MAX1294 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – 420ksps, +5V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface

19-1533; Rev 0; 9/99
EVAALVUAAILTAIOBNLEKIT _{420ksps, +5V, 6-/2-Channel, 12-Bit ADCs}
with +2.5V Reference and Parallel Interface
General Description
The MAX1294/MAX1296 low-power, 12-bit analog-to-
digital converters (ADCs) feature a successive-approxi-
mation ADC, automatic power-down, fast wake-up
(2µs), on-chip clock, +2.5V internal reference, and
high-speed 12-bit parallel interface. They operate with
a single +5V analog supply.
Power consumption is only 10mW at the maximum sam-
pling rate of 420ksps. Two software-selectable power-
down modes enable the MAX1294/MAX1296 to be shut
down between conversions; accessing the parallel
interface returns them to normal operation. Powering
down between conversions can reduce supply below
10µA at lower sampling rates.
Both devices offer software-configurable analog inputs for
unipolar/bipolar and single-ended/pseudo-differential
operation. In single-ended mode, the MAX1294 has six
input channels and the MAX1296 has two (three input
channels and one input channel, respectively, when in
pseudo-differential mode).
Excellent dynamic performance and low power combined
with ease of use and small package size make these con-
verters ideal for battery-powered and data-acquisition
applications or for other circuits with demanding power-
consumption and space requirements. The MAX1294 is
offered in a 28-pin QSOP package, while the MAX1296
is available in a 24-pin QSOP. For pin-compatible +3V,
12-bit versions, see the MAX1295/MAX1297.
Industrial Control Systems
Energy Management
Data-Acquisition Systems
Applications
Data Logging
Patient Monitoring
Touchscreens
Ordering Information
PART
TEMP. RANGE
MAX1294ACEI 0°C to +70°C
MAX1294BCEI 0°C to +70°C
MAX1294AEEI -40°C to +85°C
MAX1294BEEI -40°C to +85°C
MAX1296ACEG 0°C to +70°C
MAX1296BCEG 0°C to +70°C
MAX1296AEEG -40°C to +85°C
MAX1296BEEG -40°C to +85°C
PIN-PACKAGE
28 QSOP
28 QSOP
28 QSOP
28 QSOP
24 QSOP
24 QSOP
24 QSOP
24 QSOP
INL
(LSB)
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
Features
o 12-Bit Resolution, ±0.5LSB Linearity
o Single +5V Operation
o Internal +2.5V Reference
o Software-Configurable Analog Input Multiplexer
6-Channel Single-Ended/
3-Channel Pseudo-Differential (MAX1294)
2-Channel Single-Ended/
1-Channel Pseudo-Differential (MAX1296)
o Software-Configurable Unipolar/Bipolar
Analog Inputs
o Low Current
2.0mA (420ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (shutdown)
o Internal 6MHz Full-Power Bandwidth Track/Hold
o Parallel 12-Bit Interface
o Small Footprint
28-Pin QSOP (MAX1294)
24-Pin QSOP (MAX1296)
Pin Configurations
TOP VIEW
D9 1
D8 2
D7 3
D6 4
D5 5
D4 6
D3 7
D2 8
D1 9
D0 10
INT 11
RD 12
MAX1296
24 D10
23 D11
22 V_DD
21 REF
20 REFADJ
19 GND
18 COM
17 CH0
16 CH1
15 CS
14 CLK
13 WR
QSOP
Pin Configurations continued at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].