Datasheet

LTC1052/LTC7652
3
1052fa
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Connecting any terminal to voltages greater than V
+
, or less than
V
–
, may cause destructive latch-up. It is recommended that no sources
operating from external supplies be applied prior to power-up of the
LTC1052/LTC7652.
Note 3: These parameters are guaranteed by design. Thermocouple effects
preclude measurement of the voltage levels in high speed automatic
testing. V
OS
is measured to a limit determined by test equipment
capability. Voltages on C
EXTA
and C
EXTB
, A
VOL
, CMRR and PSRR are
measured to insure proper operation of the nulling loop to ensure meeting
the V
OS
and V
OS
drift specifications. See Package-Induced V
OS
in the
Applications Information section.
Note 4: Output clamp not connected.
Note 5: Current noise is calculated from the formula: i
n
= (2q I
B
)
1/2
, where
q = 1.6 • 10
–19
coulomb.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= ±5V, test circuit TC1, unless otherwise noted.
LTC1052M LTC1052C/LTC7652C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 3) ±0.5 ±5 ±0.5 ±5 µV
∆V
OS
/∆Temp Average Input Offset Drift (Note 3) ● ±0.01 ±0.05 ±0.01 ±0.05 µV/°C
∆V
OS
/∆Time Long-Term Offset Voltage Stability 100 100 nV/√Month
I
OS
Input Offset Current ±30 ±90 ±30 ±90 pA
● ±2000 ±350 pA
I
B
Input Bias Current ±1 ±30 ±1 ±30 pA
● ±1000 ±175 pA
e
nP-P
Input Noise Voltage R
S
= 100Ω, DC to 10HZ, TC3 1.5 1.5 µV
P-P
R
S
= 100Ω, DC to 1HZ, TC3 0.5 0.5 µV
P-P
I
n
Input Noise Current f = 10Hz (Note 5) 0.6 0.6 fA/√Hz
CMRR Common Mode Rejection Ratio V
CM
= V
–
to 2.7V ● 120 140 120 140 dB
PSRR Power Supply Rejection Ratio V
SUPPLY
= ±2.375V to ±8V ● 120 150 120 150 dB
A
VOL
Large-Signal Voltage Gain R
L
= 10k, V
OUT
= ±4V ● 120 150 120 150 dB
V
OUT
Maximum Output Voltage Swing R
L
= 10k ● ±4.7 ±4.85 ±4.7 ±4.85 V
(Note 4) R
L
= 100k ±4.95 ±4.95 V
SR Slew Rate R
L
= 10k, C
L
= 50pF 4 4 V/µs
GBW Gain Bandwidth Product 1.2 1.2 MHz
I
S
Supply Current No Load 1.7 2.0 1.7 2.0 mA
● 3.0 3.0 mA
f
S
Internal Sampling Frequency 330 330 Hz
Clamp On Current R
L
= 100k ● 25 100 25 100 µA
Clamp Off Current –4V < V
OUT
< 4V 10 100 10 100 pA
● 21nA
Input Noise Voltage
V
S
= ±5V, TEST CIRCUIT (TC3)
DC TO 1Hz
DC TO 10Hz
5µV
0
0
5µV
10 SEC.