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MAX1267BCEG+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
General Description
The MAX1265/MAX1267 low-power, 12-bit analog-to-
digital converters (ADCs) feature a successive-approxi-
mation ADC, automatic power-down, fast wake-up
(2µs), an on-chip clock, +2.5V internal reference, and a
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 MAX1265/MAX1267 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 MAX1265 has
six input channels and the MAX1267 has two (three
input channels and one input channel, 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
MAX1265 is offered in a 28-pin QSOP package, while the
MAX1267 comes in a 24-pin QSOP. For pin-compatible
+5V, 12-bit versions, refer to the MAX1266/MAX1268
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-Supply Operation
♦ Internal +2.5V Reference
♦ Software-Configurable Analog Input Multiplexer
6-Channel Single Ended/
3-Channel Pseudo Differential (MAX1265)
2-Channel Single Ended/
1-Channel Pseudo Differential (MAX1267)
♦ Software-Configurable Unipolar/Bipolar
Analog Inputs
♦ Low Current
1.9mA (265ksps)
1.0mA (100ksps)
400µA (10ksps)
2µA (Shutdown)
♦ Internal 3MHz Full-Power Bandwidth Track/Hold
♦ Parallel 12-Bit Interface
♦ Small Footprint
28-Pin QSOP (MAX1265)
24-Pin QSOP (MAX1267)
MAX1265/MAX1267
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
________________________________________________________________ Maxim Integrated Products 1
19-2721; Rev 0; 04/03
28 QSOP ±10°C to +70°CMAX1265BCEI
INL
(LSB)
±0.528 QSOP
PIN-PACKAGETEMP RANGE
0°C to +70°C
MAX1265ACEI
PART
Ordering Information
Pin Configurations
Typical Operating Circuits appear at end of data sheet.
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
D10
D11
V
DD
REF
REFADJ
GND
CS
COM
CH0
CH1
CH2
CH3
CH4
CH5
CLK
WR
RD
INT
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
QSOP
TOP VIEW
MAX1265
Pin Configurations continued at end of data sheet.
28 QSOP ±0.5-40°C to +85°CMAX1265AEEI
28 QSOP ±1-40°C to +85°CMAX1265BEEI
24 QSOP ±0.5-40°C to +85°CMAX1267AEEG
24 QSOP ±1-40°C to +85°CMAX1267BEEG
24 QSOP ±10°C to +70°CMAX1267BCEG
±0.524 QSOP0°C to +70°C
MAX1267ACEG
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.
MAX1265/MAX1267
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +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
CH0–CH5, 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
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
24-Pin QSOP (derate 9.5mW/°C above +70°C)..........762mW
28-Pin QSOP (derate 8.0mW/°C above +70°C)..........667mW
Operating Temperature Ranges
MAX1265_C_ _ /MAX1267_C_ _ ........................0°C to +70°C
MAX1265_E_ _ /MAX1267_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
MAX126_A
External acquisition/internal clock mode
External clock mode
-3dB rolloff
SINAD > 68dB
f
IN
= 125kHz (Note 4)
f
IN1
= 49kHz, f
IN2
= 52kHz
MAX126_B
No missing codes overtemperature
(Note 3)
CONDITIONS
ns50Aperture Delay
ns625t
ACQ
Track/Hold Acquisition Time
3.2 3.6 4.1
2.5 3.0 3.5
µs
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
Total Harmonic Distortion
(Including 5th-Order Harmonic)
-78
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
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
, 265ksps, external f
CLK
= 4.8MHz, bipolar input mode)
CONVERSION RATE
MAX1265/MAX1267
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +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
On-/off-leakage current, V
IN
= 0 or V
DD
Unipolar, V
COM
= 0
bipolar, V
COM
= V
REF
/ 2
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
REFADJ High Threshold
mV
±100
REFADJ Input Range
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)
0 V
REF
- V
REF
/2 + V
REF
/2
V
IN
CS = V
DD
I
SOURCE
= 1mA
I
SINK
= 1.6mA
V
IN
= 0 or V
DD
V
REF
= 2.5V, f
SAMPLE
= 265ksps
µA
±0.1 ±1
I
LEAKAGE
Tri-State Leakage Current
V
V
DD
- 0.5
V
OH
Output Voltage High
V
0.4
V
OL
Output Voltage Low
pF
15
C
IN
Input Capacitance
µA
±0.1 ±1
I
IN
Input Leakage Current
mV
200
V
HYS
Input Hysteresis
V
0.8
V
IL
Input Voltage Low
V
2.0
V
IH
Input Voltage High
µA
200 300
I
REF
REF Input Current
CS = V
DD
V
2.7 3.6
V
DD
Analog Supply Voltage
pF
15
C
OUT
Tri-State Output Capacitance
Internal reference
2.5 2.8
ppm/°C
±20
TC
REF
REF Temperature Coefficient
Shutdown mode
2
External reference
1.9 2.3
0.9 1.2
Positive Supply Current
Shutdown mode
210
µA
Power-Supply Rejection PSR V
DD
= 2.7V to 3.6V, full-scale input
±0.4 ±0.9
mV
I
DD
0.5 0.8
mA
Operating mode,
f
SAMPLE
= 265ksps
Internal reference
External reference
Standby mode
CONVERSION RATE (continued)
ANALOG INPUTS
INTERNAL REFERENCE
EXTERNAL REFERENCE AT REF
DIGITAL INPUTS AND OUTPUTS
POWER REQUIREMENTS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

MAX1267BCEG+T

Mfr. #:
Buy MAX1267BCEG+T
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 12-Bit 2Ch 265ksps 3.6V Precision ADC
Lifecycle:
New from this manufacturer.
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