High Precision 2.5 V IC Reference Features: Laser Trimmed to High Accuracy: 2.500 V ± 0.4% 3-Terminal Device: Voltage In/Voltage Out Excellent Temperature Stability: 10 ppm/°C (AD580M, U) Low Quiescent Current: 1.5 mA max Excellent Long-Term Stability: 250 µV (25 µV/Month) Small, Hermetic IC Package: TO-52 Can MIL-STD-883 Compliant Versions Available

ADM695 - Microprocessor Supervisory Circuit

Pin Programmable Precision Voltage Reference Features: Four Programmable Output Voltages: 10.000 V, 7.500 V, 5.000 V, 2.500 V Laser Trimmed to High Accuracies No External Components Required Trimmed Temperature Coefficient: 15 ppm/°C Max, 0°C to 70°C (AD584K) 15 ppm/°C Max, -55°C to +125°C (AD584T) Zero Output Strobe Terminal Provided Two Terminal Negative Reference  Capability (5 V and above) Output Sources or Sinks Current Low Quiescent Current: 1.0 mA Max 10 mA Current Output Capability MIL-STD-883 Compliant Versions Available

Super Sequencer with Margining Control and Temperature Monitoring Features: Complete supervisory and sequencing solution for up to 10 supplies 10 supply fault detectors enable supervision of supplies to: <0.5% accuracy at all voltages at 25°C <1.0 % accuracy across all voltages and temperatures 5 selectable input attenuators allow supervision of: Supplies up to 14.4 V on VH Supplies up to 6 V on VP1 to VP4 (VPn) 10 programmable output drivers (PDO1 to PDO10): Open collector with external pull-up Push/pull output, driven to VDDCAP or VPx Open collector with weak pull-up to VDDCAP or VPx Internally charge-pumped high drive for use with external N-FET (PDO1 to PDO6 only) Sequencing engine (SE) implements state machine control of PDO outputs State changes conditional on input events Enables complex control of boards Power-up and power-down sequence control Fault event handling Interrupt generation on warnings Watchdog function can be integrated in SE Program software control of sequencing through SMBus 5 dual-function inputs, VX1 to VX5 (VXn) High impedance input to supply fault detector with thresholds between 0.573 V and 1.375 V General-purpose logic input Complete voltage margining solution for 6 voltage rails 6 voltage output, 8-bit DACs (0.300 V to 1.551 V) allow voltage adjustment via dc-to-dc converter trim/feedback node 12-bit ADC for readback of all supervised voltages Internal and external temperature sensors Reference input (REFIN) has 2 input options Driven directly from 2.048 V (±0.25%) REFOUT pin More accurate external reference for improved ADC performance Device powered by the highest of VPx, VH for improved redundancy User EEPROM: 256 bytes Industry-standard 2-wire bus interface (SMBus) Guaranteed PDO low with VH, VPx = 1.2 V Available in 40-lead, 6 mm × 6 mm LFCSP and 48-lead, 7 mm × 7 mm TQFP packages

Dual, 300 mA Fixed Output, Low Noise, High PSRR Voltage Regulator Features: Input voltage range: 2.5 V to 5.5 V Small, 8-lead, 2 mm x 2 mm LFCSP package Initial accuracy: ±1% High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz Low noise: 27 μV rms at VOUT = 1.2 V, 50 μV rms at VOUT = 2.8 V Excellent transient response Low dropout voltage: 170 mV at 300 mA load 65 μA typical ground current at no load, both LDOs enabled Overcurrent and thermal protection

Dual, 300 mA Fixed Output, Low Noise, High PSRR Voltage Regulator Features: Input voltage range: 2.5 V to 5.5 V Small, 8-lead, 2 mm x 2 mm LFCSP package Initial accuracy: ±1% High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz Low noise: 27 μV rms at VOUT = 1.2 V, 50 μV rms at VOUT = 2.8 V Excellent transient response Low dropout voltage: 170 mV at 300 mA load 65 μA typical ground current at no load, both LDOs enabled Overcurrent and thermal protection

Low Cost, Low Power, True RMS-to-DC Converter Features: Delivers true rms or average rectified value of ac waveform Fast settling at all input levels Accuracy: ±10 μV ± 0.25% of reading (B grade) Wide dynamic input range  100 μV rms to 3 V rms (8.5 V p-p) full-scale input range  Larger inputs with external scaling Wide bandwidth: 1 MHz for −3 dB (300 mV)  65 kHz for additional 1% error Zero converter dc output offset No residual switching products Specified at 300 mV rms input  Accurate conversion with crest factors up to 10  Low power: 300 μA typical at ±2.4 V  High-Z FET separately powered input buffer RIN ≥ 1012 Ω, CIN ≤ 2 pF  Precision dc output buffer  Wide power supply voltage range Dual: ±2.4 V to ±18 V; single: 4.8 V to 36 V 4 mm × 4 mm LFCSP and 8 mm × 6 mm QSOP packages ESD protected

Low Cost, Low Power, True RMS-to-DC Converter

350 mA, Low VIN, Low Quiescent Current, CMOS Linear Regulator

+2.5V Low-Power Precision Voltage Reference