OPA2277U/2K5

Part: OPA277 / OPA2277 / OPA4277 — Texas Instruments

Type: High-Precision Operational Amplifier (single, dual, quad)

Description: Precision op amp with 10 μV typical offset voltage, ±0.1 μV/°C drift, 134 dB open-loop gain and 800 μA/amplifier quiescent current, operating from ±2 V to ±18 V supplies.

Operating Conditions:

• Supply voltage: 4–36 V single supply (±2 to ±18 V dual supply)
• Operating temperature: -40 to 85 °C (ambient)
• Specified with a single limit over the ±5 V (10 V) to ±15 V (30 V) supply range

Absolute Maximum Ratings:

• Input voltage: (V-) - 0.7 V to (V+) + 0.7 V (limit input current to 10 mA if signals swing beyond this)
• Output short circuit: continuous (to ground, one amplifier per package)
• Max junction temperature: 150 °C
• Storage temperature: -55 to 125 °C

Key Specs:

• Input offset voltage: 10 μV typical (±20 μV maximum initial)
• Offset drift: ±0.1 μV/°C
• Open-loop gain: 134 dB
• Common-mode rejection: 140 dB
• Power-supply rejection: 130 dB
• Input bias current: 1 nA maximum
• Quiescent current: 800 μA per amplifier
• ESD: HBM ±2000 V, CDM ±500 V

Features:

• Ultra-low offset voltage and drift
• High open-loop gain, CMRR and PSRR
• Low bias current
• Wide supply range (±2 V to ±18 V)
• Unity-gain stable, free from phase inversion
• Offset trim pins on the single version (OPA277)
• Replaces OP-07, OP-77 and OP-177
• Independent circuitry in dual and quad versions for low crosstalk

Applications:

• Analog input module
• Weigh scale
• Temperature transmitter
• Pressure transmitter
• Data acquisition (DAQ)
• Lab and field instrumentation
• Battery test

Package:

• OPA277, OPA2277: D (SOIC-8, 3.91 × 4.90 mm), DRM (VSON-8, 4.00 × 4.00 mm), P (PDIP-8, 6.35 × 9.81 mm)
• OPA4277: D (SOIC-14, 3.91 × 8.65 mm), P (PDIP-14, 6.35 × 19.30 mm)

• Ultra-low offset voltage: 10 μV
• Ultra-low drift: ±0.1 μV/°C
• High open-loop gain: 134 dB
• High common-mode rejection: 140 dB
• High power-supply rejection: 130 dB
• Low bias current: 1-nA maximum
• Wide supply range: ±2 V to ±18 V
• Low quiescent current: 800 μA/amplifier
• Single, dual, and quad versions
• Replaces OP-07, OP-77, and OP-177
• For similar performance with ±40-V overvoltage protection, see the OPA2206

• Analog input module
• Weigh scale
• Temperature transmitter
• Pressure transmitter
• Data acquisition (DAQ)
• Lab and field instrumentation
• Battery test

50nV/div

0.1-Hz to 10-Hz Noise

Figure 5-1. OPA277 P Package, 8-Pin PDIP and D Package, 8-Pin SOIC (Top View)

Figure 5-2. OPA277 DRM Package, 8-Pin VSON (Top View)

Table 5-1. Pin Functions: OPA277

Figure 5-3. OPA2277 P Package, 8-Pin PDIP and D Package, 8-Pin SOIC (Top View)

Table 5-1. Pin Functions: OPA277

Figure 5-4. OPA2277 DRM Package, 8-Pin VSON (Top View)

Figure 5-3. OPA2277 P Package, 8-Pin PDIP and D Package, 8-Pin SOIC (Top View)

at T A = 25°C, VS = 10 V to 30 V, V CM = V OUT = VS / 2, and R L = 2 kΩ connected to VS / 2 (unless otherwise noted)

at T A = 25°C, VS = 10 V to 30 V, V CM = V OUT = VS / 2, and R L = 2 kΩ connected to VS / 2 (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted) (1)

• (2) Limit input signals that can swing more than 0.7 V beyond the supply rails to 10 mA or less.
• (3) Short-circuit to ground, one amplifier per package.

over operating free-air temperature range (unless otherwise noted)

The OPAx277 family offers outstanding dc precision and ac performance. These devices operate up to 36-V supply rails and offer ultralow offset voltage and offset voltage drift, as well as 1-MHz bandwidth and high capacitive load drive. These features make the OPAx277 a robust, high-performance operational amplifier for high-voltage industrial applications.