DAC7565A中文资料德州仪器数据手册PDF规格书

1FEATURES

234• Relative Accuracy: 0.5LSB

• Glitch Energy: 0.15nV-s

• Internal Reference:

– 2.5V Reference Voltage (enabled by default)

– 0.004% Initial Accuracy (typ)

– 2ppm/°C Temperature Drift (typ)

– 5ppm/°C Temperature Drift (max)

– 20mA Sink/Source Capability

• Power-On Reset to Zero-Scale or Mid-Scale

• Asynchronous Clear to Zero-Scale or

Mid-Scale

• Ultra-Low Power Operation: 1mA at 5V

• Wide Power-Supply Range: +2.7V to +5.5V

• 12-Bit Monotonic Over Temperature Range

• Settling Time: 10μs to ±0.024% Full-Scale

Range (FSR)

• Low-Power Serial Interface with

Schmitt-Triggered Inputs: Up to 50MHz

• On-Chip Output Buffer Amplifier with

Rail-to-Rail Operation

• 1.8V to 5.5V Logic Compatibility

• Temperature Range: –40°C to +105°C

APPLICATIONS

• Portable Instrumentation

• Closed-Loop Servo-Control

• Process Control, PLCs

• Data Acquisition Systems

• Programmable Attenuation

• PC Peripherals

DESCRIPTION

The DAC7565 is a low-power, voltage-output,

four-channel, 12-bit digital-to-analog converter (DAC).

The device includes a 2.5V, 2ppm/°C internal

reference (enabled by default), giving a full-scale

output voltage range of 2.5V. The internal reference

has an initial accuracy of 0.02% and can source up to 20mA at the VREFH/VREFOUT pin. The device is

monotonic, provides very good linearity, and

minimizes undesired code-to-code transient voltages

(glitch). The DAC7565 uses a versatile 3-wire serial

interface that operates at clock rates up to 50MHz.

The interface is compatible with standard SPI™,

QSPI™, Microwire™, and digital signal processor

(DSP) interfaces.

The DAC7565 incorporates a power-on-reset circuit

that ensures the DAC output powers up at either

zero-scale or mid-scale until a valid code is written to the device. The device contains a power-down

feature, accessed over the serial interface, that

reduces the current consumption of the device to

1.3μA at 5V. Power consumption is 2.9mW at 3V,

reducing to 1.5μW in power-down mode. The low

power consumption, internal reference, and small

footprint make this device ideal for portable,

battery-operated equipment.

The DAC7565 is drop-in and functionally compatible

with the DAC8165 and DAC8565, and functionally

compatible with the DAC7564, DAC8164 and

DAC8564. All these devices are available in a

TSSOP-16 package.