that1250 THAT Corporation, that1250 Datasheet - Page 3

• Manufacturer Part Number: that1250
• Description: Low Cost, Balanced Line Receiver Ics
• Manufacturer: THAT Corporation

THAT 1250 Series
Low-cost Balanced Line Receiver ICs
performance opamps with integrated, thin-film resis-
tors. These designs take full advantage of THAT fully
complementary dielectric isolation (DI) process to
deliver excellent performance with low current
consumption. The devices are simple to apply in
many applications.
Resistor Matching, Values, and CMRR
matching of silicon-chromium (Si-Cr), thin-film,
integrated resistors to achieve a 50 dB common
mode rejection ratio and tight gain accuracy.
Parameter
Small signal bandwidth
Output Gain Error
Output Voltage Swing
Output Offset Voltage
Output Short Circuit Current
Capacitive Load
The THAT 1250-series ICs consist of high
The 1250-series devices rely upon the inherent
~
~
½v
½v
V
7
IN(CM)
IN(DIFF)
IN(DIFF)
Tel: [phone]; Fax: [phone]; Web: www.thatcorp.com
THAT Corporation; 45 Sumner Street; Milford, MA 01757-1656; USA
~
In+
In-
Electrical Characteristics (con’t)
Symbol
G
BW
V
ER-OUT
V
V
I
C
OFF
SC
O+
O-
-3dB
L
Copyright © 2008, THAT Corporation
Figure 2. THAT 1250 series test circuit
Theory of Operation
R
R
3
1
R
R
R
L
L
No
L
1253 (-3dB gain)
1256 (-6dB gain)
= 2kΩ; C
= 2kΩ; C
1250 (0dB gain)
= 2kΩ; C
Page 3 of 8
b
a
V
V
Conditions
No signal
f = 1 kHz
R
CC
EE
L
= 0 Ω
L
L
L
= 200 pF
= 200 pF
= 10 pF
trimming is performed.
monolithic construction, the R
matches within ±0.5% of the R
matching is about 50 dB CMRR for the 1256 and 52
dB for the 1250.
controlled, the actual value of any individual resistor
is not. Lot-to-lot variations of up to ±30 % are to be
expected.
stage, consider the THAT 1240-series ICs. These
parts are laser trimmed to improve the inherent
precision of our thin-film resistor process.
R
R
2
4
However, while the resistor ratios are tightly
If higher CMRR is required in a simple input
V
Min
-0.2
-10
CC
—
—
—
—
—
—
Sense
Ref
Vout
-3
2,4
V
V
12.2
Typ
±25
8.6
EE
18
CC
—
—
0
+2
-2
Document 600068 Rev 02
As a result of their
R
L
3
V
/R
Max
+0.2
+10
200
EE
—
—
—
—
—
4
+3
1
/R
ratio generally
2
ratio. 0.5%
C
L
Units
MHz
MHz
MHz
mV
mA
dB
pF
V
V
For