LTM9011-14/
LTM9010-14/LTM9009-14
14-Bit, 125Msps/105Msps/
80Msps Low Power Octal ADCs
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
DESCRIPTION
8-Channel Simultaneous Sampling ADC
73.1dB SNR
88dB SFDR
Low Power: 140mW/113mW/94mW per Channel
Single 1.8V Supply
Serial LVDS Outputs: 1 or 2 Bits per Channel
Selectable Input Ranges: 1VP-P to 2VP-P
800MHz Full Power Bandwidth S/H
Shutdown and Nap Modes
Serial SPI Port for Configuration
Internal Bypass Capacitance, No External
Components
140-Pin (11.25mm × 9mm) BGA Package
The LTM®9011-14/LTM9010-14/LTM9009-14 are 8-channel, simultaneous sampling 14-bit A/D converters designed
for digitizing high frequency, wide dynamic range signals.
AC performance includes 73.1dB SNR and 88dB spurious
free dynamic range (SFDR). Low power consumption per
channel reduces heat in high channel count applications.
Integrated bypass capacitance and flow-through pinout
reduces overall board space requirements.
DC specs include ±1LSB INL (typ), ±0.3LSB DNL (typ)
and no missing codes over temperature. The transition
noise is a low 1.2LSBRMS.
The digital outputs are serial LVDS to minimize the number of data lines. Each channel outputs two bits at a time
(2-lane mode). At lower sampling rates there is a one bit
per channel option (1-lane mode).
APPLICATIONS
n
n
n
n
n
n
Communications
Cellular Base Stations
Software Defined Radios
Portable Medical Imaging
Multichannel Data Acquisition
Nondestructive Testing
The ENC+ and ENC– inputs may be driven differentially
or single-ended with a sine wave, PECL, LVDS, TTL, or
CMOS inputs. An internal clock duty cycle stabilizer allows high performance at full speed for a wide range of
clock duty cycles.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
1.8V
VDD
OUT1A
0
OUT1B
–10
14-BIT
ADC CORE
OUT2A
S/H
ENCODE
INPUT
•••
DATA
SERIALIZER
–30
OUT2B
•••
S/H
SERIALIZED
LVDS
OUTPUTS
OUT8A
14-BIT
ADC CORE
OUT8B
DATA
CLOCK
OUT
PLL
FRAME
GND
GND
AMPLITUDE (dBFS)
CHANNEL 8
ANALOG
INPUT
14-BIT
ADC CORE
–20
•••
CHANNEL 2
ANALOG
INPUT
S/H
•••
CHANNEL 1
ANALOG
INPUT
LTM9011-14, 125Msps,
2-Tone FFT, fIN = 70MHz and 75MHz
1.8V
OVDD
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
10
20
30
40
FREQUENCY (MHz)
50
60
9009101114 TA01b
9009101114 TA01
Rev D
Document Feedback
For more information www.analog.com
1
LTM9011-14/
LTM9010-14/LTM9009-14
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Notes 1, 2)
Supply Voltages
VDD, OVDD................................................ –0.3V to 2V
Analog Input Voltage (AIN+, AIN –,
PAR/SER, SENSE) (Note 3) .......... –0.3V to (VDD + 0.2V)
Digital Input Voltage (ENC+, ENC–, CS,
SDI, SCK) (Note 4) .................................... –0.3V to 3.9V
SDO (Note 4)............................................. –0.3V to 3.9V
Digital Output Voltage ................ –0.3V to (OVDD + 0.3V)
Operating Temperature Range
LTM9011C, LTM9010C, LTM9009C ......... 0°C to 70°C
LTM9011I, LTM9010I, LTM9009I .........–40°C to 85°C
Storage Temperature Range .................. –55°C to 125°C
TOP VIEW
A
B
C
D
E
F
G
H
J
K
L
M
N
P
1
2
3
4
5
6
7
8
9
10
BGA PACKAGE
140-LEAD (11.25mm × 9.00mm × 2.72mm)
TJMAX = 150°C, θJA = 30°C/W, θJC = 25°C/W, θJB = 15°C/W, θJCbottom = 12°C/W
ORDER INFORMATION
http://www.linear.com/product/LTM9011-14#orderinfo
LEAD FREE FINISH
TRAY
PART MARKING*
PACKAGE DESCRIPTION
LTM9011CY-14#PBF
LTM9011CY-14#PBF
LTM9011Y14
140-Lead (11.25mm × 9mm × 2.72mm) BGA 0°C to 70°C
TEMPERATURE RANGE
LTM9011IY-14#PBF
LTM9011IY-14#PBF
LTM9011Y14
140-Lead (11.25mm × 9mm × 2.72mm) BGA –40°C to 85°C
LTM9010CY-14#PBF
LTM9010CY-14#PBF
LTM9010Y14
140-Lead (11.25mm × 9mm × 2.72mm) BGA 0°C to 70°C
LTM9010IY-14#PBF
LTM9010IY-14#PBF
LTM9010Y14
140-Lead (11.25mm × 9mm × 2.72mm) BGA –40°C to 85°C
LTM9009CY-14#PBF
LTM9009CY-14#PBF
LTM9009Y14
140-Lead (11.25mm × 9mm × 2.72mm) BGA 0°C to 70°C
LTM9009IY-14#PBF
LTM9009IY-14#PBF
LTM9009Y14
140-Lead (11.25mm × 9mm × 2.72mm) BGA –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
Rev D
2
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
CONVERTER CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 5)
LTM9011-14
PARAMETER
CONDITIONS
Resolution (No Missing Codes)
MIN
l
LTM9010-14
TYP
MAX
MIN
14
LTM9009-14
TYP
MAX
MIN
14
TYP
MAX
UNITS
14
Bits
Integral Linearity Error
Differential Analog Input (Note 6) l
–4.1
±1.2
4.1
–3.25
±1
3.25
–2.75
±1
2.75
LSB
Differential Linearity Error
Differential Analog Input
l
–0.9
±0.3
0.9
–0.8
±0.3
0.8
–0.8
±0.3
0.8
LSB
Offset Error
(Note 7)
l
–12
±3
12
–12
±3
12
–12
±3
12
mV
Gain Error
Internal Reference
External Reference
–2.6
–1.3
–1.3
–2.6
–1.3
–1.3
–2.6
–1.3
–1.3
0
%FS
%FS
l
Offset Drift
0
0
±20
±20
±20
µV/°C
Full-Scale Drift
Internal Reference
External Reference
±35
±25
±35
±25
±35
±25
ppm/°C
ppm/°C
Gain Matching
External Reference
±0.2
±0.2
±0.2
%FS
±3
±3
±3
mV
External Reference
1.2
1.2
1.2
LSBRMS
Offset Matching
Transition Noise
ANALOG INPUT
The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at TA = 25°C. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN(CM)
Analog Input Range (AIN+ – AIN–)
Analog Input Common Mode (AIN+ + AIN–)/2
VSENSE
External Voltage Reference Applied to SENSE External Reference Mode
IINCM
Analog Input Common Mode Current
Per Pin, 125Msps
Per Pin, 105Msps
Per Pin, 80Msps
IIN1
Analog Input Leakage Current
0 < AIN+, AIN– < VDD, No Encode
l
–1
1
µA
IIN2
PAR/SER Input Leakage Current
0 < PAR/SER < VDD
l
–3
3
µA
IIN3
SENSE Input Leakage Current
0.625 < SENSE < 1.3V
l
–6
6
µA
tAP
Sample-and-Hold Acquisition Delay Time
0
tJITTER
Sample-and-Hold Acquisition Delay Jitter
0.15
CMRR
Analog Input Common Mode Rejection Ratio
BW-3B
Full-Power Bandwidth
VIN
1.7V < VDD < 1.9V
l
Differential Analog Input (Note 8)
l
VCM – 100mV
1 to 2
VCM
VCM + 100mV
VP-P
V
l
0.625
1.250
1.300
V
155
130
100
Figure 6 Test Circuit
µA
µA
µA
ns
psRMS
80
dB
800
MHz
Rev D
For more information www.analog.com
3
LTM9011-14/
LTM9010-14/LTM9009-14
DYNAMIC ACCURACY
The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 5)
LTM9011-14
SYMBOL
PARAMETER
CONDITIONS
SNR
Signal-to-Noise Ratio
5MHz Input
70MHz Input
140MHz Input
SFDR
S/(N+D)
MAX
LTM9010-14
MAX
LTM9009-14
MIN
TYP
MIN
TYP
MIN
TYP
l
70.8
73.1
73
72.6
70.6
73
72.9
72.6
69.7
73
72.9
72.5
MAX
UNITS
dBFS
dBFS
dBFS
Spurious Free Dynamic Range 5MHz Input
2nd or 3rd Harmonic
70MHz Input
140MHz Input
l
69
88
85
82
71
88
85
82
74
88
85
82
dBFS
dBFS
dBFS
Spurious Free Dynamic Range 5MHz Input
4th Harmonic or Higher
70MHz Input
140MHz Input
l
81
90
90
90
81
90
90
90
82
90
90
90
dBFS
dBFS
dBFS
l
68.4
73
72.6
72
69.7
73
72.6
72
69.6
72.9
72.6
72
dBFS
dBFS
dBFS
Signal-to-Noise Plus
Distortion Ratio
5MHz Input
70MHz Input
140MHz Input
Crosstalk, Near Channel
10MHz Input (Note 12)
–90
–90
–90
dBc
Crosstalk, Far Channel
10MHz Input (Note 12)
–105
–105
–105
dBc
INTERNAL REFERENCE CHARACTERISTICS
The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 5)
PARAMETER
CONDITIONS
VCM Output Voltage
IOUT = 0
MIN
TYP
MAX
0.5 • VDD – 25mV
0.5 • VDD
0.5 • VDD + 25mV
VCM Output Temperature Drift
±25
VCM Output Resistance
–600µA < IOUT < 1mA
VREF Output Voltage
IOUT = 0
VREF Output Temperature Drift
1.250
±25
VREF Output Resistance
–400µA < IOUT < 1mA
VREF Line Regulation
1.7V < VDD < 1.9V
7
0.6
V
ppm/°C
4
1.225
UNITS
Ω
1.275
V
ppm/°C
Ω
mV/V
Rev D
4
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
DIGITAL INPUTS AND OUTPUTS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ENCODE INPUTS (ENC+, ENC– )
Differential Encode Mode (ENC– Not Tied to GND)
VID
Differential Input Voltage
(Note 8)
l
0.2
VICM
Common Mode Input Voltage
Internally Set
Externally Set (Note 8)
l
1.1
l
0.2
VIN
Input Voltage Range
ENC+, ENC– to GND
RIN
Input Resistance
(See Figure 10)
CIN
Input Capacitance
V
1.2
1.6
V
V
3.6
V
10
kΩ
3.5
pF
Single-Ended Encode Mode (ENC– Tied to GND)
VIH
High Level Input Voltage
VDD = 1.8V
l
VIL
Low Level Input Voltage
VDD = 1.8V
l
VIN
Input Voltage Range
ENC+ to GND
l
RIN
Input Resistance
(See Figure 11)
CIN
Input Capacitance
1.2
V
0.6
0
3.6
V
V
30
kΩ
3.5
pF
DIGITAL INPUTS (CS, SDI, SCK in Serial or Parallel Programming Mode. SDO in Parallel Programming Mode)
VIH
High Level Input Voltage
VDD = 1.8V
l
VIL
Low Level Input Voltage
VDD = 1.8V
l
IIN
Input Current
VIN = 0V to 3.6V
l
CIN
Input Capacitance
1.3
V
–10
0.6
V
10
µA
3
pF
200
Ω
SDO OUTPUT (Serial Programming Mode. Open-Drain Output. Requires 2kΩ Pull-Up Resistor if SDO Is Used)
ROL
Logic Low Output Resistance to GND
VDD = 1.8V, SDO = 0V
IOH
Logic High Output Leakage Current
SDO = 0V to 3.6V
COUT
Output Capacitance
l
–10
10
3
µA
pF
DIGITAL DATA OUTPUTS
VOD
Differential Output Voltage
100Ω Differential Load, 3.5mA Mode
100Ω Differential Load, 1.75mA Mode
l
l
247
125
350
175
454
250
VOS
Common Mode Output Voltage
100Ω Differential Load, 3.5mA Mode
100Ω Differential Load, 1.75mA Mode
l
l
1.125
1.125
1.250
1.250
1.375
1.375
RTERM
On-Chip Termination Resistance
Termination Enabled, OVDD = 1.8V
100
mV
mV
V
V
Ω
Rev D
For more information www.analog.com
5
LTM9011-14/
LTM9010-14/LTM9009-14
POWER REQUIREMENTS
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. (Note 9)
LTM9011-14
SYMBOL PARAMETER
LTM9009-14
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
(Note 10)
l
1.7
1.8
1.9
1.7
1.8
1.9
1.7
1.8
Output Supply Voltage
(Note 10)
l
1.7
1.8
1.9
1.7
1.8
1.9
1.7
1.8
1.9
V
Analog Supply Current
Sine Wave Input
l
582
632
476
508
395
450
mA
IOVDD
Digital Supply Current
2-Lane Mode, 1.75mA Mode
2-Lane Mode, 3.5mA Mode
l
l
54
98
62
108
52
96
62
106
50
94
58
104
mA
mA
PDISS
Power Dissipation
2-Lane Mode, 1.75mA Mode
2-Lane Mode, 3.5mA Mode
l
l
1145
1224
1249
1332
950
1030
1026
1105
801
880
914
997
mW
mW
PSLEEP
Sleep Mode Power
2
2
2
mW
PNAP
Nap Mode Power
170
170
170
mW
PDIFFCLK
Power Decrease With Single-Ended Encode Mode Enabled
(No Decrease for Sleep Mode)
40
40
40
mW
VDD
Analog Supply Voltage
OVDD
IVDD
CONDITIONS
LTM9010-14
MAX UNITS
1.9
V
TIMING CHARACTERISTICS
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. (Note 5)
LTM9011-14
SYMBOL
PARAMETER
CONDITIONS
MIN
fS
Sampling Frequency
(Notes 10,11)
l
5
tENCL
ENC Low Time (Note 8)
Duty Cycle Stabilizer Off
Duty Cycle Stabilizer On
l
l
tENCH
ENC High Time (Note 8)
Duty Cycle Stabilizer Off
Duty Cycle Stabilizer On
l
l
tAP
Sample-and-Hold
Acquisition Delay Time
SYMBOL
PARAMETER
LTM9010-14
TYP
MAX
MIN
125
5
3.8
2
4
4
100
100
3.8
2
4
4
100
100
LTM9009-14
TYP
MAX
105
5
4.52
2
4.76
4.76
100
100
4.52
2
4.76
4.76
100
100
0
MIN
TYP
MAX
80
MHz
5.93
2
6.25
6.25
100
100
ns
ns
5.93
2
6.25
6.25
100
100
ns
ns
0
CONDITIONS
MIN
0
TYP
UNITS
ns
MAX
UNITS
Digital Data Outputs (RTERM = 100Ω Differential, CL = 2pF to GND on Each Output)
1/(8 • fS)
1/(7 • fS)
1/(6 • fS)
1/(16 • fS)
1/(14 • fS)
1/(12 • fS)
tSER
Serial Data Bit Period
2-Lanes, 16-Bit Serialization
2-Lanes, 14-Bit Serialization
2-Lanes, 12-Bit Serialization
1-Lane, 16-Bit Serialization
1-Lane, 14-Bit Serialization
1-Lane, 12-Bit Serialization
tFRAME
FR to DCO Delay
(Note 8)
l
tDATA
DATA to DCO Delay
(Note 8)
l
tPD
Propagation Delay
(Note 8)
l
tR
Output Rise Time
tF
s
s
s
s
s
s
0.35 • tSER
0.5 • tSER
0.65 • tSER
s
0.35 • tSER
0.5 • tSER
0.65 • tSER
s
0.7n + 2 • tSER 1.1n + 2 • tSER 1.5n + 2 • tSER
s
Data, DCO, FR, 20% to 80%
0.17
ns
Output Fall Time
Data, DCO, FR, 20% to 80%
0.17
ns
DCO Cycle-Cycle Jitter
tSER = 1ns
Pipeline Latency
60
psP-P
6
Cycles
Rev D
6
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
TIMING CHARACTERISTICS
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SPI Port Timing (Note 8)
tSCK
SCK Period
tS
Write Mode
Read Back Mode, CSDO = 20pF,
RPULLUP = 2k
l
l
40
250
ns
ns
CS to SCK Setup Time
l
5
ns
tH
SCK to CS Setup Time
l
5
ns
tDS
SDI Setup Time
l
5
ns
tDH
SDI Hold Time
l
5
ns
tDO
SCK Falling to SDO Valid
Read Back Mode, CSDO = 20pF,
RPULLUP = 2k
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All voltage values are with respect to GND (unless otherwise
noted).
Note 3: When these pin voltages are taken below GND or above VDD, they
will be clamped by internal diodes. This product can handle input currents
of greater than 100mA below GND or above VDD without latchup.
Note 4: When these pin voltages are taken below GND they will be
clamped by internal diodes. When these pin voltages are taken above VDD
they will not be clamped by internal diodes. This product can handle input
currents of greater than 100mA below GND without latchup.
Note 5: VDD = OVDD = 1.8V, fSAMPLE = 125MHz (LTM9011), 105MHz
(LTM9010), or 80MHz (LTM9009), 2-lane output mode, differential ENC+/
ENC– = 2VP-P sine wave, input range = 2VP-P with differential drive, unless
otherwise noted.
Note 6: Integral nonlinearity is defined as the deviation of a code from a
best fit straight line to the transfer curve. The deviation is measured from
the center of the quantization band.
l
125
ns
Note 7: Offset error is the offset voltage measured from –0.5 LSB when
the output code flickers between 00 0000 0000 0000 and 11 1111 1111
1111 in 2’s complement output mode.
Note 8: Guaranteed by design, not subject to test.
Note 9: VDD = OVDD = 1.8V, fSAMPLE = 125MHz (LTM9011), 105MHz
(LTM9010), or 80MHz (LTM9009), 2-lane output mode, differential
ENC+/ENC– = 2VP-P sine wave, input range = 2VP-P with differential
drive, unless otherwise noted. The supply current and power dissipation
specifications are totals for the entire device, not per channel.
Note 10: Recommended operating conditions.
Note 11: The maximum sampling frequency depends on the speed grade
of the part and also which serialization mode is used. The maximum serial
data rate is 1000Mbps so tSER must be greater than or equal to 1ns.
Note 12: Near-channel crosstalk refers to Ch. 1 to Ch.2, and Ch.7 to Ch.8.
Far-channel crosstalk refers to Ch.1 to Ch.7, Ch.1 to Ch.8, Ch.2 to Ch.7, and
Ch.2 to Ch.8.
Rev D
For more information www.analog.com
7
LTM9011-14/
LTM9010-14/LTM9009-14
TIMING DIAGRAMS
2-Lane Output Mode, 16-Bit Serialization*
tAP
ANALOG
INPUT
N+1
N
tENCH
ENC–
tENCL
ENC+
tSER
DCO–
DCO+
tFRAME
FR–
FR+
tDATA
tSER
tPD
OUT#A–
OUT#A+
OUT#B–
OUT#B+
tSER
D5
D3
D1
0
D13 D11 D9
D7
D5
D3
D1
0
D13 D11 D9
D4
D2
D0
0
D12 D10 D8
D6
D4
D2
D0
0
D12 D10 D8
SAMPLE N-6
SAMPLE N-5
SAMPLE N-4
9009101114 TD01
*SEE THE DIGITAL OUTPUTS SECTION
2-Lane Output Mode, 14-Bit Serialization
tAP
ANALOG
INPUT
N+2
N
tENCH
ENC–
N+1
tENCL
ENC+
tSER
DCO–
DCO+
tFRAME
FR–
FR+
OUT#A–
OUT#A+
OUT#B–
OUT#B+
tDATA
tSER
tPD
tSER
D7
D5
D3
D1 D13 D11 D9
D7
D5
D3
D1 D13 D11 D9
D7
D5
D3
D1 D13 D11 D9
D6
D4
D2
D0 D12 D10 D8
D6
D4
D2
D0 D12 D10 D8
D6
D4
D2
D0 D12 D10 D8
SAMPLE N-6
SAMPLE N-5
SAMPLE N-4
SAMPLE N-3
9009101114 TD02
NOTE THAT IN THIS MODE FR+/FR– HAS TWO TIMES THE PERIOD OF ENC+/ENC–
Rev D
8
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
TIMING DIAGRAMS
2-Lane Output Mode, 12-Bit Serialization
tAP
ANALOG
INPUT
N
N+1
tENCH
ENC–
tENCL
ENC+
tSER
DCO–
DCO+
FR+
tFRAME
tDATA
tPD
tSER
FR–
OUT#A–
OUT#A+
OUT#B–
OUT#B+
tSER
D9
D7
D5
D3 D13 D11 D9
D7
D5
D3 D13 D11 D9
D8
D6
D4
D2 D12 D10 D8
D6
D4
D2 D12 D10 D8
SAMPLE N-6
SAMPLE N-5
SAMPLE N-4
9009101114 TD03
1-Lane Output Mode, 16-Bit Serialization
tAP
ANALOG
INPUT
N+1
N
tENCH
ENC–
tENCL
ENC+
tSER
DCO–
DCO+
tFRAME
FR–
FR+
OUT#A–
OUT#A+
tDATA
tSER
tPD
D1
D0
SAMPLE N-6
0
tSER
0
D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
SAMPLE N-5
D1
D0
0
0
D13 D12 D11 D10
SAMPLE N-4
9009101114 TD04
OUT#B+, OUT#B– ARE DISABLED
Rev D
For more information www.analog.com
9
LTM9011-14/
LTM9010-14/LTM9009-14
TIMING DIAGRAMS
1-Lane Output Mode, 14-Bit Serialization
tAP
ANALOG
INPUT
N+1
N
tENCH
ENC–
tENCL
ENC+
tSER
DCO–
DCO+
tFRAME
FR–
FR+
OUT#A–
OUT#A+
tDATA
tSER
tPD
D3
D2
D1
tSER
D0 D13 D12 D11 D10 D9
SAMPLE N-6
D8
D7
D6
D5
D4
D3
D2
SAMPLE N-5
D1
D0 D13 D12 D11 D10
SAMPLE N-4
9009101114 TD06
OUT#B+, OUT#B– ARE DISABLED
1-Lane Output Mode, 12-Bit Serialization
tAP
ANALOG
INPUT
N+1
N
tENCH
ENC–
tENCL
ENC+
tSER
DCO–
DCO+
tFRAME
FR–
FR+
OUT#A–
OUT#A+
tDATA
tSER
tPD
D5
D4
SAMPLE N-6
D3
tSER
D2 D13 D12 D11 D10 D9
D8
D7
D6
D5
SAMPLE N-5
D4
D3
D2 D13 D12 D11
SAMPLE N-4
9009101114 TD07
OUT#B+, OUT#B– ARE DISABLED
Rev D
10
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
TIMING DIAGRAMS
SPI Port Timing (Readback Mode)
tDS
tS
tDH
tSCK
tH
CS
SCK
tDO
SDI
SDO
R/W
A6
A5
A4
A3
A2
A1
A0
XX
D7
HIGH IMPEDANCE
XX
D6
XX
D5
XX
D4
XX
D3
XX
D2
XX
XX
D1
D0
SPI Port Timing (Write Mode)
CS
SCK
SDI
SDO
R/W
A6
A5
A4
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
9009101114 TD08
HIGH IMPEDANCE
Rev D
For more information www.analog.com
11
LTM9011-14/
LTM9010-14/LTM9009-14
TYPICAL PERFORMANCE CHARACTERISTICS
LTM9011-14: Integral
Nonlinearity (INL)
LTM9011-14: Differential
Nonlinearity (DNL)
2.0
1.0
0
1.5
0.8
–10
0
–0.5
–1.0
0
–0.2
–0.4
0
4096
8192
12288
OUTPUT CODE
–1.0
16384
0
4096
9009101114 G01
LTM9011-14: 8k Point FFT,
fIN = 30MHz, –1dBFS, 125Msps
0
–40
–50
–60
–70
–80
–90
–100
–0.8
8192
12288
OUTPUT CODE
16384
–110
–120
LTM9011-14: 8k Point FFT,
fIN = 70MHz, –1dBFS, 125Msps
0
–10
–20
–20
–20
–30
–30
–30
–50
–60
–70
–80
AMPLITUDE (dBFS)
–10
–40
–40
–50
–60
–70
–80
–110
–120
60
0
10
20
30
40
FREQUENCY (MHz)
50
60
LTM9011-14: 8k Point FFT,
fIN = 140MHz, –1dBFS, 125Msps
–80
–110
–120
9009101114 G04
0
10
9009101114 G05
LTM9011-14: 8k Point 2-Tone FFT,
fIN = 70MHz, 75MHz, –7dBFS per
Tone, 125Msps
60
9009101114 G03
–70
–110
–120
50
50
–60
–90
–100
20
30
40
FREQUENCY (MHz)
20
30
40
FREQUENCY (MHz)
–40
–90
–100
10
10
–50
–90
–100
0
0
9009101114 G02
–10
AMPLITUDE (dBFS)
AMPLITUDE (dBFS)
0.2
–0.6
–1.5
0
–30
0.4
AMPLITUDE (dBFS)
DNL ERROR (LSB)
INL ERROR (LSB)
0.5
–2.0
–20
0.6
1.0
LTM9011-14: 8k Point FFT,
fIN = 5MHz, –1dBFS, 125Msps
20
30
40
FREQUENCY (MHz)
50
60
9009101114 G06
LTM9011-14: Shorted Input
Histogram
0
6000
–10
–20
5000
–40
4000
–50
COUNT
AMPLITUDE (dBFS)
–30
–60
–70
3000
–80
2000
–90
–100
1000
–110
–120
0
10
20
30
40
FREQUENCY (MHz)
50
60
0
8178
9009101114 G07
8180
8182
8184
OUTPUT CODE
8186
9009101114 G08
Rev D
12
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
TYPICAL PERFORMANCE CHARACTERISTICS
LTM9011-14: SNR vs Input
Frequency, –1dBFS, 2V Range,
125Msps
LTM9011-14: SFDR vs Input
Frequency, –1dBFS, 2V Range,
125Msps
95
74
110
90
90
SFDR (dBFS)
71
70
69
SFDR (dBc AND dBFS)
72
85
80
75
68
67
80
70
dBc
60
50
40
30
20
70
10
100 150 200 250 300
INPUT FREQUENCY (MHz)
65
350
0
100 150 200 250 300
INPUT FREQUENCY (MHz)
50
80
0
9009101114 G11
LTM9011-14: IVDD vs Sample Rate,
5MHz Sine Wave Input, –1dBFS
LTM9011-14: SNR vs Input Level,
fIN = 70MHz, 2V Range, 125Msps
580
dBFS
70
560
60
540
dBc
IVDD (mA)
50
40
30
520
500
480
20
460
10
440
0
–60
–50
–40
–30
–20
INPUT LEVEL (dBFS)
–10
420
0
0
25
9009101114 G12
50
75
100
SAMPLE RATE (Msps)
125
9009101114 G13
IOVDD vs Sample Rate, 5MHz Sine
Wave Input, –1dBFS
74
100
2-LANE, 3.5mA
LTM9011-14: SNR vs SENSE,
fIN = 5MHz, –1dBFS
73
80
72
1-LANE, 3.5mA
60
2-LANE, 1.75mA
40
71
70
69
68
1-LANE, 1.75mA
20
0
0
–80 –70 –60 –50 –40 –30 –20 –10
INPUT LEVEL (dBFS)
350
9009101114 G10
9009101114 G09
SNR (dBFS)
50
SNR (dBc AND dBFS)
0
IOVDD (mA)
SNR (dBFS)
dBFS
100
73
66
LTM9011-14: SFDR vs Input Level,
fIN = 70MHz, 2V Range, 125Msps
67
0
25
50
75
100
SAMPLE RATE (Msps)
125
66
0.6
9009101114 G14
0.7
0.8
0.9
1
1.1
SENSE PIN (V)
1.2
1.3
9009101114 G15
Rev D
For more information www.analog.com
13
LTM9011-14/
LTM9010-14/LTM9009-14
TYPICAL PERFORMANCE CHARACTERISTICS
LTM9010-14: Integral Nonlinearity
(INL)
LTM9010-14: Differential
Nonlinearity (DNL)
2.0
1.0
0
1.5
0.8
–10
0
–0.5
–1.0
0
–0.2
–0.4
0
4096
8192
12288
OUTPUT CODE
–1.0
16384
–40
–50
–60
–70
–80
–90
–100
–0.8
0
4096
9009101114 G16
8192
12288
OUTPUT CODE
16384
–110
–120
0
–10
–20
–20
–20
–30
–30
–30
–60
–70
–80
AMPLITUDE (dBFS)
0
–10
–50
–40
–50
–60
–70
–80
–70
–80
–110
–120
–110
–120
–110
–120
50
0
10
9009101114 G19
20
30
40
FREQUENCY (MHz)
LTM9010-14: 8k Point 2-Tone FFT,
fIN = 70MHz, 75MHz, –7dBFS per
Tone, 105Msps
9009101114 G18
–60
–90
–100
20
30
40
FREQUENCY (MHz)
50
–40
–90
–100
10
20
30
40
FREQUENCY (MHz)
–50
–90
–100
0
10
LTM9010-14: 8k Point FFT,
fIN = 140MHz, –1dBFS, 105Msps
–10
–40
0
9009101114 G17
LTM9010-14: 8k Point FFT,
fIN = 70MHz, –1dBFS, 105Msps
LTM9010-14: 8k Point FFT,
fIN = 30MHz, –1dBFS, 105Msps
AMPLITUDE (dBFS)
AMPLITUDE (dBFS)
0.2
–0.6
–1.5
0
–30
0.4
AMPLITUDE (dBFS)
DNL ERROR (LSB)
INL ERROR (LSB)
0.5
–2.0
–20
0.6
1.0
LTM9010-14: 8k Point FFT,
fIN = 5MHz, –1dBFS, 105Msps
50
0
10
9009101114 G20
20
30
40
FREQUENCY (MHz)
50
9009101114 G21
LTM9010-14: Shorted Input
Histogram
0
6000
–10
–20
5000
–40
4000
–50
COUNT
AMPLITUDE (dBFS)
–30
–60
–70
3000
–80
2000
–90
–100
1000
–110
–120
0
10
20
30
40
FREQUENCY (MHz)
50
0
8195
9009101114 G22
8197
8199
8201
OUTPUT CODE
8203
9009101114 G23
Rev D
14
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
TYPICAL PERFORMANCE CHARACTERISTICS
LTM9010-14: SNR vs Input
Frequency, –1dBFS, 2V Range,
105Msps
LTM9010-14: SFDR vs Input
Frequency, –1dBFS, 2V Range,
105Msps
74
95
110
90
90
SFDR (dBFS)
71
70
69
SFDR (dBc AND dBFS)
72
85
80
75
68
67
80
70
dBc
60
50
40
30
20
70
10
50
100 150 200 250 300
INPUT FREQUENCY (MHz)
350
65
0
50
9009101114 G24
100 150 200 250 300
INPUT FREQUENCY (MHz)
LTM9010-14: IVDD vs Sample Rate,
5MHz Sine Wave Input, –1dBFS
0
–80 –70 –60 –50 –40 –30 –20 –10 0
INPUT LEVEL (dBFS)
9009101114 G26
LTM9010-14: SNR vs SENSE,
fIN = 5MHz, –1dBFS
460
74
440
73
72
420
400
380
360
71
70
69
68
340
320
350
9009101114 G25
SNR (dBFS)
0
IVDD (mA)
SNR (dBFS)
dBFS
100
73
66
LTM9010-14: SFDR vs Input Level,
fIN = 70MHz, 2V Range, 105Msps
67
0
25
50
75
SAMPLE RATE (Msps)
100
66
0.6
0.7
9009101114 G27
0.8
0.9
1
1.1
SENSE PIN (V)
1.2
1.3
9009101114 G28
Rev D
For more information www.analog.com
15
LTM9011-14/
LTM9010-14/LTM9009-14
TYPICAL PERFORMANCE CHARACTERISTICS
LTM9009-14: Integral Nonlinearity
(INL)
LTM9009-14: Differential
Nonlinearity (DNL)
2.0
1.0
0
1.5
0.8
–10
0
–0.5
–1.0
0.2
0
–0.2
–0.4
–0.8
0
4096
8192
12288
OUTPUT CODE
–1.0
16384
0
4096
9009101114 G29
LTM9009-14: 8k Point FFT,
fIN = 30MHz, –1dBFS, 80Msps
–40
–50
–60
–70
–80
–90
–100
–0.6
–1.5
8192
12288
OUTPUT CODE
16384
–110
–120
0
0
–10
–10
–20
–20
–20
–30
–30
–30
–60
–70
–80
AMPLITUDE (dBFS)
0
–50
–40
–50
–60
–70
–80
–60
–70
–80
–90
–100
–110
–120
–110
–120
–110
–120
20
30
FREQUENCY (MHz)
40
0
10
9009101114 G32
20
30
FREQUENCY (MHz)
40
0
0
10
9009101114 G33
LTM9009-14: 8k Point 2-Tone FFT,
fIN = 70MHz, 75MHz, –7dBFS per
Tone, 80Msps
40
9009101114 G31
–40
–90
–100
10
20
30
FREQUENCY (MHz)
–50
–90
–100
0
10
LTM9009-14: 8k Point FFT,
fIN = 140MHz, –1dBFS, 80Msps
–10
–40
0
9009101114 G30
LTM9009-14: 8k Point FFT,
fIN = 70MHz, –1dBFS, 80Msps
AMPLITUDE (dBFS)
AMPLITUDE (dBFS)
–30
0.4
AMPLITUDE (dBFS)
DNL ERROR (LSB)
INL ERROR (LSB)
0.5
–2.0
–20
0.6
1.0
LTM9009-14: 8k Point FFT,
fIN = 5MHz, –1dBFS, 80Msps
20
30
FREQUENCY (MHz)
40
9009101114 G34
LTM9009-14: Shorted Input
Histogram
6000
–10
–20
5000
–40
4000
–50
COUNT
AMPLITUDE (dBFS)
–30
–60
3000
–70
–80
2000
–90
–100
1000
–110
–120
0
10
20
30
FREQUENCY (MHz)
40
0
8184
9009101114 G35
8186
8188
8190
OUTPUT CODE
8192
9009101114 G36
Rev D
16
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
TYPICAL PERFORMANCE CHARACTERISTICS
LTM9009-14: SNR vs Input
Frequency, –1dBFS, 2V Range,
80Msps
LTM9009-14: SFDR vs Input
Frequency, –1dBFS, 2V Range,
80Msps
74
LTM9009-14: SFDR vs Input Level,
fIN = 70MHz, 2V Range, 80Msps
95
73
110
100
90
70
69
SFDR (dBc AND dBFS)
SFDR (dBFS)
SNR (dBFS)
71
85
80
75
68
66
0
50
100 150 200 250 300
INPUT FREQUENCY (MHz)
350
0
50
100 150 200 250 300
INPUT FREQUENCY (MHz)
dBc
60
50
40
30
0
–80 –70 –60 –50 –40 –30 –20 –10
INPUT LEVEL (dBFS)
350
9009101114 G38
LTM9009-14: IVDD vs Sample Rate,
5MHz Sine Wave Input, –1dBFS
380
74
LTM9009-14: SNR vs SENSE,
fIN = 5MHz, –1dBFS
DCO Cycle-Cycle Jitter vs Serial
Data Rate
350
PEAK-TO-PEAK JITTER (ps)
300
SNR (dBFS)
72
340
320
71
70
69
68
300
20
40
60
SAMPLE RATE (Msps)
80
9009101114 G40
66
250
200
150
100
50
67
0
0
9009101114 G39
73
360
IVDD (mA)
70
10
65
9009101114 G37
280
80
20
70
67
dBFS
90
72
0.6
0.7
0.8
0.9
1
1.1
SENSE PIN (V)
1.2
1.3
9009101114 G41
0
0
200
400
600
800
SERIAL DATA RATE (Mbps)
1000
9009101114 G42
Rev D
For more information www.analog.com
17
LTM9011-14/
LTM9010-14/LTM9009-14
PIN FUNCTIONS
AIN1+ (B2): Channel 1 Positive Differential Analog Input.
AIN8+ (N1): Channel 8 Positive Differential Analog Input.
AIN1– (B1): Channel 1 Negative Differential Analog Input.
AIN8– (N2): Channel 8 Negative Differential Analog Input
VCM14 (B3): Common Mode Bias Output, Nominally Equal
to VDD/2. VCM should be used to bias the common mode
of the analog inputs of channels 1 and 4. VCM is internally
bypassed to ground with a 0.1µF ceramic capacitor. No
external capacitance is required.
VDD (D3, D4, E3, E4, K3, K4, L3, L4): 1.8V Analog Power
Supply. VDD is internally bypassed to ground with 0.1μF
ceramic capacitors.
AIN2+ (C2): Channel 2 Positive Differential Analog Input.
AIN2– (C1): Channel 2 Negative Differential Analog Input.
AIN3+ (E2): Channel 3 Positive Differential Analog Input.
AIN3– (E1): Channel 3 Negative Differential Analog Input.
VCM23 (F3): Common Mode Bias Output, Nominally Equal
to VDD/2. VCM should be used to bias the common mode
of the analog inputs of channels 2 and 3. VCM is internally
bypassed to ground with a 0.1µF ceramic capacitor. No
external capacitance is required.
AIN4+ (G2): Channel 4 Positive Differential Analog Input.
AIN4– (G1): Channel 4 Negative Differential Analog Input.
AIN5+ (H1): Channel 5 Positive Differential Analog Input.
AIN5– (H2): Channel 5 Negative Differential Analog Input.
VCM67 (J3): Common Mode Bias Output, Nominally Equal
to VDD/2. VCM should be used to bias the common mode
of the analog inputs of channels 6 and 7. VCM is internally
bypassed to ground with a 0.1µF ceramic capacitor. No
external capacitance is required.
AIN6+ (K1): Channel 6 Positive Differential Analog Input.
AIN6– (K2): Channel 6 Negative Differential Analog Input.
AIN7+ (M1): Channel 7 Positive Differential Analog Input.
AIN7– (M2): Channel 7 Negative Differential Analog Input.
VCM58 (N3): Common Mode Bias Output, Nominally Equal
to VDD/2. VCM should be used to bias the common mode
of the analog inputs of channels 5 and 8. VCM is internally
bypassed to ground with a 0.1µF ceramic capacitor. No
external capacitance is required.
ENC+ (P5): Encode Input. Conversion starts on the rising
edge.
ENC– (P6): Encode Complement Input. Conversion starts
on the falling edge.
CSA (L5): In serial programming mode, (PAR/SER = 0V),
CSA is the serial interface chip select input for registers
controlling channels 1, 4, 5 and 8. When CS is low, SCK
is enabled for shifting data on SDI into the mode control registers. In parallel programming mode (PAR/SER
= VDD), CS selects 2-lane or 1-lane output mode. CS can
be driven with 1.8V to 3.3V logic.
CSB (M5): In serial programming mode, (PAR/SER = 0V),
CSB is the serial interface chip select input for registers
controlling channels 2, 3, 6 and 7. When CS is low, SCK
is enabled for shifting data on SDI into the mode control registers. In parallel programming mode (PAR/SER
= VDD), CS selects 2-lane or 1-lane output mode. CS can
be driven with 1.8V to 3.3V logic.
SCK (L6): In serial programming mode, (PAR/SER = 0V),
SCK is the serial interface clock input. In parallel programming mode (PAR/SER = VDD), SCK selects 3.5mA
or 1.75mA LVDS output currents. SCK can be driven with
1.8V to 3.3V logic.
SDI (M6): In serial programming mode, (PAR/SER =
0V), SDI is the serial interface data Input. Data on SDI
is clocked into the mode control registers on the rising
edge of SCK. In parallel programming mode (PAR/SER =
VDD), SDI can be used to power down the part. SDI can
be driven with 1.8V to 3.3V logic.
GND (See Pin Configuration Table): ADC Power Ground.
Use multiple vias close to pins.
Rev D
18
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
PIN FUNCTIONS
OVDD (G9, G10): Output Driver Supply. OVDD is internally
bypassed to ground with a 0.1µF ceramic capacitor.
SDOA (E6): In serial programming mode, (PAR/SER = 0V),
SDOA is the optional serial interface data output for registers controlling channels 1, 4, 5 and 8. Data on SDO is
read back from the mode control registers and can be
latched on the falling edge of SCK. SDO is an open-drain
N-channel MOSFET output that requires an external 2k
pull-up resistor from 1.8V to 3.3V. If read back from the
mode control registers is not needed, the pull-up resistor is not necessary and SDO can be left unconnected. In
parallel programming mode (PAR/SER = VDD), SDOA is an
input that enables internal 100Ω termination resistors on
the digital outputs of channels 1, 4, 5 and 8. When used
as an input, SDO can be driven with 1.8V to 3.3V logic
through a 1k series resistor.
SDOB (D6): Serial Data Output Pin for Channels 2, 3, 6
and 7. See description for SDOA.
PAR/SER (A7): Programming Mode Selection Pin. Connect
to ground to enable the serial programming mode. CSA,
CSB, SCK, SDI, SDOA and SDOB become a serial interface
that control the A/D operating modes. Connect to VDD to
enable parallel programming mode where CSA, CSB, SCK,
SDI, SDOA and SDOB become parallel logic inputs that
control a reduced set of the A/D operating modes. PAR/
SER should be connected directly to ground or the VDD
of the part and not be driven by a logic signal.
VREF (B6): Reference Voltage Output. VREF is internally
bypassed to ground with a 1μF ceramic capacitor, nominally 1.25V.
SENSE (C5): Reference Programming Pin. Connecting
SENSE to VDD selects the internal reference and a ±1V
input range. Connecting SENSE to ground selects the
internal reference and a ±0.5V input range. An external
reference between 0.625V and 1.3V applied to SENSE
selects an input range of ±0.8 • VSENSE. SENSE is internally bypassed to ground with a 0.1µF ceramic capacitor.
LVDS Outputs
All pins in this section are differential LVDS outputs.
The output current level is programmable. There is an
optional internal 100Ω termination resistor between the
pins of each LVDS output pair.
OUT1A–/OUT1A+, OUT1B–/OUT1B+ (E7/E8, C8/D8):
Serial Data Outputs for Channel 1. In 1-lane output mode
only OUT1A–/OUT1A+ are used.
OUT2A–/OUT2A+, OUT2B–/OUT2B+ (B8/A8, D7/C7):
Serial Data Outputs for Channel 2. In 1-lane output mode
only OUT2A–/OUT2A+ are used.
OUT3A–/OUT3A+, OUT3B–/OUT3B+ (D10/D9, E10/E9):
Serial Data Outputs for Channel 3. In 1-lane output mode
only OUT3A–/OUT3A+ are used.
OUT4A–/OUT4A+, OUT4B–/OUT4B+ (C9/C10, F7/F8):
Serial Data Outputs for Channel 4. In 1-lane output mode
only OUT4A–/OUT4A+ are used.
OUT5A–/OUT5A+, OUT5B–/OUT5B+ (J8/J7, K8/K7): Serial
Data Outputs for Channel 5. In 1-lane output mode only
OUT5A–/OUT5A+ are used.
OUT6A–/OUT6A+, OUT6B–/OUT6B+ (K9/K10, L9/L10):
Serial Data Outputs for Channel 6. In 1-lane output mode
only OUT6A–/OUT6A+ are used.
OUT7A–/OUT7A+, OUT7B–/OUT7B+ (M7/L7, P8/N8):
Serial Data Outputs for Channel 7. In 1-lane output mode
only OUT7A–/OUT7A+ are used.
OUT8A–/OUT8A+, OUT8B–/OUT8B+ (L8/M8, M10/M9):
Serial Data Outputs for Channel 8. In 1-lane output mode
only OUT8A–/OUT8A+ are used.
FRA–/FRA+ (H7/H8): Frame Start Outputs for Channels
1, 4, 5 and 8.
FRB–/FRB+ (J9/J10): Frame Start Outputs for Channels
2, 3, 6 and 7.
DCOA–/DCOA+ (G8/G7): Data Clock Outputs for Channels
1, 4, 5 and 8.
DCOB–/DCOB+ (F10, F9): Data Clock Outputs for Channels 2, 3, 6 and 7.
Rev D
For more information www.analog.com
19
LTM9011-14/
LTM9010-14/LTM9009-14
PIN CONFIGURATION TABLE
1
2
3
4
5
6
7
8
9
10
A
GND
GND
GND
GND
GND
GND
PAR/SER
OUT2A+
GND
GND
B
AIN1–
AIN1+
VCM14
GND
GND
VREF
GND
OUT2A–
GND
GND
C
AIN2
–
+
AIN2
GND
GND
SENSE
GND
OUT2B+
OUT1B–
OUT4A–
OUT4A+
D
GND
GND
VDD
VDD
GND
SDOB
OUT2B–
OUT1B+
OUT3A+
OUT3A–
E
AIN3–
AIN3+
VDD
VDD
GND
SDOA
OUT1A–
OUT1A+
OUT3B+
OUT3B–
F
GND
GND
VCM23
GND
GND
GND
OUT4B–
OUT4B+
DCOB+
DCOB–
G
AIN4–
AIN4+
GND
GND
GND
GND
DCOA+
DCOA–
OVDD
OVDD
H
+
–
GND
FRA–
FRA+
GND
GND
OUT5A–
FRB–
FRB+
AIN5
AIN5
GND
GND
GND
J
GND
GND
VCM67
GND
GND
GND
OUT5A+
K
AIN6+
AIN6–
VDD
VDD
GND
GND
OUT5B+
OUT5B–
OUT6A–
OUT6A+
L
GND
GND
VDD
VDD
CSA
SCK
OUT7A+
OUT8A–
OUT6B–
OUT6B+
M
AIN7+
AIN7–
GND
GND
CSB
SDI
OUT7A–
OUT8A+
OUT8B+
OUT8B–
N
+
–
GND
OUT7B+
GND
GND
GND
OUT7B–
GND
GND
AIN8
P
GND
AIN8
GND
VCM58
GND
GND
GND
GND
GND
ENC+
ENC–
Top View of BGA Package (Looking Through Component).
Rev D
20
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
FUNCTIONAL BLOCK DIAGRAM
VDD = 1.8V
OVDD = 1.8V
CH 1
ANALOG
INPUT
S/H
14-BIT
ADC CORE
OUT1A+
OUT1A–
OUT1B+
OUT1B–
CH 2
ANALOG
INPUT
S/H
14-BIT
ADC CORE
OUT2A+
OUT2A–
OUT2B+
OUT2B–
CH 3
ANALOG
INPUT
S/H
14-BIT
ADC CORE
OUT3A+
OUT3A–
OUT3B+
OUT3B–
CH 4
ANALOG
INPUT
S/H
14-BIT
ADC CORE
OUT4A+
OUT4A–
OUT4B+
OUT4B–
DATA
SERIALIZER
CH 5
ANALOG
INPUT
S/H
14-BIT
ADC CORE
OUT5A+
OUT5A–
OUT5B+
OUT5B–
CH 6
ANALOG
INPUT
S/H
14-BIT
ADC CORE
OUT6A+
OUT6A–
OUT6B+
OUT6B–
CH 7
ANALOG
INPUT
S/H
14-BIT
ADC CORE
OUT7A+
OUT7A–
OUT7B+
OUT7B–
CH 8
ANALOG
INPUT
S/H
14-BIT
ADC CORE
OUT8A+
OUT8A–
OUT8B+
OUT8B–
ENC+
DCOA±
DCOB±
FRA±
FRB±
PLL
ENC–
1.25V
REFERENCE
VREF
REFH
RANGE
SELECT
REFL
REF
BUFFER
SDOA
SDOB
SDI
SCK
CSA
CSB
PAR/SER
MODE
CONTROL
REGISTERS
VDD/2
DIFF
REF
AMP
GND
9009101114 F01
SENSE
VCM14
Figure 1. Figure 1. Functional Block Diagram
For more information www.analog.com
VCM58
VCM23
VCM67
Rev D
21
LTM9011-14/
LTM9010-14/LTM9009-14
APPLICATIONS INFORMATION
CONVERTER OPERATION
INPUT DRIVE CIRCUITS
The LTM9011-14/LTM9010-14/LTM9009-14 are low
power, 8-channel, 14-bit, 125Msps/105Msps/80Msps A/D
converters that are powered by a single 1.8V supply. The
analog inputs should be driven differentially. The encode
input can be driven differentially for optimal jitter performance, or single-ended for lower power consumption.
The digital outputs are serial LVDS to minimize the number of data lines. Each channel outputs two bits at a time
(2-lane mode). At lower sampling rates there is a one bit
per channel option (1-lane mode). Many additional features can be chosen by programming the mode control
registers through a serial SPI port.
Input Filtering
ANALOG INPUT
The analog inputs are differential CMOS sample-and-hold
circuits (Figure 2). The inputs should be driven differentially around a common mode voltage set by the appropriate VCM output pins, which are nominally VDD/2. For the
2V input range, the inputs should swing from VCM – 0.5V
to VCM + 0.5V. There should be 180° phase difference
between the inputs.
The eight channels are simultaneously sampled by a
shared encode circuit (Figure 2).
If possible, there should be an RC low pass filter right at
the analog inputs. This lowpass filter isolates the drive circuitry from the A/D sample-and-hold switching, and also
limits wideband noise from the drive circuitry. Figure 3
shows an example of an input RC filter. The RC component
values should be chosen based on the application’s input
frequency.
Transformer Coupled Circuits
Figure 3 shows the analog input being driven by an RF
transformer with a center-tapped secondary. The center
tap is biased with VCM, setting the A/D input at its optimal DC level. At higher input frequencies a transmission
line balun transformer (Figures 4 to 6) has better balance,
resulting in lower A/D distortion.
50Ω
0.1µF
0.1µF
ANALOG
INPUT
T1
1:1
25Ω
25Ω
AIN+
VDD
RON
25Ω
10Ω
AIN–
CSAMPLE
3.5pF
RON
25Ω
10Ω
VDD
CSAMPLE
3.5pF
LTM9011-14
0.1µF
25Ω
T1: MA/COM MABAES0060
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
CPARASITIC
1.8pF
VDD
AIN+
12pF
25Ω
LTM9011-14
VCM
AIN–
9009101114 F03
Figure 3. Analog Input Circuit Using a Transformer.
Recommended for Input Frequencies from 5MHz to 70MHz
CPARASITIC
1.8pF
1.2V
10k
ENC+
ENC–
10k
1.2V
9009101114 F02
Figure 2. Equivalent Input Circuit. Only One
of the Eight Analog Channels Is Shown
Rev D
22
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
APPLICATIONS INFORMATION
Amplifier Circuits
Figure 7 shows the analog input being driven by a high
speed differential amplifier. The output of the amplifier is
AC-coupled to the A/D so the amplifier’s output common
mode voltage can be optimally set to minimize distortion.
See back page for a DC-coupled example.
50Ω
At very high frequencies an RF gain block will often have
lower distortion than a differential amplifier. If the gain
block is single-ended, then a transformer circuit (Figures
4 to 6) should convert the signal to differential before
driving the A/D.
50Ω
VCM
VCM
0.1µF
0.1µF
ANALOG
INPUT
0.1µF
0.1µF
AIN+
T2
T1
25Ω
LTM9011-14
0.1µF
ANALOG
INPUT
AIN+
T2
T1
25Ω
LTM9011-14
0.1µF
4.7pF
0.1µF
25Ω
1.8pF
0.1µF
–
AIN
25Ω
AIN–
9009101114 F04
T1: MA/COM MABA-007159-000000
T2: COILCRAFT WBC1-1LB
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
T1: MA/COM MABA-007159-000000
T2: MA/COM MABAES0060
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
Figure 4. Recommended Front End Circuit for Input
Frequencies from 70MHz to 170MHz
50Ω
9009101114 F05
Figure 5. Recommended Front End Circuit for Input
Frequencies from 170MHz to 300MHz
VCM
VCM
HIGH SPEED
DIFFERENTIAL
0.1µF
AMPLIFIER
0.1µF
0.1µF
2.7nH
ANALOG
INPUT
25Ω
+
AIN
LTM9011-14
0.1µF
T1
0.1µF
25Ω
2.7nH
AIN–
ANALOG
INPUT
+
+
–
–
200Ω
200Ω
25Ω
0.1µF
AIN+
LTM9011-14
12pF
0.1µF
25Ω
AIN–
9009101114 F07
9009101114 F06
T1: MA/COM ETC1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
Figure 6. Recommended Front End Circuit for Input
Frequencies Above 300MHz
Figure 7. Front End Circuit Using a High Speed
Differential Amplifier
Rev D
For more information www.analog.com
23
LTM9011-14/
LTM9010-14/LTM9009-14
APPLICATIONS INFORMATION
Reference
The input range can be adjusted by applying a voltage to
SENSE that is between 0.625V and 1.30V. The input range
will then be 1.6 • VSENSE. The reference is shared by all
eight ADC channels, so it is not possible to independently
adjust the input range of individual channels.
The LTM9011-14/LTM9010-14/LTM9009-14 has an internal 1.25V voltage reference. For a 2V input range using
the internal reference, connect SENSE to VDD. For a 1V
input range using the internal reference, connect SENSE
to ground. For a 2V input range with an external reference,
apply a 1.25V reference voltage to SENSE (Figure 9).
VREF
1.25V
LTM9011-14
The VREF , SENSE, REFH and REFL pins are internally
bypassed, as shown in Figure 8.
5Ω
1.25V BANDGAP
REFERENCE
1µF
0.625V
TIE TO VDD FOR 2V RANGE;
TIE TO GND FOR 1V RANGE;
RANGE = 1.6 • VSENSE FOR
0.65V < VSENSE < 1.300V
RANGE
DETECT
AND
CONTROL
SENSE
0.1µF
INTERNAL ADC
BUFFER
HIGH REFERENCE
0.1µF
2.2µF
REFH
0.1µF
0.1µF
0.8x
DIFF AMP
REFL
INTERNAL ADC
LOW REFERENCE
9009101114 F08
Figure 8. Reference Circuit
1.25V
EXTERNAL
REFERENCE
LTM9011-14
SENSE
1µF
9009101114 F09
Figure 9. Using an External 1.25V Reference
Rev D
24
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
APPLICATIONS INFORMATION
Encode Input
The signal quality of the encode inputs strongly affects
the A/D noise performance. The encode inputs should
be treated as analog signals—do not route them next to
digital traces on the circuit board. There are two modes
of operation for the encode inputs: the differential encode
mode (Figure 10), and the single-ended encode mode
(Figure 11).
The differential encode mode is recommended for sinusoidal, PECL, or LVDS encode inputs (Figures 12 and 13).
LTM9011-14
The encode inputs are internally biased to 1.2V through
10k equivalent resistance. The encode inputs can be taken
above VDD (up to 3.6V), and the common mode range is
from 1.1V to 1.6V. In the differential encode mode, ENC–
should stay at least 200mV above ground to avoid falsely
triggering the single-ended encode mode. For good jitter
performance ENC+ should have fast rise and fall times.
The single-ended encode mode should be used with
CMOS encode inputs. To select this mode, ENC– is connected to ground and ENC+ is driven with a square wave
VDD
DIFFERENTIAL
COMPARATOR
VDD
15k
ENC+
LTM9011-14
1.8V TO
3.3V
ENC–
0V
30k
ENC+
ENC–
30k
9009101114 F11
9009101114 F10
Figure 10. Equivalent Encode Input Circuit
for Differential Encode Mode
0.1µF
ENC+
T1
0.1µF
Figure 11. Equivalent Encode Input Circuit for
Single-Ended Encode Mode
LTM9011-14
0.1µF
50Ω
100Ω
PECL OR
LVDS
CLOCK
50Ω
0.1µF
CMOS LOGIC
BUFFER
ENC–
9009101114 F12
ENC+
LTM9011-14
0.1µF
ENC–
9009101114 F13
T1 = MA/COM ETC1-1-13
RESISTORS AND CAPACITORS
ARE 0402 PACKAGE SIZE
Figure 12. Sinusoidal Encode Drive
Figure 13. PECL or LVDS Encode Drive
Rev D
For more information www.analog.com
25
LTM9011-14/
LTM9010-14/LTM9009-14
APPLICATIONS INFORMATION
encode input. ENC+ can be taken above VDD (up to 3.6V)
so 1.8V to 3.3V CMOS logic levels can be used. The ENC+
threshold is 0.9V. For good jitter performance ENC+
should have fast rise and fall times.
serialization (see the Timing Diagrams section for details).
Note that with 12-bit serialization the two LSBs are not
available—this mode is included for compatibility with
12-bit versions of these parts.
Clock PLL and Duty Cycle Stabilizer
The output data should be latched on the rising and falling
edges of the data clock out (DCO). A data frame output
(FR) can be used to determine when the data from a new
conversion result begins. In the 2-lane, 14-bit serialization
mode, the frequency of the FR output is halved.
The encode clock is multiplied by an internal phase-locked
loop (PLL) to generate the serial digital output data. If the
encode signal changes frequency or is turned off, the PLL
requires 25µs to lock onto the input clock.
A clock duty cycle stabilizer circuit allows the duty cycle
of the applied encode signal to vary from 30% to 70%.
In the serial programming mode it is possible to disable
the duty cycle stabilizer, but this is not recommended. In
the parallel programming mode the duty cycle stabilizer
is always enabled.
DIGITAL OUTPUTS
The digital outputs of the LTM9011-14/LTM9010-14/
LTM9009-14 are serialized LVDS signals. Each channel
outputs two bits at a time (2-lane mode). At lower sampling rates there is a one bit per channel option (1-lane
mode). The data can be serialized with 16, 14, or 12-bit
The maximum serial data rate for the data outputs is
1Gbps, so the maximum sample rate of the ADC will depend on the serialization mode as well as the speed grade
of the ADC (see Table 1). The minimum sample rate for
all serialization modes is 5Msps.
By default the outputs are standard LVDS levels: 3.5mA
output current and a 1.25V output common mode voltage. An external 100Ω differential termination resistor
is required for each LVDS output pair. The termination
resistors should be located as close as possible to the
LVDS receiver.
The outputs are powered by OVDD which is independent
from the A/D core power.
Table 1. Maximum Sampling Frequency for All Serialization Modes. Note That These Limits Are for the LTM9011-14. The
Sampling Frequency for the Slower Speed Grades Cannot Exceed 105MHz (LTM9010-14) or 80MHz (LTM9009-14).
SERIALIZATION MODE
MAXIMUM SAMPLING
FREQUENCY, fS (MHz)
DCO FREQUENCY
FR FREQUENCY
SERIAL DATA RATE
2-Lane
16-Bit Serialization
125
4 • fS
fS
8 • fS
2-Lane
14-Bit Serialization
125
3.5 • fS
0.5 • fS
7 • fS
2-Lane
12-Bit Serialization
125
3 • fS
fS
6 • fS
1-Lane
16-Bit Serialization
62.5
8 • fS
fS
16 • fS
1-Lane
14-Bit Serialization
71.4
7 • fS
fS
14 • fS
1-Lane
12-Bit Serialization
83.3
6 • fS
fS
12 • fS
Rev D
26
For more information www.analog.com
LTM9011-14/
LTM9010-14/LTM9009-14
APPLICATIONS INFORMATION
Programmable LVDS Output Current
Table 2. Output Codes vs Input Voltage
The default output driver current is 3.5mA. This current
can be adjusted by control register A2 in the serial programming mode. Available current levels are 1.75mA,
2.1mA, 2.5mA, 3mA, 3.5mA, 4mA and 4.5mA. In the parallel programming mode, the SCK pin can select either
3.5mA or 1.75mA.
Optional LVDS Driver Internal Termination
In most cases, using just an external 100Ω termination resistor will give excellent LVDS signal integrity. In
addition, an optional internal 100Ω termination resistor
can be enabled by serially programming mode control register A2. The internal termination helps absorb
any reflections caused by imperfect termination at the
receiver. When the internal termination is enabled, the
output driver current is doubled to maintain the same
output voltage swing. In the parallel programming
mode the SDO pin enables internal termination. Internal
termination should only be used with 1.75mA, 2.1mA or
2.5mA LVDS output current modes.
DATA FORMAT
Table 2 shows the relationship between the analog input
voltage and the digital data output bits. By default the
output data format is offset binary. The 2’s complement
format can be selected by serially programming mode
control register A1.
AIN+ – AIN–
(2V RANGE)
D13-D0
(OFFSET BINARY)
D13-D0
(2’s COMPLEMENT)
>1.000000V
11 1111 1111 1111
01 1111 1111 1111
+0.999878V
11 1111 1111 1111
01 1111 1111 1111
+0.999756V
11 1111 1111 1110
01 1111 1111 1110
+0.000122V
10 0000 0000 0001
00 0000 0000 0001
+0.000000V
10 0000 0000 0000
00 0000 0000 0000
–0.000122V
01 1111 1111 1111
11 1111 1111 1111
–0.000244V
01 1111 1111 1110
11 1111 1111 1110
–0.999878V
00 0000 0000 0001
10 0000 0000 0001
–1.000000V
00 0000 0000 0000
10 0000 0000 0000
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