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LT6604IUFF-15#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LT6604-15
1
660415fb
TYPICAL APPLICATION
DESCRIPTION
Dual Very Low Noise,
Differential Amplifi er and
15MHz Lowpass Filter
The LT
®
6604-15 consists of two matched, fully differential
amplifi ers, each with a 4th order, 15MHz lowpass fi lter. The
fi xed frequency lowpass fi lter approximates a Chebyshev
response. By integrating a fi lter and a differential ampli-
fi er, distortion and noise are made exceptionally low. At
unity gain, the measured in band signal-to-noise ratio is
an impressive 76dB. At higher gains, the input referred
noise decreases, allowing the part to process smaller
input differential signals without signifi cantly degrading
the signal-to-noise ratio.
Gain and phase are highly matched between the two chan-
nels. Gain for each channel is independently programmed
using two external resistors. The LT6604-15 enables level
shifting by providing an adjustable output common mode
voltage, making it ideal for directly interfacing to ADCs.
The LT6604-15 is fully specifi ed for 3V operation. The
differential design enables outstanding performance at
a 2V
P-P
signal level for a single 3V supply. See the back
page of this datasheet for a complete list of related single
and dual differential amplifi ers with integrated 2.5MHz to
20MHz lowpass fi lters.
Channel to Channel Gain Matching
FEATURES
APPLICATIONS
n
Dual Differential Amplifi er with 15MHz Lowpass
Filters
4th Order Filters
Approximates Chebyshev Response
Guaranteed Phase and Gain Matching
Resistor-Programmable Differential Gain
n
76dB Signal-to-Noise (3V Supply, 2V
P-P
Output)
n
Low Distortion, 2V
P-P
, 800 Load, V
S
= 3V
1MHz: 86dBc 2nd, 90dBc 3rd
10MHz: 63dBc 2nd, 69dBc 3rd
n
Specifi ed for Operation with 3V, 5V and ±5V Supplies
n
Fully Differential Inputs and Outputs
n
Adjustable Output Common Mode Voltage
n
Small 4mm × 7mm × 0.75mm QFN Package
n
Dual Differential ADC Driver Plus Filter
n
Single-Ended to Differential Converter
n
Matched, Dual, Differential Filter Stage
n
Common Mode Translation of Differential Signals
n
High Speed ADC Antialiasing and DAC Smoothing in
Wireless Infrastructure or Networking Applications
n
High Speed Test and Measurement Equipment
n
Medical Imaging
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
536
536
3V
3V
+
–
+
–
660415 TA01
+
–
DOUTAIN
LT6604-15 LTC22xx
+
–
536
536
3V
–OUTA
+OUTA
–OUTB
+OUTB
+INA
V
MIDB
V
MIDA
+INB
V
OCMA
V
OCMB
–INA
–INB
V
–
+
–
+
–
+
–
DOUTAIN
+
–
50
50
DUAL ADC
V
+
A
V
+
BV
+
B
50
50
18pF
18pF
0.01µF
0.01µF
–0.25
12
16
0.15
660415 TA01b
8
4
10
14
6
2
0
–0.2
–0.1–0.15
0.05–0.05 0.1 0.2
0
0.25
GAIN MATCH (dB)
50 TYPICAL UNITS
T
A
= 25°C
GAIN = 1
f
IN
= 15MHz
LT6604-15
2
660415fb
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage .................................................11V
Operating Temperature Range (Note 6).... –40°C to 85°C
Specifi ed Temperature Range (Note 7) .... –40°C to 85°C
Junction Temperature ........................................... 150°C
Storage Temperature Range ................... –65°C to 150°C
Input Current
+IN, –IN, V
OCM
, V
MID
(Note 8) .........................±10mA
Lead Temperature (Soldering, 10 sec) .................. 300°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
Filter Gain Either Channel, V
S
= 3V V
IN
= 2V
P-P
, f
IN
= DC to 260kHz
V
IN
= 2V
P-P
, f
IN
=1.5MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 7.5MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 12MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 15MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 45MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 75MHz (Gain Relative to 260kHz)
l
l
l
l
l
l
–0.5
–0.1
–0.3
–0.3
–0.7
0.1
0
0
0.2
0
–29
–46
0.5
0.1
0.4
1.0
1.0
–25
dB
dB
dB
dB
dB
dB
dB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LT6604CUFF-15#PBF LT6604CUFF-15#TRPBF 60415 34-Lead (4mm × 7mm) Plastic QFN 0°C to 70°C
LT6604IUFF-15#PBF LT6604IUFF-15#TRPBF 60415 34-Lead (4mm × 7mm) Plastic QFN –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
The l denotes specifi cations that apply over the full operating temperature
range, otherwise specifi cations are at T
A
= 25°C. Unless otherwise specifi ed V
S
= 5V (V
+
= 5V, V
–
= 0V), R
IN
= 536Ω, and R
LOAD
= 1k.
31 V
–
32 V
–
33 NC
34 V
MIDA
V
+
B 17
NC 16
NC 15
V
OCMB
14
30 NC
29 –OUTA
28 NC
27 +OUTA
26 NC
25 V
+
A
24 V
–
23 NC
22 NC
21 –OUTB
20 NC
19 +OUTB
18 NC
NC 1
+INA 2
NC 3
–INA 4
NC 5
V
OCMA
6
V
–
7
V
MIDB
8
NC 9
+INB 10
NC 11
–INB 12
NC 13
TOP VIEW
UFF PACKAGE
34-LEAD (4mm × 7mm) PLASTIC QFN
35
T
JMAX
= 150°C, θ
JA
= 34°C/W, θ
JC
= 2.7°C/W
EXPOSED PAD (PIN 35) IS V
–
, MUST BE SOLDERED TO PCB
(Note 1)
LT6604-15
3
660415fb
ELECTRICAL CHARACTERISTICS
The l denotes specifi cations that apply over the full operating temperature
range, otherwise specifi cations are at T
A
= 25°C. Unless otherwise specifi ed V
S
= 5V (V
+
= 5V, V
–
= 0V), R
IN
= 536Ω, and R
LOAD
= 1k.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Matching of Filter Gain, V
S
= 3V V
IN
= 2V
P-P
, f
IN
= DC to 260kHz
V
IN
= 2V
P-P
, f
IN
= 1.5MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 7.5MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 12MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 15MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 45MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 75MHz (Gain Relative to 260kHz)
l
l
l
l
l
l
0.05
0.01
0.02
0.03
0.06
0.13
0.15
0.5
0.1
0.3
0.4
0.6
1.5
2.8
dB
dB
dB
dB
dB
dB
dB
Matching of Filter Phase, V
S
= 3V V
IN
= 2V
P-P
, f
IN
= 1.5MHz
V
IN
= 2V
P-P
, f
IN
= 7.5MHz
V
IN
= 2V
P-P
, f
IN
= 12MHz
l
l
l
0.6
0.8
0.9
1
3
4
deg
deg
deg
Filter Gain Either Channel, V
S
= 5V V
IN
= 2V
P-P
, f
IN
= DC to 260kHz
V
IN
= 2V
P-P
, f
IN
=1.5MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 7.5MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 12MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 15MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 45MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 75MHz (Gain Relative to 260kHz)
l
l
l
l
l
l
–0.5
–0.1
–0.4
–0.4
–0.8
0
0
0
0.1
0
–29
–46
0.5
0.1
0.3
0.9
0.9
–25
dB
dB
dB
dB
dB
dB
dB
Matching of Filter Gain, V
S
= 5V V
IN
= 2V
P-P
, f
IN
= DC to 260kHz
V
IN
= 2V
P-P
, f
IN
=1.5MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 7.5MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 12MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 15MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 45MHz (Gain Relative to 260kHz)
V
IN
= 2V
P-P
, f
IN
= 75MHz (Gain Relative to 260kHz)
l
l
l
l
l
l
0.05
0.01
0.02
0.03
0.06
0.13
0.15
0.5
0.1
0.3
0.4
0.6
1.5
2.8
dB
dB
dB
dB
dB
dB
dB
Matching of Filter Phase, V
S
= 5V V
IN
= 2V
P-P
, f
IN
= 1.5MHz
V
IN
= 2V
P-P
, f
IN
= 7.5MHz
V
IN
= 2V
P-P
, f
IN
= 12MHz
l
l
l
0.6
0.8
0.9
1
3
4
deg
deg
deg
Filter Gain Either Channel, V
S
= ±5V V
IN
= 2V
P-P
, f
IN
= DC to 260kHz –0.6 –0.1 0.4 dB
Filter Gain, R
IN
= 133Ω V
IN
= 0.5V
P-P
, f
IN
= DC to 260kHz V
S
= 3V
V
S
= 5V
V
S
= ±5V
11.5
11.5
11.4
12.0
12.0
11.9
12.5
12.5
12.4
dB
dB
dB
Filter Gain Temperature Coeffi cient (Note 2) f
IN
= 250kHz, V
IN
= 2V
P-P
780 ppm/°C
Noise Noise BW = 10kHz to 15MHz, R
IN
= 536Ω 109 µV
RMS
Distortion (Note 4) 1MHz, 2V
P-P
, R
L
= 800Ω, V
S
= 3V 2nd Harmonic
3rd Harmonic
86
90
dBc
dBc
10MHz, 2V
P-P
, R
L
= 800Ω, V
S
= 3V 2nd Harmonic
3rd Harmonic
63
69
dBc
dBc
Channel Separation (Note 9) 1MHz, 2V
P-P
, R
L
= 800Ω –117 dB
10MHz, 2V
P-P
, R
L
= 800Ω –102 dB
Differential Output Swing Measured Between +OUT and –OUT, V
OCM
shorted to V
MID
V
S
= 5V
V
S
= 3V
l
l
3.80
3.75
4.75
4.50
V
P-P_DIFF
V
P-P_DIFF
Input Bias Current Average of IN
+
and IN
–
l
–90 –35 µA
Input Referred Differential Offset R
IN
= 536Ω V
S
= 3V
V
S
= 5V
V
S
= ±5V
l
l
l
5
10
10
25
30
35
mV
mV
mV
R
IN
= 133Ω V
S
= 3V
V
S
= 5V
V
S
= ±5V
l
l
l
5
5
5
15
17
20
mV
mV
mV
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LT6604IUFF-15#PBF

Mfr. #:
Buy LT6604IUFF-15#PBF
Manufacturer:
Analog Devices Inc.
Description:
Differential Amplifiers Dual Differential Amplifier and 15MHz Lowpass Filter
Lifecycle:
New from this manufacturer.
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