求助，关于ADA4254输出运放电源电压问题

还需要看你的输入电路和输出负载电路，如果负载过大也会过热。

所以最好把你的完整电路show出来，并把故障描述清楚，在什么样的条件下会出现过热。这样才好做故障诊断。

AVSS接-2.5v？仔细看数据手册要求AVSS和DVSS同电位！
POWER SUPPLIES
The ADA4254 has three supply voltage domains: the high
voltage analog input amplifier supply, the low voltage analog
output amplifier supply, and the low voltage digital supply.
The high voltage analog supplies, VDDH and VSSH, power the
input section of the ADA4254. VSSH is connected to the substrate
of the ADA4254. Therefore, VSSH must be connected to the
most negative supply voltage in the circuit and VSSH must not
exceed AVSS. It is recommended to use a Schottky diode to
clamp VSSH to AVSS. The Schottky diode must have a forward
bias voltage of 0.3 V or lower at 1 mA and withstand −28 V of
reverse voltage. The ADA4254 monitors the VDDH and VSSH
supplies to detect if the VDDH or VSSH drops below 8 V and
sets the POR_HV flag. VDDH and VSSH must be decoupled
with 0.1 μF and 1 μF to ground, as close to the pins as possible.
The low voltage analog output amplifier supply, AVDD and
AVSS, powers the output amplifier of the ADA4254. AVSS
must be within VSSH − 0.3 V to VSSH + 30 V and VDDH – 30
V to VDDH + 0.3 V. AVDD − AVSS is typically a 5 V single
supply, compatible with most high precision ADCs. Use 0.1 μF
and 10 μF decoupling capacitors between AVDD and AVSS as
close as possible to the AVDD and AVSS supply pins.
The digital supplies, DVDD and DVSS, power the digital circuitry
inside the ADA4254. DVSS must be the same potential as AVSS.

AVSS和DVSS必须同电位！

AVSS和DVSS必须同电位！！

AVSS和DVSS必须同电位！！