AMC1305L25 Reinforced Isolated Modulator With ±250mV Input and LVDS Interface | TI.com

AMC1305L25 (ACTIVE)

Reinforced Isolated Modulator With ±250mV Input and LVDS Interface

 

Description

The AMC1305 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 7000 VPEAK according to the DIN V VDE V 0884-10, UL1577, and CSA standards. Used in conjunction with isolated power supplies, the device prevents noise currents on a high common-mode voltage line from entering the local system ground and interfering with or damaging low voltage circuitry.

The AMC1305 is optimized for direct connection to shunt resistors or other low voltage level signal sources and supports excellent dc and ac performance. Shunt resistors are typically used to sense currents in motor drives, green energy generation systems, or other industrial applications. By using an appropriate digital filter (that is, as integrated on the TMS320F2837x) to decimate the bit stream, the device can achieve 16 bits of resolution with a dynamic range of 85 dB (13.8 ENOB) at a data rate of 78 kSPS.

On the high-side, the modulator is supplied with a nominal voltage of 5 V (AVDD), whereas the isolated digital interface operates from a 3.3-V or 5-V power supply (DVDD).

The AMC1305 is available in a wide-body SOIC-16 (DW) package and is specified from –40°C to +125°C.

Features

  • Pin-Compatible Family Optimized for Shunt-Resistor-Based Current Measurements:
    • ±50-mV or ±250-mV Input Voltage Ranges
    • CMOS or LVDS Digital Interface Options
  • Excellent DC Performance Supporting High-Precision Sensing on System Level:
    • Offset Error: ±50 µV or ±150 µV (max)
    • Offset Drift: 1.3 µV/°C (max)
    • Gain Error: ±0.3% (max)
    • Gain Drift: ±40 ppm/°C (max)
  • Safety-Related Certifications:
    • 7000-VPK 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
  • Transient Immunity: 15 kV/µs (min)
  • High Electromagnetic Field Immunity
    (see Application Note SLLA181A)
  • External 5-MHz to 20-MHz Clock Input for
    Easier System-Level Synchronization
  • Fully Specified Over the Extended Industrial Temperature Range

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Parametrics Compare all products in Isolated ADCs

 
Resolution (Bits)
Input Range (Vp-p)
Number of input channels
Interface
Isolation (kV peak)
CMTI (Min) (kV/µs)
INL (Max) (+/-LSB)
SNR (dB)
Power Consumption (Typ) (mW)
Architecture
Rating
Operating Temperature Range (C)
AMC1305L25 AMC1305M05 AMC1305M25
16     16     16    
±250mV     ±50mV     ±250mV    
1     1     1    
LVDS     Serial CMOS     Serial CMOS    
7     7     7    
15     15     15    
4     4     4    
85     76     85    
49.3     38.4     36.1    
Delta-Sigma     Delta-Sigma     Delta-Sigma    
Catalog     Catalog     Catalog    
-40 to 125     -40 to 125     -40 to 125