MAX1295 Maxim, MAX1295 Datasheet
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MAX1295
Manufacturer Part Number
MAX1295
Description
265ksps / +3V / 6-/2-Channel / 12-Bit ADCs with +2.5V Reference and Parallel Interface
Manufacturer
Maxim
Datasheet
1.MAX1295.pdf
(20 pages)
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The MAX1295/MAX1297 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 +2.7V to +3.6V analog supply.
Power consumption is only 5.4mW at the maximum
sampling rate of 265ksps. Two software-selectable
power-down modes enable the MAX1295/MAX1297 to
be shut down between conversions; accessing the par-
allel interface returns them to normal operation.
Powering down between conversions can reduce sup-
ply current below 10µA at lower sampling rates.
Both devices offer software-configurable analog inputs
for unipolar/bipolar and single-ended/pseudo-differen-
tial operation. In single-ended mode, the MAX1295 has
six input channels and the MAX1297 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 MAX1295 is
offered in a 28-pin QSOP package, while the MAX1297
comes in a 24-pin QSOP. For pin-compatible +5V, 12-bit
versions, refer to the MAX1294/MAX1296 data sheet.
19-1530; Rev 0; 9/99
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX1295ACEI
MAX1295BCEI
MAX1295AEEI
MAX1295BEEI
MAX1297ACEG
MAX1297BCEG
MAX1297AEEG
MAX1297BEEG
Industrial Control Systems
Energy Management
Data-Acquisition Systems
PART
with +2.5V Reference and Parallel Interface
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
________________________________________________________________ Maxim Integrated Products
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ordering Information
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
General Description
PIN-PACKAGE
28 QSOP
28 QSOP
28 QSOP
28 QSOP
24 QSOP
24 QSOP
24 QSOP
24 QSOP
Data Logging
Patient Monitoring
Touchscreens
Applications
(LSB)
±0.5
±1
±0.5
±1
±0.5
±1
±0.5
±1
INL
Typical Operating Circuits appear at end of data sheet.
Pin Configurations continued at end of data sheet.
12-Bit Resolution, ±0.5LSB Linearity
+3V Single-Supply Operation
Internal +2.5V Reference
Software-Configurable Analog Input Multiplexer
Software-Configurable Unipolar/Bipolar
Analog Inputs
Low Current
Internal 3MHz Full-Power Bandwidth Track/Hold
Parallel 12-Bit Interface
Small Footprint
TOP VIEW
6-Channel Single-Ended/
3-Channel Pseudo-Differential (MAX1295)
2-Channel Single-Ended/
1-Channel Pseudo-Differential (MAX1297)
1.8mA (265ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (shutdown)
28-Pin QSOP (MAX1295)
24-Pin QSOP (MAX1297)
CLK
INT
WR
RD
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
10
11
12
13
14
1
2
3
4
5
6
7
8
9
MAX1295
QSOP
Pin Configurations
28
27
26
25
24
23
22
21
20
19
18
17
16
15
D10
D11
V
REF
REFADJ
GND
COM
CH0
CH1
CH2
CH3
CH4
CH5
CS
DD
Features
1