MAX121CWE ,308Ksps ADC with DSP Interface and 78dB SINADGeneral Description
The MAX121 is a complete, BiCMOS, serial-output, sam-
pling 14-bit analog-t ..
MAX121CWE ,308Ksps ADC with DSP Interface and 78dB SINADFeatures
. 14-Bit Resolution
. 2.9ps Conversion Timel308ksps Throughput
. 400ns Acquisition Ti ..
MAX121CWE+ ,308ksps ADC with DSP Interface and 78dB SINADApplications TRACK/HOLDAINVSS● Digital Signal Processing3kΩ● Audio and Telecom ProcessingV -5VREFDA ..
MAX121CWE+ ,308ksps ADC with DSP Interface and 78dB SINADApplications TRACK/HOLDAINVSS● Digital Signal Processing3kΩ● Audio and Telecom ProcessingV -5VREFDA ..
MAX121CWE+T ,308ksps ADC with DSP Interface and 78dB SINADFeaturesThe MAX121 is a complete, BiCMOS, serial-output, ● 14-Bit Resolutionsampling 14-bit analog- ..
MAX121EPE ,308Ksps ADC with DSP Interface and 78dB SINADApplications
Digital Signal Processing
Audio and Telecom Processing
Speech Recognition and S ..
MAX351CPE ,Precision, Quad, SPST Analog Switches
MAX351CPE+ ,Precision, Quad, SPST Analog Switches
MAX351CSE ,Precision, Quad, SPST Analog Switches
MAX351CSE ,Precision, Quad, SPST Analog Switches
MAX351CSE+ ,Precision, Quad, SPST Analog Switches
MAX351ESE ,Precision, Quad, SPST Analog Switches
MAX121CAP-MAX121CPE-MAX121CWE-MAX121EPE-MAX121EWE-MAX121MJE
308Ksps ADC with DSP Interface and 78dB SINAD
General Description
The MAX121 is a complete, BiCMOS, serial-output, sam-
pling 14-bit analog-to-digital converter (ADC) that com-
bines an on-chip track/hold and a Ic)w-drift, low-noise,
buried-zener voltage reference with fast conversion
speed and low power consumption. The throughput rate
is as high as 308k samples per second (ksps). The
full-scale analog input range is eN.
The MAX121 utilizes the successive-approximation ar-
chitecture with a high-speed DAC to achieve both fast
conversion speeds and low-power operation. Operating
with +5V and -12V or -15V power supplies, power con-
sumption is only 210mW.
The MAX121 can be directly interfaced to the serial port of
most popular digital-signal processors, and comes in
space-saving 16-pin DIP and SO and smaller 20-pin
SSOP packages. The MAX121 operates with TTL- and
CMOS-compatible clocks in the frequency range from
0.1MHz to S5MHz, All logic inputs and outputs are TTL-
and CMOS-compatible. This data sheet includes applica-
tion notes for easy interface to TMS320, pPD77230, and
ADSP2101 digitai-signal processors, as well as pPs using
the Motorola SPI and QSPI interface standards.
Applications
Digital Signal Processing
Audio and Telecom Processing
Speech Recognition and Synthesis
DSP Servo Control
Spectrum Analysis
Functional Diagram
SAMPUNG
COMPARATOR
F BUFFER
CONTROL LOGIC EFRM
_ REFERENCE
2fllAL4llDi)CILflyl]
30tthsps ADC With lDSlP Iliniteirfaytte
and Tada SllNalD
Features
. 14-Bit Resolution
. 2.9gs Conversion Time/308ksps Throughput
. 400ns Acquisition Time
9 Low Noise and Distortion:
78dB SINAD
-85dB THD
t t-5V Bipolar Input Range, Overvoltage
Tolerant to 1151/
. 210mW Power Dissipation
. Continuous-Conversion Mode Available
. 30ppm/‘C, -5V Internal Reference
. Interfaces to DSP Processors
. 16-Pin DIP and SO Packages,
20-Pin SSOP Package
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAX121CPE 0°C to +70'C 16 Plastic DIP
MAX121CWE (YC) to +70''C 16 Wide so
MAX121CAP (YC to +70°C 20 SSOP"
i MAX121C/D (Y'C to +70''C Dice"
Ordering Information continued at end of data sheet.
. Contact factory for dice specmcanons
- 20pm SSOP IS 50% smaller than 16-pin SOIC,
Pin Configurations
TOP VIEW
Vss 1 E MODE
V00 E Ei E
AIN [E MAXIM E CLKIN
VREF E MAXIZI El co-N/FT
AGND E li] SCLK
INVCLK E jj] SDATA
INVFRM E Iii FSTRT
DGND [E 9 SFRM
DIP/SO
Pin Configurations continued at end of data sheet.
Maxim Integrated Products 1
a the latest literature: http://, .
For small orders, ext. 3468.
[(-35wi
MAINE”!
308ksps ADC wigh DSP [Interface
and Tada SHNAD
ABSOLUTE MAXIMUM RATINGS
VDD to DGND ......._.l..l._ -0.3V to +6V
Vss to DGND .......................... . +0_3V to -17V
AIN to AGND .-r-l-b.rr.Fr.m...__. t15V
AGNDtoDGND w.rrw-rw-rw-rw-re-r. w.,,_.,_a__.t03V
Diwl Inguls lo DGND ................ -0.3V (VDD + 0.3V)
(CS, CONVST, MODE, CLKIN, INVCLK, INVFRM)
Digital Outputs to DGND .............. +0.3V. (VDD + 0.3V)
(SFRM, FSTRT. SCLK, SDATA}
Stresses beyond those listed under 'Absolute Maximum Harings‘ may cause permanent damge
Continuous Power Dissipation (TA = +70'C)
16-Pin Plastic DIP (derate 10.53mW/'C above +70'C) 842mW
16-Pin Wide so (derate 9.52mW/T above +70'C) . . , 762mW
20-Pin SSOP (derate 8.00mWI'C above +70'C) ___ 640mW
16-Pin CERDIP (derate 10.00mWf'C above +70''C) . . 800mW
Operating Temperature Ranges:
MAX121C_ __..................-.. O'C to +7CI'C
MAX121E_ tF.-.................-.-. -40'C to +85'C
MAX121MIE ......................... -55''C to +125°C
Storage Temperature Range .............. -65't) 1o +160'C
Lead Temperature (soldering, 10sec) .............. +300'C
to the device. These are stress ratings only. and functional
operation of the demos at these orany other conditions beyond those indicated in the operational sections 0! the specificatrrms is not implied. Exposure to
absolute maximum rating condmons for extendedperiods may affect device "yeataility.
ELECTRICAL CHARACTERISTICS
(VDD = 4.75V to 5.25V, Vss = -lt18V to -15.r5V, MAX121C/E chK = 5.5MHz, MAX121M ftut = SMHz, TA = TMIN to TMAx. unless
otherwise noted.)
PARAMETER [SYMBOL] commons T MIN TYP MAX UNITS
DYNAMIC PERFORMANCE (MAX121C/E: is = SUBKHZ, AIN = Ith/p-p, 50kH2)
(MAX121M: fs 278kHz, AIN = 10Vp-P. 50kHz)
. . . . . . MAX121C 75 78
Signal-to-Noise Ratio SINAD Including distortion dB
MAX121E/M 73 77
. . [ . , . MAX121C/E -85 -77
Total Harmonic Distortion THD First five harmonics dB
MAX121M v83 -76
S ' F D ' R SFDR MAX121C/E 77 86 dB
- nam c an e
punous ree y l g MAX121M 76 84
ACCURACY
Resolution RES 14 Bits
Differential Nonlinearity (Note 1) DNL 12 bits no missing codes over temp. range $1.5 LSB
integral Nonlinearity INL t2 LSB
. Code 00..00 to 00.01 transition. near AIN = ov t10 mV
Bipolar Zero Error .
Temperature drift Il ppmfC
Full-ScaleError(Notes1,2) t/rie,die-"tgylra1'ustediorb''ola"ero tOd %
Full-Scale Temperature Drift Excluding reference tl ppme
VDD only, 5V I-5% tl/2 t2
Power-Supply Rejection Vss only, -12V i10% i1 i2 LSB
l/SS only, v15V erx Il 12 r
ANALOG INPUT
Input Range -5 +5 V
InputCurrent AIN = 5V (Hm approximately 6ld2 to REF) 2.5 mA
Input Capacitance (Note 3) 10 pF
Full-Power Bandwidth 1.5 MHz
