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OPA855QDSGRQ1

Automotive 8-GHz gain bandwidth, decompensated transimpedance amplifier with bipolar input

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

OPA855QDSGRQ1
Datasheet:

OPA855QDSGRQ1 Datasheet (PDF)
Series:

Automotive, AEC-Q100
Amplifier Type:

General Purpose
Number of Circuits:

1
Output Type:

Rail-to-Rail
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OPA855QDSGRQ1 General Description

The OPA855-Q1 is a wideband, low-noise operational amplifier with bipolar inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 8-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths at transimpedance gains of up to tens of kΩs.

The following graph shows the bandwidth and noise performance of the OPA855-Q1 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated along a bandwidth range extending from DC to the calculated frequency (f) on the left scale. The OPA855-Q1 package has a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA855-Q1 is optimized to operate in optical time-of-flight (ToF) systems where the OPA855-Q1 is used with time-to-digital converters, such as the TDC7201. Use the OPA855-Q1 to drive a high-speed analog-to-digital converter (ADC) in high-resolution LIDAR systems with a differential output amplifier, such as the THS4541-Q1.

Key Features

AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, T_A
High gain bandwidth product: 8 GHz
Decompensated, gain ≥ 7 V/V (stable)
Low input voltage noise: 0.98 nV/√Hz
Slew rate: 2750 V/µs
Low Input capacitance:
- Common-mode: 0.6 pF
- Differential: 0.2 pF
Wide input common-mode range:
- 0.4 V from positive supply
- 1.1 V from negative supply
3 V_PP total output swing
Supply voltage range: 3.3 V to 5.25 V
Quiescent current: 17.8 mA
Package: 8-pin WSON
Temperature range: –40°C to +125°C

Specifications

Category	Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps	Series	Automotive, AEC-Q100
Amplifier Type	General Purpose	Number of Circuits	1
Output Type	Rail-to-Rail	Slew Rate	2750V/µs
Gain Bandwidth Product	8 GHz	-3db Bandwidth	2.5 GHz
Current - Input Bias	12 µA	Voltage - Input Offset	200 mV
Current - Supply	17.8mA	Current - Output / Channel	105 mA
Voltage - Supply Span (Min)	3.3 V	Voltage - Supply Span (Max)	5.25 V
Operating Temperature	-40°C ~ 125°C (TA)	Mounting Type	Surface Mount