Small Reinforced Isolated Modulator With ±250mV Input and CMOS Interface - AMC1306M25


Small Reinforced Isolated Modulator With ±250mV Input and CMOS Interface



The AMC1306 device is a precision, delta-sigma (ΔΣ) modulator with the output separated from the input circuitry by a capacitive double isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced isolation of up to 8000 VPEAK according to the DIN V VDE V 0884-10 and UL1577 standards. Used in conjunction with isolated power supplies, this isolated modulator separates parts of the system that operate on different common-mode voltage levels and protects lower-voltage parts from damage.

The input of the AMC1306 is optimized for direct connection to shunt resistors or other low voltage-level signal sources. The unique low input voltage range of the ±50-mV device allows significant reduction of the power dissipation through the shunt and supports excellent ac and dc performance. The output bitstream of the AMC1306 is Manchester coded (AMC1306Ex) or uncoded (AMC1306Mx), depending on the derivate. By using an integrated digital filter (such as those in the TMS320F2807x or TMS320F2837x microcontroller families) to decimate the bitstream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB at a data rate of 78 kSPS.

The bitstream output of the Manchester coded AMC1306Ex versions support single-wire data and clock transfer without having to consider the setup and hold time requirements of the receiving device.


  • Pin-Compatible Family Optimized for Shunt-Resistor-Based Current Measurements:
    • ±50-mV or ±250-mV Input Voltage Ranges
    • Manchester Coded or Uncoded Bitstream Options
  • Excellent DC Performance:
    • Offset Error: ±100 µV (max)
    • Offset Drift: 1 µV/°C (max)
    • Gain Error: ±0.2% (max)
    • Gain Drift: ±40 ppm/°C (max)
  • Transient Immunity: 100 kV/µs (typ)
  • System-Level Diagnostic Features
  • Safety-Related Certifications:
    • 7000-VPEAK Reinforced Isolation per DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
    • 5000-VRMS Isolation for 1 Minute per UL1577
    • CAN/CSA No. 5A-Component Acceptance Service Notice, IEC 60950-1, and IEC 60065 End Equipment Standards
  • Fully Specified Over the Extended Industrial Temperature Range: –40°C to +125°C

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Parametrics Compare all products in Isolated ADCs

Sample Rate (max) (SPS)
# Input Channels
Input Range (Vp-p)
Isolation (kV peak)
CMTI (Min) (kV/µs)
INL (Max) (+/-LSB)
SNR (dB)
THD (Max) (dB)
Power Consumption (Typ) (mW)
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Digital Supply (Min) (V)
Digital Supply (Max) (V)
Operating Temperature Range (C)
AMC1306M25 AMC1306E25
21MSPS    21MSPS   
1    1   
250 mV    250 mV   
Serial CMOS    Serial CMOS   
8    8   
50    50   
4    4   
82    82   
-85    -85   
42.4    42.4   
Delta-Sigma    Delta-Sigma   
3    3   
5.5    5.5   
2.7    2.7   
5.5    5.5   
Catalog    Catalog   
-40 to 125    -40 to 125