19-5569; Rev 1; 2/11
TION KIT
EVALUA BLE
IL
AVA A
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
Features
S Low-Voltage Noise Density 3.6nV/√Hz
The MAX9626/MAX9627/MAX9628 are low-noise, lowdistortion, and high-bandwidth differential amplifier/ADC
drivers for use in applications from DC to 1.35GHz.
The exceptional low input-referred noise and low
distortion make these parts an excellent solution to
drive high-speed 12-bit to 16-bit pipeline ADCs. The
output common mode is set through the VOCM input
pin, thus eliminating the need for a coupling transformer
or AC-coupling capacitors. The ICs feature shutdown
mode for power savings and are offered in a 12-pin,
3mm x 3mm TQFN package for operation over a -40NC
to +125NC temperature range.
S Low Harmonic Distortion
HD2/HD3 of -102/-105dB at 10MHz
HD2/HD3 of -86/-80dB at 125MHz
S Factory Set Gain Options: 1V/V, 2V/V, 4V/V
S 1.35GHz Small-Signal Bandwidth
S Adjustable Output Common-Mode Voltage
S Differential-to-Differential or Single-Ended-toDifferential Operation
S 25µA Shutdown Current
S +2.85V to +5.25V Single-Supply Voltage
S Small, 3mm x 3mm 12-Pin TQFN Package
Ordering Information
Applications
Communication
PIN-PACKAGE
TOP
MARK
1
12 TQFN-EP*
+ABS
2
12 TQFN-EP*
+ABT
4
12 TQFN-EP*
+ABU
PART
GAIN (dB)
ATE
MAX9626ATC+
High-Performance Instrumentation
MAX9627ATC+
MAX9628ATC+
Medical Imaging
Note: All devices are specified over the -40°C to +125°C
operating temperature range.
*EP = Exposed pad.
Typical Operating Circuit
VCC
VCC
SHDNB
MAX9626
MAX9627
MAX9628
RT-
SINGLE-ENDED
INPUT
RS
RS
RT
IN-
RF
RG
OUT+
RG
IN+
OUT-
MAX19588
PIPELINE ADC
VREF
RF
RT
RT+
VOCM
VEE
DRIVING THE MAX19588
HIGH-SPEED PIPELINE ADC
________________________________________________________________ Maxim Integrated Products 1
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.
MAX9626/MAX9627/MAX9628
General Description
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to VEE)................................-0.3V to +5.5V
IN+, IN-............................................(VEE - 2.5V) to (VCC + 0.3V)
RT+, RT-..........................................(VEE - 2.5V) to (VCC + 0.3V)
RT- to IN- and RT+ to IN+..................................................... Q2V
VOCM, SHDN, OUT+, OUT-...........(VEE - 0.3V) to (VCC + 0.3V)
Output Short-Circuit Duration (OUT+ to OUT-)........................ 1s
Continuous Input Current
(any pin except VEE, VCC, OUT+, OUT-)..................... Q20mA
Continuous Power Dissipation (TA = +70NC)
12-Pin TQFN Multilayer Board (deration 16.7mW/NC
above +70NC)...........................................................1333.3mW
BJA.........................................................................60mW/NC
BJC.........................................................................11mW/NC
Operating Temperature Range......................... -40NC to +125NC
Junction Temperature......................................................+150NC
Storage Temperature Range............................. -65NC to +150NC
Lead Temperature (soldering, 10s).................................+300NC
Soldering Temperature (reflow).......................................+260NC
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.
ELECTRICAL CHARACTERISTICS
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VVOCM = VCC/2, RL = 500I (between OUT+ and OUT-), TA = -40°C to
+125°C. Typical values are at +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC SPECIFICATIONS
Supply Voltage Range
Supply Current
Power-Supply Rejection Ratio
Differential Voltage Gain
VCC
ICC
PSRR
GDIFF
Gain Error
2
VICM
2.85
SHDN = VCC
SHDN = GND
5.25
V
59
80
mA
25
50
FA
VVCOM = VCC/2,
2.85V P VCC P 5.25V,
-40NC P TA P +85NC
MAX9626
66
89
MAX9627
66
92
MAX9628
64
92
VVCOM = VCC/2,
2.85V P VCC P 5.25V,
-40NC P TA P +125NC
MAX9626
60
89
MAX9627
63
92
MAX9628
64
92
VOUT+, VOUT- = -1V to +1V
VOUT+, VOUT- = -1V to +1V
Input Offset Voltage
Common-Mode Input Voltage
Range (Note 2)
Guaranteed by PSRR
MAX9626
1
MAX9627
2
MAX9628
4
dB
V/V
MAX9626
-2
±0.2
+2
MAX9627
-2
±0.2
+2
MAX9628
-2
+2
±11
±8
Differential input,
VIN- = VIN+ = VCC/2,
TA = +25NC
MAX9626
±0.2
2
MAX9627
2
MAX9628
2
±8
Differential input,
VIN- = VIN+ = VCC/2
TA = -40°C to +125NC
MAX9626
2
±13
MAX9627
2
±10
MAX9628
2
Guaranteed by CMRR
MAX9626
-1.5
±10
+1.5
MAX9627
-0.75
+1.5
MAX9628
-0.4
+1.5
%
mV
V
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VVOCM = VCC/2, RL = 500I (between OUT+ and OUT-), TA = -40°C to
+125°C. Typical values are at +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Common-Mode Rejection Ratio
SYMBOL
CMRR
MIN
TYP
MAX9626
CONDITIONS
46
62
MAX9627
50
69
MAX9628
VOH
VOCM = VCC
VOL
VVOCM = 0V
Output Voltage Swing
Output Current
Common-Mode Input
Resistance
Differential Input Resistance
Input Termination Resistance
54
79
VCC 1
VCC 0.8
VEE +
0.65
Source: VCC - VOUT = 0.95V
100
Sink: VOUT - VEE = 0.95V
100
MAX9626
200
MAX9627
225
MAX9628
312
MAX9626
267
MAX9627
225
MAX9628
209
RT- to IN- and RT+ to IN+
64
MAX
UNITS
dB
VEE +
0.9
V
mA
I
I
I
AC SPECIFICATIONS
3dB Large-Signal Bandwidth
0.1dB Large-Signal Bandwidth
Slew Rate
AC Power-Supply Rejection
Ratio
Input Voltage Noise
Noise Figure
LSB3dB
LSB0.1dB
SR
AC PSRR
eN
NF
VOUT+ - VOUT- = 2.0VP-P
VOUT+ - VOUT- = 2.0VP-P
VOUT+ - VOUT- = 2.0VP-P
VVOCM = 1.65V, f = 10MHz
f = 10MHz
RS = 50I
MAX9626
1150
MAX9627
1350
MAX9628
1000
MAX9626
80
MAX9627
80
MAX9628
90
MAX9626
6500
MAX9627
6100
MAX9628
5500
MAX9626
64
MAX9627
65
MAX9628
62
MAX9626
5.7
MAX9627
4.3
MAX9628
3.6
MAX9626
22.2
MAX9627
19.7
MAX9628
18.1
MHz
MHz
V/Fs
dB
nV/√Hz
dB
3
MAX9626/MAX9627/MAX9628
ELECTRICAL CHARACTERISTICS (continued)
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VVOCM = VCC/2, RL = 500I (between OUT+ and OUT-), TA = -40°C to
+125°C. Typical values are at +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
f = 10MHz,
VOUT+ - VOUT= 2.0VP- P,
VCC = 5V
Harmonic Distortion
MAX9627
MAX9628
HD
f = 125MHz,
VOUT+ - VOUT= 2.0VP-P,
VCC = 5V
Capacitive Load
MAX9626
CLOAD
MAX9626
MAX9627
MAX9628
MIN
TYP
HD2
-98
HD3
-103
HD2
-102
HD3
-105
HD2
-91
HD3
-97
HD2
-80
HD3
-80
HD2
-86
HD3
-80
HD2
-80
HD3
-75
No sustained oscillation
Power-Up Time
MAX
UNITS
dBc
10
pF
2.3
Fs
VOCM INPUT PIN
Input Voltage Range
Output Common-Mode
Rejection Ratio (Note 3)
Guaranteed by VOCM CMRR test
V
52
64
0.98
0.99
1.00
V/V
Input Offset Voltage (Note 3)
12
1
±21
10
mV
Input Bias Current
Input Impedance
35
MI
Output Common-Mode Gain
(Note 3)
CMRRVOCM
VCC 1.1
1.1
GVOCM
VVOCM = 1.1V to VCC -1.1V,
TA = -40°C to +125NC
dB
FA
Output Balance Error
DVOUT = 1VPP , f = 10MHz
-77
dB
-3dB Small-Signal Bandwidth
VVOCM = 0.1VP-P
700
MHz
SHDN INPUT PIN
Input Voltage
Input Current
VIL
0.8
VIH
1.2
IIL
VSHDN = 0V
0.01
2
IIH
VSHDN = VCC
3.3
20
Turn-On Time
tON
0.6
Turn-Off Time
tOFF
0.2
Note 1: All devices are 100% production tested at TA = +25°C. Temperature limits are guaranteed by design.
Note 2: Input voltage range is a function of VOCM. See the Input Voltage Range section for details.
Note 3: Limits are guaranteed by design based on bench characterization. Testing is functional using different limits.
4
V
FA
Fs
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
-60
HD2
-70
-80
-90
HD3
-60
HD2
-70
-80
-90
HD3
-40
MAX9626
-100
-110
10,000
-50
-60
HD2
-70
-80
-90
HD3
-100
-110
10,000
100,000
-110
10,000
100,000
100,000
FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (kHz)
HARMONIC DISTORTION vs. FREQUENCY
RL = 100I, VCC = 5V
HARMONIC DISTORTION vs. FREQUENCY
RL = 500I, VCC = 5V
HARMONIC DISTORTION vs. FREQUENCY
RL = 1kI, VCC = 5V
-60
HD2
-70
-80
-90
HD3
-100
-60
HD2
-70
-80
-90
-100
HD3
-40
-50
-110
-110
10,000
MAX9627
-60
HD2
-70
-80
-90
-100
HD3
-110
-120
10,000
100,000
MAX9626 toc06
-50
MAX9627
HARMONIC DISTORTION (dBc)
-50
-40
MAX9626 toc05
MAX9627
HARMONIC DISTORTION (dBc)
MAX9626 toc04
-40
-120
10,000
100,000
100,000
FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (kHz)
HARMONIC DISTORTION vs. FREQUENCY
RL = 100I, VCC = 5V
HARMONIC DISTORTION vs. FREQUENCY
RL = 500I, VCC = 5V
HARMONIC DISTORTION vs. FREQUENCY
RL = 1kI, VCC = 5V
-50
-60
HD2
-70
-80
HD3
-90
-40
-50
MAX9628
-60
-70
-80
-90
-100
-110
-100
10,000
100,000
FREQUENCY (kHz)
-40
-50
MAX9626 toc09
MAX9628
HARMONIC DISTORTION (dBc)
MAX9626 toc07
-40
HARMONIC DISTORTION (dBc)
HARMONIC DISTIORTION (dBc)
-50
HARMONIC DISTORTION vs. FREQUENCY
RL = 1kI, VCC = 5V
MAX9626 toc03
MAX9626
-100
HARMONIC DISTIORTION (dBc)
MAX9626 toc02
-50
-40
MAX9626 toc08
HARMONIC DISTIORTION (dBc)
MAX9626
HARMONIC DISTIORTION (dBc)
MAX9626 toc01
-40
HARMONIC DISTORTION vs. FREQUENCY
RL = 500I, VCC = 5V
HARMONIC DISTIORTION (dBc)
HARMONIC DISTORTION vs. FREQUENCY
RL = 100I, VCC = 5V
MAX9628
-60
-70
HD2
-80
-90
HD3
-100
-110
-120
10,000
100,000
FREQUENCY (kHz)
-120
10,000
100,000
FREQUENCY (kHz)
5
MAX9626/MAX9627/MAX9628
Typical Operating Characteristics
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VICM = 0V, VVOCM = VCC/2, RL = 500ω, single ended. Plot applies to all
versions, unless noted otherwise.)
Typical Operating Characteristics (continued)
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VICM = 0V, VVOCM = VCC/2, RL = 500ω, single ended. Plot applies to all
versions, unless noted otherwise.)
HD2
-90
-100
-110
-65
-70
-80
-100
-110
HD3
-120
0 100 200 300 400 500 600 700 800 900 1000
LOAD (I)
HARMONIC DISTORTION vs. LOAD
f = 125MHz, VCC = 5V
HARMONIC DISTORTION vs. LOAD
f = 10MHz, VCC = 5V
HARMONIC DISTORTION vs. LOAD
f = 125MHz, VCC = 5V
-70
-80
-90
HD2
-100
MAX9628
-70
-80
HD2
-90
-100
HD3
-60
-110
0 100 200 300 400 500 600 700 800 900 1000
-70
HD3
-75
-80
-85
HD2
-90
-95
-120
-120
MAX9628
-65
HARMONIC DISTORTION (dB)
HD3
-60
MAX9626 toc14
MAX9627
HARMONIC DISTORTION (dB)
MAX9626 toc13
-100
0 100 200 300 400 500 600 700 800 900 1000
0 100 200 300 400 500 600 700 800 900 1000
LOAD (I)
LOAD (I)
HARMONIC DISTORTION
vs. DIFFERENTIAL OUTPUT SWING
f = 10MHz, VCC = 5V
HARMONIC DISTORTION
vs. DIFFERENTIAL OUTPUT SWING
f = 125MHz, VCC = 5V
HARMONIC DISTORTION vs.
DIFFERENTIAL OUTPUT SWING
f = 10MHz, VCC = 5V
-70
-80
HD2
-100
HD3
-120
-60
MAX9626
-70
-80
-90
HD2
-100
-110
HD3
-120
-60
MAX9626 toc16
MAX9626
HARMONIC DISTORTION (dB)
MAX9626 toc15b
LOAD (I)
MAX9627
HARMONIC DISTORTION (dB)
HARMONIC DISTORTION (dB)
HD2
-90
0 100 200 300 400 500 600 700 800 900 1000
-110
6
-80
LOAD (I)
-60
-110
-70
LOAD (I)
-40
-90
MAX9627
-90
0 100 200 300 400 500 600 700 800 900 1000
-60
HD2
-85
HD3
-120
-50
HD3
-75
-60
MAX9626 toc12
MAX9626
MAX9626 toc15
-80
MAX9626 toc11
-70
-60
HARMONIC DISTORTION vs. LOAD
f = 10MHz, VCC = 5V
MAX9626 toc15c
HARMONIC DISTORTION (dB)
MAX9626
HARMONIC DISTORTION (dB)
MAX9626 toc10
-60
HARMONIC DISTORTION vs. LOAD
f = 125MHz, VCC = 5V
HARMONIC DISTORTION (dB)
HARMONIC DISTORTION vs. LOAD
f = 10MHz, VCC = 5V
HARMONIC DISTORTION (dB)
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
-70
-80
-90
HD3
-100
-110
HD2
-120
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
OUTPUT SWING (V)
OUTPUT SWING (V)
OUTPUT SWING (V)
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
-90
HD2
-100
MAX9628
HD2
-90
-100
HD3
HD2
-70
-80
HD3
-90
-100
-110
-120
-120
-120
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
OUTPUT SWING (V)
OUTPUT SWING (V)
OUTPUT SWING (V)
SMALL-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 3.3V, RL = 100I, VSIG = 100mVP-P
SMALL-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 5V, RL = 100I, VSIG = 100mVP-P
SMALL-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 3.3V, RL = 100I, VSIG = 100mVP-P
6
MAX9626
8
10
MAX9626 toc21
10
MAX9626 toc20
MAX9626
8
6
6
2
2
-2
GAIN (dB)
4
2
GAIN (dB)
4
0
-2
0
-2
-4
-4
-4
-6
-6
-6
-8
-8
-8
-10
-10
-10
1M
10M
100M
1G
1M
10G
10M
100M
1G
MAX9627
8
4
0
MAX9626 toc22
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
10
10G
1M
10M
100M
1G
10G
FREQUENCY (Hz)
FREQUENCY (Hz)
SMALL-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 5V, RL = 100I, VSIG = 100mVP-P
SMALL-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 3.3V, RL = 100I, VSIG = 100mVP-P
SMALL-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 5V, RL = 100I, VSIG = 100mVP-P
10
MAX9627
8
10
6
MAX9628
8
10
6
8
2
2
GAIN (dB)
4
2
GAIN (dB)
4
-2
0
-2
0
-2
-4
-4
-4
-6
-6
-6
-8
-8
-8
-10
-10
-10
1M
10M
100M
1G
FREQUENCY (Hz)
10G
1M
10M
100M
FREQUENCY (Hz)
1G
10G
MAX9628
6
4
0
MAX9626 toc25
FREQUENCY (Hz)
MAX9626 toc23
GAIN (dB)
-80
MAX9628
-110
-110
GAIN (dB)
-70
-60
HARMONIC DISTORTION (dB)
HD3
-80
MAX9626 toc18
-70
-60
HARMONIC DISTORTION vs.
DIFFERENTIAL OUTPUT SWING
f = 125MHz, VCC = 5V
MAX9626 toc24
HARMONIC DISTORTION (dB)
MAX9627
HARMONIC DISTORTION (dB)
MAX9626 toc17
-60
HARMONIC DISTORTION vs.
DIFFERENTIAL OUTPUT SWING
f = 10MHz, VCC = 5V
MAX9626 toc19
HARMONIC DISTORTION vs.
DIFFERENTIAL OUTPUT SWING
f = 125MHz, VCC = 5V
1M
10M
100M
1G
10G
FREQUENCY (Hz)
7
MAX9626/MAX9627/MAX9628
Typical Operating Characteristics (continued)
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VICM = 0V, VVOCM = VCC/2, RL = 500ω, single ended. Plot applies to all
versions, unless noted otherwise.)
Typical Operating Characteristics (continued)
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VICM = 0V, VVOCM = VCC/2, RL = 500ω, single ended. Plot applies to all
versions, unless noted otherwise.)
2
0
-2
GAIN (dB)
2
GAIN (dB)
4
2
0
-2
0
-2
-4
-4
-4
-6
-6
-6
-8
-8
-8
-10
-10
-10
1M
10M
100M
1G
10G
1M
10M
100M
1G
1M
10G
10M
100M
1G
10G
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 5V, RL = 100I, VSIG = 2VP-P
LARGE-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 3.3V, RL = 100I, VSIG = 2VP-P
LARGE-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 5V, RL = 100I, VSIG = 2VP-P
6
MAX9628
8
10
6
6
4
2
2
2
-2
GAIN (dB)
4
GAIN (dB)
4
0
0
-2
0
-2
-4
-4
-4
-6
-6
-6
-8
-8
-8
-10
-10
-10
100M
1G
1G
1.0
MAX9626
MAX9628
0.4
2.0
1.8
1.6
1.4
0.8
MAX9628
0.4
0.2
0
0
RL (I)
MAX9626
MAX9627
10M
100M
1G
10G
SMALL-SIGNAL BANDWIDTH vs. VVOCM
1.0
0.6
1M
FREQUENCY (Hz)
1.2
0.2
0 100 200 300 400 500 600 700 800 900 1000
10G
MAX9626 toc33
MAX9627
1.2
0.6
100M
LARGE-SIGNAL BANDWIDTH
vs. RESISTIVE LOAD
1.4
0.8
10M
SMALL-SIGNAL BANDWIDTH
vs. RESISTIVE LOAD
MAX9626 toc32
1.6
1M
FREQUENCY (Hz)
2.0
1.8
10G
FREQUENCY (Hz)
1.4
SMALL SIGNAL BANDWIDTH (GHz)
10M
LARGE-SIGNAL BANDWIDTH (GHz)
1M
MAX9628
8
1.2
VCC = 5V
MAX9626 toc34
10
MAX9626 toc30
MAX9627
MAX9626 toc31
FREQUENCY (Hz)
8
GAIN (dB)
6
4
10
8
6
MAX9627
8
4
MAX9626 toc29
GAIN (dB)
6
MAX9626
8
10
MAX9626 toc27
MAX9626
8
10
MAX9626 toc26
10
LARGE-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 3.3V, RL = 100I, VSIG = 2VP-P
LARGE-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 5V, RL = 100I, VSIG = 2VP-P
MAX9626 toc28
LARGE-SIGNAL BANDWIDTH vs. FREQUENCY
VCC = 3.3V, RL = 100I, VSIG = 2VP-P
SMALL-SIGNAL BANDWIDTH (GHz)
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
VCC = 3.3V
1.0
0.8
0.6
0.4
0.2
MAX9626
0 100 200 300 400 500 600 700 800 900 1000
RL (I)
0
1.0
1.5
2.0
2.5
VVOCM (V)
3.0
3.5
4.0
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
0.6
0.4
0.2
0.2
MAX9628
0
2.0
2.5
3.0
3.5
4.0
2.0
2.5
3.0
3.5
VVOCM (V)
INPUT REFERRED VOLTAGE NOISE
vs. FREQUENCY
INPUT REFERRED VOLTAGE NOISE
vs. FREQUENCY
10
1
4.0
0.1
1
10
100
1k
100
1k
MAX9628
60
10
MAX9626
50
40
MAX9627
30
20
10
MAX9628
0
0.1
1
10
100
1k
0.1
10k 100k 1M 10M
1
10
100
1k
10k 100k 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
COMMON-MODE REJECTION RATIO
vs. FREQUENCY (MAX9626)
COMMON-MODE REJECTION RATIO
vs. FREQUENCY (MAX9627)
COMMON-MODE REJECTION RATIO
vs. FREQUENCY (MAX9628)
70
40
30
20
10
60
60
50
50
40
30
1
10
FREQUENCY (MHz)
100
1000
40
30
20
20
10
10
0
0
70
CMRR (dB)
CMRR (dB)
50
80
MAX9626 toc42
80
MAX9626 toc41
60
MAX9626 toc37
10k 100k 1M 10M
NOISE FIGURE vs. FREQUENCY
100
10k 100k 1M 10M
70
0.1
10
70
1
0.1
1
FREQUENCY (Hz)
NOISE FIGURE (dB)
100
1000
INPUT REFERRED VOLTAGE NOISE (nV/√Hz)
MAX9627
MAX9626 toc38
VVOCM (V)
1000
10
1
1.5
1.0
MAX9626 toc39
1.5
1.0
INPUT REFERRED VOLTAGE NOISE (nV/√Hz)
0.4
MAX9627
0
CMRR (dB)
0.6
100
MAX9626 toc40
0.8
MAX9626
MAX9626 toc43
1.0
VCC = 5V
VCC = 3.3V
0.8
1000
INPUT REFERRED VOLTAGE NOISE (nV/√Hz)
VCC = 3.3V
1.0
MAX9626 toc36
VCC = 5V
1.2
1.2
SMALL-SIGNAL BANDWIDTH (GHz)
1.4
MAX9626 toc35
SMALL-SIGNAL BANDWIDTH (GHz)
1.6
INPUT REFERRED VOLTAGE NOISE
vs. FREQUENCY
SMALL-SIGNAL BANDWIDTH vs. VVOCM
SMALL-SIGNAL BANDWIDTH vs. VVOCM
0
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
9
MAX9626/MAX9627/MAX9628
Typical Operating Characteristics (continued)
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VICM = 0V, VVOCM = VCC/2, RL = 500ω, single ended. Plot applies to all
versions, unless noted otherwise.)
Typical Operating Characteristics (continued)
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VICM = 0V, VVOCM = VCC/2, RL = 500ω, single ended. Plot applies to all
versions, unless noted otherwise.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (MAX9627)
90
80
90
80
70
60
60
60
50
40
PSRR (dB)
70
70
PSRR (dB)
50
40
50
40
30
30
30
20
20
20
10
10
10
0
0
0.1
1
10
0.01
1000
100
0.1
1
10
0
1000
100
0.01
0.1
1
10
1000
100
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
OFFSET VOLTAGE HISTOGRAM
(MAX9626)
OFFSET VOLTAGE HISTOGRAM
(MAX9627)
OFFSET VOLTAGE HISTOGRAM
(MAX9628)
40
OCCURANCE (%)
25
20
15
60
35
50
OCCURANCE (%)
30
45
30
25
20
15
10
10
5
MAX9626 toc47
50
MAX9626 toc45
35
MAX9626 toc46
0.01
40
30
20
10
5
0
0
0
-3
-2
-1
0
1
-4
-3
-2
-1
0
-4
1
-3
-2
-1
0
1
DIFFERENTIAL OFFSET VOLTAGE (mV)
DIFFERENTIAL OFFSET VOLTAGE (mV)
DIFFERENTIAL OFFSET VOLTAGE (mV)
GAIN ERROR HISTOGRAM
(MAX9626)
GAIN ERROR HISTOGRAM
(MAX9627)
GAIN ERROR HISTOGRAM
(MAX9628)
45
40
50
OCCURANCE (%)
35
30
25
20
15
10
60
40
30
20
MAX9626 toc50
60
MAX9626 toc48
50
50
OCCURANCE (%)
-4
MAX9626 toc49
PSRR (dB)
80
100
MAX9626 toc44a
90
OCCURANCE (%)
100
MAX9626 toc44
100
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (MAX9628)
MAX9626 toc44b
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (MAX9626)
OCCURANCE (%)
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
40
30
20
10
10
5
0
0
GAIN ERROR (%)
10
0
0
-1.0 -0.8 -0.6 -0.4 -0.2
0.2
0.4
-1.0 -0.8 -0.6 -0.4 -0.2
0
GAIN ERROR (%)
0.2
0.4
-1.0 -0.8 -0.6 -0.4 -0.2
0
GAIN ERROR (%)
0.2
0.4
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
68
58
56
54
MAX9626
MAX9628
MAX9627
62
60
58
56
54
52
3.0
3.5
4.0
4.5
5.0
-50
5.5
S22
-80
S12
-25
0
25
50
75
10
1
100
100
1000
10,000
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
FREQUENCY (MHz)
S PARAMETERS vs. FREQUENCY
(MAX9627)
S PARAMETERS vs. FREQUENCY
(MAX9628)
INTERMODULATION DISTORTION
vs. FREQUENCY (MAX9626, VCC = 5V)
-40
S22
-80
S11
-40
-60
S22
-80
S12
-100
-100
-120
-120
1
10
100
1000
FREQUENCY SPACING = 100kHz
-55
S12
IMD2, VOUT = 3VP-P
-60
IMD2, VOUT = 2VP-P
-65
-70
-75
-80
IMD3, VOUT = 3VP-P
-85
-90
IMD3, VOUT = 2VP-P
-95
1
10,000
-50
HARMONIC DISTORTION (dBc)
-20
GAIN MAGNITUDE (dB)
S11
MAX9626 toc52c
-20
-60
0
MAX9626 toc52b
0
10
100
1000
10,000
50
75
100
125
150
175
200
INTERMODULATION DISTORTION
vs. FREQUENCY (MAX9626, VCC = 3.3V)
INTERMODULATION DISTORTION
vs. FREQUENCY (MAX9627, VCC = 5V)
INTERMODULATION DISTORTION
vs. FREQUENCY (MAX9627, VCC = 3.3V)
IMD2, VOUT = 2VP-P
-60
IMD2, VOUT = 1VP-P
-65
-70
-75
IMD3, VOUT = 1VP-P
-80
IMD3, VOUT = 2VP-P
-85
FREQUENCY SPACING = 100kHz
-55
-60
IMD2, VOUT = 3VP-P
IMD2, VOUT = 2VP-P
-65
-70
-75
IMD3, VOUT = 3VP-P
-80
IMD3, VOUT = 2VP-P
75
100
125
150
FREQUENCY (MHz)
175
200
-60
IMD2, VOUT = 2VP-P
-65
IMD2, VOUT = 1VP-P
-70
-75
IMD3, VOUT = 1VP-P IMD3, VOUT = 2VP-P
-80
-90
-90
50
FREQUENCY SPACING = 100kHz
-55
-85
-85
-90
-50
HARMONIC DISTORTION (dBc)
-55
-50
HARMONIC DISTORTION (dBc)
FREQUENCY SPACING = 100kHz
MAX9626 toc52g
FREQUENCY (MHz)
MAX9626 toc52f
FREQUENCY (MHz)
MAX9626 toc52e
FREQUENCY (MHz)
-50
HARMONIC DISTORTION (dBc)
-60
-120
50
2.5
-40
-100
MAX9626
52
50
GAIN MAGNITUDE (dB)
64
S11
MAX9626 toc52d
60
-20
GAIN MAGNITUDE (dB)
66
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
MAX9628
0
MAX9626 toc52
MAX9627
70
MAX9626 toc51
64
62
S PARAMETERS vs. FREQUENCY
(MAX9626)
SUPPLY CURRENT
vs. TEMPERATURE
MAX9626 toc52a
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
50
75
100
125
150
FREQUENCY (MHz)
175
200
50
75
100
125
150
175
200
FREQUENCY (MHz)
11
MAX9626/MAX9627/MAX9628
Typical Operating Characteristics (continued)
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VICM = 0V, VVOCM = VCC/2, RL = 500ω, single ended. Plot applies to all
versions, unless noted otherwise.)
Typical Operating Characteristics (continued)
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VICM = 0V, VVOCM = VCC/2, RL = 500ω, single ended. Plot applies to all
versions, unless noted otherwise.)
IMD2, VOUT = 2VP-P
-70
-75
-80
IMD3, VOUT = 2VP-P
-85
IMD3, VOUT = 3VP-P
-60
-65
-75
-95
-90
100
125
150
175
IMD3, VOUT = 2VP-P
-80
-90
75
IMD2, VOUT = 1VP-P
-70
-85
50
IMD2, VOUT = 2VP-P
200
75
100
125
-20
-30
-40
-50
-60
-70
-80
IMD3, VOUT = 1VP-P
50
MAX9626 toc52j
-55
0
-10
OUTPUT BALANCE ERROR (dB)
-65
FREQUENCY SPACING = 100kHz
-90
150
175
1
200
10
100
1000
10,000
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
OUTPUT IMPEDANCE vs. FREQUENCY
VCOM SMALL-SIGNAL GAIN
vs. FREQUENCY
VOCM TRANSIENT RESPONSE
(MAX9626, VIN = 1.6V TO 1.7V STEP)
10
SMALL-SIGNAL GAIN (dB)
10
1
0.1
MAX9626 toc52m
15
MAX9626 toc52k
100
MAX9626 toc52l
HARMONIC DISTORTION (dBc)
IMD2, VOUT = 3VP-P
-60
-50
MAX9626 toc52i
FREQUENCY SPACING = 100kHz
-55
HARMONIC DISTORTION (dBc)
-50
OUTPUT BALANCE ERROR
vs. FREQUENCY
INTERMODULATION DISTORTION
vs. FREQUENCY (MAX9628, VCC = 3.3V)
MAX9626 toc52h
INTERMODULATION DISTORTION
vs. FREQUENCY (MAX9628, VCC = 5V)
OUTPUT IMPEDANCE (I)
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
50mV/div
5
VOCM
0
OUT_CM
-5
50mV/div
-10
0.01
1
10
100
1000
-15
1
500mV/div
1000
10,000
VOCM TRANSIENT RESPONSE
(MAX9626, VIN = 1.15V TO 2.15V STEP)
VOCM TRANSIENT RESPONSE
(MAX9627, VIN = 1.6V TO 1.7V STEP)
OUT_CM
2ns/div
VOCM TRANSIENT RESPONSE
(MAX9627, VIN = 1.15V TO 2.15V STEP)
MAX9626 toc52o
50mV/div
VOCM
50mV/div
2ns/div
12
100
FREQUENCY (MHz)
MAX9626 toc52n
500mV/div
10
FREQUENCY (MHz)
MAX9626 toc52p
500mV/div
VOCM
OUT_CM
500mV/div
2ns/div
VOCM
OUT_CM
2ns/div
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
SMALL-SIGNAL TRANSIENT RESPONSE
(MAX9626, VIN = 0 TO 100mV STEP,
VOCM = 1.65V)
VOCM TRANSIENT RESPONSE
(MAX9628, VIN = 1.15V TO 2.15V STEP)
VOCM TRANSIENT RESPONSE
(MAX9628, VIN = 1.6V TO 1.7V STEP)
MAX9626 toc52r
MAX9626 toc52q
MAX9626 toc53
INP
50mV/div
500mV/div
VOCM
50mV/div
VOCM
OUT_DIFF
50mV/div
OUT_CM
500mV/div
OUT_CM
40mV/div
2ns/div
2ns/div
2ns/div
SMALL-SIGNAL TRANSIENT RESPONSE
(MAX9627, VIN = 0 TO 50mV STEP,
VOCM = 1.65V)
SMALL-SIGNAL TRANSIENT RESPONSE
(MAX9628, VIN = 0 TO 25mV STEP,
VOCM = 1.65V)
LARGE-SIGNAL TRANSIENT RESPONSE
(MAX9626, VIN = 0 TO 1V STEP,
VOCM = 1.65V)
MAX9626 toc56
MAX9626 toc55
MAX9626 toc54
INP
INP
INP
1V/div
20mV/div
20mV/div
OUT_DIFF
OUT_DIFF
OUT_DIFF
400mV/div
40mV/div
40mV/div
2ns/div
2ns/div
2ns/div
LARGE-SIGNAL TRANSIENT RESPONSE
(MAX9627, VIN = 0 TO 500mV STEP,
VOCM = 1.65V)
LARGE-SIGNAL TRANSIENT RESPONSE
(MAX9628, VIN = 0 TO 250mV STEP,
VOCM = 1.65V)
MAX9626 toc57
MAX9626 toc58
INP
200mV/div
200mV/div
OUT_DIFF
INP
OUT_DIFF
400mV/div
400mV/div
2ns/div
2ns/div
13
MAX9626/MAX9627/MAX9628
Typical Operating Characteristics (continued)
(VCC = +3.3V, VEE = 0V, VIN- = VIN+ = 0V, SHDN = VCC, VICM = 0V, VVOCM = VCC/2, RL = 500ω, single ended. Plot applies to all
versions, unless noted otherwise.)versions, unless noted otherwise.)
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
SHDN
OUT+
TOP VIEW
OUT-
Pin Configuration
9
8
7
VEE 10
MAX9626
MAX9627
MAX9628
VEE 11
EP
1
IN+
2
3
IN-
+
VOCM
RT+ 12
6
VCC
5
VCC
4
RT-
TQFN
Pin Description
14
PIN
NAME
1
IN+
FUNCTION
2
VOCM
3
IN-
Inverting Differential Input
Noninverting Differential Input
Output Common-Mode Voltage Input
4
RT-
Termination Resistor Terminal for IN-
5, 6
VCC
Positive Supply Voltage
7
OUT+
Noninverting Differential Output
8
Active-Low Shutdown Mode Input
9
SHDN
OUT-
10, 11
VEE
Negative Supply Voltage
12
RT+
Termination Resistor Terminal for IN+
—
EP
Inverting Differential Output
Exposed Pad. Connected to VEE.
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
The MAX9626/MAX9627/MAX9628 family employs
voltage feedback to implement a differential-in to
differential-out amplifier. On-chip feedback resistors set
the gain of the amplifier. The use of on-chip resistors
not only saves cost and space, but also maximizes the
overall amplifier’s performance.
There are two feedback loops within the amplifier
circuit. The differential feedback loop employs the onchip resistors to set the differential gain. The signal is
applied differentially at the inputs and the output signal is
obtained differentially at the outputs. The common-mode
feedback loop controls the common-mode voltage at the
outputs. Both inverting and noninverting outputs exhibit
a common-mode voltage equal to the voltage applied
at VOCM input, without affecting the differential output
signal. The outputs are perfectly balanced having
signals of equal amplitude and 180N apart in-phase.
Amplifier input impedance is determined by internal
gain resistors. Therefore, source impedance does affect
the gain of the amplifier. Input termination resistors
are required to achieve source impedance match. If
preferred, the customer has the choice of using the
on-chip termination resistors. If they are used, then
the amplifier’s input impedance is 50I for singleended input configuration. The amplifier’s differential gain
accuracy is directly affected by the source impedance
value.
The ICs feature a proprietary circuit design. The use
of predistortion and dynamic distortion cancellation
greatly improves large-signal AC-performance at high
frequency.
Fixed Gain Options for
Best AC Performance
The ICs have internal gain resistors to achieve
excellent bandwidth and distortion performance. Because
the virtual ground nodes among the gain resistors and
the inputs of the amplifier are internal to the device, the
parasitic capacitors of such nodes are kept to the
minimum. This enhances the AC performance of the
device.
The ICs have three gain options with resistor values as
per Table 1, while keeping the bandwidth constant.
Table 1. Amplifier’s Gain Setting and
Internal Resistor Values
GAIN (V/V)
RG (I)
RF (I)
3dB
BANDWIDTH
(GHz)
1
200
200
1
2
150
300
1.35
4
125
500
1.15
The differential gain is given by the equation: G = RF/RG
Internal Terminations
Use the internal RT resistors in applications where the
source impedance RS is 50I and the input impedance
of the amplifier has to match with it. For a perfectly
balanced circuit driven by a differential source
impedance, the input impedance of the amplifier is given
by the simple equation RIN = 2 x RG. For single-ended
input applications, where the source impedance of 50I
connects to either input, such as in the Typical Operating
Circuit, the input impedance of the amplifier is given by
the equation:
RIN =
RG
RF
1 −
2
x
(R
+
R
)
G
F
To match the input impedance RS, the following condition must be met: RIN||RT = RS
Therefore:
RT =
RS
RS
0.5 x
(R F + 2 x R G )
1 −
RG
R G + RF
From this equation it can be inferred that RT is about 64I
for all the cases of Table 1.
15
MAX9626/MAX9627/MAX9628
Detailed Description
Table 2. Typical Gain Values When Using
the Internal Termination Resistors
(RT and RS = 50)
RG (I)
RF (I)
GAIN (V/V)
64
200
200
0.48
64
150
300
0.95
64
125
500
1.85
1.5
1.0
For single-ended to differential applications where the
source impedance is 50I, such as the case of the
Typical Application Circuit, connect an external 50I
resistor at the other input to maintain symmetry and minimize the gain error.
Applications Information
Use the following equation to determine the input common-mode range:
VIN_CM =
(VAMP − VOUT_CM )
(G + 1)
(G + 1)
x
G
where VIN_CM is the input common-mode voltage. VAMP
is the voltage at the input node of the internal amplifier.
VOUT_CM is the output common-mode voltage. G is the
gain of the device.
VIN_CM LOW
-2.0
-2.5
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
VOUT_CM (V)
Figure 1. MAX9626 Input Common-Mode Voltage vs. Output
Common-Mode Voltage of the Amplifier
2.0
GAIN = 2
1.5
1.0
VIN_CM HIGH
0.5
0
VIN_CM LOW
-0.5
Input Voltage Range
One of the typical applications is the translation of a
single-ended input signal that is referenced to ground
to a differential output signal that feeds a high-speed
pipeline analog-to-digital converter (ADC) such as the
one in the Typical Application Circuit. Because the input
signal has 0V common mode, the majority of the amplifiers would require a negative supply. The ICs allow the
input signal to be below ground even with single-supply
operation (VEE connected to GND). How far below
ground depends on the gain option. See the Electrical
Characteristics table and Figures 1, 2, and 3 for details.
0
-0.5
-1.5
VIN_CM (V)
RF x R T
R T × (R S + R G ) + RS x R G
VIN_CM HIGH
0.5
-1.0
The gain options with the internal termination resistors RT
are given by the following equation and typical numbers
are summarized in Table 2. Gain values are dependent
on actual source impedance and on-chip RT, RG, and RF
values. The latter are subject to process variation.
GAIN =
GAIN = 1
2.0
VIN_CM (V)
RT (I)
2.5
-1.0
-1.5
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
VOUT_CM (V)
Figure 2. MAX9627 Input Common-Mode Voltage vs. Output
Common-Mode Voltage of the Amplifier
2.0
GAIN = 4
1.5
1.0
VIN_CM (V)
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
VIN_CM HIGH
0.5
VIN_CM LOW
0
-0.5
-1.0
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
VOUT_CM (V)
Figure 3. MAX9628 Input Common-Mode Voltage vs. Output
Common-Mode Voltage of the Amplifier
16
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
Setting the Output Common-Mode Voltage
The ICs feature an input, VOCM, that sets the differential
output common-mode voltage. Its wide range from 1.1V
to VCC - 1.1V makes the amplifier family compatible with
most of the high-speed pipeline differential input ADCs.
While many of these ADCs accept an input commonmode around half of their supply voltage, some of them
have input common-mode range shifted toward either
ground or the positive supply.
The ICs can comfortably drive both 3.3V and 5V ADCs
that have common-mode range around half supply.
When powered with VCC of 5V or higher, the ICs can
also drive some of the popular ADCs with common-mode
range higher than 3V.
The high bandwidth of VOCM makes the amplifier's output recover quickly from load transient conditions. Such
conditions may occur when switching the ADC input
capacitor during the track-and-hold phases. The input
capacitor switching may cause a voltage glitch at the
input of the ADC, which incurs a load transient condition
for the driving amplifier.
Power-Supply Decoupling
and Layout Techniques
The ICs are high-speed devices, sensitive to the PCB
environment in which they operate. Realizing their superior
performance requires attention to the details of highspeed PCB design.
For power-supply decoupling with single-supply operation, place a large capacitor by the VCC supply node
and then place a smaller capacitor as close as possible
to the VCC pin. For 1GHz decoupling, 22pF to 100pF are
good values to use. When used with split supplies, place
relevant capacitors on the VEE supply as well.
Ground vias are critical to provide a ground return path
for high frequency signals and should be placed near
the decoupling capacitors. Place ground vias on the
exposed pad as well, along the edges and near the pins
to shorten the return path and maximize isolation. Vias
should also be placed next to the input and output signal
traces to maximize isolation. Finally, make sure that the
layer 2 ground plane is not severely broken up by signal
vias or power supply vias.
Signal routing should be short and direct to avoid
parasitic effects. For very high-frequency designs, avoid
using right angle connectors since they may introduce
a capacitive discontinuity and ultimately limit the frequency response.
Recommended Pipeline ADCs
The MAX9626/MAX9627/MAX9628 family offers excellent bandwidth and distortion performance that is in line
with the majority of high-speed and 16-bit resolution
pipeline ADCs in the market. In particular, it is recommended in combination with the MAX19586/MAX19588
family of 16-bit and 100Msps pipeline ADCs.
For lower resolution applications, the MAX9626/
MAX9627/MAX9628 family can also drive 10- to 14-bit
ADCs such as the MAX12553/MAX12554/MAX12555,
MAX12527/MAX12528/MAX12529 and MAX19505/
MAX19506/MAX19507 families.
The first requirement is a solid continuous ground plane
on the second PCB layer, preferably with no signal or
power traces. PCB layers 3 and 4 can be power-supply
routing or signal routing, but preferably they should not
be routed together.
17
MAX9626/MAX9627/MAX9628
Input Voltage Noise
The input referred voltage noise specification reported
in the Electrical Characteristics table includes both the
noise contribution of the amplifier and the contribution of
all the internal resistive elements. Because such resistive
elements change depending on the gain selection as
per Table 1, the input voltage noise specification differs
according to the gain options.
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”,
or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
18
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
LAND PATTERN NO.
12 TQFN
T1233+1
21-0136
90-0066
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
19
MAX9626/MAX9627/MAX9628
Package Information (continued)
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”,
or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
MAX9626/MAX9627/MAX9628
Low-Noise, Low-Distortion,
1.35GHz Fully Differential Amplifiers
Revision History
REVISION
NUMBER
REVISION
DATE
0
9/10
Initial release
1
2/11
Updated shutdown current value, updated Electrical Characteristics table, updated.
Internal Terminations section, and added new typical operating characteristics
DESCRIPTION
PAGES
CHANGED
—
1–7, 14
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
20
© 2011
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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