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MAX1394ETB+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
General Description
The MAX1391/MAX1394 micropower, serial-output,
8-bit, analog-to-digital converters (ADCs) operate with a
single power supply from +1.5V to +3.6V. These ADCs
feature automatic shutdown, fast wake-up, and a high-
speed 3-wire interface. Power consumption is only
0.743mW (V
DD
= +1.5V) at the maximum conversion
rate of 416ksps. AutoShutdown™ between conversions
reduces power consumption at slower throughput rates.
The MAX1391/MAX1394 require an external reference
V
REF
that has a wide range from 0.6V to V
DD
. The
MAX1391 provides one true-differential analog input
that accepts signals ranging from 0 to V
REF
(unipolar
mode) or ±V
REF
/2 (bipolar mode). The MAX1394 pro-
vides two single-ended inputs that accept signals rang-
ing from 0 to V
REF
. Analog conversion results are
available through a 5MHz 3-wire SPI™-/QSPI™-/
MICROWIRE™-/digital signal processor (DSP)-compati-
ble serial interface. Excellent dynamic performance,
low voltage, low power, ease of use, and small pack-
age sizes make these converters ideal for portable bat-
tery-powered data-acquisition applications, as well as
other applications that demand low-power consumption
and minimal space.
The MAX1391/MAX1394 are available in a space-sav-
ing (3mm x 3mm), 10-pin TDFN package. The parts
operate over the extended (-40°C to +85°C) tempera-
ture range.
Applications
Portable Datalogging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Process Control
Features
♦ 416ksps, 8-Bit Successive-Approximation
Register (SAR) ADCs
♦ Single True-Differential Analog Input Channel
with Unipolar-/Bipolar-Selected Input (MAX1391)
♦ Dual Single-Ended Input Channel with Channel-
Selected Input (MAX1394)
♦ ±0.2 LSB INL, ±0.2 LSB DNL, No Missing Codes
♦ ±0.25 LSB Total Unadjusted Error (TUE)
♦ 49dB SINAD at 100kHz Input Frequency
♦ Single-Supply Voltage (+1.5V to +3.6V)
♦ 0.97mW at 416ksps, 1.8V
♦ 0.230mW at 100ksps, 1.8V
♦ 3.1µW at 1ksps, 1.8V
♦ < 1µA Shutdown Current
♦ External Reference (0.6V to V
DD
)
♦ AutoShutdown Between Conversions
♦ SPI-/QSPI-/MICROWIRE-/DSP-Compatible,
3- or 4-Wire Serial Interface
♦ Small (3mm x 3mm), 10-Pin TDFN
MAX1391/MAX1394
1.5V to 3.6V, 416ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 8-Bit, SAR ADCs
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-3720; Rev 1; 10/09
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.
PART TEMP RANGE PIN-PACKAGE ANALOG INPUTS TOP MARK
MAX1391ETB+ -40°C to +85°C 10 TDFN-EP* 1-CH DIFF AOX
MAX1394ETB+ -40°C to +85°C 10 TDFN-EP* 2-CH S/E APA
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
MAX1391/MAX1394
2 _______________________________________________________________________________________
1.5V to 3.6V, 416ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 8-Bit, SAR ADCs
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +1.5V to +3.6V, V
REF
= V
DD
, C
REF
= 0.1µF, f
SCLK
= 5MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (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 +4V
SCLK, CS, OE, CH1/CH2, UNI/BIP,
DOUT to GND.........................................-0.3V to (V
DD
+ 0.3V)
AIN+, AIN-, AIN1, AIN2, REF to GND ........-0.3V to (V
DD
+ 0.3V)
Maximum Current into Any Pin .........................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin TDFN (derate 18.5mW/°C above +70°C) ....1481.5mW
Operating Temperature Ranges
MAX139_E_ _...................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC ACCURACY (Note 2)
Resolution 8 Bits
Integral Nonlinearity INL ±0.2 LSB
Differential Nonlinearity DNL No missing code overtemperature ±0.2 LSB
Offset Error ±0.15 LSB
Gain Error Offset nulled ±0.15 LSB
Total Unadjusted Error TUE ±0.25 LSB
Offset-Error Temperature
Coefficient
±25 mLSB/°C
Gain-Error Temperature
Coefficient
±0.06 mLSB/°C
Channel-to-Channel Offset
Matching
MAX1394 only ±0.05 LSB
Channel-to-Channel Gain
Matching
MAX1394 only ±0.05 LSB
Input Common-Mode Rejection CMR V
CM
= 0 to V
DD
, MAX1391 only ±0.1 mV/V
DYNAMIC SPECIFICATIONS (Note 3)
Signal-to-Noise Plus Distortion SINAD 49 dB
Signal-to-Noise Ratio SNR 49 dB
Total Harmonic Distortion THD -65 dBc
Spurious-Free Dynamic Range SFDR -66 dBc
Intermodulation Distortion IMD
f
IN1
= 98kHz at -6.5dBFS,
f
IN2
= 102kHz at -6.5dBFS
-73 dB
Channel-to-Channel Crosstalk MAX1394 only -70 dB
Full-Power Bandwidth -3dB point 4 MHz
MAX1391 200
Full-Linear Bandwidth SINAD > 48dB
MAX1394 150
kHz
CONVERSION RATE
Conversion Time t
CONV
9 clock cycles per conversion 1.8 µs
MAX1391/MAX1394
_______________________________________________________________________________________ 3
1.5V to 3.6V, 416ksps, 1-Channel True-Differential/
2-Channel Single-Ended, 8-Bit, SAR ADCs
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +1.5V to +3.6V, V
REF
= V
DD
, C
REF
= 0.1µF, f
SCLK
= 5MHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Throughput Rate
12 clocks per conversion, includes power-
up acquisiton and conversion time
416 ksps
Power-Up and Acquisition Time t
ACQ
Three SCLK cycles 600 ns
Aperture Delay t
AD
8ns
Aperture Jitter t
AJ
30 ps
Serial-Clock Frequency f
CLK
0.1 5.0 MHz
ANALOG INPUTS (AIN+, AIN-, AIN1, AIN2)
Unipolar 0 V
REF
Input Voltage Range V
IN
Bipolar, MAX1391 only, (AIN+ - AIN-) -V
REF
/2 +V
REF
/2
V
Common-Mode Input Voltage
Range
V
CM
Bipolar, MAX1391 only, [(AIN+) + (AIN-)] / 2 0 V
DD
V
Input Leakage Current
Channel not selected, or conversion
stopped, or in shutdown mode
±1.5 µA
Input Capacitance 16 pF
REFERENCE INPUT (REF)
REF Input Voltage Range V
REF
0.6
V
DD
+
0.05
V
REF Input Capacitance 24 pF
REF DC Leakage Current 0.025 ±2.5 µA
REF Input Dynamic Current 416ksps 20 60 µA
DIGITAL INPUTS (SCLK, CS, OE, CH1/CH2, UNI/BIP)
Input-Voltage Low V
IL
0.3 x
V
DD
V
Input-Voltage High V
IH
0.7 x
V
DD
V
Input Hysteresis
0.06 x
V
DD
V
Input Leakage Current I
IL
Inputs at GND or V
DD
±1 µA
CS, OE 1
Input Capacitance C
IN
CH1/CH2, UNI/BIP 12.5
pF
DIGITAL OUTPUT (DOUT)
Output-Voltage Low V
OL
I
SINK
= 2mA
0.1 x
V
DD
V
Output-Voltage High V
OH
I
SOURCE
= 2mA
0.9 x
V
DD
V
Tri-State Leakage Current I
LT
OE = V
DD
±1 µA
Tri-State Output Capacitance C
OUT
OE = V
DD
10 pF
POWER SUPPLY
Positive Supply Voltage V
DD
1.5 3.6 V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

MAX1394ETB+T

Mfr. #:
Buy MAX1394ETB+T
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 8-Bit 2Ch 400ksps 3.6V Precision ADC
Lifecycle:
New from this manufacturer.
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