ad5501 Analog Devices, Inc., ad5501 Datasheet

ad5501

Manufacturer Part Number

ad5501

Description

High Voltage, 12-bit Voltage Output Dac

Manufacturer

Analog Devices, Inc.

Datasheet

1.AD5501.pdf (15 pages)

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Preliminary Technical Data

FEATURES

Single channel high voltage DAC

12-bit resolution

Pin selectable 30 V or 60 V output range

Integrated Precision Reference

Low power serial interface with readback capability

Integrated Temperature Sensor Alarm function

Power-On Reset

Wide operating temperature: −40°C to +105°C

APPLICATIONS

Programmable voltage source

Programmable current source

High Voltage LED Driver

Receiver bias in optical communications

GENERAL DESCRIPTION

The AD5501 is a single channel, 12-bit, serial input, digital-to-

analog converter with an on-chip high voltage output amplifier

and an integrated precision reference. The DAC output voltage

range is programmable via the range-select pin ( R_SEL ).If

R_SEL is held high the DAC output range is 0V to 30 V. If

R_SEL is held low the DAC output range is 0V to 60 V. The on-

chip output amplifiers allow an output swing within the range

of AGND + 0.2 V and V

The AD5501 has a high-speed serial interface, which is

compatible with SPI

interface standards and can handle clock speeds of up to

30MHz. The serial interface offers the user the capability of

both writing-to and reading-from most internal registers.

To reduce power consumption on power up, only the digital

section of the AD5501 is powered up initially. This gives the

user the ability to program the DAC registers to the required

value while only consuming typically 23

The AD5501 incorporates power-on-reset circuitry which

ensures the DAC registers powers up in a known condition and

remains there until a valid write to the device has taken place.

The analog section is powered up by issuing a power-up

Rev. Pr B

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

, QSPI

–0.5 V.

™

,MICROWIRE

A of supply current.

™

,and DSP

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

command via the SPI interface. The AD5501 provides software-

selectable output loads while in the power-down mode.

The AD5501 has on on-chip temperature sensor. If the

temperature on the die exceeds 130ºC the ALARM pin, an active

low CMOS output pin, flags an alarm and the AD5501 enters a

temperature power-down mode disconnecting the output

amplifier thus removing the short circuit condition. The AD5501

remains in power down mode until a software power-up

command is executed.

The AD5501 is available in a compact 16-lead TSSOP. The

AD5501 is guaranteed to operate over the extended temperature

range of −40°C to +105°C.

ALARM

SYNC

LDAC

SCLK

SDO

SDI

12-Bit Voltage Output DAC

LOGIC

FUNCTIONAL BLOCK DIAGRAM

CLR

CONTROL

POWER-ON

LOGIC

INPUT

RESET

DAC

R_SEL

DGND

TEMPERATURE

REFERENCE

PRECISION

Figure 1.

SENSOR

REF(+)

12-BIT

DAC

CONTROL LOGIC

POWER-DOWN

122.36KΩ

High Voltage,

OUTPUT

BUFFER

1713KΩ

AD5501

www.analog.com

AGND

RESISTOR

NETWORK

AD5501

OUT

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