LT6210 Datasheet, PDF (6/16 Pages) Linear Technology – Single/Dual Programmable Supply Current, R-R Output, Current Feedback Amplifiers

LT6210/LT6211
ELECTRICAL CHARACTERISTICS _apply
over
the
specified
operating
temperature
range,
(I_S = 300µA per
otherwise specifications
Amplifier) The q
are at T_A = 25°C. For
denotes
V⁺ = 5V,
specifications which
V^– = – 5V: R_SET = 1M
to
ground, A_V = +2, R_F = R_G = 11k, R_L = 1k; For V⁺ = 3V, V^– = 0V: R_SET = 270k to V^–, A_V = +2, R_F = 9.31k, R_G = 9.31k to 1.5V, R_L = 1k to
1.5V unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
V⁺ = 5V, V^– = –5V, I_S = 300µA V⁺ = 3V, V^– = 0V, I_S = 300µA
MIN
TYP
MAX MIN
TYP
MAX UNITS
CMRR Common Mode Rejection Ratio V_IN = V⁺ – 1.2V to V^– + 1.2V
46
50
q 43
46
dB
dB
–I_CMRR Inverting Input Current
V_IN = V⁺ – 1.2V to V^– + 1.2V
0.15
±1.5
0.2
µA/V
Common Mode Rejection
q
±2
µA/V
PSRR
–I_PSRR
Power Supply Rejection Ratio
Inverting Input Current
Power Supply Rejection
V_S = ±1.5V to ±6V (Note 6)
V_S = ±1.5V to ±6V (Note 6)
q 60
q
85
60
0.4
±2.2
±4
85
dB
0.4
±2.2 µA/V
±4 µA/V
I_S
Supply Current per Amplifier
0.3
0.525
0.3
0.38 mA
q
0.6
0.43 mA
I_OUT
Maximum Output Current
R_L = 0Ω
q ±30
±10
mA
(Notes 7, 11)
R_OL
Transimpedance, ∆V_OUT/∆I_IN– V_OUT = V⁺ – 1.2V to V^– + 1.2V
300
660
65
120
kΩ
SR
Slew Rate
(Note 8)
120
170
20
V/µs
t_pd
Propagation Delay
50% V_IN to 50% V_OUT,
30
100mV_P-P, Larger of t_pd+, t_pd–
BW
–3dB Bandwidth
<1dB Peaking, A_V = 1
10
t_s
Settling Time
To 0.1% of V_FINAL, V_STEP = 2V
200
t_f, t_r
Small-Signal Rise and Fall Time 10% to 90%, V_OUT = 100mV_P-P
40
HD2
2nd Harmonic Distortion
f = 1MHz, V_OUT = 2V_P-P
– 40
HD3
3rd Harmonic Distortion
f = 1MHz, V_OUT = 2V_P-P
– 45
50
ns
7.5
MHz
300
ns
50
ns
– 45
dBc
– 45
dBc
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: As long as output current and junction temperature are kept below
the absolute maximum ratings, no damage to the part will occur.
Depending on the supply voltage, a heat sink may be required.
Note 3: The LT6210C/LT6211C is guaranteed functional over the operating
temperature range of –40°C to 85°C.
Note 4: The LT6210C/LT6211C is guaranteed to meet specified perfor-
mance from 0°C to 70°C. The LT6210C/LT6211C is designed, character-
ized and expected to meet specified performance from –40°C and 85°C
but is not tested or QA sampled at these temperatures. The LT6210I/
LT6211I is guaranteed to meet specified performance from –40°C to 85°C.
Note 5: The LT6210 with no metal connected to the V^– pin has a θ_JA of
230°C/W, however, thermal resistances vary depending upon the amount
of PC board metal attached to Pin 2 of the device. With the LT6210
mounted on a 2500mm² 3/32" FR-4 board covered with 2oz copper on
both sides and with just 20mm² of copper attached to Pin 2, θ_JA drops to
160°C/W. Thermal performance can be improved even further by using a
4-layer board or by attaching more metal area to Pin 2.
Thermal resistance of the LT6211 in MSOP-10 is specified for a 2500mm²
3/32" FR-4 board covered with 2oz copper on both sides and with 100mm²
of copper attached to Pin 5. Its performance can also be increased with
additional copper much like the LT6210.
To achieve the specified θ_JA of 43°C/W for the LT6211 DFN-10, the
exposed pad must be soldered to the PCB. In this package, θ_JA will benefit
from increased copper area attached to the exposed pad.
T_J is calculated from the ambient temperature T_A and the power dissipa-
tion P_D according to the following formula:
T_J = T_A + (P_D • θ_JA)
The maximum power dissipation can be calculated by:
P_D(MAX) = (V_S • I_S(MAX)) + (V_S/2)²/R_LOAD
Note 6: For PSRR and –I_PSRR testing, the current into the I_SET pin is
constant, maintaining a consistent LT6210/LT6211 quiescent bias point. A
graph of PSRR vs Frequency is included in the Typical Performance
Characteristics showing +PSRR and –PSRR with R_SET connecting I_SET to
ground.
Note 7: While the LT6210 and LT6211 circuitry is capable of significant
output current even beyond the levels specified, sustained short-circuit
current exceeding the Absolute Maximum Rating of ±80mA may
permanently damage the device.
Note 8: This parameter is guaranteed to meet specified performance
through design and characterization. It is not production tested.
Note 9: Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R Video Measure-
ment Set. The resolution of this equipment is 0.1% and 0.1°. Five identical
amplifier stages were cascaded giving an effective resolution of 0.02% and
0.02°.
Note 10: Input voltage range on ±5V dual supplies is guaranteed by
CMRR. On 3V single supply it is guaranteed by design and by correlation
to the ±5V input voltage range limits.
Note 11: This parameter is tested by forcing a 50mV differential voltage
between the inverting and noninverting inputs.
62101f
6