AS1526, AS1527

10-Bit, Single Supply, Low-Power, 73ksps

A/D Converters

Produ ct Brief

www.austriamicrosystems.com

Revision 1.02

1 - 2

1 General Description

The AS1526/AS1527 are low-power, 10-bit, 73ksps ana-

log-to-digital (A/D) converters specifically designed for

single-supply A/D applications. Superior AC characteris-

tics, very low power consumption, and robust packaging

make these ultra-small devices perfect for battery-pow-

ered analog-data collection devices.

The integrated successive-approximation register (SAR)

and a fast (1.5µs) sampling track/hold time provide an

economic and highly-reliable A/D conversion solution.

The AS1526/AS1527 operate from a single 2.7 to 3.6V

supply. The AS1527 requires an external reference,

using less power than the AS1526, however, the

AS1526 features an internal 2.5V reference.

As with the AS1527, the AS1526 can also be used with

an external reference, which uses the input range 0V to

73ksps maximum sampling speed. Both devices feature

a low-current (0.3µA) shutdown mode, which reduces

power consumption at slower throughput rates.

Data accesses are made via the standard, high-speed

3-wire serial interface, which is SPI-, QSPI-, and

Microwire-compatible. Both devices contain an internal

clock, however, both devices also support an external

clock for increased flexibility.

The AS1526/AS1527 are available in an 8-pin SOIC-150

package.

Figure 1. Block Diagram and Pin Assignments

2 Key Features

!

10-Bit Resolution with 7.5µs Conversion Time

!

Sampling Rate: 73ksps

!

Straight Binary (Unipolar) Data Format

!

Single-Supply Operation:+2.7 to +3.6V

!

Internal 2.5V Reference (AS1526)

!

Low Power-Consumption:

- 4mW (73ksps, AS1526)

- 3mW (73ksps, AS1527)

- 66µW (1ksps, AS1527)

- 1µW (Shutdown Mode)

!

Integrated Track/Hold Amplifier

!

Internal Clock

!

SPI/QSPI/Microwire 3-Wire Serial Interface

!

Operating Temperature Range: -40 to +85ºC

!

8-pin SOIC-150 Package

3 Applications

The devices are ideal for remote sensors, data-acquisi-

tion, data logging devices, lab instruments, or for any

other space-limited A/D devices with low power con-

sumption and single-supply requirements.

AS1526/AS1527

Control

Logic

Output

Shift

Register

Internal

Clock

10-Bit

SAR

Track/

Hold

2.5V

Ref

AS1526/

AS1527

4

REF

AS1526

only

10-Bit

SAR

6

DOUT

5

GND

1

7

CSN

8

SCLK

3

SHDNN

2

AIN

4

REF

3

SHDNN

2

AIN

1

5GND

6DOUT

7CSN

8SCLK