TLV2548 - 12 位 200kSPS ADC，具有串行输出、自动断电（软件和硬件）、低功耗、8 x FIFO 和 8 通道

TLV2548是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，TLV2548是12 位 200kSPS ADC，具有串行输出、自动断电（软件和硬件）、低功耗、8 x FIFO 和 8 通道，本站介绍了TLV2548的封装应用图解、特点和优点、功能等，并给出了与TLV2548相关的TI元器件型号供参考。

TLV2548 - 12 位 200kSPS ADC，具有串行输出、自动断电（软件和硬件）、低功耗、8 x FIFO 和 8 通道 - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品描述

The TLV2548 and TLV2544 are a family of high performance, 12-bit low power, 3.86 µs, CMOS analog-to-digital converters (ADC) which operate from a single 2.7-V to 5.5-V power supply. These devices have 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, these devices have 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 and TLV2544 are 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 TLV2544C and the TLV2548C are characterized for operation from 0°C to 70°C. The TLV2544I and the TLV2548I are characterized for operation from –40°C to 85°C.

产品特性

Maximum Throughput 200-KSPS
Built-In Reference, Conversion Clock and 8× FIFO
Differential/Integral Nonlinearity Error: ±1 LSB
Signal-to-Noise and Distortion Ratio: 70 dB, fi = 12-kHz
Spurious Free Dynamic Range: 75 dB, fi = 12- kHz
SPI (CPOL = 0, CPHA = 0)/DSP-Compatible Serial Interfaces With SCLK up to 20-MHz
Single Wide Range Supply 2.7 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, 1.1-mA at 5.5-V With External Ref
Power Down: Software/Hardware Power-Down Mode (1 µA Max, Ext Ref), Autopower-Down Mode (1 µA, Ext Ref)
Programmable Auto-Channel Sweep

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TLV2548 - 12 位 200kSPS ADC，具有串行 输出、自动断电（软件和硬件）、低功耗、8 x FIFO 和 8 通道

TLV2548 - 12 位 200kSPS ADC，具有串行输出、自动断电（软件和硬件）、低功耗、8 x FIFO 和 8 通道