Datasheet
LMH6645, LMH6646, LMH6647
www.ti.com
SNOS970C –JUNE 2001–REVISED APRIL 2013
2.7V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for at T
J
= 25°C, V
+
= 2.7V, V
−
= 0V, V
CM
= V
O
= V
+
/2, and R
f
= 2kΩ, and R
L
= 1kΩ to V
+
/2. Boldface limits apply at the temperature extremes.
Symbol Parameter Conditions Min Typ Max Units
(1) (2) (1)
BW −3dB BW A
V
= +1, V
OUT
= 200mV
PP
, 40 55 MHz
V
CM
= 0.7V
e
n
Input-Referred Voltage Noise f = 100kHz 17
nV/√Hz
f = 1kHz 25
i
n
Input-Referred Current Noise f = 100kHz 0.75
pA/√Hz
f = 1kHz 1.20
CT Rej. Cross-Talk Rejection (LMH6646 f = 5MHz, Receiver: 47 dB
only) R
f
= R
g
= 510Ω, A
V
= +2
SR Slew Rate A
V
= −1, V
O
= 2V
PP
15 22 V/μs
See
(3)
,
(4)
T
ON
Turn-On Time 250 ns
(LMH6647 only)
T
OFF
Turn-Off Time 560 ns
(LMH6647 only)
TH
SD
Shutdown Threshold (LMH6647 I
S
≤ 50μA 1.95 2.30
V
only)
I
SD
Shutdown Pin Input Current See
(5)
−20 μA
(LMH6647 only)
V
OS
Input Offset Voltage 0V ≤ V
CM
≤ 2.7V −3 ±1 3 mV
−4 4
TC V
OS
Input Offset Average Drift See
(6)
±5 μV/°C
I
B
Input Bias Current V
CM
= 2.5V
(5)
0.40 2
2.2
μA
V
CM
= 0.5V
(5)
−0.68 −2
−2.2
I
OS
Input Offset Current 0V ≤ V
CM
≤ 2.7V 1 500 nA
R
IN
Common Mode Input Resistance 3 MΩ
C
IN
Common Mode Input 2 pF
Capacitance
CMVR Input Common-Mode Voltage CMRR ≥ 50dB −0.5 −0.3
Range −0.1
V
3.0 3.2
2.8
CMRR Common Mode Rejection Ratio V
CM
Stepped from 0V to 2.7V 46 77
dB
V
CM
Stepped from 0V to 1.55V 58 76
A
VOL
Large Signal Voltage Gain V
O
= 0.35V to 2.35V 76 87 dB
74
V
O
Output Swing R
L
= 1k to V
+
/2 2.55 2.66
V
High
R
L
= 10k to V
+
/2 2.68
Output Swing R
L
= 1k to V
+
/2 40 150
mV
Low
R
L
= 10k to V
+
/2 20
(1) All limits are guaranteed by testing or statistical analysis.
(2) Typical values represent the most likely parametric norm.
(3) Slew rate is the average of the rising and falling slew rates.
(4) Guaranteed based on characterization only.
(5) Positive current corresponds to current flowing into the device.
(6) Offset voltage average drift determined by dividing the change in V
OS
at temperature extremes into the total temperature change.
Copyright © 2001–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: LMH6645 LMH6646 LMH6647