LMH6515 600 MHz, Digital Controlled, Variable Gain Amplifier from the PowerWise® Family

Parameters	Values
Gain Adjust Range	31 dB
Signal Channel BW	600 MHz
Supply Min	4 Volt
Supply Max	5 Volt
Gain Control Interface	Parallel TTL/CMOS
Supply Current	100 mA
PowerWise Rating 2	167 uA/MHz
Output Current	20 mA
Offset Voltage max, 25C	30 mV
Voltage Noise	1.8 nV/root(Hz)
HD 2nd	-80 dB
HD 3rd	-60 dB
Special Features	1db Steps, Differential I/O
Function	VGA
Temperature Min	-40 deg C
Temperature Max	85 deg C
PowerWise	Yes

LMH6515 特性Features

Adjustable gain with a 31 dB range
Precise 1 dB gain steps
Parallel 5-bit gain control
On chip register stores gain setting
Fully differential signal path
Single ended to differential capable
200Ω input impedance
Small footprint (4 mm x 4 mm) LLP package

LMH6515 概述Description

The LMH6515 is a high performance, digitally controlled variable gain amplifier (DVGA). It combines precision gain control with a low noise, ultra-linear, differential amplifier. Typically, the LMH6515 drives a high performance ADC in a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range. When used in conjunction with a high speed ADC, system dynamic range can be extended by up to 32 dB.

The LMH6515 has a differential input and output allowing large signal swings on a single 5V supply. It is designed to accept signals from RF elements and maintain a terminated impedance environment. The input impedance is 200Ω resistive. The output impedance is either 200Ω or 400Ω and is user selectable. A unique internal architecture allows use with both single ended and differential input signals.

Input signals to the LMH6515 are scaled by a highly linear, digitally controlled attenuator with 31 accurate 1 dB steps. The attenuator output provides the input signal for a high gain, ultra linear differential transconductor. The transconductor differential output current can be converted into a voltage by using the on-chip 200Ω or 400Ω loads. The transconductance gain is 0.1 Amp/Volt resulting in a maximum voltage gain of +26 dB when driving a 200Ω load, or 32 dB when driving the 400Ω load. On chip digital latches are provided for local storage of the gain setting. The gain step settling time is 5 ns and care has been taken to reduce the sensitivity of bandwidth and phase to gain setting.

The LMH6515 operates over the industrial temperature range of −40°C to +85°C. The LMH6515 is available in a 16-Pin, thermally enhanced, LLP package.

LMH6515 关键特性Key Specification

600 MHz bandwidth @ 100Ω load
40 dBm OIP3 @ 75 MHz, 200Ω load
20 dB to 30 dB maximum gain
Selectable output impedance of 200Ω or 400Ω
8.3 dB noise figure
5 ns gain step switching time
100 mA supply current

LMH6515 应用Applications

Cellular base stations
IF sampling receivers
Instrumentation
Modems
Imaging
Differential line receiver

LMH6515 功能框图Typical Application	LMH6515 功能框图Block Diagram	LMH6515 典型性能Typical Performance

LMH6515 芯片订购型号Order

Part Number(s) (NSID)	Top View	Availability	Budgetary Pricing	Pack Size
LMH6515SQ/NOPB	LLP	Full production Lead Time: 6 weeks	$4.25 each at 1K+ pcs	reel of 1000
LMH6515SQX/NOPB	LLP	Full production Lead Time: 6 weeks	$4.25 each at 1K+ pcs	reel of 4500

LMH6515 开发工具

Part Number(s) (NSID)	Description	Availability	Budgetary Pricing	Pack Size
LMH6515EVAL	LMH6515 Digital Controlled Variable Gain Amplifier Evaluation Board	Full production	$120.00 each	1

LMH6515 封装Packaging

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LMH6515SQ/NOPB	39.462	LLP	16	3	260	Detail	Download	N/A	NS UZXYTT L6515SQ
LMH6515SQX/NOPB	39.461	LLP	16	3	260	Detail	Download	N/A	NS UZXYTT L6515SQ

LMH6515 标准体系参考Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMH6515SQ	BICMOS8B+	0	1152	0	0	743900	5	211083656
LMH6515SQX	BICMOS8B+	0	1152	0	0	743900	5	211083656