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MAX11645EUA+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
General Description
The MAX11644/MAX11645 low-power, 12-bit, 1-/2-
channel analog-to-digital converters (ADCs) feature
internal track/hold (T/H), voltage reference, clock, and
an I
2
C-compatible 2-wire serial interface. These
devices operate from a single supply of 2.7V to 3.6V
(MAX11645) or 4.5V to 5.5V (MAX11644) and require
only 6μA at a 1ksps sample rate. AutoShutdown™ pow-
ers down the devices between conversions, reducing
supply current to less than 1μA at low throughput rates.
The MAX11644/MAX11645 each measure two single-
ended or one differential input. The fully differential ana-
log inputs are software configurable for unipolar or
bipolar, and single-ended or differential operation.
The full-scale analog input range is determined by the
internal reference or by an externally applied reference
voltage ranging from 1V to V
DD
. The MAX11645 fea-
tures a 2.048V internal reference and the MAX11644
features a 4.096V internal reference.
The MAX11644/MAX11645 are available in an ultra-tiny
1.9mm x 2.2mm WLP package and an 8-pin μMAX
®
package. The MAX11644/MAX11645 are guaranteed
over the extended temperature range (-40°C to +85°C).
For pin-compatible 10-bit parts, refer to the MAX11646/
MAX11647 data sheet.
Applications
Features
♦ Ultra-Tiny 1.9mm x 2.2mm Wafer Level Package
♦ High-Speed I
2
C-Compatible Serial Interface
400kHz Fast Mode
1.7MHz High-Speed Mode
♦ Single-Supply
2.7V to 3.6V (MAX11645)
4.5V to 5.5V (MAX11644)
♦ Internal Reference
2.048V (MAX11645)
4.096V (MAX11644)
♦ External Reference: 1V to V
DD
♦ Internal Clock
2-Channel Single-Ended or 1-Channel Fully
Differential
♦ Internal FIFO with Channel-Scan Mode
♦ Low Power
670µA at 94.4ksps
230µA at 40ksps
60µA at 10ksps
6µA at 1ksps
0.5µA in Power-Down Mode
♦ Software-Configurable Unipolar/Bipolar
MAX11644/MAX11645
Low-Power, 1-/2-Channel, I
2
C, 12-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-5225; Rev 1; 9/10
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE
PIN-
PACKAGE
I
2
C SLAVE
ADDRESS
MAX11644EUA+ -40°C to +85°C 8 μMAX 0110110
MAX11645EUA+ -40°C to +85°C 8 μMAX 0110110
MAX11645EWC+ -40°C to +85°C 12 WLP 0110110
Typical Operating Circuit and Selector Guide appear at end
of data sheet.
AutoShutdown is a trademark and μMAX is a registered trademark
of Maxim Integrated Products, Inc.
+
Denotes a lead(Pb)-free/RoHs-compliant package.
Handheld Portable
Applications
Medical Instruments
Battery-Powered Test
Equipment
Solar-Powered Remote
Systems
Received-Signal-Strength
Indicators
System Supervision
Power-Supply Monitoring
MAX11644/MAX11645
Low-Power, 1-/2-Channel, I
2
C, 12-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= 2.7V to 3.6V (MAX11645), V
DD
= 4.5V to 5.5V (MAX11644), V
REF
= 2.048V (MAX11645), V
REF
= 4.096V (MAX11644),
f
SCL
= 1.7MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C, see Tables 1–5 for programming
notation.) (Note 1)
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
AIN0, AIN1, REF to GND ..............................-0.3V to the lower of
(V
DD
+ 0.3V) and 6V
SDA, SCL to GND.....................................................-0.3V to +6V
Maximum Current into Any Pin .........................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin μMAX (derate 4.5mW/°C above +70°C) ..............362mW
12-Pin WLP (derate 16.1mW/°C above +70°C) ..........1288mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s)
μMAX only.....................................................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC ACCURACY (Note 2)
Resolution 12 Bits
Relative Accuracy INL (Note 3) ±1 LSB
Differential Nonlinearity DNL No missing codes over temperature ±1 LSB
Offset Error ±4 LSB
Offset-Error Temperature
Coefficient
Relative to FSR 0.3 ppm/°C
Gain Error (Note 4) ±4 LSB
Gain-Temperature Coefficient Relative to FSR 0.3 ppm/°C
Channel-to-Channel Offset
Matching
±0.1 LSB
Channel-to-Channel Gain
Matching
±0.1 LSB
DYNAMIC PERFORMANCE (f
IN(SINE-WAVE)
= 10kHz, V
IN(P-P)
= V
REF
, f
SAMPLE
= 94.4ksps)
Signal-to-Noise Plus Distortion SINAD 70 dB
Total Harmonic Distortion THD Up to the 5th harmonic -78 dB
Spurious-Free Dynamic Range SFDR 78 dB
Full-Power Bandwidth SINAD > 68dB 3 MHz
Full-Linear Bandwidth -3dB point 5 MHz
CONVERSION RATE
Internal clock 7.5
Conversion Time (Note 5) t
CONV
External clock 10.6
μs
Internal clock, SCAN[1:0] = 01 51
Throughput Rate f
SAMPLE
External clock 94.4
ksps
Track/Hold Acquisition Time 800 ns
Internal Clock Frequency 2.8 MHz
External clock, fast mode 60
Aperture Delay (Note 6) t
AD
External clock, high-speed mode 30
ns
MAX11644/MAX11645
Low-Power, 1-/2-Channel, I
2
C, 12-Bit ADCs
in Ultra-Tiny 1.9mm x 2.2mm Package
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 2.7V to 3.6V (MAX11645), V
DD
= 4.5V to 5.5V (MAX11644), V
REF
= 2.048V (MAX11645), V
REF
= 4.096V (MAX11644),
f
SCL
= 1.7MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C, see Tables 1–5 for programming
notation.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ANALOG INPUT (AIN0/AIN1)
Unipolar 0 V
REFInput Voltage Range, Single-
Ended and Differential (Note 7)
Bipolar 0 ±V
REF
/2
V
Input Multiplexer Leakage
On/off leakage current, V
AIN
_ = 0 or V
DD
±0.01 ±1 μA
Input Capacitance C
IN
22 pF
INTERNAL REFERENCE (Note 8)
MAX11645 1.968 2.048 2.128
Reference Voltage V
REF
T
A
= +25°C
MAX11644 3.936 4.096 4.256
V
Reference-Voltage Temperature
Coefficient
TCV
REF
25 ppm/°C
REF Short-Circuit Current 2 mA
REF Source Impedance 1.5 k
EXTERNAL REFERENCE
REF Input Voltage Range V
REF
(Note 9) 1 V
DD
V
REF Input Current I
REF
f
SAMPLE
= 94.4ksps 40 μA
DIGITAL INPUTS/OUTPUTS (SCL, SDA)
Input-High Voltage V
IH
0.7 x V
DD
V
Input-Low Voltage V
IL
0.3 x V
DD
V
Input Hysteresis V
HYST
0.1 x V
DD
V
Input Current I
IN
V
IN
= 0 to V
DD
±10 μA
Input Capacitance C
IN
15 pF
Output Low Voltage V
OL
I
SINK
= 3mA 0.4 V
POWER REQUIREMENTS
MAX11645 2.7 3.6
Supply Voltage V
DD
MAX11644 4.5 5.5
V
Internal reference 900 1150
f
SAMPLE
= 94.4ksps
external clock
External reference 670 900
Internal reference 530
f
SAMPLE
= 40ksps
internal clock
External reference 230
Internal reference 380
f
SAMPLE
= 10ksps
internal clock
External reference 60
Internal reference 330
f
SAMPLE
=1ksps
internal clock
External reference 6
Supply Current I
DD
Shutdown (internal REF off) 0.5 10
μA
Power-Supply Rejection Ratio PSRR Full-scale input (Note 10) ±0.5 ±2.0 LSB/V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

MAX11645EUA+

Mfr. #:
Buy MAX11645EUA+
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 12-Bit 2Ch 94.4ksps 3.6V Precision ADC
Lifecycle:
New from this manufacturer.
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