AS1524/AS1525

Micro-Power, 12-Bit, 150ksps, ADC, Single Ended

or Differential

Produ ct Brief

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Revision 1.00

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1 General Description

The AS1524/AS1525 are low-power, 12-bit analog-to-

digital converters (ADCs) designed to operate with a sin-

gle +2.7 to +5.25V supply. Excellent dynamic perfor-

mance, low power consumption, and simplicity make

these devices perfect for portable battery-powered data-

acquisition applications.

The devices are available as the standard products

The devices feature a successive-approximation regis-

ter (SAR), automatic shutdown, fast wakeup (1.4µs),

and low-power consumption at the maximum sampling

rate of 150ksps.

Automatic shutdown (0.2µA) between conversions

results in reduced power consumption (at slower

throughput rates).

Data access are made via an external clock through the

SPI-/QSPI-/MICROWIRE-compatible 3-wire high-speed

serial interface.

The AS1525/AS1524 are available in a 8-pin TDFN

(3x3mm) package.

Figure 1. Block Diagram

2 Key Features

!

Single-Supply Operation: +2.7 to +5.25V

!

Automatic Shutdown Between Conversions

!

Low Power Consumption

- 350µA @ 150ksps

- 245µA @ 100ksps

-24µA @ 10ksps

- 2.5µA @ 1ksps

- 200nA in Automatic Shutdown Mode

!

True-Differential Track/Hold, 150kHz Sampling Rate

Software-Configurable Unipolar/Bipolar Conversion

(AS1524)

!

!

3-Wire SPI-/QSPI-/MICROWIRE-Compatible Serial

Interface

!

Internal Conversion Clock

!

8-pin TDFN (3x3mm) 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.

Table 1. Standard Products

Model

Input Type

Input Voltage

AS1524

1-Channel, Pseudo /

True-Differential

AS1525

2-Channel, Single-

Ended

AS1524/AS1525

Control

Logic

Input

Shift

Register

Osc

Track/

Hold

6

DOUT

5

GND

1

7

CNVST

8

SCLK

4

REF

12-Bit

SAR

2

AIN1/AIN+

2

AIN2/AIN-