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Analog Devices Inc. AD8370AREZ-RL7
- Part No.:
- AD8370AREZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
AD8370AREZ-RL7.pdf
- Description:
- IC VARIABLE GAIN 1 CIRC 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,425
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Product details
Overview
AD8370AREZ-RL7 from Analog Devices is a digitally controlled variable gain amplifier (VGA) with differential input/output, −3 dB bandwidth of 750 MHz, 40 dB precision gain range (−11 dB to +34 dB), and 7 dB noise figure at maximum gain. It serves as a high-linearity IF/RF gain stage in receiver signal chains requiring wide dynamic range and low distortion.
For engineers reviewing the AD8370AREZ-RL7 datasheet, AD8370AREZ-RL7 pinout, AD8370AREZ-RL7 application, or AD8370AREZ-RL7 equivalent, key selection criteria include its dual-range digital gain control (2-bit MSB mode select + 7-bit vernier), 200 Ω differential input / 100 Ω differential output impedance matching, power-down current < 4 mA, and operation from 3 V to 5 V supply.
Technical Context
The AD8370AREZ-RL7 implements a three-stage architecture: selectable high/low gain preamplifier (MSB-controlled), digitally tuned transconductance (gm) stage with ≤0.059 dB/code resolution in low-gain mode, and fixed-gain differential output amplifier. Its XFCB bipolar process enables 750 MHz flat bandwidth and two-tone IP3 of 35 dBm at 70 MHz.
Gain is set via an 8-bit serial interface (CLCK/DATA/LTCH) with latch-synchronized loading; the MSB selects between low-gain (−11 dB to +17 dB) and high-gain (+6 dB to +34 dB) ranges, preserving gain state during power-down. Input common-mode range spans 3.2 Vp-p, and VOCM delivers midsupply common-mode voltage for external decoupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 750 MHz - supports wideband IF sampling up to 375 MHz Nyquist zone without roll-off. |
| Gain Range | 40 dB (−11 dB to +34 dB) - enables precise AGC across multi-decade input signal amplitudes. |
| Noise Figure | 7.2 dB @ 70 MHz - ensures minimal SNR degradation in sensitive receiver front-ends. |
| Output IP3 | 35 dBm @ 70 MHz - maintains linearity against strong adjacent-channel interferers in crowded RF bands. |
| Input Impedance | 200 Ω differential - matches standard SAW filter and transformer outputs without external termination. |
| Supply Voltage | 3.0 V to 5.5 V - allows direct integration into 3.3 V or 5 V mixed-signal systems. |
| Power-Down Current | 3.7 mA - reduces system standby power while retaining gain setting for fast wake-up. |
Pinout & Package
AD8370AREZ-RL7 is housed in a thermally enhanced 16-lead TSSOP package (4.4 mm × 5.0 mm × 1.2 mm) with exposed paddle for improved thermal dissipation. The exposed paddle (Pins 2, 15, and thermal pad) must be soldered to a low-impedance ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INHI / INLO | Differential input pair | 200 Ω differential input impedance; internally biased; accepts ±1.6 Vp-p common-mode swing. |
| OPHI / OPLO | Differential output pair | 100 Ω differential output impedance; midsupply-biased; delivers up to 8.4 Vp-p swing into ≥1 kΩ load. |
| VCCI / VCCO | Input/output supply rails | Independent 3.0–5.5 V supplies; require local 0.1 µF ceramic bypassing per rail. |
| ICOM / OCOM | Input/output common reference | Low-impedance ground connection points; tied internally to exposed paddle. |
| VOCM | Output common-mode voltage output | Provides midsupply voltage for external decoupling; not to be driven externally. |
| PWUP | Power enable control | Logic-high (>1.8 V) enables operation; logic-low (<0.8 V) enters sub-4 mA power-down state. |
| DATA / CLCK / LTCH | Serial 8-bit gain interface | TTL-compatible; latched on rising CLCK edge while LTCH is low; MSB selects gain range. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-range digital gain control | MSB-selectable low-gain (−11 dB to +17 dB) and high-gain (+6 dB to +34 dB) modes optimize noise vs. linearity trade-off per signal level. |
| High-resolution vernier adjustment | 7-bit fine tuning yields ≤0.059 dB/code step in low-gain mode, enabling precise AGC loop calibration. |
| Differential I/O with active impedance | 200 Ω input / 100 Ω output formed by active circuitry-no external resistors needed for SAW or transformer interfacing. |
| Preserved gain during power-down | Gain code retained in latch when PWUP = low, allowing immediate resumption of prior gain setting on wake-up. |
| Thermally optimized TSSOP | Exposed paddle reduces θJA to 30°C/W when soldered-supports 78 mA quiescent current at full gain without derating. |
Applications
| IF Sampling Receiver Front-End | Differential ADC Driver |
|---|---|
Use Scenario: Digitizing 70 MHz IF signals from mixer outputs in cellular base station receivers. IC Role / Device Role / Timing Role: VGA gain stage placed between quadrature mixer and differential ADC input. Use Value: 750 MHz bandwidth preserves phase coherence across 20 MHz LTE channels; 35 dBm IP3 prevents intermodulation from blocker signals. | Use Scenario: Driving AD9246 or similar 16-bit differential ADCs in medical ultrasound beamformers. IC Role / Device Role / Timing Role: Signal-conditioning amplifier ensuring full-scale ADC utilization across varying echo amplitudes. Use Value: 40 dB gain range accommodates >100 dB dynamic range of acoustic returns; 7.2 dB noise figure preserves weak-signal SNR. |
| SAW Filter Interface Amplifier | Cable Modem Upstream Path |
Use Scenario: Buffering and gain-adjusting output of 120 MHz SAW bandpass filters in spectrum analyzers. IC Role / Device Role / Timing Role: Post-filter gain block matching 200 Ω SAW differential output impedance. Use Value: Active 200 Ω input eliminates need for external termination resistors; flat gain response ±0.02 dB over 20 MHz passband. | Use Scenario: Programmable gain control in DOCSIS 3.1 upstream channel amplifiers operating at 5–85 MHz. IC Role / Device Role / Timing Role: Adaptive gain element compensating for cable loss variations across temperature and distance. Use Value: Power-down mode (<4 mA) enables energy-efficient burst-mode transmission; 3.3 V operation aligns with SoC supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled VGA applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8375ACPZ-R7 | Higher bandwidth (1.3 GHz), higher supply current (110 mA), same 16-lead LFCSP package. | Better suited for >1 GHz IF stages; less optimal for battery-powered or thermally constrained designs. | Select AD8375ACPZ-R7 when bandwidth >1 GHz is required and thermal headroom permits higher quiescent power. |
| LMH6401IRGTR | Analog gain control (0–24 dB), 1.7 GHz bandwidth, 3.3 V only, different pinout and biasing scheme. | Lacks digital interface and dual-range capability; requires external DAC and loop compensation. | Choose LMH6401IRGTR for analog AGC loops where digital control complexity must be avoided. |
Compared with AD8370AREZ-RL7, AD8375ACPZ-R7 extends usable frequency range but increases power and thermal demands, while LMH6401IRGTR trades digital programmability for wider bandwidth and analog simplicity-neither is pin-compatible, and both require PCB layout changes.
Availability
AD8370AREZ-RL7 is available at Aetrix Electronics and suitable for IF sampling receivers, differential ADC drivers, SAW filter interfaces, and cable modem upstream paths requiring stable component supply and guaranteed long-term availability.
Supply support for AD8370AREZ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD8370AREZ-RL7 belongs to Analog Devices' high-speed variable gain amplifier product line, engineered specifically for wideband receiver gain control with simultaneous low noise, high linearity, and digital programmability in compact packages.
FAQ
What is the maximum operating frequency of the AD8370AREZ-RL7?
The AD8370AREZ-RL7 has a −3 dB bandwidth of 750 MHz, verified across its full 40 dB gain range. At 70 MHz, gain flatness is ±0.02 dB; at 380 MHz, it degrades to ±0.04 dB. Performance remains functional up to 750 MHz, making AD8370AREZ-RL7 suitable for IF stages in LTE, WiMAX, and cable infrastructure systems.
How does the dual-gain-range architecture of the AD8370AREZ-RL7 improve system performance?
The AD8370AREZ-RL7 uses an MSB-controlled dual preamplifier structure: low-gain mode (−11 dB to +17 dB) prioritizes noise figure (7.2 dB), while high-gain mode (+6 dB to +34 dB) emphasizes dynamic range. This lets designers select the optimal trade-off per signal condition-e.g., AD8370AREZ-RL7 in low-gain mode improves receiver sensitivity for weak signals, whereas high-gain mode handles large blockers without compression.
Can the AD8370AREZ-RL7 drive a 50 Ω single-ended load directly?
No. The AD8370AREZ-RL7 features differential 100 Ω output impedance and requires either a 100 Ω differential load or external balun/transformer for single-ended conversion. Driving a 50 Ω single-ended load directly causes ~3.5 dB gain error and mismatch-induced return loss; proper interface requires impedance transformation per Figure 44 in the AD8370AREZ-RL7 datasheet.
What is the power-down behavior of the AD8370AREZ-RL7, and does it retain configuration?
When PWUP is pulled low (<0.8 V), the AD8370AREZ-RL7 draws <4 mA and achieves >60 dB input-to-output isolation. Critically, the internal 8-bit gain latch retains the last programmed value, so AD8370AREZ-RL7 resumes exact prior gain setting within nanoseconds of PWUP returning high-no reinitialization or SPI retransmission is needed.
Is the AD8370AREZ-RL7 compatible with 3.3 V logic interfaces?
Yes. The AD8370AREZ-RL7 digital interface (DATA, CLCK, LTCH, PWUP) is TTL-compatible with VIH = 1.8 V min and VIL = 0.8 V max, fully interoperable with 3.3 V microcontrollers and FPGAs. Its 3.0–5.5 V supply range also supports direct 3.3 V operation, and quiescent current drops to ~72 mA at 3.3 V-making AD8370AREZ-RL7 ideal for portable and low-voltage systems.
AD8370AREZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Variable Gain
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 5750V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 750 MHz
- Current - Input Bias:
- 400 pA
- Voltage - Input Offset:
- -
- Current - Supply:
- 79mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
AD8370AREZ-RL7 FAQ
1.How can I place an order for AD8370AREZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8370AREZ-RL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD8370AREZ-RL7 reliable?
The price and inventory of AD8370AREZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8370AREZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD8370AREZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8370AREZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8370AREZ-RL7?
AD8370AREZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8370AREZ-RL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD8370AREZ-RL7?
For technical support, including AD8370AREZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8370AREZ-RL7 requirements.
6.How does Aetrix verify that AD8370AREZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD8370AREZ-RL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD8370AREZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD8370AREZ-RL7?
All AD8370AREZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8370AREZ-RL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD8370AREZ-RL7 part is unused and in its original packaging.
Return procedure for AD8370AREZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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