HT5700 Low Power HART Chip (Modem)

Brand : Microcyber
Product origin : Liaoning, China
Delivery time : In Stock
Supply capacity :10000Pieces/Month

HT5700 Low Power HART Chip (Modem)：
1. HT5700 Low Power HART Chip Fully integrated FSK modem compliant with HART standards；
2. HT5700 Low Power HART Chip HART output with drive capability
3. HT5700 Low Power HART Chip Internal integrated crystal oscillator to simplify circuit
4. HT5700 Low Power HART Chip Working temperature: -40℃~+125℃
5. HT5700 Low Power HART Chip Working current: <115u4 (3.3V)
6. HT5700 Low Power HART Chip Dimension: 4mmx4mm, encapsulation: LFCSP24
7. HT5700 Low Power HART Chip Fully compatible with Onsemi AD5700, reducing material costs

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HT5700M Low Power HART Chip (Modem): is a single-chip HART communication solution designed for HART® FSK half-duplex modems and complies with the HART physical layer specification. The HT5700 integrates the necessary filtering, signal detection, modulation, demodulation, and signal generation functions, requiring minimal external components. The chip also features an integrated 0.5% accuracy oscillator, significantly reducing board space and making it an ideal choice for HART circuit designs.

Low Power HART Chip

Function Block Diagram

HT5700M Low Power HART Chip (Modem) Features：

1. HART-compliant fully integrated FSK modem

2. 115μA maximum supply current in receive mode

3. Suitable for intrinsically safe applications

4. Integrated receive band-pass filter-Minimal external components required

5. Clocking optimized for various system configurations-Ultralow power crystal oscillator (60μA maximum), external CMOS clock source, precision internal oscillator

6. Buffered HART output—extra drive capability

7. 8kV HBM ESD rating

8. 2.7V to 5.5V power supply

9. 1.71V to 5.5V interface

10. -40°C to +125°C operation

11. 4mm × 4mm QFN package

12. HART physical layer compliant

13. UART interface

HT5700M Low Power HART Chip (Modem) Applications：

1. Field transmitters

2. HART multiplexers

3. PLC and DCS analog I/O modules

4. HART network connectivity

HT5700M Low Power HART Chip (Modem) Dimension:

HART Chip

HT5700M Low Power HART Chip (Modem) Specifications：

Parameter ①	Min	Typ	Max	Unit	Test Conditions/Comments
POWER REQUIREMENTS ②
VCC	2.7		5.5	V
IOVCC	1.71		5.5	V
VCC and IOVCC Current Consumption
Demodulator		86	115	µA	External clock, −40°C to +85°C
			179	µA	External clock, −40°C to +125°C
		69	97	µA	External clock, −40°C to +85°C, External reference
			157	µA	External clock, −40°C to +125 °C, External reference
Modulator		124	140	µA	External clock, −40°C to +85°C
			193	µA	External clock, −40°C to +125°C
		73	96	µA	External clock, −40°C to +85°C, External reference
			153	µA	External clock, −40°C to +125°C, External reference
Crystal Oscillator ③		33	60	µA	External crystal, 16 pF at XTAL1 and XTAL2
		44	71	µA	External crystal, 36 pF at XTAL1 and XTAL2
Internal Oscillator ④		87	110	µA	External crystal not required
Power -Down Mode					RESET=REF_EN= DGND
		30	45	µA	Internal reference disabled, −40°C to +85°C
			55	µA	Internal reference disabled, −40°C to +125°C
INTERNAL VOLTAGE REFERENCE
Internal Reference Voltage	1.49	1.5	1.51	V	REF_EN= IOVCC to enable use of internal reference; VCC= 2.7V minimum
Load Regulation		18		ppm/µA	Tested with 50 µA load
OPTIONAL EXTERNAL VOLTAGE
REFERENCE
External Reference Input Voltage	2.47	2.5	2.53	V	REF_EN= DGND to enable use of external reference, VCC = 2.7V minimum
External Reference Input Current
Demodulator		14	16	µA	Current required by external reference in receive mode
Modulator		37	40	µA	Current required by external reference in transmit mode
Internal Oscillator		14	16	µA	Current required by external reference if using internal oscillator
Power -Down		14	16	µA
DIGITAL INPUTS
VIH，Input High Voltage	0.7× IOVCC			V
VIL，Input Low Voltage			0.3×OVCC	V
Input Current	−0.1		+0.1	µA
Input Capacitance ⑤		5		pF	Per pin
DIGITAL OUTPUTS
VOH，Output High Voltage	IOVCC−0.5			V
VOL，Output Low Voltage			0.4	V
CD Assert ⑥	85	100	110	mVp-p
HART_IN INPUT ⑤
Input Voltage range	0		REF	V	External reference source
	0		1.5	V	Internal reference enabled
HART_OUT OUTPUT
Output Voltage	459	493	505	mVp-p	AC-coupled (2.2µF), measured at HART_OUT pin with 160Ω load (worst-case load)
Mark Frequency ⑦		1200		Hz	Internal oscillator
Space Frequency ⑦		2200		Hz	Internal oscillator
Frequency Error	−0.5		+0.5	%	Internal oscillator, −40°C to +85°C
	−1		+1	%	Internal oscillator, −40°C to +125°C
Phase Continuity Error ⑤			0	Degrees
Maximum Load Current ⑤		160		Ω	Worst-case load is 160Ω, ac-coupled with 2.2µF. for recommended configuration if driving a resistive load
Transmit Impedance		7		Ω	RTS low, at the HART_OUT pin
		70		kΩ	RTS high, at the HART_OUT pin
INTERNAL OSCILLATOR
Frequency	1.2226	1.2288	1.2349	MHz	−40°C to+85°C
	1.2165	1.2288	1.2411	MHz	−40°C to+125°C
EXTERNAL CLOCK
External Clock Source Frequency	3.6496	3.6864	3.7232	MHz

① Temperature range: −40°C to +125°C; typical at 25°C.

② Current consumption specifications are based on mean current values.

③ The demodulator and modulator currents are specified using an external clock. If using an external crystal oscillator, the crystal oscillator current specification must be added to the corresponding VCC and IOVCC demodulator/modulator current specification to obtain the total supply current required in this mode.

④ The demodulator and modulator currents are specified using an external clock. If using the internal oscillator, the internal oscillator current specification must be added to the corresponding VCC and IOVCC demodulator/modulator current specification to obtain the total supply current required in this mode.

⑤ Guaranteed by design and characterization, but not production tested.

⑥ Specification set assuming a sinusoidal input signal containing preamble characters at the input and an ideal external filter (see Figure 18).

⑦ If the internal oscillator is not used, frequency accuracy is dependent on the accuracy of the crystal or clock source used.

HT5700M Low Power HART Chip (Modem) Typical Connection Diagram for External and Internal Filter Options:

HART Communication Controller