MAX1422ECM ,12-Bit, 20Msps, 3.3V, Low-Power ADC with Internal ReferenceELECTRICAL CHARACTERISTICS(V = V = 3.3V, AGND = DGND = 0, V = ±1.024V, differential input voltage a ..
MAX1425EAI ,10-Bit / 20Msps ADCApplicationsPin ConfigurationMedical Ultrasound ImagingTOP VIEWCCD Pixel ProcessingIR Focal Plane A ..
MAX1426EAI ,10-Bit / 10Msps ADCApplicationsPin ConfigurationMedical Ultrasound ImagingTOP VIEWCCD Pixel ProcessingIR Focal Plane A ..
MAX1426EAI-T ,10-Bit, 10Msps ADCApplicationsPin ConfigurationMedical Ultrasound ImagingCCD Pixel Processing TOP VIEW+IR Focal Plane ..
MAX1444EHJ ,10-Bit / 40Msps / 3.0V / Low-Power ADC with Internal ReferenceELECTRICAL CHARACTERISTICS(V = 3V; OV = 2.7V; 0.1µF and 1µF capacitors from REFP, REFN, and COM to ..
MAX1446EHJ+ ,10-Bit, 60Msps, 3.0V, Low-Power ADC with Internal ReferenceELECTRICAL CHARACTERISTICS(V = 3.0V, OV = 2.7V; 0.1µF and 1.0µF capacitors from REFP, REFN, and COM ..
MAX4040EUK ,Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op Ampsapplications.Ordering InformationThe MAX4040 is offered in a space-saving 5-pin SOT23PIN- SOT packa ..
MAX4040EUK+ ,Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op AmpsELECTRICAL CHARACTERISTICS—T = +25°C (continued)A(V = +5.0V, V = 0V, V = 0V, V = V / 2, SHDN = V , ..
MAX4040EUK-T ,Single/Dual/Quad / Low-Cost / SOT23 / Micropower Rail-to-Rail I/O Op Ampsapplications.Ordering InformationThe MAX4040 is offered in a space-saving 5-pin SOT23PIN- SOT packa ..
MAX4040EUK-T ,Single/Dual/Quad / Low-Cost / SOT23 / Micropower Rail-to-Rail I/O Op Ampsapplications.Ordering InformationThe MAX4040 is offered in a space-saving 5-pin SOT23PIN- SOT packa ..
MAX4041ESA ,Single/Dual/Quad / Low-Cost / SOT23 / Micropower Rail-to-Rail I/O Op AmpsFeaturesThe MAX4040–MAX4044 family of micropower op amps' Single-Supply Operation Down to +2.4Voper ..
MAX4041ESA+ ,Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O Op AmpsMAX4040–MAX404419-1377; Rev 1; 9/05Single/Dual/Quad, Low-Cost, SOT23, Micropower Rail-to-Rail I/O O ..
MAX1422ECM
12-Bit, 20Msps, 3.3V, Low-Power ADC with Internal Reference
General DescriptionThe MAX1422 3.3V, 12-bit analog-to-digital converter
(ADC) features a fully differential input, pipelined, 12-
stage ADC architecture with wideband track-and-hold
(T/H) and digital error correction incorporating a fully-dif-
ferential signal path. The MAX1422 is optimized for low-
power, high dynamic performance applications in
imaging and digital communications. The converter
operates from a single 3.3V supply, consuming only
137mW while delivering a 67dB (typ) signal-to-noise
ratio (SNR) at a 5MHz input frequency and a 20Msps
sampling frequency. The fully-differential input stage
has a small signal -3dB bandwidth of 400MHz and may
be operated with single-ended inputs.
An internal 2.048V precision bandgap reference sets
the ADCs full-scale range. A flexible reference structure
accommodates an internally or externally applied
buffered or unbuffered reference for applications
requiring increased accuracy or a different input volt-
age range.
In addition to low operating power, the MAX1422 features
two power-down modes, a reference power-down, and a
shutdown mode. In reference power-down, the internal
bandgap reference is deactivated, resulting in a 2mA
(typ) supply current reduction. For idle periods, a full
shutdown mode is available to maximize power savings.
The MAX1422 provides parallel, offset binary, CMOS-
compatible three-state outputs.
The MAX1422 is available in a 7mm ✕ 7mm ✕ 1.4mm,
48-pin TQFP package and is specified over the com-
mercial (0°C to +70°C) and extended industrial (-40°C
to +85°C) temperature ranges.
Pin-compatible higher-speed versions of the MAX1422
are also available. Please refer to the MAX1421 data
sheet for 40Msps and the MAX1420 data sheet for
60Msps.
________________________ApplicationsMedical Ultrasound Imaging
CCD Pixel Processing
Data Acquisition
Radar
IF and Baseband Digitization
FeaturesSingle 3.3V Power Supply67dB SNR at fIN= 5MHzInternal 2.048V Precision Bandgap ReferenceDifferential Wideband Input T/H AmplifierPower-Down Modes
130mW (Reference Shutdown Mode)
10µW (Shutdown Mode)Space-Saving 48-Pin TQFP Package
MAX1422
12-Bit, 20Msps, 3.3V, Low-Power ADC with
Internal Reference
Pin Configuration19-1899; Rev 1; 5/04
Ordering Information
Functional Diagram appears at end of data sheet.
MAX1422
12-Bit, 20Msps, 3.3V, Low-Power ADC with
Internal Reference
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VAVDD= VDVDD= 3.3V, AGND = DGND = 0, VIN= ±1.024V, differential input voltage at -0.5dBFS, internal reference, fCLK= 20MHz (50%
duty cycle); digital output load CL= 10pF, ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.
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.
AVDD, DVDDto AGND..............................................-0.3V to +4V
DVDD, AVDDto DGND..............................................-0.3V to +4V
DGND to AGND.....................................................-0.3V to +0.3V
INP, INN, REFP, REFN, REFIN,
CML,CLK, CLK, ....................(AGND - 0.3V) to (AVDD+ 0.3V)
D0–D11, OE, PD.......................(DGND - 0.3V) to (DVDD+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
48-Pin TQFP (derate 21.7mW/°C above +70°C)........1739mW
Operating Temperature Ranges
MAX1422CCM....................................................0°C to +70°C
MAX1422ECM.................................................-40°C to +85°C
Maximum Junction Temperature.....................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX1422
12-Bit, 20Msps, 3.3V, Low-Power ADC with
Internal Reference
ELECTRICAL CHARACTERISTICS (continued)(VAVDD= VDVDD= 3.3V, AGND = DGND = 0, VIN= ±1.024V, differential input voltage at -0.5dBFS, internal reference, fCLK= 20MHz (50%
duty cycle); digital output load CL= 10pF, ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.
MAX1422
12-Bit, 20Msps, 3.3V, Low-Power ADC with
Internal Reference
ELECTRICAL CHARACTERISTICS (continued)(VAVDD= VDVDD= 3.3V, AGND = DGND = 0, VIN= ±1.024V, differential input voltage at -0.5dBFS, internal reference, fCLK= 20MHz (50%
duty cycle); digital output load CL= 10pF, ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.
Note 2:External 2.048V reference applied to REFIN.
Note 3:Internal reference disabled. VREFIN= 0, VREFP= 2.162V, VCML= 1.65V, and VREFN= 1.138V.
Note 4:IMD is measured with respect to either of the fundamental tones.
Note 5:Specifies the common-mode range of the differential input signal supplied to the MAX1422.
Note 6:VDIFF= VREFP- VREFN.
Note 7:Input bandwidth is measured at a 3dB level.
Note 8:VREFINis internally biased to 2.048V through a 10kΩresistor.
Note 9:Measured as the ratio of the change in mid-scale offset voltage for a ±5% change in VAVDD, using the internal reference.
MAX1422
12-Bit, 20Msps, 3.3V, Low-Power ADC with
Internal Reference
Typical Operating Characteristics(VAVDD= VDVDD= 3.3V, AGND = DGND = 0, VIN= ±1.024V, differential input drive, AIN= -0.5dBFS, fCLK= 20MHz (50% duty
cycle) digital output load CL= 10pF, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
MAX1422
12-Bit, 20Msps, 3.3V, Low-Power ADC with
Internal Reference
Typical Operating Characteristics (continued)(VAVDD= VDVDD= 3.3V, AGND = DGND = 0, VIN= ±1.024V, differential input drive, AIN= -0.5dBFS, fCLK= 20MHz (50% duty
cycle) digital output load CL= 10pF, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
MAX1422
12-Bit, 20Msps, 3.3V, Low-Power ADC with
Internal Reference
Typical Operating Characteristics (continued)(VAVDD= VDVDD= 3.3V, AGND = DGND = 0, VIN= ±1.024V, differential input drive, AIN= -0.5dBFS, fCLK= 20MHz (50% duty
cycle) digital output load CL= 10pF, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
MAX1422
Detailed DescriptionThe MAX1422 uses a 12-stage, fully differential,
pipelined architecture (Figure 1), that allows for high-
speed conversion while minimizing power consump-
tion. Each sample moves through a pipeline stage
every half-clock cycle. Including the delay through the
output latch, the latency is seven clock cycles.
A 2-bit (2-comparator) flash ADC converts the held-
input voltage into a digital code. The following digital-
to-analog converter (DAC) converts the digitized result
back into an analog voltage, which is then subtracted
from the original held-input signal. The resulting error
signal is then multiplied by two and the product is
passed along to the next pipeline stage. This process
is repeated until the signal has been processed by all
12 stages. Each stage provides a 1-bit resolution.
Digital error correction compensates for ADC compara-
tor offsets in each pipeline stage and ensures no
missing codes.
12-Bit, 20Msps, 3.3V, Low-Power ADC with
Internal Reference
