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OPA858IDSGT

5.5 GHz Gain Bandwidth Product, Decompensated Transimpedance Amplifier with FET Input

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

OPA858IDSGT
Datasheet:

OPA858IDSGT Datasheet (PDF)
Amplifier Type:

General Purpose
Number of Circuits:

1
Output Type:

Single-Ended
Slew Rate:

2000V/µs
EDA/CAD Models:

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OPA858IDSGT General Description

The OPA858 is a wideband, low-noise, operational amplifier with CMOS inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 5.5-GHz gain bandwidth product (GBWP) enables applications requiring high closed-loop bandwidths at transimpedance gains in the tens to hundreds of kΩs range.

The graph below demonstrates the bandwidth and noise performance of the OPA858 as a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated over a bandwidth range extending from DC to the calculated f_-3dB frequency on the left-hand scale. The OPA858 package features a feedback pin (FB) that simplifies the feedback network connection between the input and the output.

The OPA858 is optimized for use in optical Time-of-Flight (ToF) systems like the one shown in the figure below where the OPA858 is used with the TDC7201 time-to-digital converter. The OPA858 can be used in high-resolution LIDAR systems with a high-speed analog-to-digital converter (ADC) and a differential output amplifier like the THS4541 or LMH5401 to drive the ADC.

Key Features

High Gain Bandwidth Product: 5.5 GHz
Decompensated, Gain ≥ 7 V/V (Stable)
Ultra-Low Bias Current MOSFET Inputs: 10 pA
Low Input Voltage Noise: 2.5 nV/√Hz
Slew rate: 2000 V/µs
Low Input Capacitance:
- Common-Mode: 0.6 pF
- Differential: 0.2 pF
Wide Input Common-Mode Range:
- 1.4 V from Positive Supply
- Includes Negative Supply
2.5 V_PP Output Swing in TIA Configuration
Supply Voltage Range: 3.3 V to 5.25 V
Quiescent Current: 20.5 mA
Available in 8-Pin WSON Package
Temperature Range: –40 to +125°C

Specifications

Category	Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps	Series	-
Amplifier Type	General Purpose	Number of Circuits	1
Output Type	Single-Ended	Slew Rate	2000V/µs
Gain Bandwidth Product	5.5 GHz	-3db Bandwidth	1.2 GHz
Current - Input Bias	0.4 pA	Voltage - Input Offset	800 µV
Current - Supply	21mA	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	Mounting Type	Surface Mount
Base Product Number	OPA858	Architecture	FET / CMOS Input, Voltage FB
Number of channels	1	Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)	3.3
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)	5.25	GBW (typ) (MHz)	5500
BW at Acl (MHz)	1200	Acl, min spec gain (V/V)	7
Slew rate (typ) (V/µs)	2000	Vn at flatband (typ) (nV√Hz)	2.5
Vn at 1 kHz (typ) (nV√Hz)	25	Iq per channel (typ) (mA)	20.5
Vos (offset voltage at 25°C) (max) (mV)	2.5	Rail-to-rail	No
Features	Decompensated, Shutdown	Rating	Catalog
Operating temperature range (°C)	-40 to 125	CMRR (typ) (dB)	80
Input bias current (max) (pA)	5	Offset drift (typ) (µV/°C)	1.5
Iout (typ) (mA)	80	2nd harmonic (dBc)	80
3rd harmonic (dBc)	86	Frequency of harmonic distortion measurement (MHz)	10
feature-type	Low Noise Amplifier	feature-number-of-channels-per-chip	1
feature-rail-to-rail		feature-process-technology	BiCMOS
feature-output-type		feature-maximum-input-offset-voltage-mv	5@5V
feature-maximum-supply-current-ma		feature-maximum-input-offset-current-ua	0.000005@5V
feature-maximum-input-bias-current-ua	0.000005@5V	feature-maximum-power-dissipation-mw
feature-typical-slew-rate-v-us	2000@5V	feature-typical-gain-bandwidth-product-mhz	5500
feature-shut-down-support	No	feature-packaging	Tape and Reel
feature-rad-hard		feature-pin-count	8
feature-cecc-qualified		feature-esd-protection
feature-escc-qualified		feature-military	No
feature-aec-qualified	No	feature-aec-qualified-number
feature-auto-motive	No	feature-p-pap	No
feature-eccn-code	EAR99	feature-svhc	No
feature-svhc-exceeds-threshold	No