal reference voltages are available. An optional external reference can also be used to achieve maximum flexibility. The TLV2548 is characterized for operation from –55°C to 125°C. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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