NTE NTE870 Datasheet
NTE870
Integrated Circuit
Dual Operational Transconductance Amp
Description:
The NTE870 consists of two current controlled transconductance amplifiers each with differential inputs and a push–pull output. The two amplifiers share common supplies but otherwise operate independently. Linearizing diodes are provided at the inputs to reduce distortion and allow higher input
levels resulting in a 10dB signal–to–noise improvement referenced to 0.5 percent THD. Controlled
impedance buffers are provided which are especially designed to complement the dynamic range of
the amplifiers.
Absolute Maximum Ratings:
(TA = +25°C unless otherwise specified)
Supply Voltage, V+/V– 36V or ±18V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Input Voltage, V
Diode Bias Current, I
Amp Bias Current, I
D
ABC
Buffer Output Current, I
Power Dissipation, P
DC Input Voltage, V
D
IN
Operating Temperature Range, T
Storage Temperature Range, T
Electrical Characteristics:
Parameter Symbol Test Conditions Min Typ Max Unit
Input Offset Voltage (VOS) V
Input Offset Voltage I
VOS Including Diodes Diode Base Current, ID = 500µA – 0.5 5.0 mV
ID
o
opr
stg
(TA = +25°C, V+/V– = ±15V, I
IO
= 5µA – 0.3 5.0 mV
ABC
–20° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
= 500µA unless otherwise specified)
ABC
– 0.4 5.0 mV
570mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V+ to V–. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Offset Change 5µA ≤ I
Input Bias Current I
B
TA = –20° to +75°C – 1.0 8.0 µA
≤ 500µA – 0.1 – mV
ABC
– 0.4 5.0 µA
Electrical Characteristics (Cont’d): (TA = +25°C, V+/V– = ±15V, I
= 500µA)
ABC
Parameter Symbol Test Conditions Min Typ Max Unit
Forward Transconductance (gm) gm 6700 9600 13000 µmhos
TA = –20° to +75°C 5400 – – µmhos
gm Tracking RL = 0, I
Peak Output Current I
OP
RL = 0, I
RL = 0, I
= 5µA – 0.3 – dB
ABC
= 5µA – 5.0 – µA
ABC
= 500µA 350 500 650 µA
ABC
RL = 0, TA = –20° to +75°C 300 – – µA
Peak Output Voltage Positive V
OP
Peak Output Voltage Negative RL = ∞, 5µA ≤ I
Supply Current I
CC
RL = ∞, 5µA ≤ I
I
= 500µA, two circuit – 2.6 – mA
ABC
≤ 500µA +12 ±14.2 – V
ABC
≤ 500µA –12 –14.4 – V
ABC
VOS Sensitivity Positive SVR ∆VOS/∆V+ 76.5 94.0 – dB
VOS Sensitivity Negative ∆VOS/∆V– 76.5 94.0 – dB
Input Offset Current I
IO
– 0.1 0.6 µA
CMMR CMR 80 110 – dB
Common Mode Range V
ICM
±12.0 ±13.5 – V
Cross Talk CT 20Hz < f < 20kHz, Note 2 – –100 100 dB
Differential Input Current I
Leakage Current I
LEAKIABC
Input Resistance R
ID
I
= 0, Input = ±4V – 0.02 100 nA
ABC
= 0 – 0.2 0 nA
IN
10 26 – kΩ
Open Loop Bandwidth – 2 – MHz
Slew Rate SR – 50 – V/µs
Buffer Input Current Note 2 – 0.4 5.0 µA
Peak Buffer Output Voltage Note 2 10 – – V
Note 1. Open unless otherwise specified. The inputs to the buffers are grounded and the outputs
are open.
Note 2. R
= 5kΩ connected from the buffer output to V– and the input buffer is connected to
OUT
the transconductance amplifier output. I
= 500µA.
ABC
Loading...