ADS7886SBDCKR.A中文资料德州仪器数据手册PDF规格书

1 Features

1• 1-MHz Sample Rate Serial Device

• 12-Bit Resolution

• Zero Latency

• 20-MHz Serial Interface

• Supply Range: 2.35 V to 5.25 V

• Typical Power Dissipation at 1 MSPS:

– 3.9 mW at 3-V VDD

– 7.5 mW at 5-V VDD

• INL ±1.25 LSB Maximum, ±0.65 LSB (Typical)

• DNL ±1 LSB Maximum, +0.4 / –0.65 LSB (Typical)

• Typical AC Performance:

72.25-dB SINAD, –84-dB THD

• Unipolar Input Range: 0 V to VDD

• Power Down Current: 1 μA

• Wide Input Bandwidth: 15 MHz at 3 dB

• 6-Pin SOT-23 and SC70 Packages

2 Applications

• Base Band Converters in Radio

Communication

• Motor Current and Bus Voltage Sensors in Digital

Drives

• Optical Networking (DWDM, MEMS Based

Switching)

• Optical Sensors

• Battery-Powered Systems

• Medical Instrumentations

• High-Speed Data Acquisition Systems

• High-Speed Closed-Loop Systems

3 Description

The ADS7886 is a 12-bit, 1-MSPS analog-to-digital

converter (ADC). The device includes a capacitor

based SAR A/D converter with inherent sample and

hold. The serial interface in each device is controlled

by the CS and SCLK signals for glueless connections

with microprocessors and DSPs. The input signal is

sampled with the falling edge of CS, and SCLK is

used for conversion and serial data output.

The device operates from a wide supply range from

2.35 V to 5.25 V. The low power consumption of the

device makes it suitable for battery-powered

applications. The device also includes a power down

feature for power saving at lower conversion speeds.

The high level of the digital input to the device is not

limited to device VDD. This means the digital input can

go as high as 5.25 V when device supply is 2.35 V.

This feature is useful when digital signals are coming

from other circuit with different supply levels. Also this

relaxes restriction on power-up sequencing.

The ADS7886 is available in 6-pin SOT-23 and SC70

packages and is specified for operation from –40°C to

125°C.