Rainbow Electronics MAX1208 User Manual
General Description
The MAX1208 is a 3.3V, 12-bit, 80Msps analog-to-digital
converter (ADC) featuring a fully differential wideband
track-and-hold (T/H) input amplifier, driving a low-noise
internal quantizer. The analog input stage accepts singleended or differential signals. The MAX1208 is optimized
for low power, small size, and high dynamic performance
in baseband applications.
Powered from a single 3.0V to 3.6V supply, the
MAX1208 consumes only 373mW while delivering a
typical signal-to-noise (SNR) performance of 68.2dB at
an input frequency of 32.5MHz. In addition to low operating power, the MAX1208 features a 3µW power-down
mode to conserve power during idle periods.
A flexible reference structure allows the MAX1208 to use
the internal 2.048V bandgap reference or accept an
externally applied reference. The reference structure
allows the full-scale analog input range to be adjusted
from ±0.35V to ±1.15V. The MAX1208 provides a common-mode reference to simplify design and reduce external component count in differential analog input circuits.
The MAX1208 supports both a single-ended and differential input clock drive. Wide variations in the clock
duty cycle are compensated with the ADC’s internal
duty-cycle equalizer (DCE).
ADC conversion results are available through a 12-bit,
parallel, CMOS-compatible output bus. The digital output format is pin selectable to be either two’s complement or Gray code. A data-valid indicator eliminates
external components that are normally required for reliable digital interfacing. A separate digital power input
accepts a wide 1.7V to 3.6V supply, allowing the
MAX1208 to interface with various logic levels.
The MAX1208 is available in a 6mm x 6mm x 0.8mm,
40-pin thin QFN package with exposed paddle (EP),
and is specified for the extended industrial (-40°C to
+85°C) temperature range.
See the Pin-Compatible Versions table for a complete
family of 14-bit and 12-bit high-speed ADCs.
Applications
Communication Receivers
Cellular, Point-to-Point Microwave, HFC, WLAN
Ultrasound and Medical Imaging
Portable Instrumentation
Low-Power Data Acquisition
Features
♦ Excellent Dynamic Performance
68.2dB/68.0dB SNR at fIN= 3MHz/70MHz
89.3dBc/85.1dBc SFDR at fIN= 3MHz/70MHz
♦ 3.3V Low-Power Operation
373mW (Single-Ended Clock Mode)
399mW (Differential Clock Mode)
3µW (Power-Down Mode)
♦ Differential or Single-Ended Clock
♦ Fully Differential or Single-Ended Analog Input
♦ Adjustable Full-Scale Analog Input Range: ±0.35V
to ±1.15V
♦ Common-Mode Reference
♦ CMOS-Compatible Outputs in Two’s Complement
or Gray Code
♦ Data-Valid Indicator Simplifies Digital Design
♦ Data Out-of-Range Indicator
♦ Miniature, 40-Pin Thin QFN Package with Exposed
Paddle
♦ Evaluation Kit Available (Order MAX1211EVKIT)
MAX1208
12-Bit, 80Msps, 3.3V ADC
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-1002; Rev 0; 8/04
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.
EVALUATION KIT
AVAILABLE
PART
PINPACKAGE
PKG
CODE
MAX1208ETL
40 Thin QFN
(6mm x 6mm x
0.8mm)
T4066-3
Pin-Compatible Versions
PART
SAMPLING
RESOLUTION
(BITS)
TARGET
APPLICATION
MAX12553
65 14
IF/Baseband
MAX1209
80 12 IF
MAX1211
65 12 IF
MAX1208
80 12 Baseband
MAX1207
65 12 Baseband
MAX1206
40 12 Baseband
Pin Configuration appears at end of data sheet.
TEMP RANGE
-40°C to +85°C
RATE (Msps)
MAX1208
12-Bit, 80Msps, 3.3V ADC
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V
IN
= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,
G/
T = low, f
CLK
= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +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.
VDDto GND...........................................................-0.3V to +3.6V
OV
DD
to GND........-0.3V to the lower of (VDD+ 0.3V) and +3.6V
INP, INN to GND ...-0.3V to the lower of (V
DD
+ 0.3V) and +3.6V
REFIN, REFOUT, REFP, REFN,
COM to GND......-0.3V to the lower of (V
DD
+ 0.3V) and +3.6V
CLKP, CLKN, CLKTYP, G/T, DCE,
PD to GND ........-0.3V to the lower of (V
DD
+ 0.3V) and +3.6V
D11 Through D0 I.C., DAV, DOR to GND ...-0.3V to (OV
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
40-Pin Thin QFN 6mm x 6mm x 0.8mm
(derated 26.3mW/°C above +70°C)........................2105.3mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering 10s) ..................................+300°C
PARAMETER
CONDITIONS
UNITS
DC ACCURACY (Note 2)
Resolution 12 Bits
Integral Nonlinearity INL fIN = 20MHz
LSB
Differential Nonlinearity DNL
f
IN
= 20MHz, no missing codes over
temperature
LSB
Offset Error V
REFIN
= 2.048V
%FS
Gain Error V
REFIN
= 2.048V
%FS
ANALOG INPUT (INP, INN)
Differential Input Voltage Range V
DIFF
Differential or single-ended inputs
V
Common-Mode Input Voltage
V
C
PAR
Fixed capacitance to ground 2
Input Capacitance
(Figure 3)
Switched capacitance 1.9
pF
CONVERSION RATE
Maximum Clock Frequency f
CLK
80
MHz
Minimum Clock Frequency 5
MHz
Data Latency Figure 6 8.5
Clock
cycles
DYNAMIC CHARACTERISTICS (differential inputs, Note 2)
Small-Signal Noise Floor SSNF Input at less than -35dBFS
dBFS
fIN = 3MHz at -0.5dBFS 68.2
fIN = 32.5MHz at -0.5dBFS
68.2Signal-to-Noise Ratio SNR
f
IN
= 70MHz at -0.5dBFS 68.0
dB
fIN = 3MHz at -0.5dBFS 68.1
fIN = 32.5MHz at -0.5dBFS
68.1
Signal-to-Noise and Distortion SINAD
f
IN
= 70MHz at -0.5dBFS 67.8
dB
SYMBOL
MIN TYP MAX
±0.65
-0.83 ±0.35
±0.25 ±0.92
±1.0 ±5.6
±1.024
V
/ 2
C
SAMPLE
65.4
65.2
DD
-68.8
MAX1208
12-Bit, 80Msps, 3.3V ADC
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V
IN
= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,
G/T = low, f
CLK
= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
fIN = 3MHz at -0.5dBFS 89.3
fIN = 32.5MHz at -0.5dBFS
88.2
Spurious-Free Dynamic Range SFDR
fIN = 70MHz at -0.5dBFS 85.1
dBc
fIN = 3MHz at -0.5dBFS
fIN = 32.5MHz at -0.5dBFS
Total Harmonic Distortion THD
fIN = 70MHz at -0.5dBFS
dBc
fIN = 3MHz at -0.5dBFS -93
fIN = 32.5MHz at -0.5dBFS -89Second Harmonic HD2
fIN = 70MHz at -0.5dBFS
dBc
fIN = 3MHz at -0.5dBFS
fIN = 32.5MHz at -0.5dBFS
Third Harmonic HD3
fIN = 70MHz at -0.5dBFS
dBc
Intermodulation Distortion IMD
fIN1 = 68.5MHz at -7dBFS
fIN2 = 71.5MHz at -7dBFS
dBc
Third-Order Intermodulation IM3
fIN1 = 68.5MHz at -7dBFS
fIN2 = 71.5MHz at -7dBFS
dBc
Two-Tone Spurious-Free
Dynamic Range
fIN1 = 68.5MHz at -7dBFS
fIN2 = 71.5MHz at -7dBFS
85.4 dBc
Aperture Delay tAD Figure 4 0.9 ns
Aperture Jitter tAJ Figure 4 <0.2
psRMS
Output Noise nOUT INP = INN = COM 0.52
LSBRM
Overdrive Recovery Time ±10% beyond full scale 1
Clock
cycles
INTERNAL REFERENCE (REFIN = REFOUT; VREFP, VREFN, and VCOM are generated internally)
REFOUT Output Voltage
V
COM Output Voltage VCOM VDD / 2 1.65 V
Differential Reference Output
VREF VREF = VREFP - VREFN
V
REFOUT Load Regulation 35
mV/mA
REFOUT Temperature Coefficient
TCREF +50
ppm/°C
Short to VDD—sinking 0.24
REFOUT Short-Circuit Current
Short to GND—sourcing 2.1
mA
BUFFERED EXTERNAL REFERENCE (REFIN driven externally; VREFIN = 2.048V, VREFP, VREFN, and VCOM are generated
internally)
REFIN Input Voltage
V
REFP Output Voltage VREFP (VDD/2) + (VREFIN / 4)
V
SFDRTT
VREFOUT 1.978 2.048 2.079
VREFIN 2.048
78.7
-87.1
-85.0 -77.2
-81.2
-86.5
-96.8
-95.1
-85.1
-81.1
-84.4
1.024
2.162
MAX1208
12-Bit, 80Msps, 3.3V ADC
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V
IN
= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,
G/T = low, f
CLK
= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
REFN Output Voltage V
REFN
(V
DD
/ 2) - (V
REFIN
/ 4)
V
COM Output Voltage V
COM
V
DD
/ 2
V
Differential Reference Output
Voltage
V
REF
V
REF
= V
REFP
- V
REFN
V
Differential Reference
Temperature Coefficient
ppm/°C
REFIN Input Resistance
MΩ
UNBUFFERED EXTERNAL REFERENCE (REFIN = GND; V
REFP
, V
REFN
, and V
COM
are applied externally)
COM Input Voltage V
COM
V
DD
/ 2
V
REFP Input Voltage V
REFP
- V
COM
V
REFN Input Voltage V
REFN
- V
COM
V
Differential Reference Input
Voltage
V
REF
V
REF
= V
REFP
- V
REFN
V
REFP Sink Current I
REFP
V
REFP
= 2.162V 1.1 mA
REFN Source Current I
REFN
V
REFN
= 1.138V 1.1 mA
COM Sink Current I
COM
0.3 mA
REFP, REFN Capacitance 13 pF
COM Capacitance 6pF
CLOCK INPUTS (CLKP, CLKN)
Single-Ended Input High
Threshold
V
IH
CLKTYP = GND, CLKN = GND
0.8 x
V
Single-Ended Input Low
Threshold
V
IL
CLKTYP = GND, CLKN = GND
0.2 x
V
Differential Input Voltage Swing CLKTYP = high 1.4
V
P-P
Differential Input Common-Mode
Voltage
CLKTYP = high
V
Input Resistance R
CLK
Figure 5 5 kΩ
Input Capacitance C
CLK
2pF
DIGITAL INPUTS (CLKTYP, G/T, PD)
Input High Threshold V
IH
0.8 x
V
1.138
1.60 1.65 1.70
0.969 1.024 1.069
±25
>50
1.65
0.512
-0.512
1.024
V
DD
DD
/ 2
V
OV
DD
V
DD
MAX1208
12-Bit, 80Msps, 3.3V ADC
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V
IN
= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,
G/T = low, f
CLK
= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Low Threshold V
IL
0.2 x
V
VIH = OV
DD
±5
Input Leakage Current
V
IL
= 0 ±5
µA
Input Capacitance C
DIN
5pF
DIGITAL OUTPUTS (D11–D0, DAV, DOR)
D11–D0, DOR, I
SINK
= 200µA 0.2
Output Voltage Low V
OL
DAV, I
SINK
= 600µA 0.2
V
D11–D0, DOR, I
SOURCE
= 200µA
0.2
Output Voltage High V
OH
DAV, I
SOURCE
= 600µA
OV
DD
-
0.2
V
Tri-State Leakage Current I
LEAK
(Note 3) ±5 µA
D11–D0, DOR Tri-State Output
Capacitance
C
OUT
(Note 3) 3 pF
DAV Tri-State Output
Capacitance
C
DAV
(Note 3) 6 pF
POWER REQUIREMENTS
Analog Supply Voltage V
DD
3.0 3.3 3.6 V
Digital Output Supply Voltage OV
DD
1.7 2.0
V
Normal operating mode,
f
IN
= 32.5MHz at -0.5dBFS,
CLKTYP = GND, single-ended clock
Normal operating mode,
f
IN
= 32.5MHz at -0.5dBFS,
CLKTYP = OV
DD,
differential clock
Analog Supply Current I
VDD
Power-down mode clock idle, PD = OV
DD
mA
Normal operating mode,
f
IN
= 32.5MHz at -0.5dBFS,
CLKTYP = GND, single-ended clock
Normal operating mode,
f
IN
= 32.5MHz at -0.5dBFS,
CLKTYP = OV
DD
, differential clock
Analog Power Dissipation P
DISS
Power-down mode clock idle, PD = OV
DD
mW
OVDD -
113
121 132.2
0.001
373
399 436.3
0.003
OV
VDD +
0.3V
DD
MAX1208
12-Bit, 80Msps, 3.3V ADC
6 _______________________________________________________________________________________
Note 1: Specifications ≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.
Note 2: See definitions in the Parameter Definitions section.
Note 3: During power-down, D11–D0, DOR, and DAV are high impedance.
Note 4: Guaranteed by design and characterization.
Note 5: Digital outputs settle to V
IH
or VIL.
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V
IN
= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,
G/T = low, f
CLK
= 80MHz (50% duty cycle), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Normal operating mode,
f
IN
= 32.5MHz at -0.5dBFS, OVDD = 2.0V,
C
L
≈ 5pF
9.9 mA
Digital Output Supply Current I
OVDD
Power-down mode clock idle, PD = OV
DD
0.9 µA
TIMING CHARACTERISTICS (Figure 6)
Clock Pulse Width High t
CH
ns
Clock Pulse Width Low t
CL
ns
Data-Valid Delay t
DAV
CL = 5pF (Note 5) 6.4 ns
Data Setup Time Before Rising
Edge of DAV
t
SETUP
CL = 5pF (Note 4, Note 5) 7.7 ns
Data Hold Time After Rising Edge
of DAV
t
HOLD
CL = 5pF (Note 4, Note 5) 4.2 ns
Wake-Up Time from Power-Down
t
WAKE
V
REFIN
= 2.048V 10 ms
6.25
6.25
MAX1208
12-Bit, 80Msps, 3.3V ADC
_______________________________________________________________________________________ 7
SINGLE-TONE FFT PLOT
(8192-POINT DATA RECORD)
MAX1208 toc01
FREQUENCY (MHz)
AMPLITUDE (dBFS)
363224 2881216204
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-110
040
f
CLK
= 80.00353MHz
f
IN
= 2.99817879MHz
AIN = -0.527dBFS
SNR = 68.100dB
SINAD = 68.061dB
THD = -88.539dBc
SFDR = 90.612dBc
HD3
HD2
SINGLE-TONE FFT PLOT
(8192-POINT DATA RECORD)
MAX1208 toc02
FREQUENCY (MHz)
AMPLITUDE (dBFS)
363224 2881216204
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-110
040
f
CLK
= 80.00353MHz
f
IN
= 32.49166395MHz
A
IN
= -0.495dBFS
SNR = 68.236dB
SINAD = 68.173dB
THD = -86.624dBc
SFDR = 89.446dBc
HD3
HD2
SINGLE-TONE FFT PLOT
(8192-POINT DATA RECORD)
MAX1208 toc03
FREQUENCY (MHz)
AMPLITUDE (dBFS)
363224 2881216204
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-110
040
f
CLK
= 80.00353MHz
f
IN
= 69.99331395MHz
A
IN
= -0.510dBFS
SNR = 68.011dB
SINAD = 67.819dB
THD = -81.470dBc
SFDR = 85.617dBc
HD3
HD2
HD4
SINGLE-TONE FFT PLOT
(16,384-POINT DATA RECORD)
MAX1208 toc04
FREQUENCY (MHz)
AMPLITUDE (dBFS)
363224 2881216204
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-110
040
f
CLK
= 80MHz
f
IN1
= 43.90137MHz
A
IN1
= -7.010dBFS
f
IN2
= 45.90332MHz
A
IN2
= -7.041dBFS
SFDR
TT
= 87.239dBc
IMD = -85.288dBc
IM3 = -87.415dBc
f
IN1
f
IN2
2 x f
IN1
+ f
IN2
SINGLE-TONE FFT PLOT
(16,384-POINT DATA RECORD)
MAX1208 toc05
FREQUENCY (MHz)
AMPLITUDE (dBFS)
363224 2881216204
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-110
040
f
CLK
= 80MHz
f
IN1
= 68.50098MHz
A
IN1
= -7.043dBFS
f
IN2
= 71.499MHz
A
IN2
= -7.041dBFS
IMD = -80.988dBc
IM3 = -84.424dBc
f
IN1
f
IN2
2 x f
IN1
+ f
IN2
f
IN1
+ 2 x f
IN2
f
IN1
+ f
IN2
INTEGRAL NONLINEARITY
MAX1208 toc06
DIGITAL OUTPUT CODE
INL (LSB)
358430722048 25601024 1536512
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
04096
DIFFERENTIAL NONLINEARITY
MAX1208 toc07
DIGITAL OUTPUT CODE
DNL (LSB)
358430722048 25601024 1536512
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
04096
Typical Operating Characteristics
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V
IN
= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,
G/T = low, f
CLK
= 80MHz (50% duty cycle), TA = +25°C, unless otherwise noted.)
MAX1208
12-Bit, 80Msps, 3.3V ADC
8 _______________________________________________________________________________________
SNR, SINAD
vs. SAMPLING RATE
MAX1208 toc08
f
CLK
(MHz)
SNR, SINAD (dB)
806020 40
63
64
65
66
67
68
69
70
62
0100
fIN ≈ 32.5MHz
SNR
SINAD
SFDR, -THD
vs. SAMPLING RATE
MAX1208 toc09
f
CLK
(MHz)
SFDR, -THD (dBc)
806020 40
65
70
75
80
85
90
95
100
60
0 100
fIN ≈ 32.5MHz
SFDR
-THD
POWER DISSIPATION
vs. SAMPLING RATE
MAX1208 toc10
f
CLK
(MHz)
POWEER DISSIPATION (mW)
806020 40
250
300
350
400
450
500
200
0100
DIFFERENTIAL CLOCK
f
IN
≈ 32.5MHz
C
L
≈ 5pF
ANALOG + DIGITAL POWER
ANALOG POWER
SNR, SINAD
vs. SAMPLING RATE
MAX1208 toc11
f
CLK
(MHz)
SNR, SINAD (dB)
806020 40
63
64
65
66
67
68
69
70
62
0100
fIN ≈ 70MHz
SNR
SINAD
SFDR, -THD
vs. SAMPLING RATE
MAX1208 toc12
f
CLK
(MHz)
SFDR, -THD (dBc)
806020 40
65
70
75
80
85
90
95
100
60
0 100
fIN ≈ 70MHz
SFDR
-THD
POWER DISSIPATION
vs. SAMPLING RATE
MAX1208 toc13
f
CLK
(MHz)
POWEER DISSIPATION (mW)
806020 40
250
300
350
400
450
200
0120100
DIFFERENTIAL CLOCK
f
IN
≈ 70MHz
C
L
≈ 5pF
ANALOG + DIGITAL POWER
ANALOG POWER
SNR, SINAD
vs. ANALOG INPUT FREQUENCY
MAX1208 toc14
ANALOG INPUT FREQUENCY (MHz)
SNR, SINAD (dB)
100755025
61
62
63
64
65
66
67
68
69
70
60
0125
f
CLK
≈ 80MHz
SNR
SINAD
SFDR, -THD
vs. ANALOG INPUT FREQUENCY
MAX1208 toc15
ANALOG INPUT FREQUENCY (MHz)
SFDR, -THD (dBc)
100755025
75
80
85
90
95
70
0125
f
CLK
≈ 80MHz
SFDR
-THD
POWER DISSIPATION
vs. ANALOG INPUT FREQUENCY
MAX1208 toc16
ANALOG INPUT FREQUENCY (MHz)
POWER DISSIPATION (mW)
100755025
350
400
450
500
300
0125
ANALOG + DIGITAL POWER
ANALOG POWER
DIFFERENTIAL CLOCK
f
CLK
≈ 80MHz
C
L
= 5pF
Typical Operating Characteristics (continued)
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V
IN
= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,
G/T = low, f
CLK
= 80MHz (50% duty cycle), TA = +25°C, unless otherwise noted.)
MAX1208
12-Bit, 80Msps, 3.3V ADC
_______________________________________________________________________________________ 9
SNR, SINAD
vs. ANALOG INPUT AMPLITUDE
MAX1208 toc17
ANALOG INPUT AMPLITUDE (dBFS)
SNR, SINAD (dB)
-5-10-20 -15-30 -25-35
30
35
40
45
50
55
60
65
70
75
25
-40 0
f
CLK
= 80.003702MHz
f
IN
= 32.125257MHz
SNR
SINAD
SFDR, -THD
vs. ANALOG INPUT AMPLITUDE
MAX1208 toc18
ANALOG INPUT AMPLITUDE (dBFS)
SFDR, -THD (dBc)
-5-10-20 -15-30 -25-35
45
50
55
60
65
70
75
80
85
90
40
-40 0
f
CLK
= 80.003702MHz
f
IN
= 32.125257MHz
SFDR
-THD
POWER DISSIPATION
vs. ANALOG INPUT AMPLITUDE
MAX1208 toc19
ANALOG INPUT AMPLITUDE (dBFS)
POWER DISSIPATION (mW)
-5-10-20 -15-30 -25-35
350
400
450
500
300
-40 0
DIFFERENTIAL CLOCK
f
CLK
= 80.003702MHz
f
IN
= 32.125257MHz
C
L
≈ 5pF
ANALOG + DIGITAL POWER
ANALOG POWER
SNR, SINAD
vs. ANALOG POWER-INPUT VOLTAGE
MAX1208 toc20
VDD (V)
SNR, SINAD (dB)
3.43.23.02.8
61
62
63
64
65
66
67
68
69
70
60
2.6 3.6
f
CLK
= 80.03584MHz
f
IN
= 32.11399MHz
SNR
SINAD
SFDR, -THD
vs. ANALOG POWER-INPUT VOLTAGE
MAX1208 toc21
VDD (V)
SFDR, -THD (dBc)
3.43.23.02.8
65
70
75
80
85
90
95
100
60
2.6 3.6
f
CLK
= 80.03584MHz
f
IN
= 32.11399MHz
SFDR
-THD
POWER DISSIPATION
vs. ANALOG POWER-INPUT VOLTAGE
MAX1208 toc22
VDD (V)
POWER DISSIPATION (mW)
3.43.23.02.8
250
300
350
400
450
500
550
200
2.6 3.6
DIFFERENTIAL CLOCK
f
CLK
= 80.03584MHz
f
IN
= 32.11399MHz
C
L
≈
5pF
ANALOG + DIGITAL POWER
ANALOG POWER
SNR, SINAD
vs. OUTPUT-DRIVER POWER-INPUT VOLTAGE
MAX1208 toc23
OVDD (V)
SNR, SINAD (dB)
3.43.02.62.21.8
61
62
63
64
65
66
67
68
69
70
60
1.4 3.8
f
CLK
= 80.03584MHz
f
IN
= 32.11399MHz
SNR
SINAD
SFDR, -THD
vs. OUTPUT-DRIVER POWER-INPUT VOLTAGE
MAX1208 toc24
OVDD (V)
SFDR, -THD (dBc)
3.43.02.62.21.8
65
70
75
80
85
90
95
100
60
1.4 3.8
f
CLK
= 80.03584MHz
f
IN
= 32.11399MHz
SFDR
-THD
POWER DISSIPATION
vs. OUTPUT-DRIVER POWER-INPUT VOLTAGE
MAX1208 toc25
OVDD (V)
SFDR, -THD (dBc)
3.43.02.62.21.8
250
225
300
350
400
450
500
550
200
1.4 3.8
DIFFERENTIAL CLOCK
f
CLK
= 80.03584MHz
f
IN
= 32.11399MHz
C
L
≈ 5pF
ANALOG + DIGITAL POWER
ANALOG POWER
Typical Operating Characteristics (continued)
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), V
IN
= -0.5dBFS, CLKTYP = high, DCE = high, PD = low,
G/T = low, f
CLK
= 80MHz (50% duty cycle), TA = +25°C, unless otherwise noted.)
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