Document
TS271C,I,M
PROGRAMMABLE CMOS SINGLE OPERATIONAL AMPLIFIERS
. . . . . . .
OFFSET NULL CAPABILITY (by external compensation) DYNAMIC CHARACTERISTICS ADJUSTABLE BY ISET CONSUMPTION CURRENT AND DYNAMIC PARAMETERS ARE STABLE REGARDING THE VOLTAGE POWER SUPPLY VARIATIONS OUTPUT VOLTAGE CAN SWING TO GROUND VERY LARGE ISET RANGE STABLE AND LOW OFFSET VOLTAGE THREE INPUT OFFSET VOLTAGE SELECTIONS
N DIP8 (Plastic Package)
D SO8 (Plastic Micropackage)
DESCRIPTION The TS271 is a low cost, low power single operational amplifier designed to operate with single or
ORDER CODES
Part Number TS271C/AC/BC TS271I/AI/BI TS271M/AM/BM Example : TS271ACN Temperature Range 0oC, +70oC -40oC, +125oC -55 C, +125 C
o o
Package N
q q q
D
q q q
dual supplies. This operational amplifier uses the SGS-THOMSON silicon gate CMOS process giving it an excellent consumption-speed ratio. This amplifier is ideally suited for low consumption applications. The power supply is externally programmable with a resistor connectedbetween pins 8 and 4. It allows to choose the best consumption-speed ratio and supply current can be minimized according to the required speed. This device is specified for the following ISET current values : 1.5µA, 25µA, 130µA. This CMOS amplifier offers very high input impedance and extremely low input currents. The major advantage versus JFET devices is the very low input currents drift with temperature (see figure 3).
PIN CONNECTIONS (top view)
1 2 3 4 +
8 7 6 5
1 - Offset Null 1 2 - Inverting Input 3 - Non-inverting Input 4 - V CC 5 - Offset Null 2 6 - Output 7 -V + CC 8 -I
SET
October 1997
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TS271C,I,M
BLOCK DIAGRAM
VCC
Output stage Input differential Second stage Output
VCC
Offset null
E
Iset
Input
E Input
MAXIMUM RATINGS
Symbol VCC+ Vid Vi IO Iin Toper Supply Voltage - (note 1) Differential Input Voltage - (note 2) Input Voltage - (note 3) Output Current for VCC+ ≥ 15V Input Current Operating Free-Air Temperature Range TS271C/AC/BC TS271I/AI/BI TS271M/AM/BM Tstg Storage Temperature Range 0 to +70 -40 to +125 -55 to +125 -65 to +150
o
Parameter
Value 18 ±18 -0.3 to 18 ±30 ±5
Unit V V V mA mA
o
C
C
Notes : 1. All voltage values, except differential voltage, are with respect to network ground terminal. 2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal. 3. The magnitude of the input and the output voltages must never exceed the magnitude of the positive supply voltage.
OPERATING CONDITIONS
Symbol VCC
+
Parameter Supply Voltage Common Mode Input Voltage Range
Value 3 to 16 0 to VCC - 1.5
+
Unit V V
Vicm
2/15
V CC
SCHEMATIC DIAGRAM
T27 T10 T5 T6
T26
T28 T8 T1 R1 T11 T12 T2 Input +
T15
Input C1 T7
Set Current C2 Output
T3
T4
T16 T13 T9
T14
T29
Offset Null 1
Offset Null 2
V CC
TS271C,I,M
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TS271C,I,M
OFFSET VOLTAGE NULL CIRCUIT RESISTOR BIASING
VCC
VCC
5
1 8
25kΩ
VCC
R set
VO
VO
R set
R set
VCC VCC
OFFSET COMPENSATION GUARANTEED FOR TS271BCX (ISET > 25µA),TS271ACX (ISET> 90µA)
R SET CONNECTED TO GROUND
RSET CONNECTED TO VCC- (R SET VALUE : SEE Fig.1)
Figure 1 :
RSET Connected to VCC-.
V V R
set
CC CC
= +3V = +5V
V V
CC CC
= +10V = +16V
10M
Ω
1M Ω
100k
Ω Ω 0. 1µA
10k
1 µA
1 0µ A
1 0 0µA
I set
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TS271C,I,M
ELECTRICAL CHARACTERISTICS FOR ISET = 1.5µA VCC+ = +10V, VCC- = 0V, Tamb = 25oC (unless otherwise specified)
Symbol Vio Parameter Input Offset Voltage VO = 1.4V, V ic = 0V TS271C/I/M TS271AC/AI/AM TS271BC/BI/BM Tmin. ≤ Tamb ≤ Tmax. TS271C/I/M TS271AC/AI/AM TS271BC/BI/BM DVio Iio Input Offset Voltage Drift Input Offset Current - (note 1) Vic = 5V, Vo = 5V Tmin. ≤ Tamb ≤ Tmax. Input Bias Current - (note 1) Vic = 5V, Vo = 5V Tmin. ≤ Tamb ≤ Tmax. High Level Output Voltage Vid = 100mV, R L = 1M Ω Tmin. ≤ Tamb ≤ Tmax. Low Level Output Voltage (Vid = -100mV) Large Signal Voltage Gain Vo = 1V to 6V, R L = 1MΩ, Vic = 5V Tmin. ≤ Tamb ≤ Tmax. Gain Bandwidth Product (Av = 40dB, RL = 1MΩ, CL = 100pF, fin = 10kHz) Common Mode Rejection Ratio Vo = 1.4V, Vic = 1V to 7.4V Supply Voltage Rejection Ratio + VCC = 5V to 10V ,Vo = 1.4V Supply Current Av = 1, no load, Vo = 5V Tmin. ≤ Tamb ≤ Tmax. Output Short Circuit Current Vid = 100mV, Vo = 0V Output Sink Current Vid = -100mV, Vo = VCC Slew-Rate at Unity Gain R L = 1MΩ, CL= 100pF, Vi = 3 to 7V Phase Margin at Unity Gain Av = 40dB, RL = 1MΩ C L= 10pF C L= 100pF Overshoot Factor C L = 10pF C L = 100pF en Equivalent Input Noise Voltage f = 1kHz, RS = 100Ω 40 70 68 40 70 68 nV √ Hz 60 60 30 20 100 8.8 8.7 0.7 1 100 1 150 9 50 30 20 100 MHz 0.1 80 80 10 15 17 60 60 0.1 dB 80 dB 80 10 15 18 µA 8.8 8.6 9 50 mV V/mV 1 300 V TS271C/AC/BC Min. Typ. 1.1 0.9 0.25 Max. 10 5 2 12 6.5 3 0.7 1 200 pA TS271I/AI/BI TS271M/AM/BM Min. Typ. 1.1 0.9 0.25 Max. mV 10 5 2 12 6.5 3.5 µV/oC pA Unit
Iib
VOH
VOL Avd
GBP CMR SVR ICC
Io Isink SR ∅m
mA 60 45 0.04 60 mA 45 V/µs 0.04 Degrees 35 10 35 10 %
Kov
Note : 1. Maximum values including unavoidable inaccuracies of t.