The MAX1447/MAX1496/MAX1498 low-power, 3.5- and
4.5-digit, analog-to-digital converters (ADCs) with integrated
light-emitting diode (LED) drivers operate from a
single 2.7V to 5.25V power supply. They include an
internal reference, a high-accuracy on-chip oscillator,
and a multiplexed LED display driver. An internal charge
pump generates the negative supply needed to power
the integrated input buffers for single-supply operation.
The ADC is configurable for either a ±2V or ±200mV
input range and it outputs its conversion results to an
LED. The MAX1496 is a 3.5-digit (±1999 count) device
and the MAX1447/MAX1498 are 4.5-digit (±19,999
count) devices.
The MAX1447/MAX1496/MAX1498 do not require external
precision integrating capacitors, autozero capacitors,
crystal oscillators, charge pumps, or other circuitry
required with dual-slope ADCs (commonly used in
panel meter circuits).
These devices also feature on-chip buffers for the differential
signal and reference input, allowing direct
interface with high-impedance signal sources. In addition,
they use continuous internal offset-calibration and
offer >100dB rejection of 50Hz and 60Hz line noise.
Other features include data hold and peak detection
and overrange/underrange detection. The MAX1447
features on-demand enhanced offset calibration for
improved offset performance.
The MAX1447/MAX1498 are available in a 32-pin, 7mm
x 7mm TQFP package and the MAX1496 is available in
28-pin SSOP and 28-pin PDIP packages. All devices in
this family operate over the -40°C to +85°C extended
temperature range.
Key Features
Applications/Uses
High Resolution
MAX1447/MAX1498: 4.5 Digits (±19,999 Count)
MAX1496: 3.5 Digits (±1999 Count)
Sigma-Delta ADC Architecture
No Integrating Capacitors Required
No Autozeroing Capacitors Required
>100dB of Simultaneous 50Hz and 60Hz Rejection
Selectable Input Range of ±200mV or ±2V
Selectable Voltage Reference: Internal 2.048V or External
Internal High-Accuracy Oscillator Needs No External Components
Automatic Offset Calibration
On-Demand Enhanced Offset Calibration (MAX1447)
Operate from a Single 2.7V to 5.25V Supply
Low Power (Exclude LED-Driver Current)
Maximum 744µA Operating Current (MAX1496)
Maximum 960µA Operating Current (MAX1447/MAX1498)
Maximum 325µA Shutdown Current
Multiplexed Common-Cathode LED Drivers
Resistor-Programmable Segment Current
Small 32-Pin, 7mm x 7mm TQFP Package (4.5 Digits), 28-Pin SSOP Package (3.5 Digits)
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
Download
E-Mail
