LTC1967IMS8 Linear Technology, LTC1967IMS8 Datasheet - Page 3

• Manufacturer Part Number: LTC1967IMS8
• Description: IC CONVERTER RMS-DC PREC 8MSOP
• Manufacturer: Linear Technology

Specifications of LTC1967IMS8

• Current - Supply: 320µA
• Voltage - Supply: 5.0V
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are T
unless otherwise noted.
SYMBOL
Output Characteristics
OVR
Z
CMRRO
V
PSRRO
Frequency Response
f
f
Power Supplies
V
I
Shutdown Characteristics
I
I
I
V
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The inputs (IN1, IN2) are protected by shunt diodes to GND and
V
to less than 10mA.
Note 3: The LTC1967 output (V
overdriven, either sinking or sourcing current, to the limits stated.
Note 4: The LTC1967C/LTC1967I are guaranteed functional over the
operating temperature range of – 40 C to 85 C.
Note 5: The LTC1967C is guaranteed to meet specified performance from
0 C to 70 C. The LTC1967C is designed, characterized and expected to
meet specified performance from – 40 C to 85 C but is not tested nor QA
sampled at these temperatures. The LTC1967I is guaranteed to meet
specified performance from – 40 C to 85 C.
Note 6: High speed automatic testing cannot be performed with
C
tests have shown that the performance limits can be guaranteed with the
additional testing being performed to guarantee proper operation of all the
internal circuitry.
Note 7: High speed automatic testing cannot be performed with 60Hz
inputs. The LTC1967 is 100% tested with DC and 10kHz input signals.
Measurements with DC inputs from 50mV to 350mV are used to calculate
1P
– 3dB
S
SS
IH
IL
OUT
OMAX
+
TH
HYS
+
AVE
. If the inputs are driven beyond the rails, the current should be limited
= 10 F. The LTC1967 is 100% tested with C
PARAMETER
Output Voltage Range
Output Impedance
Output Common Mode Rejection
Maximum Differential Output Swing
Power Supply Rejection
0.1% Additional Gain Error (Note 15)
Supply Voltage
Supply Current
Supply Current
ENABLE Pin Current High
ENABLE Pin Current Low
ENABLE Threshold Voltage
ENABLE Threshold Hysteresis
3dB Frequency (Note 15)
OUT
) is high impedance and can be
AVE
= 47nF. Correlation
A
= 25 C. V
CONDITIONS
(Note 12)
(Note 13)
Accuracy = 1%, DC Input (Note 14)
(Note 9)
IN1 = 20mV, IN2 = 0V
IN1 = 200mV, IN2 = 0V
V
V
V
ENABLE
ENABLE
ENABLE
The
= 4.5V
= 4.5V
= 0.5V
+
= 5V, V
denotes specifications which apply over the full operating
OUTRTN
the four parameters: G
have shown that the performance limits can be guaranteed with the
additional testing being performed to guarantee proper operation of all
internal circuitry.
Note 8: The LTC1967 is inherently very linear. Unlike older log/antilog
circuits, its behavior is the same with DC and AC inputs, and DC inputs are
used for high speed testing.
Note 9: The power supply rejections of the LTC1967 are measured with
DC inputs from 50mV to 350mV. The change in accuracy from V
to V
Note 10: Previous generation RMS-to-DC converters required nonlinear
input stages as well as a nonlinear core. Some parts specify a “DC reversal
error,” combining the effects of input nonlinearity and input offset voltage.
The LTC1967 behavior is simpler to characterize and the input offset
voltage is the only significant source of “DC reversal error.”
Note 11: Guaranteed by design.
Note 12: The LTC1967 is a switched capacitor device and the input/output
impedance is an average impedance over many clock cycles. The input
impedance will not necessarily lead to an attenuation of the input signal
measured. Refer to the Applications Information section titled “Input
Impedance” for more information.
+
= 5.5V is divided by 1V.
= 2.5V, C
AVE
ERR
= 10 F, V
, V
OOS
, V
IN
IOS
MIN
1.0
0.9
4.5
– 1
–3
40
0
= 200mV
and linearity error. Correlation tests
– 0.1
–0.5
1.05
TYP
250
320
340
0.1
2.1
0.1
50
50
40
RMS
4
, V
LTC1967
ENABLE
1000
MAX
– 0.1
250
390
5.5
V
65
10
+
= 0.5V
+
= 4.5V
UNITS
3
MHz
1967f
kHz
V/V
V/V
k
V
V
V
V
A
A
A
A
A
V
V