OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MAX1293ACEG

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
General Description
The MAX1291/MAX1293 low-power, 12-bit analog-to-dig-
ital converters (ADCs) feature a successive-approxima-
tion ADC, automatic power-down, fast wake-up (2µs), an
on-chip clock, +2.5V internal reference, and a high-
speed, byte-wide parallel interface. They operate with a
single +3V analog supply and feature a V
LOGIC
pin that
allows them to interface directly with a +1.8V to +5.5V
digital supply.
Power consumption is only 5.7mW (V
DD
= V
LOGIC
) at the
maximum sampling rate of 250ksps. Two software-selec-
table power-down modes enable the MAX1291/
MAX1293 to be shut down between conversions;
accessing the parallel interface returns them to normal
operation. Powering down between conversions can cut
supply current to under 10µA at reduced sampling rates.
Both devices offer software-configurable analog inputs
for unipolar/bipolar and single-ended/pseudo-differen-
tial operation. In single-ended mode, the MAX1291 has
eight input channels and the MAX1293 has four input
channels (four and two input channels, respectively,
when in pseudo-differential mode).
Excellent dynamic performance and low power, com-
bined with ease of use and small package size, make
these converters ideal for battery-powered and data-
acquisition applications or for other circuits with demand-
ing power consumption and space requirements.
The MAX1291/MAX1293 tri-states INT when CS goes
high. Refer to MAX1261/MAX1263 if tri-stating INT is not
desired.
The MAX1291 is available in a 28-pin QSOP package,
while the MAX1293 is available in a 24-pin QSOP. For
pin-compatible +5V, 12-bit versions, refer to the
MAX1290/MAX1292 data sheet.
Applications
Industrial Control Systems Data Logging
Energy Management Patient Monitoring
Data-Acquisition Systems Touch Screens
Features
♦ 12-Bit Resolution, ±0.5 LSB Linearity
♦ +3V Single Operation
♦ User-Adjustable Logic Level (+1.8V to +3.6V)
♦ Internal +2.5V Reference
♦ Software-Configurable, Analog Input Multiplexer
8-Channel Single-Ended/
4-Channel Pseudo-Differential (MAX1291)
4-Channel Single-Ended/
2-Channel Pseudo-Differential (MAX1293)
♦ Software-Configurable, Unipolar/Bipolar Inputs
♦ Low Power: 1.9mA (250ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (Shutdown)
♦ Internal 3MHz Full-Power Bandwidth Track/Hold
♦ Byte-Wide Parallel (8 + 4) Interface
♦ Small Footprint: 28-Pin QSOP (MAX1291)
24-Pin QSOP (MAX1293)
MAX1291/MAX1293
250ksps, +3V, 8-/4-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
________________________________________________________________ Maxim Integrated Products 1
19-1532; Rev 3; 12/02
PART
MAX1291ACEI
0°C to +70°C
TEMP RANGE
PIN-PACKAGE
28 QSOP
Ordering Information
Pin Configurations
±0.5
INL
(LSB)
MAX1291BCEI
0°C to +70°C
±128 QSOP
Ordering Information continued at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
1514 CH7CS
QSOP
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
1
2
3
4
5
6
7
8
9
10
11
12
13
V
LOGIC
V
DD
REF
REFADJ
GND
COM
CH0
CH1
CH2
CH3
CH4
CH5
CH6CLK
WR
RD
INT
D0/D8
D1/D9
D2/D10
D3/D11
D4
D5
D6
D7
HBEN
MAX1291
Pin Configurations continued at end of data sheet.
EVALUATION KIT
AVAILABLE
MAX1291BEEI
MAX1291AEEI
-40°C to +85°C
±1
-40°C to +85°C
±0.528 QSOP
28 QSOP
MAX1291/MAX1293
250ksps, +3V, 8-/4-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= V
LOGIC
= +2.7V to +3.6V, COM = GND, REFADJ = V
DD
, V
REF
= +2.5V, 4.7µF capacitor at REF pin, f
CLK
= 4.8MHz (50% duty
cycle); T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to GND..............................................................-0.3V to +6V
V
LOGIC
to GND.........................................................-0.3V to +6V
CH0–CH7, COM to GND............................-0.3V to (V
DD
+ 0.3V)
REF, REFADJ to GND ................................-0.3V to (V
DD
+ 0.3V)
Digital Inputs to GND ...............................................-0.3V to +6V
Digital Outputs (D0–D11, INT) to GND...-0.3V to (V
LOGIC
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
24-Pin QSOP (derate 9.5mW/°C above +70°C) ...........762mW
28-Pin QSOP (derate 8.00mW/°C above +70°C) .........667mW
Operating Temperature Ranges
MAX1291_C_ _/MAX1293_C_ _..............................0°C to +70°C
MAX1291_E_ _/MAX1293_E_ _ ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
External acquisition or external clock mode
Internal acquisition/internal clock mode
MAX129_A
External acquisition/internal clock mode
External clock mode
-3dB rolloff
SINAD > 68dB
f
IN
= 125kHz, V
IN
= 2.5V
P-P
(Note 4)
f
IN1
= 49kHz, f
IN
2
= 52kHz
MAX129_B
No missing codes over temperature
CONDITIONS
ns50Aperture Delay
ns625t
ACQ
Track/Hold Acquisition Time
µs
3.2 3.6 4.1
2.5 3.0 3.5
3.3
t
CONV
Conversion Time (Note 5)
MHz
3
Full-Power Bandwidth
kHz
250
Full-Linear Bandwidth
dB
-78
Channel-to-Channel Crosstalk
dB
76
IMDIntermodulation Distortion
dB
80
SFDRSpurious-Free Dynamic Range
dB
-78
Total Harmonic Distortion
(including 5th-order harmonic)
THD
±0.5
INLRelative Accuracy (Note 2)
Bits
12
RESResolution
dB
67 70
SINADSignal-to-Noise Plus Distortion
LSB
±0.2
Channel-to-Channel Offset
Matching
ppm/°C
±2.0
Gain Temperature Coefficient
LSB
±1
LSB
±1
DNLDifferential Nonlinearity
LSB
±4
Offset Error
LSB
±4
Gain Error (Note 3)
UNITSMIN TYP MAXSYMBOLPARAMETER
Internal acquisition/internal clock mode
External acquisition or external clock mode
<200
ps
<50
Aperture Jitter
MHz0.1 4.8f
CLK
External Clock Frequency
%30 70Duty Cycle
DC ACCURACY (Note 1)
DYNAMIC SPECIFICATIONS (f
IN(sine wave)
= 50kHz, V
IN
= 2.5V
P-P
, 250ksps, external f
CLK
= 4.8MHz, bipolar input mode)
CONVERSION RATE
MAX1291/MAX1293
250ksps, +3V, 8-/4-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= V
LOGIC
= +2.7V to +3.6V, COM = GND, REFADJ = V
DD
, V
REF
= +2.5V, 4.7µF capacitor at REF pin, f
CLK
= 4.8MHz (50% duty
cycle); T
A
= T
MIN
to T
MAX
unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER
0 to 0.5mA output load
To power down the internal reference
For small adjustments
T
A
= 0°C to +70°C
On/off-leakage current, V
IN
= 0 or V
DD
Unipolar, V
COM
= 0
V
1.0
V
DD
+
50mV
V
REF
REF Input Voltage Range
µF
4.7 10
Capacitive Bypass at REF
µF
0.01 1
Capacitive Bypass at REFADJ
mV/mA
0.2
Load Regulation (Note 7)
V
V
DD
- 1.0
REFADJ High Threshold
mV
±100
REFADJ Input Range
±20
ppm/°CTC
REF
REF Temperature Coefficient
mA
15
REF Short-Circuit Current
V
2.49 2.5 2.51
REF Output Voltage
pF
12
C
IN
Input Capacitance
µA
±0.01 ±1
Multiplexer Leakage Current
V
Analog Input Voltage Range
Single-Ended and Differential
(Note 6)
0V
REF
V
IN
CS = V
DD
I
SOURCE
= 1mA
I
SINK
= 1.6mA
V
IN
= 0 or V
DD
V
LOGIC
= 2.7V
µA
±0.1 ±1
I
LEAKAGE
Three-State Leakage Current
V
V
LOGIC
- 0.5
V
OH
Output High Voltage
V
0.4
V
OL
Output Low Voltage
pF
15
C
IN
Input Capacitance
µA
±0.1 ±1
I
IN
Input Leakage Current
mV
200
V
HYS
Input Hysteresis
2.0
CS = V
DD
pF
15
C
OUT
Three-State Output Capacitance
Bipolar, V
COM
= V
REF
/ 2
-V
REF
/2 +V
REF
/2
V
REF
= 2.5V, f
SAMPLE
= 250ksps
µA
200 300
I
REF
REF Input Current
Shutdown mode
2
V
LOGIC
= 1.8V
V
1.5
V
IH
Input High Voltage
V
LOGIC
= 1.8V
V
0.5
V
IL
Input Low Voltage
V
LOGIC
= 2.7V
0.8
ANALOG INPUTS
INTERNAL REFERENCE
EXTERNAL REFERENCE AT REF
DIGITAL INPUTS AND OUTPUTS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MAX1293ACEG

Mfr. #:
Buy MAX1293ACEG
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 12-Bit 4Ch 250ksps 3.6V Precision ADC
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet